CN217313972U

CN217313972U - Gas control device for spray gun

Info

Publication number: CN217313972U
Application number: CN202220072741.0U
Authority: CN
Inventors: 黄忠义
Original assignee: Zhangjiagang Lijie Hardware Tools Co ltd
Current assignee: Zhangjiagang Lijie Hardware Tools Co ltd
Priority date: 2022-01-12
Filing date: 2022-01-12
Publication date: 2022-08-30
Anticipated expiration: 2032-01-12

Abstract

The utility model provides a gas control device for a spray gun, which comprises a gun body, wherein the gun body is provided with a nozzle, a handle and a trigger positioned on one side of the handle; an air inlet channel communicated with an external air source is arranged in the handle, a movable air pressure control knob is arranged on the air inlet channel, and the air volume of the air inlet channel is adjusted by rotating the air pressure control knob, so that the paint spraying is uniform. A first air cavity and a second air cavity which are communicated with each other are arranged in the gun body, and the air inlet channel is communicated with the first air cavity; the first air cavity is internally provided with an air ejector pin and a rotatable air volume control knob, and the trigger can push the air ejector pin to move towards one side of the air volume control knob; a spraying width adjusting knob which can rotate and move is arranged in the second air cavity, and the air output is adjusted, so that the paint spraying is uniform. One end of the second cavity, which is far away from the spray width adjusting knob, is provided with a width adjusting gas circuit, the width adjusting gas circuit is communicated with a nozzle, and the spray width is adjusted by controlling the air input entering the width adjusting gas circuit through the spray width adjusting knob.

Description

Gas control device for spray gun

Technical Field

The utility model relates to a pneumatic spray gun equipment especially relates to a gas control device for spray gun.

Background

The spray gun is powered by compressed air generated by an air compressor, when the compressed air is sprayed out through a spray cap at the front part of the spray gun, a low-pressure area lower than the atmospheric pressure is generated at the front part of a paint nozzle connected with the spray gun, the paint is sucked out of an air cup kettle, and the paint is atomized into particles and sprayed on the surface of a coated object under the action of high-speed jet force of the compressed air.

The existing air compressor has large power difference, the pressure difference of the generated compressed air is large, the spray gun is directly connected with the air compressor or the air cylinder, when the pressure of the compressed air is large, the power of paint mist sprayed by the spray gun is large, the paint mist is easy to rebound, the adhesive force of paint is reduced, when the pressure of the compressed air is small, the paint mist is difficult to spray to a spraying surface, therefore, a user needs to perform experiments before formal spraying, and the opening degree of an air flow valve is adjusted according to the pressure of the compressed air, so that the control is difficult to handle.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned shortcomings of the prior art, the present invention provides a gas control device for a spray gun, which is used for solving the problems of uneven spraying and unable adjustment of spraying width of the spray gun in the prior art.

In order to achieve the above and other related objects, the present invention provides a gas control device for a spray gun, comprising a gun body, wherein a nozzle is arranged at the front end of the gun body; the lower end of the gun body is provided with a grip and a trigger positioned on one side of the grip; wherein:

an air inlet channel communicated with an external air source is arranged in the handle, a movable air pressure control knob is arranged on the air inlet channel, and the air volume of the air inlet channel is adjusted by rotating the air pressure control knob;

a first air cavity and a second air cavity which are communicated with each other are arranged in the gun body, and the air inlet channel is communicated with the first air cavity; the trigger can push the gas ejection needle to move towards one side of the gas quantity control knob;

a spray width adjusting knob which can rotate and move is arranged in the second air cavity; a width adjusting air passage is arranged at one end of the second air cavity, which is far away from the spray width adjusting knob, the air inflow entering the width adjusting air passage is controlled by moving the spray width adjusting knob, and the other end of the width adjusting air passage is communicated with the nozzle;

and a negative pressure air path is arranged on the second air cavity, and the other end of the negative pressure air path is communicated with the nozzle.

The gas control device for the spray gun is characterized in that the gas inlet channel is in a herringbone shape, one end of the gas inlet channel is connected with an external gas source, the air pressure control knob is installed at one end of the gas inlet channel, and the other end of the gas inlet channel is communicated with the first gas cavity; the air pressure control knob is rotated to plug or open the communication between the air inlet channel and the first air cavity.

The gas control device for the spray gun is characterized in that the first gas cavity comprises a first auxiliary cavity and a second auxiliary cavity; the first auxiliary cavity is communicated with the second air cavity, and the second auxiliary cavity is communicated with the air inlet channel; one end of the air ejector pin, which is far away from the trigger, is positioned between the first auxiliary cavity and the second auxiliary cavity.

The gas control device for the spray gun is characterized in that a return spring is arranged between the gas thimble and the gas flow control knob.

The gas control device for the spray gun, wherein the second gas cavity comprises a third auxiliary cavity and a fourth auxiliary cavity; the width adjusting knob is arranged in the third auxiliary cavity, and the third auxiliary cavity is communicated with the first air cavity and the negative pressure air path; the width adjusting gas path is communicated with the fourth auxiliary cavity; the diameter of the width adjusting knob is smaller than the inner diameter of the third auxiliary cavity and larger than the inner diameter of the fourth auxiliary cavity.

As described above, the gas control device for the spray gun of the present invention has the following advantages:

1. the utility model discloses a be equipped with the air pressure control knob and can further adjust the air input to make and unanimous from nozzle spun negative pressure gas volume, guarantee to spray paint evenly.

2. The utility model discloses a rotatory tolerance control knob can control the maximum distance that the gas cap needle moves back, further adjusts the air output, makes and sprays paint evenly.

3. The utility model discloses a gas circuit spun quantity of gas is adjusted from the width to spraying width control knob control to adjust the spraying width.

Drawings

FIG. 1 is a cross-sectional view of a gas control device for a spray gun according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of a gas control device for a spray gun according to an embodiment of the present invention.

Element number description:

1. a gun body; 2. a nozzle; 3. a grip; 4. a trigger; 5. an air inlet channel; 6. a pneumatic control knob; 7. a first air cavity; 8. a second air cavity; 9. a gas thimble; 10. a gas amount control knob; 11. a spray width adjustment knob; 12. a width adjusting gas circuit; 13. a negative pressure gas circuit; 14. a first auxiliary chamber; 15. a second auxiliary chamber; 16. a third auxiliary chamber; 17. a fourth auxiliary chamber; 18. a paint cavity; 19. a lacquer thimble; 20. a feed inlet; 21. paint control knob.

Detailed Description

The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.

Please refer to fig. 1-2. It should be understood that the structure, ratio, size and the like shown in the drawings of the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention does not have the essential significance in the technology, and any modification of the structure, change of the ratio relationship or adjustment of the size should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that can be achieved. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.

Referring to fig. 1 to 2, the present invention provides a gas control device for a spray gun, which includes a gun body 1, wherein a nozzle 2 is disposed at the front end of the gun body 1; the lower end of the gun body 1 is provided with a grip 3 and a trigger 4 positioned at one side of the grip 3. In addition, the top of the gun body 1 is provided with a feeding hole 20, the feeding hole 20 is used for installing a paint bucket, a paint cavity 18 is arranged in the nozzle 2, the paint cavity 18 is connected with the paint bucket through the feeding hole 20, and paint is sprayed out through the front end of the paint cavity 18. A paint ejector pin 19 is arranged in the paint cavity 18, a movable paint control knob 21 is arranged at the tail end of the paint ejector pin 19, the maximum distance that the paint ejector pin can retreat is controlled by moving the paint control knob 21, when a user pushes the trigger 4 during spraying, the trigger 4 drives the paint ejector pin to retreat, the paint cavity 18 is opened, and paint is sprayed.

Wherein, be equipped with the intake duct 5 of putting through external air supply in this embodiment handle 3, be equipped with mobilizable air pressure control knob 6 on the intake duct 5, adjust the air output of intake duct 5 through rotatory air pressure control knob 6 for the negative pressure gas volume of following the nozzle spun is unanimous, keeps spraying paint evenly. A first air cavity 7 and a second air cavity 8 which are communicated with each other are arranged in the gun body 1, and the air inlet channel 5 is communicated with the first air cavity 7. The first air cavity 7 is internally provided with an air ejector pin 9 and a rotatable air volume control knob 10, the trigger 4 can push the air ejector pin 9 to move towards one side of the air volume control knob 10, the ventilation volume is further adjusted, and the uniform paint spraying is ensured. A return spring is arranged between the air ejector pin 9 and the air control knob 10, so that the trigger 4 and the air ejector pin 9 return to the original position. Be equipped with rotatable movement's spraying width adjust knob 11 in the second air cavity 8, the one end that spraying width adjust knob 11 was kept away from to second air cavity 8 is equipped with width control gas circuit 12, the air input that gets into width control gas circuit 12 through removing spraying width adjust knob 11 control, thereby control is from the 12 spun gas volumes of width control gas circuit, width control gas circuit 12 other end switch-on nozzle 2, be equipped with the regulation hole on the nozzle 2, the spout circumference setting of lacquer chamber 18 is followed to the regulation hole, and the regulation hole opening is towards the spout of lacquer chamber 18, when the spray gun sprays, the gaseous range of dispersing of spraying that changes of regulation hole blowout, thereby control spraying width. Be equipped with negative pressure gas circuit 13 on the second air cavity 8, negative pressure gas circuit 13 other end switch-on nozzle 2, concretely, nozzle 2 is through spouting the front end of cap fixed mounting at the rifle body 1, and spout the cap and be equipped with the negative pressure chamber, the nozzle portion is located the negative pressure intracavity, the spout in lacquer chamber and the discharge end intercommunication in negative pressure chamber, negative pressure gas circuit 13 switch-on negative pressure chamber, compressed air forms the negative pressure in the negative pressure chamber, thereby the paint vehicle in suction lacquer chamber 18, thereby guarantee that the spray gun still can spray out even spraying under the paint vehicle reduces the condition in the lacquer bucket.

Furthermore, the air inlet channel 5 is in a herringbone shape, one end of the air inlet channel 5 is connected with an external air source, one end of the air inlet channel is provided with an air pressure control knob 6, and the other end of the air inlet channel is communicated with a first air cavity 7; the air inlet channel 5 is blocked or opened to be communicated with the first air cavity 7 by rotating the air pressure control knob 6.

Further, the first air cavity 7 comprises a first auxiliary cavity 14 and a second auxiliary cavity 15; the first auxiliary cavity 14 is communicated with the second air cavity 8, and the second auxiliary cavity 15 is communicated with the air inlet channel 5; one end of the air ejector pin 9, which is far away from the trigger 4, is positioned between a first auxiliary cavity 14 and a second auxiliary cavity 15, when the trigger is not moved, the communication between the first air cavity 7 and the second air cavity 8 is blocked through the air ejector pin 9, specifically, the air ejector pin 9 comprises a first blocking head with a large cross section, the first blocking head blocks the first auxiliary cavity 14 and the second auxiliary cavity 15, the trigger 4 is triggered to push the air ejector pin 9 to retreat, the first blocking head opens the first auxiliary cavity 14 and the second auxiliary cavity 15, namely, the communication between the first air cavity 7 and the second air cavity 8 is opened, the air inlet channel 5 is positioned between the first blocking head and the air quantity control knob 10, the maximum distance that the air ejector pin 9 can retreat is adjusted through rotating the air quantity control knob 10 to control whether the first blocking head can pass through the air inlet channel 5, when the first blocking head passes through the air inlet channel 5, the air inlet quantity is increased, when the first blocking head does not pass through the air inlet channel 5, because the first blocking head has a large cross section, blocking the passage of air reduces the amount of intake air.

Further, the second air cavity 8 comprises a third auxiliary cavity 16 and a fourth auxiliary cavity 17; the width adjusting knob is arranged in the third auxiliary cavity 16, and the third auxiliary cavity 16 is communicated with the first air cavity 7 and the negative pressure air channel 13; the width adjusting gas path 12 is communicated with the fourth auxiliary cavity 17; the diameter of the width adjusting knob is smaller than the inner diameter of the third auxiliary cavity 16, so that the negative pressure air channel 13 is always communicated with the second air cavity 8, the spraying width adjusting knob 11 is larger than the inner diameter of the fourth auxiliary cavity 17, and the second air cavity 8 is blocked or opened and the width adjusting air channel 12 is communicated by rotating and moving the spraying width adjusting knob 11.

Specifically, in this embodiment, the spray width adjusting knob 11 is composed of a knob and a plugging needle which are fixedly connected together, the knob is connected to the inner wall of the third auxiliary cavity 16 through threads, the plugging needle is located in the third auxiliary cavity 16, a second plugging head is arranged at one end, far away from the knob, of the plugging needle, the fourth auxiliary cavity 17 is plugged through the second plugging head, the plugging needle is driven to move towards one end, far away from the fourth auxiliary cavity 17, through the rotary moving knob, and therefore the width adjusting air path 12 is communicated with the third auxiliary cavity 16 and further communicated with the first air cavity 7.

To sum up, the utility model relates to a gas controlling means is used to spray gun passes through 6 shutoff of rotary motion air pressure control knob or opens the intercommunication between intake duct 5 and the first air cavity to adjust the air input, make from 2 spun negative pressure gas volumes of nozzle unanimous, guarantee the degree of consistency that sprays paint. Meanwhile, the maximum distance of the backward movement of the air ejector pin 9 is adjusted and controlled by rotating and moving the air volume control knob 10, and the air output is further adjusted, so that the paint spraying is uniform. Further, the amount of gas ejected from the width adjustment gas passage 12 is controlled by rotating and moving the spray width adjustment knob 11, thereby adjusting the spray width. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. A gas control device for a spray gun comprises a gun body, wherein a nozzle is arranged at the front end of the gun body; the lower end of the gun body is provided with a grip and a trigger positioned on one side of the grip; the method is characterized in that:

2. The gas control device for the spray gun as claimed in claim 1, wherein the air inlet channel is in a shape of a Chinese character 'ren', one end of the air inlet channel is connected with an external gas source, one end of the air inlet channel is provided with the air pressure control knob, and the other end of the air inlet channel is communicated with the first air cavity; and the air inlet channel is blocked or opened to be communicated with the first air cavity by rotating and moving an air pressure control knob.

3. The gas control device for a lance as set forth in claim 1, wherein: the first air cavity comprises a first auxiliary cavity and a second auxiliary cavity; the first auxiliary cavity is communicated with the second air cavity, and the second auxiliary cavity is communicated with the air inlet channel; one end of the air ejector pin, which is far away from the trigger, is positioned between the first auxiliary cavity and the second auxiliary cavity.

4. A gas control apparatus for a lance as set forth in claim 3, wherein: and a return spring is arranged between the air ejector pin and the air volume control knob.

5. The gas control device for a lance as set forth in claim 1, wherein: the second air cavity comprises a third auxiliary cavity and a fourth auxiliary cavity; the spray width adjusting knob is arranged in the third auxiliary cavity, and the third auxiliary cavity is communicated with the first air cavity and the negative pressure air path; the width adjusting gas path is communicated with the fourth auxiliary cavity; the diameter of the spray width adjusting knob is smaller than the inner diameter of the third auxiliary cavity and larger than the inner diameter of the fourth auxiliary cavity.