Nozzle and spray gun using same

Abstract

The utility model discloses a nozzle and a spray gun using the same, and relates to the technical field of spray guns. The nozzle comprises a nozzle body, a liquid inlet is formed in the front surface of the nozzle body, a liquid path is arranged on the upper surface of the nozzle body, extends towards the interior of the nozzle body and is communicated with the liquid inlet, a valve needle mounting hole is formed in the bottom of the liquid path, and a valve needle is arranged at the upper end of the nozzle body. The bottom end of the valve needle is in threaded connection with the valve needle mounting hole, the diameter of the valve needle is smaller than that of the liquid path, an air connecting opening is formed in the lower end of the nozzle body, three air holes are formed in the lower end of the interior of the nozzle body and located in the periphery of the liquid path, and the upper end of the valve needle is sleeved with an inner nozzle. A conical valve needle cavity is formed in the inner nozzle, the upper end of the inner nozzle is communicated with a valve nozzle, air outlet holes are formed in the left side and the right side of a body of the inner nozzle and located in the periphery of the valve needle cavity, and a spray cap assembly is arranged at the upper end of the inner nozzle.

Description

Technical Field

[0001] The utility model relates to the technical field of spray guns, in particular to a nozzle and a spray gun using the nozzle. Background Art

[0002] The spray gun is a machine that produces compressed air from an air compressor. When the compressed air is ejected through the air cap at the front of the spray gun, a low-pressure area lower than the atmospheric pressure is generated in front of the paint nozzle connected to it. The spray gun is included in the quick and easy selection of automatic models. The pressure difference generated at the spray gun mouth sucks the paint out of the paint tank, and under the action of the high-speed jet force of the compressed air, it is atomized into particles and sprayed on the surface of the object to be coated. It is often used for surface spraying of liquids such as rubber, paint, etc.

[0003] Most of the existing spray gun nozzles use a valve needle inserted into the interior of an outer spray cap. The pressure, material range and amount of material during spraying are adjusted by rotating the valve needle and the outer spray cap. There is no precise control over the material to be sprayed. Therefore, a nozzle and a spray gun using the nozzle are designed to solve the above problems. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies of the prior art, the utility model provides a nozzle and a spray gun using the nozzle, which solves the problem that the nozzle of the prior spray gun cannot accurately adjust the amount of the required sprayed material when in use.

[0006] (II) Technical solution

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] The utility model provides a nozzle, comprising: a nozzle body which is generally cylindrical, a front surface of the nozzle body being provided with a liquid inlet, a liquid path being provided on the upper surface of the nozzle body, the liquid path extending to the inside of the nozzle body and communicating with the liquid inlet, a valve needle mounting hole being provided at the bottom of the liquid path, a valve needle being provided at the upper end of the nozzle body, the bottom end of the valve needle being connected to the valve needle mounting hole by a thread, the diameter of the valve needle being smaller than the diameter of the liquid path, an air connecting port being provided at the lower end of the nozzle body, three air holes being provided at the lower end of the interior of the nozzle body, the air holes penetrating the nozzle body upward, the air holes being located at the periphery of the liquid path, an inner nozzle being sleeved at the upper end of the valve needle, a conical valve needle cavity being provided inside the inner nozzle, a valve mouth being communicated with at the upper end of the inner nozzle, air outlet holes being provided at the left and right sides of the body of the inner nozzle, the air outlet holes being located at the periphery of the valve needle cavity, the lower end of the inner nozzle being inserted and connected with the liquid path, and a spray cap assembly being provided at the upper end of the inner nozzle.

[0009] Preferably, the spray cap assembly comprises an outer spray cap arranged at the upper end of the inner nozzle, the outer spray cap is cylindrical as a whole and hollow inside, and a gas-liquid discharge outlet is opened at the upper end of the inner part of the outer spray cap.

[0010] Preferably, auxiliary nozzles are connected to the left and right sides of the upper end of the outer spray cap, and auxiliary pipes are opened on the left and right sides of the inner part of the outer spray cap, and the upper ends of the auxiliary pipes extend to the inside of the auxiliary nozzles.

[0011] Preferably, the outer spray cap is connected to the nozzle body via threads.

[0012] Preferably, the outer surface of the lower end of the outer spray cap is provided with anti-slip grooves around it.

[0013] Preferably, a sealing ring is provided around the outer surface of the lower end of the inner nozzle and around the outer surface of the upper end of the nozzle body.

[0014] The utility model provides a spray gun using the nozzle, comprising: a spray gun body, a liquid pipe is arranged inside the spray gun body, an air pipe is arranged inside the spray gun body and located on the right side of the inner side of the liquid pipe, interfaces are arranged at both ends of the liquid pipe and the air pipe, a liquid hose is arranged at the right end of the interface of the air pipe, installation interfaces are connected to both ends of the liquid hose, a valve cavity is arranged at the upper end of the right surface of the spray gun body, a valve core is arranged inside the valve cavity, a valve stem is connected to the right side of the valve core, a handle is arranged on the lower surface of the spray gun body and located on the right side of the valve cavity, the upper end of the handle is connected to the front and rear sides of the spray gun body through a rotating shaft, a rotating rod is inserted into the front end of the valve stem and connected, the rotating rod is connected to the inner side of the handle, the installation interface is connected to the liquid inlet, and the air inlet is connected to the interface through threads.

[0015] Preferably, an L-shaped hook is provided at the front end of the lower surface of the spray gun body.

[0016] Preferably, a rotary valve is connected to the lower surface of the spray gun body and located at the rear side of the hook, and the upper end of the rotary valve is connected to the inside of the air pipe.

[0017] (III) Beneficial effects

[0018] The utility model provides a nozzle and a spray gun using the nozzle, which have at least the following beneficial effects compared with the prior art:

[0019] This nozzle and the spray gun using the nozzle, when the outer spray cap is pushed down, will drive the inner nozzle to move downward, thereby reducing the distance between the valve needle and the valve needle cavity, and the amount of liquid discharged will decrease. When the outer spray cap is pushed upward, the inner nozzle will move upward with the outer spray cap, increasing the distance between the valve needle and the valve needle cavity, thereby increasing the amount of liquid discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1This is the nozzle structure diagram of the utility model;

[0021] Figure 2 This is a transverse cross-sectional view of the nozzle of the utility model;

[0022] Figure 3 This is a longitudinal sectional view of the nozzle of the utility model;

[0023] Figure 4 This is a schematic diagram of the nozzle structure when the utility model does not have an auxiliary nozzle;

[0024] Figure 5 This is an axonometric drawing of the spray gun of the utility model;

[0025] Figure 6 This is a bottom view of the spray gun of the utility model;

[0026] Figure 7 It is a cross-sectional view of the spray gun of the present utility model.

[0027] In the figure: 1. nozzle body; 2. liquid inlet; 3. liquid circuit; 4. valve needle mounting hole; 5. valve needle; 6. air connection port; 8. air hole; 9. inner nozzle; 10. valve needle cavity; 11. valve nozzle; 12. air outlet; 13. outer spray cap; 14. gas-liquid discharge port; 15. auxiliary nozzle; 16. auxiliary pipeline; 21. anti-slip pattern; 22. sealing ring; 31. spray gun body; 32. liquid pipe; 33. air pipe; 34. interface; 35. liquid circuit hose; 36. installation interface; 37. valve cavity; 38. valve core; 39. valve stem; 40. handle; 41. rotating rod; 42. hook; 43. rotating valve. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figure 1-4The utility model provides a technical solution: a nozzle, comprising: a nozzle body 1 which is cylindrical as a whole, a liquid inlet 2 is provided on the front surface of the nozzle body 1, a liquid path 3 is provided on the upper surface of the nozzle body 1, the liquid path 3 extends into the inside of the nozzle body 1 and is connected to the liquid inlet 2, a valve needle mounting hole 4 is provided at the bottom of the liquid path 3, a valve needle 5 is provided at the upper end of the nozzle body 1, the bottom end of the valve needle 5 is connected to the valve needle mounting hole 4 by a thread, the diameter of the valve needle 5 is smaller than the diameter of the liquid path 3, and the lower end of the nozzle body 1 is provided There is an air inlet 6, three air holes 8 are provided at the lower end of the nozzle body 1, the air holes 8 penetrate the nozzle body 1 upward, the air holes 8 are located at the periphery of the liquid path 3, the upper end of the valve needle 5 is sleeved with an inner nozzle 9, a conical valve needle cavity 10 is provided inside the inner nozzle 9, the upper end of the inner nozzle 9 is connected with a valve mouth 11, the left and right sides of the body of the inner nozzle 9 are provided with air outlet holes 12, the air outlet holes 12 are located at the periphery of the valve needle cavity 10, the lower end of the inner nozzle 9 is inserted and connected with the liquid path 3, and a spray cap assembly is provided at the upper end of the inner nozzle 9. When the spray cap assembly is pushed downward, the inner nozzle 9 will be driven to move downward, thereby reducing the distance between the valve needle 5 and the valve needle cavity 10, and the amount of liquid discharged will be reduced. When the spray cap assembly is pushed upward, the inner nozzle 9 will move upward with the outer spray cap 13, increasing the distance between the valve needle 5 and the valve needle cavity 10, thereby increasing the amount of liquid discharged.

[0030] like Figure 1-4 As shown, an embodiment of the utility model provides an implementation method. Based on the above implementation method, the spray cap assembly includes an outer spray cap 13 arranged at the upper end of the inner nozzle 9. The outer spray cap 13 is cylindrical as a whole and hollow inside. A gas-liquid discharge outlet 14 is opened at the upper end of the inner part of the outer spray cap 13.

[0031] From the analysis of the above structure, it can be seen that the gas will mix after entering the cavity at the upper end of the outer spray cap 13, and then the gas and liquid will be discharged together through the gas-liquid outlet 14. At this time, there is only the gas-liquid outlet 14 on the outer spray cap 13, and the upper end of the outer spray cap 13 is set to be an arc surface.

[0032] like Figure 1-3 As shown, an embodiment of the utility model provides an implementation method. Based on the above implementation method, auxiliary nozzles 15 are connected to the left and right sides of the upper end of the outer spray cap 13, and auxiliary pipes 16 are opened on the left and right sides inside the outer spray cap 13. The upper end of the auxiliary pipe 16 extends to the inside of the auxiliary nozzle 15.

[0033] From the analysis of the above structure, it can be known that when the gas and liquid enter the outer spray cap 13 to mix and are discharged from the gas-liquid outlet 14, a part of the gas is ejected from the auxiliary nozzle 15 through the auxiliary pipe 16, thereby forming a negative pressure inside the auxiliary pipe 16, drawing the liquid into the auxiliary nozzle 15 for discharge, and impacting the liquid path discharged from the gas-liquid outlet 14, making the ejected liquid fan-shaped.

[0034] like Figure 1-4 As shown, the embodiment of the utility model provides an implementation method. Based on the above implementation method, the outer spray cap 13 is connected to the nozzle body 1 through threads.

[0035] From the analysis of the above structure, it can be seen that when the outer spray cap 13 is pushed outward, a large error may occur. After changing to a threaded connection, when the outer spray cap 13 is rotated, it will move upward or downward, and the control of the distance is more precise.

[0036] like Figure 1-4 As shown, the embodiment of the utility model provides an implementation method. Based on the above implementation method, the outer surface of the lower end of the outer spray cap 13 is provided with anti-slip grooves 21 around it.

[0037] Analysis of the above structure shows that when the spray gun is used, the surface of the outer spray cap 13 is smooth and not easy to rotate, so an anti-skid pattern 21 is provided on the outer surface of the lower end of the outer spray cap 13 to prevent the outer spray cap 13 from slipping when twisted.

[0038] like Figure 1-4 As shown, the embodiment of the utility model provides an implementation method. Based on the above implementation method, a sealing ring 22 is provided around the outer surface of the lower end of the inner nozzle 9 and around the outer surface of the upper end of the nozzle body 1.

[0039] From the analysis of the above structure, it can be seen that the sealing ring 22 can improve the sealing degree of the connection between the nozzle body 1 and the outer spray cap 13, and the connection between the inner nozzle 9 and the nozzle body 1, prevent the gas from overflowing from the connection between the nozzle body 1 and the outer spray cap 13, and prevent the liquid and paint from overflowing from the connection between the inner nozzle 9 and the nozzle body 1.

[0040] See also Figure 1-7The utility model provides a technical solution: a spray gun using the nozzle, comprising: a spray gun body 31, a liquid pipe 32 is arranged inside the spray gun body 31, an air pipe 33 is arranged inside the spray gun body 31 and located on the right side of the inner side of the liquid pipe 32, interfaces 34 are arranged at both ends of the liquid pipe 32 and the air pipe 33, a liquid hose 35 is arranged at the right end of the interface 34 of the air pipe 33, and installation interfaces 36 are connected to both ends of the liquid hose 35, a valve cavity 37 is arranged at the upper end of the right surface of the spray gun body 31, a valve core 38 is arranged inside the valve cavity 37, a valve stem 39 is connected to the right side of the valve core 38, a handle 40 is arranged on the lower surface of the spray gun body 31 and located on the right side of the valve cavity 37, the upper end of the handle 40 is connected to the front and rear sides of the spray gun body 31 through a rotating shaft, a rotating rod 41 is inserted into the front end of the valve stem 39, and the rotating rod 41 is connected to the inner side of the handle 40, and the installation interface 36 is connected to the liquid inlet 2, and the air inlet 6 is connected to the interface 34 through threads.

[0041] like Figure 5-7 As shown, the embodiment of the utility model provides an implementation method. Based on the above implementation method, an L-shaped hook 42 is provided at the front end of the lower surface of the spray gun body 31.

[0042] From the analysis of the above structure, it can be known that after the spray gun is used, the spray gun body 31 can be hung on one side by the hook 42 for easy adjustment.

[0043] like Figure 5-7 As shown, the embodiment of the utility model provides an implementation method. Based on the above implementation method, a rotary valve 43 is connected to the lower surface of the spray gun body 31 and located at the rear side of the hook 42, and the upper end of the rotary valve 43 is connected to the inside of the air pipe 33.

[0044] From the analysis of the above structure, it can be known that by rotating the rotary valve 43, the ventilation volume of the air pipe 33 can be adjusted, which facilitates the adjustment of the air output volume.

[0045] When in use, the interface 34 at the lower end of the liquid tube 32 is connected to the liquid box, the interface 34 at the lower end of the air pipe 33 is connected to the air pump, the installation interface 36 of the liquid hose 35 is connected to the interface 34 of the liquid tube 32, and then the air inlet 6 is connected to the interface 34 at the front end of the air pipe 33, and the installation interface 36 is connected to the liquid inlet 2. When the handle 40 is pressed, the rotating rod 41 will push the valve stem 39, thereby pushing the valve core 38 inward, and the air hole on the valve core 38 will be connected to the air pipe 33, and the gas will enter the interior of the nozzle body 1 through the air pipe 33, and then pass through the nozzle body 1. The air hole 8 at the lower end of the nozzle body 1 enters the interior of the air outlet holes 12 on the left and right sides of the inner nozzle 9, and then enters the interior of the outer spray cap 13 through the air outlet holes 12. When the gas is discharged through the gas-liquid outlet 14, a negative pressure is formed inside the outer spray cap 13. The liquid is sucked out from the liquid box under the negative pressure and enters the interior of the liquid pipe 32. Then, it enters the interior of the liquid path 3 through the liquid path hose 35. After coming out of the liquid path 3, it will enter the interior of the inner nozzle 9, and then be discharged through the valve mouth 11. After entering the outer spray cap 13, the liquid and gas are mixed together and then discharged through the gas-liquid outlet 14.

[0046] When the hydraulic pressure needs to be adjusted, by rotating the outer spray cap 13, the outer spray cap 13 will drive the inner nozzle 9 to move up and down, thereby adjusting the distance between the valve needle cavity 10 inside the inner nozzle 9 and the valve needle 5. When the distance is large, the area inside the valve needle cavity 10 through which liquid can pass and discharge becomes larger, thereby increasing the amount of liquid discharged. Conversely, when the distance is small, the area inside the valve needle cavity 10 through which liquid can pass and discharge becomes smaller, thereby reducing the amount of liquid discharged.

[0047] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A nozzle, characterized in that: include: The nozzle body (1) is cylindrical in shape as a whole, a liquid inlet (2) is provided on the front surface of the nozzle body (1), a liquid path (3) is provided on the upper surface of the nozzle body (1), the liquid path (3) extends into the interior of the nozzle body (1) and is connected to the liquid inlet (2), a valve needle mounting hole (4) is provided at the bottom of the liquid path (3), a valve needle (5) is provided at the upper end of the nozzle body (1), the bottom end of the valve needle (5) is connected to the valve needle mounting hole (4) by a thread, the diameter of the valve needle (5) is smaller than the diameter of the liquid path (3), an air inlet (6) is provided at the lower end of the nozzle body (1), and the nozzle body (1) Three air holes (8) are provided at the lower end of the interior, the air holes (8) penetrate the nozzle body (1) upward, the air holes (8) are located on the periphery of the liquid path (3), the upper end of the valve needle (5) is sleeved with an inner nozzle (9), a conical valve needle cavity (10) is provided inside the inner nozzle (9), the upper end of the inner nozzle (9) is connected to a valve mouth (11), the left and right sides of the body of the inner nozzle (9) are provided with air outlet holes (12), the air outlet holes (12) are located on the periphery of the valve needle cavity (10), the lower end of the inner nozzle (9) is inserted and connected with the liquid path (3), and the upper end of the inner nozzle (9) is provided with a spray cap assembly.

2. A nozzle according to claim 1, characterized in that: The spray cap assembly comprises an outer spray cap (13) arranged at the upper end of the inner nozzle (9); the outer spray cap (13) is cylindrical in shape and hollow inside; a gas-liquid discharge port (14) is provided at the upper end of the inner part of the outer spray cap (13); and the upper end of the inner part of the outer spray cap (13) is connected to the inner nozzle (9) via a thread.

3. A nozzle according to claim 2, characterized in that: Auxiliary nozzles (15) are connected to the left and right sides of the upper end of the outer spray cap (13), and auxiliary pipes (16) are opened on the left and right sides inside the outer spray cap (13), and the upper ends of the auxiliary pipes (16) extend into the auxiliary nozzles (15).

4. A nozzle according to claim 2, characterized in that: The outer spray cap (13) is connected to the nozzle body (1) via threads.

5. A nozzle according to claim 2, characterized in that: The outer surface of the lower end of the outer spray cap (13) is provided with anti-slip grooves (21) around one circumference.

6. A nozzle according to claim 1, characterized in that: A sealing ring (22) is provided around the outer surface of the lower end of the inner nozzle (9) and around the outer surface of the upper end of the nozzle body (1).

7. A spray gun using the nozzle according to any one of claims 1 to 6, characterized in that: include: A spray gun body (31), wherein a liquid pipe (32) is arranged inside the spray gun body (31), an air pipe (33) is arranged inside the spray gun body (31) and on the right side of the inner side of the liquid pipe (32), interfaces (34) are arranged at both ends of the liquid pipe (32) and the air pipe (33), a liquid hose (35) is arranged at the right end of the interface (34) of the air pipe (33), and installation interfaces (36) are connected at both ends of the liquid hose (35), and a valve chamber (37) is arranged at the upper end of the right surface of the spray gun body (31), and the valve chamber (37) is arranged at the upper end of the right surface of the spray gun body (31). ) is provided with a valve core (38) inside, a valve stem (39) is connected to the right side of the valve core (38), a handle (40) is provided on the lower surface of the spray gun body (31) and located on the right side of the valve chamber (37), the upper end of the handle (40) is connected to the front and rear sides of the spray gun body (31) through a rotating shaft, a rotating rod (41) is inserted into the front end of the valve stem (39), and the rotating rod (41) is connected to the inner side of the handle (40), the installation interface (36) is connected to the liquid inlet (2), and the air inlet (6) is connected to the interface (34) through threads.

8. A spray gun according to claim 7, characterized in that: An L-shaped hook (42) is arranged at the front end of the lower surface of the spray gun body (31).

9. A spray gun according to claim 8, characterized in that: A rotary valve (43) is connected to the lower surface of the spray gun body (31) and is located at the rear side of the hook (42), and the upper end of the rotary valve (43) is connected to the inside of the air pipe (33).

Images