A spray gun

Abstract

This utility model discloses a spray gun, including a spray gun housing, an atomizing cap, a connecting seat, and a drive assembly. The spray gun housing has a material chamber inside, within which a needle is disposed. The spray gun housing also has a first air inlet channel, a second air inlet channel, a feeding channel, and a return channel, all of which are connected to the material chamber. The atomizing cap has a discharge port, which corresponds to the position of the needle. The connecting seat has a first air inlet, a second air inlet, a feeding port, and a return port. The first air inlet is connected to the first air inlet channel, and the second air inlet is connected to the second air inlet channel. The feeding channel and the return channel are respectively connected to a material cylinder via pipes. The slurry circulates between the feeding port, feeding channel, material chamber, return channel, return port, and material cylinder. This circulation of the slurry within the spray gun improves the fluidity of the glaze slurry and prevents it from solidifying inside the spray gun.

Description

Technical Field

[0001] This utility model relates to a spray gun and belongs to the technical field of spraying equipment. Background Technology

[0002] A spray gun is a device that uses the rapid release of liquid or compressed air as its power source. In various industries, spray guns can be used directly with paint, making them simple spray guns, or they can be installed in automated equipment such as automatic glue spraying machines, automatic adhesive applicators, automatic paint spraying machines, coating machines, and other spraying equipment.

[0003] Glaze is a colorless or colored vitreous thin layer applied to the surface of ceramic products. It is made by grinding mineral raw materials (feldspar, quartz, talc, kaolin, etc.) and other raw materials in a certain proportion (some raw materials can be made into frits first), forming a glaze slurry, which is then applied to the surface of the ceramic body and fired at a certain temperature. Glaze can increase the mechanical strength, thermal stability, and dielectric strength of the product, and also has the characteristics of beautifying the object, facilitating cleaning, and preventing corrosion from dust and dirt.

[0004] The glaze tends to solidify easily after the spray switch is turned off. Once solidified, it is quite hard. Existing spray gun glazes cannot circulate inside the spray gun, so the glaze slurry easily solidifies inside the spray gun. When spraying again is needed, the equipment needs to be cleaned, which is troublesome and can easily damage the spray gun. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a spray gun in which the slurry can circulate inside the spray gun and the slurry is not easy to solidify.

[0006] To achieve the aforementioned objectives, the technical solution adopted by this utility model includes:

[0007] A spray gun includes a spray gun housing, an atomizing cap, a connecting seat, and a drive assembly. The spray gun housing has a material chamber inside, and a needle is disposed within the material chamber, the needle moving relative to the material chamber. The spray gun housing also has a first air inlet channel, a second air inlet channel, a feeding channel, and a return channel, all of which communicate with the material chamber. The atomizing cap is disposed at one end of the spray gun housing and has a discharge port, which is at least used to spray out the slurry from the material chamber. The discharge port corresponds to the position of the needle, and the needle at least blocks the discharge port. The connecting seat is disposed at the end of the spray gun housing furthest from the atomizing cap. The connecting seat is provided with a first air inlet, a second air inlet, a feed inlet, and a return inlet. The first air inlet is connected to a first air intake channel, and gas enters the material chamber through the first air inlet and the first air intake channel to blow the slurry and form a mist-like particle. The second air inlet is connected to the second air intake channel, and gas enters the material chamber through the second air inlet and the second air intake channel to blow the slurry and form a fan-shaped spray. The feed channel and the return channel are respectively connected to the material cylinder through pipes, and the slurry circulates between the feed inlet, the feed channel, the material chamber, the return channel, the return inlet, and the material cylinder. The driving assembly is at least used to drive the gun needle to move relative to the material chamber to open or block the outlet.

[0008] Furthermore, the atomizing cap is provided with a nozzle, the nozzle is provided with a second spray hole, the atomizing cap is provided with an atomizing spray hole, the atomizing spray hole is at least used to spray the slurry into a mist; the second spray hole is at least used to spray the slurry into a fan shape.

[0009] Furthermore, the drive assembly includes a medium inlet, a medium channel, and a medium cavity. The medium channel is connected to the medium inlet and the medium cavity, respectively. A piston is disposed in the medium cavity and is connected to the gun needle. Under the drive of the medium, the piston moves in the medium cavity to drive the gun needle to move.

[0010] Furthermore, the drive assembly includes a gas inlet, a gas channel, and a gas chamber, the gas channel being connected to both the gas inlet and the gas chamber, and the piston being disposed within the gas chamber.

[0011] Furthermore, a connecting ring is provided between the connecting seat and the spray gun housing, and a placement groove is provided inside the connecting ring. An elastic component is provided inside the placement groove. One end of the elastic component is connected to the connecting ring, and the other end of the elastic component is connected to the piston. The elastic component is at least used to drive the piston to move towards the atomizing cap.

[0012] Furthermore, a first sealing component is provided inside the spray gun housing. The first sealing component is disposed on the outer surface of the gun needle, and the gun needle moves relative to the first sealing component. The first sealing component is at least used to prevent slurry from entering the medium cavity.

[0013] Furthermore, a second sealing assembly is provided inside the medium cavity, which is used at least to seal the medium cavity and prevent leakage of the medium inside the medium cavity.

[0014] Compared with the prior art, the advantages of this utility model include:

[0015] The present invention provides a spray gun in which the slurry circulates not only when the spray gun stops spraying, but also during the spraying process, which improves the fluidity of the slurry and prevents it from solidifying inside the spray gun. Compared with traditional spray guns, this application saves time for cleaning equipment, saves slurry, and extends the service life of the spray gun.

[0016] The present invention provides a spray gun in which the first sealing component and the second sealing component can prevent the needle from carrying material into other cavities inside the spray gun housing during the movement of the needle, and prevent the needle from getting stuck after the material solidifies. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a front view of a spray gun provided in a typical embodiment of this utility model;

[0019] Figure 2 This is a left view of a spray gun provided in a typical embodiment of this utility model;

[0020] Figure 3 This is a cross-sectional view of a spray gun provided in a typical embodiment of this utility model;

[0021] Explanation of reference numerals in the attached drawings: 1. Spray gun housing; 2. Material chamber; 3. Gun needle; 6. Feed channel; 8. Atomizing cap; 9. Discharge port; 10. Connecting seat; 11. First air inlet; 12. Second air inlet; 13. Feed inlet; 14. Return port; 15. Nozzle; 16. Second spray hole; 17. Atomizing spray hole; 18. Medium inlet; 20. Medium chamber; 21. Connecting ring; 22. Placement groove; 23. Elastic component; 24. First sealing assembly; 25. Second sealing assembly; 26. Piston. Detailed Implementation

[0022] In view of the shortcomings of the prior art, the inventor of this case, through long-term research and extensive practice, has come up with the technical solution of this utility model. The following will further explain the technical solution, its implementation process, and its principles.

[0023] like Figure 1 , Figure 2 , Figure 3 As shown, this utility model discloses a spray gun, including a spray gun housing 1, an atomizing cap 8, a connecting seat 10 and a driving assembly. The spray gun housing 1 has a material chamber 2 inside, and a gun needle 3 is disposed in the material chamber 2. The gun needle 3 moves relative to the material chamber 2.

[0024] The spray gun housing 1 is provided with a first air intake channel, a second air intake channel, a feeding channel 6 and a return channel, and the first air intake channel, the second air intake channel, the feeding channel 6 and the return channel are all connected to the material chamber 2.

[0025] The atomizing cap 8 is disposed at one end of the spray gun housing 1. The atomizing cap 8 has a discharge port 9, which is used at least to spray the slurry from the feeding chamber 2. The discharge port 9 corresponds to the position of the gun needle 3, which is used at least to block the discharge port 9. Specifically, the atomizing cap 8 has a nozzle 15, which has a second spray hole 16, used at least to spray the slurry into a fan shape. The atomizing cap 8 also has an atomizing spray hole 17, used at least to spray the slurry into a mist. There is a gap between the discharge port 9 and the atomizing cap 8, allowing the slurry to also become a spray under the influence of gas.

[0026] like Figure 2As shown, the connecting seat 10 is located at the end of the spray gun housing 1 away from the atomizing cap 8. The connecting seat 10 is provided with a first air inlet 11, a second air inlet 12, a feed inlet 13, and a return inlet 14. The first air inlet 11 is connected to the first air intake channel, and gas enters the material chamber 2 through the first air inlet 11 and the first air intake channel to blow the slurry and form a mist of slurry particles. The second air inlet 12 is connected to the second air intake channel, and gas enters the material chamber 2 through the second air inlet 12 and the second air intake channel to blow the slurry and form a fan-shaped spray of slurry. The feed channel 6 and the return channel are respectively connected to the material cylinder through pipes. The slurry passes through the feed inlet 13, feed channel 6, material chamber 2, return channel, and return inlet. 14 Circulates between the feed inlet 13, feed channel 6, material chamber 2, return channel, return inlet 14, and the material cylinder; In this embodiment, the slurry is a glaze slurry, which continuously circulates within the spray gun between the feed inlet 13, feed channel 6, material chamber 2, return channel, return inlet 14, and the material cylinder, making the glaze slurry less prone to solidification. In this application, the glaze slurry circulates not only when the spray gun stops spraying, but also during the spraying process (in this embodiment, the material sprayed out by the spray gun is about 5%-10% of the feed, so the returned material is about 90%-95%, and the material in the material cylinder is also constantly stirred), making the glaze slurry more fluid and preventing it from solidifying within the spray gun; Compared with traditional spray guns, this application saves time on cleaning equipment, saves glaze slurry, and extends the service life of the spray gun.

[0027] The driving assembly is at least used to drive the gun needle 3 to move relative to the material chamber 2, so as to open or block the discharge port 9. Specifically, the driving assembly includes a medium inlet 18, a medium channel, and a medium chamber 20. The medium channel is connected to the medium inlet 18 and the medium chamber 20 respectively. A piston 26 is provided in the medium chamber 20. The piston 26 is connected to the gun needle 3. Driven by the medium, the piston 26 moves in the medium chamber 20 to drive the gun needle 3 to move. The medium introduced into the medium inlet 18 can be gas or slurry. In this embodiment, the medium introduced into the medium inlet 18 is air. Specifically, the driving assembly includes a gas inlet, a gas channel, and a gas chamber. The gas channel is connected to the gas inlet and the gas chamber respectively. The gas inlet is provided on the connecting seat 10. The gas channel and the gas chamber are both provided inside the spray gun housing 1. The piston 26 is provided in the gas chamber, and the piston 26 moves in the gas chamber to drive the gun needle 3 to move towards or away from the discharge port 9.

[0028] Based on the above, a connecting ring 21 is provided between the connecting seat 10 and the spray gun housing 1. A placement groove 22 is provided within the connecting ring 21, and an elastic component 23 is provided within the placement groove 22. The elastic component 23 can be a spring or a sheet spring, as long as it can drive the piston 26 to move closer to the discharge port 9 and reset without external force driving the piston 26 to move away from the discharge port 9. In this embodiment, the elastic component 23 includes a spring. One end of the spring is connected to the connecting ring 21, and the other end of the spring is connected to the piston 26. The spring is used to drive the piston 26 to move closer to the atomizing cap 8.

[0029] During operation, when the spray gun needs to work, i.e., when the needle 3 needs to move away from the outlet 9, gas enters from the gas inlet and passes through the gas channel into the gas chamber under the control of the control valve. Driven by the gas, the piston 26 moves away from the outlet 9, and at the same time, the piston 26 drives the needle 3 to move away from the outlet 9. At this time, the needle 3 does not block the outlet 9, and the glaze slurry can be sprayed out from the outlet 9. When the spray gun does not need to spray, the gas in the chamber is discharged under the control of the control valve (of course, an exhaust port is also provided in this application). Under the elastic force of the spring, the piston 26 moves towards the outlet 9, thereby driving the needle 3 to move towards the outlet 9 until the needle 3 blocks the outlet 9. At this time, the spray gun does not spray slurry.

[0030] Since the needle 3 moves inside the housing, it will move the material during the movement. If the seal is not good, the material will move into other cavities inside the needle 3 housing. If the material does not flow for a long time, it will harden, resulting in the needle 3 getting stuck. To solve this technical problem, a first sealing component 24 is provided inside the spray gun housing 1. The first sealing component 24 is provided on the outer surface of the needle 3, and the needle 3 moves relative to the first sealing component 24. The first sealing component 24 is at least used to prevent the slurry from entering the medium cavity 20.

[0031] Based on the above, in order to further improve the sealing performance, a second sealing component 25 is provided in the medium cavity 20. The second sealing component 25 is used to seal the medium cavity 20 at least to prevent the medium in the medium cavity 20 from leaking.

[0032] It should be understood that the above embodiments are merely illustrative of the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A spray gun characterized by: include The spray gun housing has a material chamber inside, and a gun needle is disposed inside the material chamber. The gun needle moves relative to the material chamber. The spray gun housing has a first air inlet channel, a second air inlet channel, a feeding channel, and a return channel. The first air inlet channel, the second air inlet channel, the feeding channel, and the return channel are all connected to the material chamber. An atomizing cap is disposed at one end of the spray gun housing, and the atomizing cap is provided with a discharge port, which is at least used for spraying out the slurry in the feeding chamber; the discharge port corresponds to the position of the gun needle, and the gun needle is at least used to block the discharge port; A connecting seat is located at the end of the spray gun housing furthest from the atomizing cap. The connecting seat is provided with a first air inlet, a second air inlet, a feed inlet, and a return inlet. The first air inlet is connected to a first air intake channel, through which gas enters the material chamber to agitate the slurry and form a mist-like particle. The second air inlet is connected to a second air intake channel, through which gas enters the material chamber to agitate the slurry and form a fan-shaped spray. The feed channel and the return channel are respectively connected to the material cylinder via pipes, and the slurry circulates between the feed inlet, the feed channel, the material chamber, the return channel, the return inlet, and the material cylinder. A drive assembly, which is at least used to drive the gun needle to move relative to the material chamber in order to open or block the discharge port.

2. A lance according to claim 1, characterized in that: The atomizing cap is provided with a nozzle, the nozzle is provided with a second spray hole, and the atomizing cap is provided with an atomizing spray hole. The atomizing spray hole is at least used to spray the slurry into a mist; the second spray hole is at least used to spray the slurry into a fan shape.

3. A lance according to claim 1, characterized in that: The drive assembly includes a medium inlet, a medium channel, and a medium cavity. The medium channel is connected to the medium inlet and the medium cavity, respectively. A piston is disposed in the medium cavity and is connected to the gun needle. Under the drive of the medium, the piston moves in the medium cavity to drive the gun needle to move.

4. A lance according to claim 3, characterized in that: The drive assembly includes a gas inlet, a gas channel, and a gas chamber. The gas channel is connected to both the gas inlet and the gas chamber, and the piston is disposed within the gas chamber.

5. A lance according to claim 3, characterized in that: A connecting ring is provided between the connecting seat and the spray gun housing. A placement groove is provided inside the connecting ring. An elastic component is provided inside the placement groove. One end of the elastic component is connected to the connecting ring, and the other end of the elastic component is connected to the piston. The elastic component is at least used to drive the piston to move towards the atomizing cap.

6. A lance according to claim 1, characterized in that: The spray gun housing is provided with a first sealing component, which is disposed on the outer surface of the gun needle. The gun needle moves relative to the first sealing component. The first sealing component is at least used to prevent slurry from entering the medium cavity.

7. A lance according to claim 3, characterized in that: A second sealing assembly is provided inside the medium cavity. The second sealing assembly is used to seal the medium cavity and prevent the medium from leaking out of the medium cavity.

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