A spray gun

Abstract

The utility model discloses a spray gun, aims at providing a spray gun that high spraying efficiency, strong uniformity, its technical scheme main points are including gun body and set up in the air inlet channel and the discharge channel of gun body, the handle of gun body is equipped with air inlet component and trigger switch, still be equipped with spray material subassembly, hollow gun needle spare and adjusting assembly in the gun body, spray material subassembly includes setting in the spray nozzle of gun body head, the feed connector of being located in the side of gun body head, the recessed ring of setting in the spray nozzle, the auxiliary air inlet hole of being located in the gun body head and the discharge amount adjusting rod of setting in the gun body, the recessed ring is matched with the auxiliary air inlet hole, makes gas spread all around, and the pressure uniformity of paint spraying is exported. The utility model is applicable to the technical field of spray gun.

Description

Technical Field

[0001] This utility model relates to the field of spray gun technology, and more specifically, to a spray gun. Background Technology

[0002] Traditional spray guns have significant shortcomings in terms of coating uniformity and atomization. Due to limitations in structural design and technology, the paint is difficult to disperse ideally during spraying, potentially leading to uneven thickness and noticeable graininess on the coated surface. In industries with high surface quality requirements, such as automotive painting and precision instrument coating, traditional spray guns cannot meet the demands for high-quality coating. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a spray gun with high spraying efficiency and strong uniformity.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a spray gun, comprising a gun body and an air inlet channel and a material outlet channel disposed within the gun body. The handle of the gun body is provided with an air inlet assembly and a trigger switch. The gun body is also provided with a spraying assembly, a hollow needle, and an adjustment assembly. The spraying assembly includes a nozzle disposed at the head of the gun body, a material inlet connector located on the side of the head of the gun body, a groove ring disposed within the nozzle, an auxiliary air inlet located within the head of the gun body, and a material outlet adjustment rod disposed within the gun body. The cooperation between the groove ring and the auxiliary air inlet ensures that the gas is distributed throughout the surrounding area, and the paint is sprayed out under uniform pressure.

[0005] The present invention is further configured such that: the air intake assembly includes an air intake interface, an air pressure regulating needle, and an adjustment switch for controlling the air pressure regulating needle.

[0006] The present invention is further configured such that: the discharge channel is provided with a spiral guide structure, the spiral guide structure including raised guide plates and recessed guide grooves arranged alternately in the discharge channel.

[0007] The present invention is further configured such that: the grip of the gun body is also provided with an air valve body, an air valve needle and an elastic element adapted to the trigger; the trigger acts on the air valve body and then transmits the force to the air valve needle; the air valve needle causes the elastic element to deform and generate elastic force, and opens the air passage to allow gas to flow in.

[0008] The present invention is further configured such that: the inlet end of the air intake channel is provided with a conical guide shroud, the cone angle of which is 60°-90°.

[0009] The present invention is further provided with a hook at the top of the gun body.

[0010] The beneficial effects of this utility model are:

[0011] 1. The spray gun integrates the air intake assembly and trigger switch at the handle. Operators can easily control the start and stop of the spray gun by naturally gripping the handle and operating the trigger switch, while also facilitating adjustment of the air intake assembly to control the air volume. The various components of the spraying assembly, such as the nozzle, feed connector, grooved ring, auxiliary air inlet, and discharge adjustment rod, are tightly integrated into the gun head and interior, resulting in a more compact structure, fewer external connecting parts, reduced risk of paint leakage, and improved overall stability and reliability. Furthermore, the coordinated operation of these components is more efficient, enabling more precise paint application. The clever combination of the grooved ring and auxiliary air inlet ensures that the gas ejected from the auxiliary air inlet is evenly distributed around the nozzle during operation. When the paint is sprayed from the nozzle, the uniform air pressure acts on the paint, effectively preventing uneven pressure distribution during spraying. This results in more uniform atomization and dispersion of the paint, significantly improving the quality of the spray.

[0012] 2. The air pressure regulating needle and switch in the air intake assembly provide high flexibility and precision in air pressure control of the spray gun. Different spraying tasks and paint types have different air pressure requirements. Through the regulating switch, the operator can easily control the position of the air pressure regulating needle, thereby precisely adjusting the air pressure entering the gun body through the air intake interface. When spraying high-viscosity paints, higher air pressure is required to ensure that the paint can be sprayed out smoothly and achieve a good atomization effect; while for fine spraying, lower and more stable air pressure is required. The spiral guide structure formed by the alternating raised guide vanes and recessed guide grooves in the discharge channel can generate strong turbulence in the paint during the flow process. When the paint flows through the raised guide vanes, it is divided and dispersed; while in the recessed guide grooves, the paint will re-gather and mix. The repeated division and mixing process allows the various components in the paint to be more evenly distributed, avoiding the phenomenon of paint stratification or sedimentation.

[0013] 3. The coordinated action of the trigger, valve body, valve needle, and elastic element ensures highly consistent operation of the spray gun. When the operator pulls the trigger, the force is smoothly transmitted from the trigger to the valve body, and then from the valve body to the valve needle. When the trigger is released, the valve needle returns to its original position under the action of the elastic element, closing the air passage. The operator can open the air passage with a simple trigger pull, without the need for complex multi-step adjustments. For work scenarios that require frequent start-stop of the spray gun, such as fine pattern spraying or small-area repair work, this convenient operation method can greatly improve work efficiency and reduce operator fatigue.

[0014] 4. The conical guide vane at the inlet of the air intake channel, with a specific cone angle range of 60°-90°, significantly improves air intake efficiency. When gas enters the air intake channel, the conical guide vane guides and converges it. The cone angle design allows the gas to concentrate more smoothly towards the center upon entering the inlet, reducing gas diffusion and turbulence. Compared to designs without a guide vane or with an unsuitable cone angle, this structure allows more gas to enter the air intake channel quickly and stably, providing sufficient air pressure for the spray gun. This ensures that the spray gun can continuously and stably spray paint during operation, improving the quality and efficiency of spraying. The hook at the top of the gun body provides great convenience for storing and hanging the spray gun. When not in use, the spray gun can be hung in a suitable location, such as a tool rack or wall hook. This not only saves storage space but also keeps the spray guns neatly arranged, preventing damage or loss due to random placement. Attached Figure Description

[0015] Figure 1 This is a partial three-dimensional structural schematic diagram of the present invention;

[0016] Figure 2 This is a cross-sectional view of the present invention;

[0017] Figure 1-2 Reference numerals: 1. Gun body; 2. Air outlet channel; 3. Material outlet channel; 4. Handle; 5. Trigger switch; 6. Nozzle; 7. Feed connector; 8. Groove ring; 9. Auxiliary air inlet; 10. Material output adjustment rod; 11. Air inlet; 12. Air pressure adjustment needle; 13. Adjustment switch; 14. Air valve body; 15. Air valve needle; 16. Elastic element; 17. Hook; 18. Air inlet channel; 19. Gun needle. Detailed Implementation

[0018] Reference Figures 1 to 2 The embodiments of this utility model will be further described below.

[0019] For ease of explanation, spatial relative terms such as “up,” “down,” “left,” and “right” are used in the embodiments to describe the relationship of one element or feature shown in the figures relative to another element or feature. It should be understood that, in addition to the orientations shown in the figures, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figures is inverted, an element described as being “down” of other elements or features would be positioned “up” of those other elements or features. Therefore, the exemplary term “down” can encompass both up and down orientations. The device may be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0020] Moreover, relational terms such as “first” and “second” are used merely to distinguish one component from another that has the same name, without necessarily requiring or implying any such actual relationship or order between the components.

[0021] Figures 1 to 2 The spray gun shown includes a gun body 1 and an air inlet channel 18 and a discharge channel 3 disposed within the gun body 1. The handle 4 of the gun body 1 is provided with an air inlet component and a trigger switch 5. When the operator uses the spray gun, the hand naturally holds the handle 4, and can easily operate the trigger switch 5 to control the start and stop of the spray gun. At the same time, it is convenient to adjust the air inlet component to control the air intake. The gun body 1 is also equipped with a spraying assembly, a hollow needle 19, and an adjustment assembly. The adjustment assembly and the trigger switch 5 cooperate to drive the needle 19 to move axially, thereby causing the needle 19 to switch between a first state and a second state. When the needle 19 is in the first state, one end of the needle and the air outlet 2 are not connected to the air inlet 18, and the other end of the needle 19 and the discharge channel 3 are not connected to the paint connector. When the needle 19 is in the second state, one end of the needle and the air outlet 2 are connected to the air inlet 18, and the other end of the needle 19 is connected to the paint connector and the discharge channel 3. The spraying assembly includes a nozzle 6 located at the head of the gun body 1, a feed connector 7 located on the side of the head of the gun body 1, a groove ring 8 located within the nozzle 6, an auxiliary air outlet located within the head of the gun body 1, and a discharge rate adjustment rod 10 located within the gun body 1. These components are tightly integrated into the head and interior of the gun body 1, making the spray gun structure more compact, reducing external connecting parts, lowering the risk of paint leakage, and improving the overall stability and reliability of the spray gun. Simultaneously, the coordinated operation between the various components is more efficient, enabling better precision spraying of the paint. The operator simply needs to gently pinch the knob of the discharge rate adjustment rod 10 with their fingers and rotate it clockwise or counterclockwise. The magnitude of the rotation directly corresponds to the change in discharge rate. When it is necessary to increase the discharge rate, rotating the knob clockwise gradually opens the valve of the discharge channel 3 or changes the cross-sectional area of ​​the channel, allowing more paint to smoothly pass through the discharge channel 3 and reach the nozzle 6. Conversely, to reduce the discharge rate, rotating the knob counterclockwise gradually closes the valve or reduces the cross-sectional area of ​​the channel, thereby limiting the flow of paint. The grooved ring 8, in conjunction with the auxiliary air outlet, allows the gas ejected from the auxiliary air outlet to be guided and dispersed evenly around the nozzle 6 during spray gun operation. When the paint is sprayed from the nozzle 6, the uniform air pressure from all sides acts on the paint, ensuring that the paint is subjected to uniform pressure. This effectively avoids uneven local pressure during the spraying process, allowing the paint to be atomized and dispersed more evenly, thus greatly improving the quality of the spraying.

[0022] The air intake assembly includes an air intake port 11, an air pressure regulating needle 12, and an adjustment switch 13 for controlling the air pressure regulating needle 12. The air pressure regulating needle 12 and the adjustment switch 13 in the air intake assembly provide high flexibility and precision for the air pressure control of the spray gun. Different spraying tasks and paint types have different requirements for air pressure. Through the adjustment switch 13, the operator can easily control the position of the air pressure regulating needle 12, thereby accurately adjusting the air pressure entering the gun body 1 through the air intake port 11. When spraying high-viscosity paint, a higher air pressure is required to ensure that the paint can be sprayed out smoothly and achieve a good atomization effect; while when performing fine spraying, a lower and more stable air pressure is required.

[0023] The discharge channel 3 is equipped with a spiral guide structure, which includes raised guide plates and recessed guide grooves arranged alternately inside the discharge channel 3. This structure can generate strong disturbances in the coating during the flow process. When the coating flows through the raised guide plates, it will be divided and dispersed; while in the recessed guide grooves, the coating will re-aggregate and mix. The repeated division and mixing process allows the various components in the coating to be more evenly distributed, avoiding the phenomenon of coating stratification or sedimentation.

[0024] The gun body 1 also features a valve body 14, a valve needle 15, and an elastic element 16 at the handle 4, all adapted to the trigger. This design ensures highly consistent operation of the spray gun. When the operator pulls the trigger, the force is smoothly transmitted from the trigger to the valve body 14, and then from the valve body 14 to the valve needle 15. When the trigger is released, the valve needle 15 returns to its original position under the action of the elastic element, closing the air passage. The operator can open the air passage with a simple trigger pull, eliminating the need for complex multi-step adjustments. For work scenarios requiring frequent start-stop of the spray gun, such as fine pattern spraying or small-area repair work, this convenient operation method can greatly improve work efficiency and reduce operator fatigue.

[0025] The inlet end of the air intake channel 18 is equipped with a conical guide shroud with an optimal cone angle of 60°-90°, which significantly improves air intake efficiency. When gas enters the air intake channel 18, the conical guide shroud guides and converges the gas. The cone angle design allows the gas to concentrate more smoothly towards the center upon entering the inlet, reducing gas diffusion and turbulence. Compared to designs without a guide shroud or with an unsuitable cone angle, this structure allows more gas to enter the air intake channel 18 quickly and stably, providing sufficient air pressure for the spray gun. This ensures that the spray gun can continuously and stably spray paint during operation, improving the quality and efficiency of spraying. When the cone angle is less than 60°, the opening of the conical guide shroud is relatively narrow. When the gas enters the air intake channel 18, the channel contracts too drastically, resulting in a significant slowdown in the air intake speed. During operation, the spray gun will not be able to fully atomize the paint due to the unsmooth air intake and insufficient air pressure supply. When the cone angle is greater than 90°, the opening of the conical guide shroud becomes too wide. This will prevent the gas entering the guide shroud from effectively converging and instead disperse to the surroundings. The gas cannot enter the air intake channel 18 in a concentrated manner, resulting in a reduction in the amount of gas entering the channel and unstable air pressure. This will cause the paint to spray out unstably during the spraying process, resulting in intermittent spraying.

[0026] The top of the gun body 1 is also equipped with a hook 17, which greatly facilitates the storage and hanging of the spray gun. When the spray gun is not in use, it can be hung in a suitable location, such as a tool rack or a wall hook 17, using the hook 17. This not only saves storage space but also keeps the spray guns neatly arranged, preventing damage or loss caused by random placement. The above description is only a preferred embodiment of this utility model and is not intended to limit the utility model. Common variations and substitutions made by those skilled in the art within the scope of the technical solution of this utility model should be included within the protection scope of this utility model.

Claims

1. A spray gun, comprising a gun body (1) and an air inlet channel (18), an air outlet channel (2), and a material outlet channel (3) disposed within the gun body (1), characterized in that, The gun body (1) is provided with an air intake assembly and a trigger switch (5) at the handle (4). The gun body (1) is also provided with a spray assembly, a hollow gun needle (19) and an adjustment assembly. The spray assembly includes a nozzle (6) located at the head of the gun body (1), a feed connector (7) located on the side of the head of the gun body (1), a groove ring (8) located in the nozzle (6), an auxiliary air intake hole (9) located in the head of the gun body (1), and a discharge volume adjustment rod (10) located in the gun body (1). The cooperation between the groove ring (8) and the auxiliary air intake hole (9) makes the gas spread around, and the paint is sprayed out under pressure evenly.

2. A spray gun according to claim 1, characterized in that, The air intake assembly includes an air intake port (11), a pressure regulating needle (12), and a regulating switch (13) for controlling the pressure regulating needle (12).

3. A spray gun according to claim 1, characterized in that, The discharge channel (3) is provided with a spiral guide structure, which includes raised guide plates and recessed guide grooves arranged alternately in the discharge channel (3).

4. A spray gun according to claim 1, characterized in that, The gun body (1) is also provided with a gas valve body (14), a gas valve needle (15) and an elastic element (16) adapted to the trigger at the grip (4). The trigger acts on the gas valve body (14) and then transmits the force to the gas valve needle (15). The gas valve needle (15) causes the elastic element (16) to deform and generate elastic force, and opens the air passage to allow gas to flow in.

5. A spray gun according to claim 1, characterized in that, The air intake channel (18) is provided with a conical air guide at the inlet end, with a cone angle of 60°-90°.

6. A spray gun according to claim 1, characterized in that, The gun body (1) is also provided with a hook (17) at the top.

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