A spray gun atomization adjustment control device

Abstract

The application discloses a spray gun atomization adjusting control device which is arranged at the air outlet end of a spray gun body and comprises a fixing nut, a cap assembly, a nozzle assembly and a control member. The fixing nut is fixedly connected with the air outlet end of the spray gun body, and a containing space is formed between the fixing nut and the spray gun body. The cap assembly is provided with a floating through air ring and an atomizing cap body, and the floating through air ring and the atomizing cap body are sequentially arranged along the air flow direction. The floating through air ring and the atomizing cap body are axially and floatingly connected. The nozzle assembly is sequentially arranged in the containing space along the air flow direction. The control member is provided with a rotatable amplitude adjusting knob. When the amplitude adjusting knob is rotated in a first direction, the atomizing cap body moves towards the floating through air ring. When the amplitude adjusting knob is rotated in a second direction, the atomizing cap body moves away from the floating through air ring. The first direction is opposite to the second direction. The application has stable and reliable spraying effect, is convenient to control and has strong controllability.

Description

Technical Field

[0001] This invention relates to the field of spraying equipment technology, and in particular to a spray gun atomization adjustment and control device. Background Technology

[0002] A spray gun is a coating device that atomizes liquid and then sprays it onto the object to be coated, obtaining a uniform and aesthetically pleasing coating. In existing technologies, some spray guns allow users to adjust the width of the sprayed surface (i.e., the spraying area) to meet actual production needs. For example, the "slit nozzle" disclosed in Chinese Patent (application number 201080045648.0) and the "a spray gun head" disclosed in Chinese Patent (application number 201620336015.X) both operate on the principle of using an airflow adjustment ring. During operation, moving the ring adjusts the airflow rate, thereby changing the width of the sprayed surface. However, this adjustment method has a drawback: because adjusting the sprayed surface width changes the airflow rate, the output airflow of the spray gun is affected, resulting in unstable spraying effects. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings and deficiencies of existing technologies by providing a spray gun atomization adjustment and control device. This device has a simple and reasonable structure, is easy to operate, has strong controllability, and stable and reliable performance, which can effectively improve the spraying effect.

[0004] To achieve the above objectives, the present invention adopts the following technical solution.

[0005] A spray gun atomization adjustment and control device, disposed at the air outlet end of the spray gun body, includes:

[0006] A fixing nut is fixedly connected to the air outlet end of the gun body, and an accommodating space is formed between the fixing nut and the gun body;

[0007] A nozzle assembly is disposed within the accommodating space. The nozzle assembly includes an air door plate and a nozzle for supplying liquid. The nozzle is fixed to the center of the air door plate and is matched with the spray needle of the gun body. An air door plate air channel is formed between the air door plate and the nozzle, and the air door plate air channel is connected to the air duct inside the gun body.

[0008] A hood assembly is disposed within the accommodating space. The hood assembly has a through hole at its center for inserting the nozzle. The hood assembly also has a hood air channel. Both the through hole and the hood air channel are connected to the door panel air channel. The discharge end of the nozzle extends into the air outlet end of the through hole.

[0009] It also includes a control component for driving the nozzle assembly and the wind cap assembly to move relative to each other within the accommodating space, so as to adjust the relative position of the discharge end face of the nozzle and the air outlet end face of the through hole in the axial direction of the accommodating space.

[0010] Furthermore, the outer periphery of the air door panel is securely pressed between the gun body and the fixing nut.

[0011] Furthermore, the outer periphery of the air door panel is provided with a plurality of door panel protrusions extending radially, and the gun body is provided with a plurality of gun body slots corresponding one-to-one with the door panel protrusions.

[0012] Furthermore, the wind cap assembly includes a floating through-air ring, an elastic element, and an atomizing wind cap body arranged sequentially along the airflow direction. The floating through-air ring abuts against the air door panel, and the floating through-air ring and the atomizing wind cap body are axially floatingly connected. The elastic element abuts between the floating through-air ring and the atomizing wind cap body, and the control component is linked and cooperates with the atomizing wind cap body. The floating through-air ring and the atomizing wind cap body cooperate to form the through hole and the wind cap air channel.

[0013] Furthermore, the outer periphery of the floating through-hole wind ring is provided with several wind ring locking protrusions, and the inner wall of the atomizing wind cap body is provided with several sliding grooves that correspond one-to-one with the wind ring locking protrusions. The inlet end of the sliding groove is provided with a wind cap locking protrusion that cooperates with the wind ring locking protrusion to prevent disengagement.

[0014] Furthermore, the hood assembly is rotatably disposed within the accommodating space, and the hood air channel includes a flat-formed air channel and a circular auxiliary-formed air channel that are isolated from each other; when the hood assembly is rotated, the flat-formed air channel and the circular auxiliary-formed air channel can be switched to communicate with the door panel air channel;

[0015] A pair of side air outlet blocks are symmetrically arranged at the end of the atomizing wind cap body away from the floating through-air ring. The end face of the side air outlet blocks is provided with flat-formed air holes that communicate with the flat-formed air channel. At the end of the atomizing wind cap body away from the floating through-air ring, a number of circular auxiliary forming air holes that communicate with the circular auxiliary forming air channel are also provided. The flat-formed air holes and the circular auxiliary forming air holes are all arranged corresponding to the through holes.

[0016] Furthermore, the side air outlet block end face is also provided with a flat auxiliary forming air hole that communicates with the flat forming air channel, and the flat auxiliary forming air hole located on the same side air outlet block is correspondingly provided with the flat forming air hole.

[0017] Furthermore, the control component includes an amplitude adjustment block rotatably disposed between the atomizing wind cap body and the fixing nut. When the amplitude adjustment block is rotated, the amplitude adjustment block cooperates with the elastic element to drive the atomizing wind cap body to move axially relative to the floating through wind ring.

[0018] Furthermore, the amplitude adjustment block has a block pre-compression plane at one end near the atomizing hood body, and the corresponding end face of the atomizing hood body has a hood pre-compression plane that abuts against the block pre-compression plane; the amplitude adjustment block has a block climbing slope extending circumferentially at one end away from the atomizing hood body, and the corresponding end face of the fixing nut has a nut climbing slope that abuts against the block climbing slope.

[0019] The beneficial effects of the present invention are as follows: The spray gun atomization adjustment and control device provided by the present invention, by movably arranging the nozzle assembly and the air cap assembly in the accommodating space formed by the gun body and the fixing nut, and configuring corresponding control components, drives the nozzle assembly and the air cap assembly to move relative to each other in the accommodating space, thereby adjusting the relative position of the nozzle's discharge end face and the air outlet end face of the air cap assembly's through hole in the axial direction of the accommodating space, thereby enabling the change of the spraying surface width during use.

[0020] Compared with existing technologies, this invention does not require changes to the airflow of the spray gun during operation, thus not affecting the output airflow of the spray gun and ensuring stable and reliable spraying results. This invention has a simple and reasonable structure, is easy to operate, and offers strong controllability. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall exploded structure of the present invention.

[0022] Figure 2 This is a schematic diagram of the fixing nut structure of the present invention.

[0023] Figure 3 This is a schematic diagram of the nozzle assembly structure of the present invention.

[0024] Figure 4 This is a schematic diagram of the wind cap assembly structure of the present invention.

[0025] Figure 5 This is a schematic diagram of the wind cap assembly structure of the present invention.

[0026] Figure 6 This is a schematic diagram of the main structure of the atomizing wind cap of the present invention.

[0027] Figure 7 This is a schematic diagram of the amplitude modulation block structure of the present invention.

[0028] Figure 8This is a schematic diagram of the amplitude modulation block of the present invention in one position state.

[0029] Figure 9 This invention is in Figure 8 The diagram shows the structure of the atomizing cap assembly in the indicated state.

[0030] Figure 10 This invention is in Figure 8 The diagram shows the width of the sprayed surface in the indicated state.

[0031] Figure 11 yes Figure 10 A magnified structural diagram of point Q.

[0032] Figure 12 This is a schematic diagram of the amplitude modulation block of the present invention in another positional state.

[0033] Figure 13 This invention is in Figure 12 The diagram shows the structure of the atomizing cap assembly in the indicated state.

[0034] Figure 14 This invention is in Figure 12 The diagram shows the width of the sprayed surface in the indicated state.

[0035] Figure 15 yes Figure 14 A magnified structural diagram at point S in the middle.

[0036] Figure 1-15 In the middle: 1. Gun body; 11. Gun body slot; 12. Spray needle; 2. Fixing nut; 21. Nut ramp; 31. Air door panel; 311. Door panel boss; 312. Door panel main air channel; 313. Door panel auxiliary forming air channel; 32. Nozzle; 321. Nozzle end face; 33. Connecting bridge plate; 41. Floating through-air ring; 411. Air ring locking protrusion; 42. Elastic element; 43. Atomizing air cap body; 431. Slide groove; 432. Air cap locking protrusion; 433. Side air outlet block; 434. Flat forming air hole; 435. Flat auxiliary forming air hole; 436. Circular auxiliary forming air hole; 437. Air cap pre-compression plane; 438. Atomizing air cap body end face; 451. Flat forming air channel; 452. Flat auxiliary forming air channel; 5. Amplitude adjustment block; 51. Block pre-compression plane; 52. Block ramp. Detailed Implementation

[0037] The invention will now be further described with reference to the accompanying drawings.

[0038] like Figures 1 to 15The device shown is a spray gun atomization adjustment and control device, which is set at the air outlet end of the spray gun body 1. The main structure includes a fixing nut 2, a nozzle assembly, an air cap assembly and a control component. The fixing nut 2 is fixedly connected to the air outlet end of the gun body 1, and an accommodating space is formed between the fixing nut 2 and the gun body 1. The nozzle assembly and the air cap assembly are relatively movable and set in the accommodating space.

[0039] See Figure 3 The nozzle assembly includes an air gate plate 31 and a nozzle 32 for supplying liquid. The air gate plate 31 is a hollow disc, and its outer periphery is securely pressed between the gun body 1 and the fixing nut 2. The outer periphery of the air gate plate 31 has several radially extending gate plate protrusions 311. The gun body 1 has several gun body slots 11 corresponding to the gate plate protrusions 311. This ensures that the air gate plate 31 will not rotate relative to the gun body 1 during use, thus maintaining stable airflow. The nozzle 32 is matched with the spray needle 12 of the gun body 1. The outer wall of the nozzle 32 has several connecting bridge plates 33 arranged circumferentially, and the nozzle 32 is integrally fixed to the center of the air gate plate 31 using the connecting bridge plates 33.

[0040] An air passage is formed between the air door panel 31 and the nozzle 32, and the air passage is connected to the air duct inside the gun body 1. In this embodiment, the air door panel 31 channel includes a main air passage 312 and four auxiliary forming air passages 313. The main air passage 312 is generally annular, and the connecting bridge plate 33 is disposed in the annular area of ​​the main air passage 312. The four auxiliary forming air passages 313 are evenly distributed on the outer periphery of the main air passage 312, and the auxiliary forming air passages 313 are radially connected to the main air passage 312.

[0041] See Figure 4 , 5 The center of the hood assembly is provided with a through hole 44 for the nozzle 32 to be inserted. The discharge end of the nozzle 32 extends into the air outlet end of the through hole 44. The hood assembly is also provided with a hood air channel. The through hole 44 and the hood air channel are both connected to the door panel air channel. Specifically, in this embodiment, the through hole 44 is connected to the main air channel 312 of the door panel, and the hood air channel is connected to the auxiliary forming air channel 313 of the door panel.

[0042] The wind cap assembly includes a floating through-air ring 41, an elastic element 42, and an atomizing wind cap body 43 arranged sequentially along the airflow direction. The floating through-air ring 41 abuts against the air door panel 31, and the floating through-air ring 41 and the atomizing wind cap body 43 are axially floatingly connected. In this embodiment, the floating through-air ring 41 is sleeved on the outer periphery formed by the cooperation of the above-mentioned connecting bridge pieces 33, which improves the installation position accuracy of the floating through-air ring 41. The outer periphery of the floating through-air ring 41 is provided with a plurality of air ring locking protrusions 411, and the inner wall of the atomizing wind cap body 43 is provided with a plurality of sliding grooves 431 corresponding one-to-one with the air ring locking protrusions 411. The inlet end of the sliding groove 431 is provided with a wind cap locking protrusion 432 that cooperates with the air ring locking protrusions 411 to prevent detachment. In this way, the atomizing wind cap body 43 and the floating through-air ring 41 will not rotate relative to each other when they move relative to each other in the axial direction, and the floating through-air ring 41 and the atomizing wind cap body 43 will also be prevented from detaching. The elastic element 42 is abutted between the floating through-air ring 41 and the atomizing air cap body 43. The control component is linked and cooperates with the atomizing air cap body 43. The floating through-air ring 41 and the atomizing air cap body 43 cooperate to form a through hole 44 and an air cap air channel.

[0043] The hood assembly is rotatably disposed within the accommodating space, and the hood air passage includes a flat-formed air passage 451 and a circular auxiliary-formed air passage 452 that are isolated from each other. When the hood assembly is rotated, the flat-formed air passage 451 and the circular auxiliary-formed air passage 452 can be switched to communicate with the door panel auxiliary-formed air passage 313.

[0044] In this embodiment, there are two flat-formed air channels 451, each with a circular longitudinal section, and the centers of the two flat-formed air channels 451 are symmetrically arranged with respect to the central axis of the wind cap assembly. There are four circular auxiliary-formed air channels 452, each with an arc-shaped longitudinal section, and the four circular auxiliary-formed air channels 452 are evenly distributed within the wind cap assembly along the circumferential direction.

[0045] A pair of side air outlet blocks 433 are symmetrically arranged at the end of the atomizing wind cap body 43 away from the floating through air ring 41. The two side air outlet blocks 433 are arranged in a one-to-one correspondence with two flat-formed air channels 451. The end face of the side air outlet block 433 is provided with a flat-formed air hole 434 and a flat auxiliary-formed air hole 435 that communicate with the corresponding flat-formed air channel 451. The flat auxiliary-formed air hole 435 located on the same side air outlet block 433 is arranged in a corresponding manner with the flat-formed air hole 434.

[0046] The end of the atomizing cap body 43 furthest from the floating through-air ring 41 is also provided with four circular auxiliary forming air holes 436, each corresponding to one of the four circular auxiliary forming air channels 452; the flat forming air hole 434, the flat auxiliary forming air hole 435, and the circular auxiliary forming air hole 436 are all provided corresponding to the through hole 44. Specifically, the air outlet convergence point A of the flat forming air hole 434 of the two side air outlet blocks 433 is located on the central axis of the through hole 44, the air outlet convergence point B of the flat auxiliary forming air hole 435 of the two side air outlet blocks 433 is also located on the central axis of the through hole 44, and the air outlet axis of the four circular auxiliary forming air holes 436 is parallel to the central axis of the through hole 44. See Figure 5 , 6 .

[0047] The through hole 44 of the hood assembly is always connected to the main air channel 312 of the door panel. During operation, the hood assembly is driven to rotate by rotating the side air outlet block 433. During this process, when the flat forming air channel 451 is connected to the corresponding door panel auxiliary forming air channel 313, the four circular auxiliary forming air channels 452 are all cut off due to misalignment with the door panel auxiliary forming air channel 313. At this time, part of the air in the gun body 1 flows to the discharge end of the nozzle 32 through the main air channel 312 and through hole 44 of the door panel, and the other part flows through the corresponding door panel auxiliary forming air channel 313, flat forming air channel 451, flat forming air hole 434 and flat forming air outlet 452. The auxiliary forming air hole 435 flows to the discharge end of the nozzle 32 to achieve flat atomized spraying of the liquid material; when the circular auxiliary forming air channel 452 is connected to the corresponding door panel auxiliary forming air channel 313, both flat forming air channels 451 are cut off due to misalignment with the door panel auxiliary forming air channel 313. At this time, part of the air in the gun body 1 flows to the discharge end of the nozzle 32 through the door panel main air channel 312 and through hole 44, and the other part flows to the discharge end of the nozzle 32 through the corresponding door panel auxiliary forming air channel 313, circular auxiliary forming air channel 452 and circular auxiliary forming air hole 436 to achieve circular atomized spraying of the liquid material.

[0048] The control component is used to drive the nozzle 32 assembly and the air cap assembly to move relative to each other within the accommodating space, so as to adjust the relative position of the discharge end face (i.e., nozzle end face 321) of the nozzle 32 and the air outlet end face (i.e., atomizing air cap body end face 438) of the through hole 44 in the axial direction of the accommodating space. See [link to relevant documentation]. Figure 9 , 10 11, 13, 14 and 15. Preferably, in order to ensure the coating effect, in this embodiment, the relative distance between the material outlet end face of the nozzle 32 and the air outlet end face of the through hole 44 in the axial direction of the accommodating space is 0-2mm.

[0049] The control component includes an amplitude adjustment block 5 rotatably disposed between the atomizing cap body 43 and the fixing nut 2. When the amplitude adjustment block 5 is rotated, it cooperates with the elastic element 42 to drive the atomizing cap body 43 to move axially relative to the floating through-air ring 41. Specifically, the end of the amplitude adjustment block 5 near the atomizing cap body 43 is provided with a block pre-compression plane 51, and the corresponding end face of the atomizing cap body 43 is provided with a cap pre-compression plane 437 that abuts against the block pre-compression plane 51; the end of the amplitude adjustment block 5 away from the atomizing cap body 43 is provided with a block ramp surface 52 extending circumferentially, and the corresponding end face of the fixing nut 2 is provided with a nut ramp surface 21 that abuts against the block ramp surface 52.

[0050] When in use, when moving the amplitude adjustment block 5 in the direction of the upward slope of the nut ramp 21, refer to... Figure 8 Under the mutual resistance of the ramp 52 of the adjusting block and the ramp 21 of the nut, the adjusting block 5 will axially push against the atomizing cap body 43, causing the elastic element 42 to be compressed and deformed. At this time, the atomizing cap body 43 will move towards the floating through-hole ring 41, so that the air outlet end face of the nozzle 32 extends out of the air outlet end face of the through hole 44 of the cap assembly. At this time, the spraying width of the spray gun increases, that is, the spraying area increases. See Figure 9 , 10 And 11; while when the amplitude adjustment block 5 is moved in the direction of the downward slope of the nut climbing ramp 21, see 11; Figure 12 When the amplitude adjustment block 5 reduces its supporting force on the atomizing cap body 43, the atomizing cap body 43 will move away from the floating through-air ring 41 under the elastic force of the elastic element 42, causing the air outlet end face of the nozzle 32 to retract into the air outlet end face of the through hole 44 of the cap assembly. At this time, the spraying width of the spray gun becomes smaller, that is, the spraying area becomes smaller. See [link to relevant documentation]. Figure 13 , 14 And 15.

[0051] The above description is only a preferred embodiment of the present invention. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of this patent application are included in the scope of this patent application.

Claims

1. A spray gun atomization adjustment and control device, disposed at the air outlet end of the spray gun body, comprising: A fixing nut is fixedly connected to the air outlet end of the gun body, and an accommodating space is formed between the fixing nut and the gun body; The wind cap assembly includes a floating through-air ring and an atomizing wind cap body. The floating through-air ring and the atomizing wind cap body are arranged sequentially along the airflow direction, and the floating through-air ring and the atomizing wind cap body are axially floatingly connected. The nozzle assembly and the wind cap assembly are sequentially arranged in the accommodating space along the airflow direction; The control component is equipped with a rotatable amplitude adjustment lever; The amplitude adjustment block is provided with a circumferentially extending ramp surface at one end away from the atomizing cap body, and the corresponding end face of the fixing nut is provided with a nut ramp surface that abuts against the ramp surface. When the amplitude adjustment block is moved in the direction of increasing slope of the nut climbing slope, the atomizing wind cap body moves towards the floating through wind ring; when the amplitude adjustment block is moved in the direction of decreasing slope of the nut climbing slope, the atomizing wind cap body moves away from the floating through wind ring.

2. The spray gun atomization adjustment and control device according to claim 1, characterized in that: When the amplitude adjustment block is moved in the direction of increasing slope of the nut climbing slope, the amplitude adjustment block and the nut climbing slope mutually resist each other, and the amplitude adjustment block axially pushes against the atomizing wind cap body. When the amplitude adjustment block is moved in the direction of decreasing slope of the nut climbing slope, the resisting force of the amplitude adjustment block on the atomizing wind cap body decreases.

3. The spray gun atomization adjustment and control device according to claim 1 or 2, characterized in that: The hood assembly also includes: An elastic element is provided between the floating through-air ring and the atomizing air cap body.

4. The spray gun atomization adjustment and control device according to claim 3, characterized in that: The amplitude adjustment block is rotatably disposed between the atomizing wind cap body and the fixing nut. When the amplitude adjustment block is rotated, the amplitude adjustment block cooperates with the elastic element to drive the atomizing wind cap body to move axially relative to the floating through wind ring.

5. The spray gun atomization adjustment and control device according to claim 1 or 2, characterized in that: The amplitude adjustment block has a block pre-compression plane at one end near the atomizing cap body, and the corresponding end face of the atomizing cap body has a cap pre-compression plane that abuts against the block pre-compression plane.

6. The spray gun atomization adjustment and control device according to claim 1 or 2, characterized in that: The outer periphery of the floating through-hole wind ring is provided with several wind ring locking protrusions, and the inner wall of the atomizing wind cap body is provided with several sliding grooves that correspond one-to-one with the wind ring locking protrusions. The inlet end of the sliding groove is provided with a wind cap locking protrusion that cooperates with the wind ring locking protrusion to prevent disengagement.

7. A spray gun atomization adjustment and control device, disposed at the air outlet end of the spray gun body, comprising: A fixing nut is fixedly connected to the air outlet end of the gun body, and an accommodating space is formed between the fixing nut and the gun body; Nozzle assembly, including nozzles for discharging feed liquid; The wind cap assembly includes a floating through-air ring and an atomizing wind cap body. The floating through-air ring and the atomizing wind cap body are arranged sequentially along the airflow direction. The floating through-air ring and the atomizing wind cap body are axially floatingly connected. The wind cap assembly has a through hole at its center for the nozzle to be inserted. The control component is equipped with a rotatable amplitude adjustment lever; The nozzle assembly and the wind cap assembly are sequentially arranged in the accommodating space along the airflow direction; The amplitude adjustment block is provided with a circumferentially extending ramp surface at one end away from the atomizing cap body, and the corresponding end face of the fixing nut is provided with a nut ramp surface that abuts against the ramp surface. When the amplitude adjustment block is moved in the direction of increasing slope of the nut climbing slope, the air outlet end face of the nozzle extends out of the air outlet end face of the through hole; when the amplitude adjustment block is moved in the direction of decreasing slope of the nut climbing slope, the air outlet end face of the nozzle retracts into the air outlet end face of the through hole.

8. The spray gun atomization adjustment and control device according to claim 7, characterized in that: The hood assembly also includes: An elastic element is provided between the floating through-air ring and the atomizing air cap body.

9. The spray gun atomization adjustment and control device according to claim 8, characterized in that: When the amplitude adjustment block is moved in the direction of the upward slope of the nut climbing slope, the elastic element is subjected to force and undergoes compression deformation, and the atomizing wind cap body moves in the direction closer to the floating through wind ring; When the amplitude adjustment block is moved in the direction of the downward slope of the nut climbing slope, the atomizing wind cap body moves away from the floating through wind ring under the elastic force of the elastic element.

10. The spray gun atomization adjustment and control device according to claim 9, characterized in that: When the amplitude adjustment block is moved in the direction of the upward slope of the nut climbing slope, the climbing slope of the block and the climbing slope of the nut abut against each other, and the amplitude adjustment block pushes the atomizing wind cap body axially. The amplitude adjustment block is moved in the direction of the downward slope of the nut climbing slope, and the supporting force of the amplitude adjustment block on the atomizing wind cap body is reduced.

11. A spray gun atomization adjustment and control device, disposed at the air outlet end of the spray gun body, comprising: A fixing nut is fixedly connected to the air outlet end of the gun body, and an accommodating space is formed between the fixing nut and the gun body; A hood assembly is disposed within the accommodating space, and the hood assembly includes an atomizing hood body; The nozzle assembly and the wind cap assembly are sequentially arranged in the accommodating space along the airflow direction; The control component is equipped with a rotatable amplitude adjustment lever; The end of the amplitude adjustment block away from the atomizing wind cap body is provided with a block climbing slope extending in the circumferential direction, and the corresponding end face of the fixing nut is provided with a nut climbing slope that abuts against the block climbing slope. When the amplitude adjustment block is moved in the direction of increasing slope of the nut climbing slope, the amplitude adjustment block axially pushes against the atomizing air cap body. At this time, the spraying surface width of the spray gun increases and the spraying area increases. When the amplitude adjustment block is moved in the direction of decreasing slope of the nut climbing slope, the resisting force of the amplitude adjustment block on the atomizing air cap body decreases. At this time, the spraying surface width of the spray gun decreases and the spraying area decreases.

12. The spray gun atomization adjustment and control device according to claim 11, characterized in that: The amplitude adjustment block has a block pre-compression plane at one end near the atomizing cap body, and the corresponding end face of the atomizing cap body has a cap pre-compression plane that abuts against the block pre-compression plane.

13. The spray gun atomization adjustment and control device according to claim 12, characterized in that: When the amplitude adjustment block is moved in the direction of the upward slope of the nut climbing slope, the climbing slope of the block and the climbing slope of the nut abut against each other.

14. The spray gun atomization adjustment and control device according to claim 12, characterized in that: The wind cap assembly further includes: a floating through-wind ring and an elastic element, wherein the floating through-wind ring, the elastic element and the atomizing wind cap body are arranged sequentially along the airflow direction; The floating through-air ring is axially floatingly connected to the atomizing air cap body, the elastic element is abutted between the floating through-air ring and the atomizing air cap body, and the control component is linked and cooperates with the atomizing air cap body; When the amplitude adjustment block axially pushes against the atomizing wind cap body, the elastic element is subjected to force and undergoes compression deformation, and the atomizing wind cap body moves towards the direction of the floating through-air ring; when the resisting force of the amplitude adjustment block on the atomizing wind cap body decreases, the atomizing wind cap body moves away from the floating through-air ring under the elastic force of the elastic element.

15. The spray gun atomization adjustment and control device according to claim 14, characterized in that: The nozzle assembly includes a nozzle for discharging liquid; the wind cap assembly has a through hole at its center for inserting the nozzle. When the atomizing wind cap body moves toward the direction of the floating through-hole, the air outlet end face of the nozzle extends out of the air outlet end face of the through hole; when the atomizing wind cap body moves away from the floating through-hole, the air outlet end face of the nozzle retracts into the air outlet end face of the through hole.

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