A spraying device for building decoration and a spraying method thereof

Abstract

The application provides a spraying device for building decoration, comprising a spray gun, the spray gun forms a liquid inlet end and a liquid outlet end respectively, the liquid inlet end and the liquid outlet end are respectively provided with a liquid conveying pipe and a spray head, the spraying device for building decoration further comprises: two mirror image arranged limiting blocks, the spray head is concave downward along the spray hole axis direction to form a mounting groove, the two limiting blocks are rotatably arranged in the mounting groove through a pin shaft; an adjusting unit, comprising a driving part sleeved on the spray head and an adjusting part connected between the two limiting blocks, the driving part and the adjusting part are connected. By sliding the driving part along the axis direction of the spray head, the driving part drives the adjusting part connected thereto to move between the two limiting blocks, so that the two limiting blocks rotate synchronously to change the included angle between the two limiting blocks, thereby adjusting the initial spraying angle of the mist-shaped spraying liquid, and the normal spraying work surface can be ensured at a proper spraying distance, the coating thickness is ensured, and spraying liquid waste is avoided.

Description

Technical Field

[0001] This invention relates to the field of building decoration technology, and in particular to a spraying device and spraying method for building decoration. Background Technology

[0002] Building decoration and finishing refers to the various treatments applied to the interior and exterior surfaces and spaces of a building using decorative materials or ornaments to protect its main structure, improve its physical performance and functionality, and beautify it. During building decoration and finishing, workers use spraying equipment to coat and beautify the corresponding building materials. During spraying, the piston of a pneumatic motor makes a stable and continuous reciprocating motion, pressurizing the inhaled paint. The paint is then delivered to the spray gun of the spraying machine through a high-pressure hose, where it is instantly atomized and released onto the surface of the object being coated, thus completing the coating process.

[0003] For example, Chinese patent "CN219794546" discloses "an easily adjustable spraying device for interior decoration and renovation." This device uses an output motor to drive a threaded rod, which in turn moves a threaded sleeve on the surface of the rod, thus adjusting the height of the spray head. This allows for spraying walls at different heights. Furthermore, drive wheels are installed under the base to facilitate moving the spraying equipment to different positions, improving its efficiency and utilization. However, in practice, it has been found that the current spray pattern of the spray head is mainly fan-shaped. Due to the fixed structure of the spray head, the fan-shaped spraying area is fixed. When spraying narrow structures (such as walls and columns), excess paint is wasted, indirectly increasing costs. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the first objective of the present invention is to provide a spraying device for building decoration, which solves the problem that when the spray nozzle is used to spray narrow buildings, excess paint is wasted and indirectly increases costs.

[0005] According to an embodiment of the present invention, a spraying device for building decoration includes a spray gun, which has an inlet end and an outlet end, and the inlet end and outlet end are respectively provided with a liquid delivery pipe and a nozzle. The spraying device for building decoration further includes:

[0006] Two mirror-mounted limiting blocks are provided, and the nozzle is recessed downward along the axis of the nozzle hole to form a mounting groove. Both limiting blocks are rotatably mounted in the mounting groove via a pin.

[0007] The adjustment unit includes a drive part sleeved on the nozzle and an adjustment part connected between two limit blocks. The drive part and the adjustment part are connected. When the drive part moves along the axis of the nozzle, it causes the adjustment part to drive the two limit blocks to rotate around their set pins as the axis, so as to change the angle between the two limit blocks.

[0008] Compared with the prior art, the present invention has the following beneficial effects:

[0009] By creating a downward mounting groove along the axis of the nozzle orifice, the normal spraying of the nozzle is not hindered, and a position is provided for the installation of the two limiting blocks, ensuring that they do not protrude from the end of the nozzle and maintaining an aesthetically pleasing appearance. The two limiting blocks are mirror-mounted at the nozzle orifice position. The sprayed liquid, after passing through the inlet and outlet ends, is finally sprayed out through the nozzle orifice. The two limiting blocks guide the sprayed mist liquid and limit the initial spray angle of the mist liquid, preventing it from spreading to adjacent areas. Furthermore, the overall structure of the nozzle is improved by the adjustment unit. By sliding the drive unit along the axis of the nozzle, the drive unit drives the connected adjustment unit to move between the two limiting blocks, causing the two limiting blocks to rotate synchronously. This changes the included angle between the two limiting blocks, thereby adjusting the initial spray angle of the mist liquid. When spraying small architectural decorative surfaces, a normal spraying operation can be ensured at an appropriate spraying distance, ensuring the coating thickness while avoiding waste of sprayed liquid.

[0010] Preferably, the drive unit includes an adjusting block threadedly connected to the nozzle and a moving block slidably sleeved on the nozzle, the moving block being rotatably mounted on the adjusting block; the adjusting unit includes a toothed block mounted on the moving block and a gear mounted on the pin of the limiting block, the toothed block passing through the nozzle and located between the two gears, and meshing with the two gears.

[0011] Preferably, the movable block is provided with a limiting rod, which passes through the nozzle.

[0012] Preferably, the adjustment block has a polygonal structure.

[0013] Preferably, the nozzle end is provided with a mounting part, which is fixedly connected to the liquid outlet end of the spray gun by several bolts.

[0014] Preferably, the spraying device for building decoration also includes:

[0015] A sliding plate is slidably installed at the inlet end. The sliding plate has two through holes, and each through hole is equipped with a corresponding connector. The infusion tube is connected to one of the connectors.

[0016] The liquid storage tank is equipped with a cover plate, and the cover plate is equipped with an installation head. The installation head is equipped with a second delivery pipe, one end of which is connected to another connector. The cover plate is equipped with a delivery pump connected to the installation head. The delivery pump is equipped with a first delivery pipe, one end of which extends to the bottom of the liquid storage tank.

[0017] Preferably, a mounting base is fixedly provided on the side of the liquid inlet end, and an adjusting screw is rotatably provided on one side of the sliding plate, with the adjusting screw threadedly connected to the mounting base.

[0018] Preferably, the end of the adjusting screw is provided with a knob so that when the knob abuts against the mounting base, the infusion tube aligns with the inlet end, and when the sliding plate abuts against the mounting base, the second delivery tube aligns with the inlet end.

[0019] Preferably, the cover plate has a connecting end, and the connecting end is fixedly provided with a mounting screw, which is threadedly connected to the spray gun.

[0020] In view of the shortcomings of the prior art, the second objective of the present invention is to provide a spraying method for building decoration, which solves the problem that when the spray nozzle is used to spray narrow buildings, excess paint is wasted and indirectly increases costs.

[0021] A method for spraying architectural decoration, using the aforementioned architectural decoration spraying device, specifically includes the following steps:

[0022] Spraying surface adjustment: By sliding the drive unit along the axis of the nozzle, the drive unit drives the adjustment unit to move between two limit blocks, thereby causing the two limit blocks to rotate around their set pins, thus changing the angle between the two limit blocks and changing the spraying range of the nozzle orifice.

[0023] Decorative surface spraying: Connect the liquid inlet of the spray gun to the liquid delivery pipe so that the spraying liquid is delivered to the spray gun through the liquid delivery pipe. Align the nozzle of the nozzle with the decorative surface and press the valve of the nozzle to discharge the spraying liquid through the two limit blocks.

[0024] Cleaning: After spraying, push the sliding plate so that the sliding plate moves the second delivery pipe to correspond with the opening of the liquid inlet, and turn on the delivery pump to deliver the cleaning liquid in the storage tank to the spray gun, and finally spray it out from the liquid outlet to complete the cleaning.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] By adjusting the angle of the two mirror-mounted limiting blocks, the initial spray angle of the mist spray liquid can be restricted. This allows for spraying of buildings of different widths at appropriate spraying distances, improving work efficiency and preventing paint waste. Furthermore, after spraying is completed, cleaning fluid from the storage tank can be quickly delivered to the nozzle for cleaning, removing any residual paint and preventing blockages. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present invention.

[0028] Figure 2 This is a three-dimensional structural diagram of the nozzle in an embodiment of the present invention.

[0029] Figure 3 This is a schematic diagram of the planar structure of the nozzle in an embodiment of the present invention.

[0030] Figure 4 This is a cross-sectional structural diagram of the nozzle in an embodiment of the present invention.

[0031] Figure 5 This is a schematic diagram of the structure of the second conveying pipe connecting cover plate and sliding plate in an embodiment of the present invention.

[0032] Figure 6 This is a schematic cross-sectional view of the liquid inlet end in an embodiment of the present invention.

[0033] Figure 7 This is a schematic diagram of the fan-shaped spray range in an embodiment of the present invention.

[0034] Figure 8 This is another schematic diagram of the fan-shaped spray range in an embodiment of the present invention.

[0035] In the above attached figures: 1. Spray gun; 11. Infusion pipe; 12. Inlet end; 13. Outlet end; 2. Nozzle; 21. Bolt; 22. Mounting groove; 23. Limiting block; 24. Mounting part; 3. Storage tank; 31. Cover plate; 32. Mounting head; 33. Connecting end; 34. Mounting screw; 4. Moving block; 41. Adjusting block; 42. Tooth block; 43. Gear; 44. Limiting rod; 5. Sliding plate; 51. Connecting head; 6. Adjusting screw; 61. Mounting seat; 62. Knob; 7. Delivery pump; 71. First delivery pipe; 8. Second delivery pipe. Detailed Implementation

[0036] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0037] This invention provides a spraying device for architectural decoration, including a spray gun 1, which has an inlet end 12 and an outlet end 13. The inlet end 12 and the outlet end 13 are respectively provided with a liquid delivery pipe 11 and a nozzle 2. The spraying device for architectural decoration also includes:

[0038] Two mirror-mounted limiting blocks 23 are provided. The nozzle 2 is recessed downward along the nozzle axis to form a mounting groove 22. Both limiting blocks 23 are rotatably mounted in the mounting groove 22 via pins.

[0039] The adjustment unit includes a drive part sleeved on the nozzle 2 and an adjustment part connected between two limit blocks 23. The drive part and the adjustment part are connected. When the drive part moves along the axis of the nozzle 2, the adjustment part drives the two limit blocks 23 to rotate around their set pins as the axis, so as to change the angle between the two limit blocks 23.

[0040] In embodiments of the present invention, such as Figure 1 and Figure 2 As shown, by opening the mounting groove 22 downward along the axis of the nozzle 2, it not only does not hinder the normal spraying of the nozzle 2, but also provides a position for the installation of the two limiting blocks 23, so that they do not protrude from the end of the nozzle 2, thus ensuring aesthetics.

[0041] Secondly, two limiting blocks 23 are mirror-mounted at the nozzle orifice of the nozzle 2. The sprayed liquid, after passing through the inlet end 12 and the outlet end 13, is finally sprayed out through the nozzle orifice of the nozzle 2. The two limiting blocks 23 guide the sprayed mist liquid and limit the initial spray angle of the mist liquid, preventing the mist liquid from spreading to the side areas. Furthermore, under the action of the adjustment unit, the overall structure of the nozzle 2 is improved. By sliding the drive unit along the axis of the nozzle 2, the drive unit drives the connected adjustment unit to move between the two limiting blocks 23, thereby causing the two limiting blocks 23 to rotate synchronously, changing the included angle between the two limiting blocks 23, and thus adjusting the initial spray angle of the mist liquid. When spraying small-area architectural decorative surfaces, a normal spraying operation can be ensured at an appropriate spraying distance, ensuring both the coating thickness and avoiding waste of sprayed liquid.

[0042] Specifically, such as Figure 7 and Figure 8 As shown, auxiliary lines are drawn using the extension directions of the two limiting blocks 23, causing the side lengths of the limiting blocks 23 to extend outwards. Angles α and β are then drawn between the two limiting blocks 23. Figure 7 and Figure 8 The distance between nozzle 2 and the building is the same, where β > α, see... Figure 7When the included angle between the two limiting blocks 23 is α, the cross-section of the sprayed liquid, after being guided and diffused by the two limiting blocks 23, applied to the building is L1, see... Figure 8 When the included angle between the two limiting blocks 23 is β, the cross-section of the sprayed liquid after being guided and diffused by the two limiting blocks 23 on the building is L2. It can be seen that when β > α, the corresponding L2 > L1. Different included angles between the limiting blocks 23 can be selected according to the actual sprayed area of ​​the building.

[0043] Currently, the method of covering areas that do not need to be sprayed, with the adjustable L setting, can reduce the amount of paving materials used when spraying narrow buildings, greatly reducing manpower and spraying time. Furthermore, when spraying road markings on building surfaces, L can be adjusted to the height of the road marking text, reducing the amount of paint sprayed outside the text, ensuring normal paint thickness while reducing paint waste.

[0044] Specifically, the drive unit includes an adjusting block 41 threadedly connected to the nozzle 2 and a moving block 4 slidably sleeved on the nozzle 2, with the moving block 4 rotatably mounted on the adjusting block 41; the adjusting unit includes a toothed block 42 mounted on the moving block 4 and a gear 43 mounted on the pin shaft of the limiting block 23, with the toothed block 42 passing through the nozzle 2 and located between the two gears 43, and meshing with the two gears 43.

[0045] like Figures 2 to 4 As shown, when adjusting the angle of the two limit blocks 23 through the cooperation of the drive unit and the adjustment unit, the adjustment block 41, which is threadedly connected to the nozzle 2, is directly rotated, causing the adjustment block 41 to move on the nozzle 2. Since the moving block 4 is rotatably mounted on the adjustment block 41, when the adjustment block 41 rotates and moves, it will not drive the moving block 4 to rotate, but only drive the moving block 4 to move on the nozzle 2. At the same time as the moving block 4 moves, the moving block 4 drives the toothed block 42 it is mounted on to move inside the nozzle 2, thereby driving the two meshing gears 43 to rotate clockwise and counterclockwise. This causes the gears 43 to drive the limit blocks 23 they are connected to to rotate, quickly adjusting the angle between the two limit blocks 23. When the angle is adjusted to the specified angle, the rotation of the adjustment block 41 can be stopped, and it completes the stop under the self-locking of the thread, thus completing the adjustment.

[0046] Furthermore, the moving block 4 is equipped with a limiting rod 44, which passes through the nozzle 2. Under the action of the limiting rod 44, the adjusting block 41 can be limited, so that the toothed block 42 will not be subjected to the circumferential force from the adjusting block 41. This ensures that the moving block 4 can only slide along the axis of the nozzle 2, and also prevents the toothed block 42 from squeezing the meshing gear 43. Moreover, a scale can be drawn on the limiting rod 44, such as the angle between the two limiting blocks 23. To facilitate the adjustment of the adjusting block 41, the adjusting block 41 is a polygonal structure, such as a triangle, quadrilateral, or pentagon. The plane formed by its side not only facilitates manual adjustment, but also allows for clamping and adjustment with tools, making it convenient to use. To facilitate the overall installation of the nozzle 2, the end of the nozzle 2 is equipped with a mounting part 24. The mounting part 24 is fixedly connected to the liquid outlet end 13 of the spray gun 1 by several bolts 21. The nozzle 2 can be removed from the liquid outlet end 13 by simply unscrewing the bolts 21, making it convenient for replacement and maintenance.

[0047] Specifically, spraying equipment for building decoration and finishing also includes:

[0048] A sliding plate 5 is slidably disposed at the liquid inlet end 12. Two through holes are provided on the sliding plate 5, and each of the two through holes is provided with a corresponding connector 51. The infusion tube 11 is connected to one of the connectors 51.

[0049] The liquid storage tank 3 is provided with a cover plate 31, and a mounting head 32 is provided on the cover plate 31. A second delivery pipe 8 is provided on the mounting head 32. One end of the second delivery pipe 8 is connected to another connector 51. A delivery pump 7 connected to the mounting head 32 is provided inside the cover plate 31. The delivery pump 7 is provided with a first delivery pipe 71. One end of the first delivery pipe 71 extends to the bottom end of the liquid storage tank 3.

[0050] In embodiments of the present invention, such as Figure 5 and Figure 6As shown, in order to reduce the overall process of using and cleaning the spray gun 1, after the building's decorative surface is sprayed with the spray gun 1, the spraying fluid power source of the inlet pipe 11 is turned off. By pushing the sliding plate 5, which is slidably located at the inlet end 12, the sliding plate 5 causes the through hole connected to the inlet pipe 11 to separate from the opening of the inlet end 12. At the same time, the sliding plate 5 causes the through hole connected to the second delivery pipe 8 to align with the opening of the inlet end 12. The delivery pump 7 on the cover plate 31 is opened, and the cleaning fluid in the storage tank 3 is delivered to the passage inside the spray gun 1 through the action of the first delivery pipe 71, the delivery pump 7, and the second delivery pipe 8. The valve of the spray gun 1 is opened, so that the cleaning fluid used for cleaning is discharged through the outlet end 13, thus completing the cleaning of the passage inside the spray gun 1. The cleaning of the spray gun 1 is completed at the same time after the spraying is finished, saving time. Both the first conveying pipe 71 and the second conveying pipe 8 can be made of softer rubber tubing. Furthermore, the connector 51 and the mounting head 32 are both insert-type connections. The two ends of the second conveying pipe 8 are directly sleeved or inserted into the connector 51 or the mounting head 32, allowing the second conveying pipe 8 to deform and fix itself to the connector 51 and the mounting head 32. When disassembling, it can be pulled directly, which is convenient for installation and disassembly and has strong assemblability.

[0051] Specifically, in order to fix the sliding plate 5 after adjustment, a mounting base 61 is fixedly provided on the side of the liquid inlet end 12, and an adjusting screw 6 is rotatably provided on one side of the sliding plate 5. The adjusting screw 6 is threadedly connected to the mounting base 61. When adjusting the sliding plate 5, the adjusting screw 6 is rotated, causing the adjusting screw 6 to rotate on the mounting base 61, thereby causing the end of the adjusting screw 6 to drive the sliding plate 5 to translate at the position of the liquid inlet end 12. When the rotation of the adjusting screw 6 is stopped, self-fixation can be completed under the self-locking property of the adjusting screw 6, ensuring the stability of the sliding plate 5 after adjustment.

[0052] Furthermore, to increase the correspondence between the two through holes and the opening of the inlet end 12 after the sliding plate 5 is adjusted, a knob 62 is provided at the end of the adjusting screw 6. When the knob 62 abuts against the mounting base 61, the infusion tube 11 aligns with the opening of the inlet end 12; and when the sliding plate 5 abuts against the mounting base 61, the second delivery tube 8 aligns with the opening of the inlet end 12. Therefore, when rotating the adjusting screw 6, it is only necessary to ensure that the sliding plate 5 abuts against the mounting base 61, or that the knob 62 abuts against the mounting base 61, to know the correspondence between the two through holes and the opening of the inlet end 12. Moreover, as... Figure 5 As shown, the cover plate 31 is provided with a connecting end 33, and the connecting end 33 is fixedly provided with an installation screw 34. The installation screw 34 is threadedly connected to the spray gun 1, which facilitates the installation of the liquid storage tank 3. The liquid storage tank 3 and the cover plate 31 are also connected by threads, which facilitates the addition of cleaning fluid in the liquid storage tank 3. In actual use, in order to reduce the overall weight of the spray gun 1, the cleaning fluid capacity in the liquid storage tank 3 can be increased as appropriate.

[0053] This invention also provides a spraying method for architectural decoration, which uses the above-mentioned spraying device for architectural decoration, and specifically includes the following steps:

[0054] Spraying surface adjustment: By sliding the drive unit along the axis of the nozzle 2, the drive unit drives the adjustment unit to move between the two limit blocks 23, thereby causing the two limit blocks 23 to rotate around their set pins, thereby changing the angle between the two limit blocks 23 and changing the spraying range of the nozzle 2.

[0055] Decorative surface spraying: Connect the liquid inlet 12 of the spray gun 1 to the liquid delivery pipe 11 so that the spraying liquid is delivered to the spray gun 1 through the liquid delivery pipe 11. Align the nozzle of the nozzle 2 with the decorative surface and press the valve of the nozzle 2 to discharge the spraying liquid between the two limit blocks 23.

[0056] Cleaning: After spraying, push the sliding plate 5 so that the sliding plate 5 drives the second delivery pipe 8 to correspond with the opening of the liquid inlet 12, and turn on the delivery pump 7 to deliver the cleaning liquid in the storage tank 3 to the spray gun 1, and finally spray it out from the liquid outlet 13 to complete the cleaning.

[0057] In summary, by adjusting the angle of the two mirror-mounted limiting blocks 23, the initial spray angle of the mist spray liquid can be limited. This allows for spraying of buildings of different widths when using an appropriate spraying distance, improving work efficiency and preventing paint waste. Furthermore, after spraying is completed, the cleaning fluid in the storage tank 3 can be quickly delivered to the nozzle 2 for cleaning, removing any residual paint and preventing clogging, thus simplifying the overall use-cleaning process of the spray gun 1.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A spraying device for building decoration, comprising a spray gun (1), wherein the spray gun (1) has a liquid inlet (12) and a liquid outlet (13), and the liquid inlet (12) and the liquid outlet (13) are respectively provided with a liquid delivery pipe (11) and a nozzle (2), characterized in that, The building decoration spraying device also includes: Two mirror-mounted limiting blocks (23) are provided. The nozzle (2) is recessed downward along the nozzle axis to form a mounting groove (22). Both limiting blocks (23) are rotatably mounted in the mounting groove (22) via pins. The adjustment unit includes a drive part sleeved on the nozzle (2) and an adjustment part connected between the two limiting blocks (23). The drive part and the adjustment part are connected. When the drive part moves along the axial direction of the nozzle (2), the adjustment part causes the two limiting blocks (23) to rotate around their provided pins, thereby changing the angle between the two limiting blocks (23). The drive unit includes an adjusting block (41) threadedly connected to the nozzle (2) and a moving block (4) slidably sleeved on the nozzle (2). The moving block (4) is rotatably disposed on the adjusting block (41). The adjusting unit includes a toothed block (42) disposed on the moving block (4) and a gear (43) disposed on the pin shaft of the limiting block (23). The toothed block (42) passes through the nozzle (2) and is located between the two gears (43), and meshes with the two gears (43).

2. The spraying device for building decoration and finishing according to claim 1, characterized in that, The movable block (4) is provided with a limiting rod (44), which passes through the nozzle (2).

3. The spraying device for building decoration and finishing according to claim 1, characterized in that, The adjustment block (41) has a polygonal structure.

4. A spraying device for architectural decoration according to any one of claims 1-3, characterized in that, The nozzle (2) is provided with a mounting part (24) at its end, and the mounting part (24) is fixedly connected to the liquid outlet end (13) of the spray gun (1) by a number of bolts (21).

5. The spraying device for building decoration and finishing according to claim 1, characterized in that, The building decoration spraying device also includes: A sliding plate (5) is slidably disposed on the inlet end (12). The sliding plate (5) has two through holes, and each of the two through holes is provided with a corresponding connector (51). The infusion tube (11) is connected to one of the connectors (51). The liquid storage tank (3) is provided with a cover plate (31). The cover plate (31) is provided with an installation head (32). The installation head (32) is provided with a second delivery pipe (8). One end of the second delivery pipe (8) is connected to another connector (51). The cover plate (31) is provided with a delivery pump (7) connected to the installation head (32). The delivery pump (7) is provided with a first delivery pipe (71). One end of the first delivery pipe (71) extends to the bottom of the liquid storage tank (3).

6. The spraying device for building decoration and finishing according to claim 5, characterized in that, A mounting base (61) is fixedly provided on the side of the liquid inlet end (12), and an adjusting screw (6) is rotatably provided on one side of the sliding plate (5). The adjusting screw (6) is threadedly connected to the mounting base (61).

7. The spraying device for building decoration and finishing according to claim 6, characterized in that, The end of the adjusting screw (6) is provided with a knob (62) so that when the knob (62) abuts against the mounting base (61), the infusion tube (11) corresponds to the opening of the inlet end (12), and when the sliding plate (5) abuts against the mounting base (61), the second delivery tube (8) corresponds to the opening of the inlet end (12).

8. The spraying device for building decoration and finishing according to claim 6, characterized in that, The cover plate (31) is provided with a connecting end (33), and the connecting end (33) is fixedly provided with a mounting screw (34), which is threadedly connected to the spray gun (1).

9. A spraying method for architectural decoration, characterized in that, The spraying process using the building decoration spraying device according to claim 5 specifically includes the following steps: Spraying surface adjustment: By sliding the drive unit along the axis of the nozzle (2), the drive unit drives the adjustment unit to move between the two limiting blocks (23), thereby causing the two limiting blocks (23) to rotate around their set pins, thereby changing the angle between the two limiting blocks (23) to change the spraying range of the nozzle (2). Decorative surface spraying: Connect the liquid inlet (12) of the spray gun (1) to the liquid delivery pipe (11) so that the spraying liquid is delivered to the spray gun (1) through the liquid delivery pipe (11). Align the nozzle (2) with the decorative surface and press the valve of the nozzle (2) to discharge the spraying liquid between the two limiting blocks (23). Cleaning: After the spraying is completed, push the sliding plate (5) so that the sliding plate (5) drives the second delivery pipe (8) to correspond with the opening of the liquid inlet (12), and turn on the delivery pump (7) to deliver the cleaning liquid in the storage tank (3) to the spray gun (1), and finally spray it out from the liquid outlet (13) to complete the cleaning.

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