Universal automatic spray gun for building coating

Abstract

The invention provides a general automatic spray gun for building coating, which comprises a quick switch type electric ball valve for controlling the on-off and flow of the coating; the feeding connector is fixedly connected to the feeding end of the quick switch type electric ball valve and used for being externally connected with a coating conveying pipeline; the material-gas integrated multi-layer cavity piece is fixedly connected to the discharging end of the quick switch type electric ball valve, and a coating channel, a central atomization gas path and a fan-shaped atomization gas path which are separated in a layered mode are arranged in the material-gas integrated multi-layer cavity piece; the central atomization gas path joint and the fan-shaped atomization gas path joint are respectively and independently connected to the material-gas integrated multi-layer cavity piece and are used for externally connecting an independently controlled gas source; the water path joint is connected to the material-gas integrated multi-layer cavity piece and is used for being externally connected with a flushing water path; the nozzle is detachably mounted at the discharge end of the material-gas integrated multi-layer cavity piece; the gas nozzle and the nozzle or the material-gas integrated multi-layer cavity piece form an independent atomization gas chamber; and the gun cap is used for fixing the gas nozzle. The coating flow control device has the beneficial effects that the coating flow is controllable, the waterway design is introduced, and the crust phenomenon is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of coating spraying, in particular to a universal automatic spray gun for architectural coatings. Background Art

[0002] Architectural coatings are usually divided into thin-walled coatings and thick-walled coatings. Thin-walled coatings include primers, latex paints, multi-color paints, and topcoats. These coatings are sand-free, have low density, and high viscosity. Thick-walled coatings include real stone paints, textured paints, and exterior wall putties. These coatings have high sand content, high density, and high viscosity. At present, in the field of automatic exterior wall spraying by building robots, the automatic switch gun is generally indirectly realized by adding an air-controlled trigger and an in-place detection sensor to the manual spray guns of these two types of coatings.

[0003] However, manual spray guns have different designs for different coatings, and there are many types. Therefore, different air-controlled triggers need to be designed and installed, and the structure is bulky and complicated. Moreover, the air-controlled trigger has only two states: fully open and fully closed, and cannot control the flow of paint. In addition, the central atomization air path and the fan-shaped atomization air path of the manual spray gun share the same air path, and there is a coupling relationship between the two. Manual decoupling and gun adjustment must be done based on experience; in addition, the materials used for manual spray guns are usually stainless steel and ceramics, which are materials that are easy to adhere to architectural coatings. Under continuous spraying, a thin layer of multi-layer adsorption and adhesion crusting will occur at the nozzle outlet and the air nozzle pores, making the nozzle outlet and the atomization pores smaller, resulting in a serious decrease in the atomization effect of the paint, which is not suitable for automated spraying.

[0004] Therefore, there is an urgent need for a universal controllable spraying of thin-slurry and thick-slurry architectural coatings, an automatic spray gun in which the central atomizing air path and the fan-shaped atomizing air path are independently controllable in the spray gun, and a crusting phenomenon can be prevented from occurring at the nozzle outlet and the air nozzle air hole. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a universal automatic spray gun for architectural coatings, so as to achieve controllable coating flow and prevent the occurrence of skinning.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a universal automatic spray gun for architectural coatings, comprising:

[0007] Quick-on / off electric ball valve, used to control the on / off and flow of paint;

[0008] A feed connector, fixedly connected to the feed end of the quick-opening electric ball valve, for connecting to an external paint delivery pipeline;

[0009] The material-gas integrated multilayer cavity is fixedly connected to the discharge end of the quick-opening electric ball valve, and is provided with a layered and isolated coating channel, a central atomizing gas path and a fan-shaped atomizing gas path;

[0010] The central atomizing gas path connector and the fan-shaped atomizing gas path connector are independently connected to the material-gas integrated multilayer cavity component, respectively, for externally connecting an independently controlled gas source;

[0011] A water channel connector, connected to the material-gas integrated multi-layer cavity, for externally connecting a flushing water channel;

[0012] A nozzle is detachably mounted on the discharge end of the material-gas integrated multi-layer cavity;

[0013] The gas nozzle forms an independent atomizing gas chamber by matching the shape and surface with the nozzle or the material-gas integrated multi-layer cavity;

[0014] The gun cap is used for fixing the gas nozzle.

[0015] Furthermore, the coating channel, the central atomizing gas path and the fan-shaped atomizing gas path of the material-gas integrated multi-layer cavity are completely independent through physical barriers, and the gas flows of the central atomizing gas path and the fan-shaped atomizing gas path do not interfere with each other.

[0016] Furthermore, the coating passage of the material-gas integrated multi-layer cavity is arranged in the middle, the central atomizing gas path surrounds the outside of the coating passage, and the fan-shaped atomizing gas path surrounds the outside of the central atomizing gas path.

[0017] Furthermore, the atomizing air chamber formed by the cooperation of the air nozzle and the spray nozzle comprises a central atomizing air chamber and a fan-shaped atomizing air chamber, which correspond to independent gas inputs of the central atomizing air path and the fan-shaped atomizing air path respectively.

[0018] Furthermore, the nozzle and the air nozzle are replaceable components, including a horn air nozzle suitable for thin-walled paint and a conical air nozzle suitable for thick-walled paint.

[0019] Furthermore, the water channel joint is connected to the material-gas integrated multilayer cavity, and after spraying, the nozzle and the gas nozzle outlet are flushed with clean water to prevent the paint from crusting.

[0020] Furthermore, the nozzle is provided with an inner circle of air holes and an outer circle of air holes, which correspond to the gas passages of the central atomization gas path and the fan-shaped atomization gas path respectively.

[0021] Furthermore, the fan-shaped atomizing gas path merges with the central atomizing gas path when spraying thick paste type coating, so as to increase the central atomizing gas flow rate.

[0022] Furthermore, the valve core opening of the quick-opening electric ball valve is adjustable, and the flow rate of the paint is controlled by a preset angle.

[0023] Furthermore, the gun cap is fixed to the material-gas integrated multi-layer cavity by threaded connection, ensuring a close fit between the gas nozzle and the nozzle.

[0024] The beneficial effects of the present invention are as follows: the gun body is universal, and different coatings can be sprayed by replacing the nozzle and the air nozzle; the switch gun is automatically controlled, and the coating flow rate is controllable; the central atomization air path and the fan-shaped atomization air path are independently controllable; the introduction of the water path design facilitates flushing of the inside and outside of the spray gun body, the nozzle mouth, and the air nozzle mouth to prevent the occurrence of crusting. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the mechanisms shown in these drawings without paying any creative work.

[0026] Figure 1 A latex paint morphology diagram of a universal automatic spray gun for architectural coatings according to an embodiment of the present invention;

[0027] Figure 2 An exploded view of the latex paint form of a universal automatic spray gun for architectural coatings according to an embodiment of the present invention;

[0028] Figure 3 A diagram showing the true stone paint morphology of a universal automatic spray gun for architectural coatings according to an embodiment of the present invention;

[0029] Figure 4 An exploded view of the real stone paint of a universal automatic spray gun for architectural coatings according to an embodiment of the present invention;

[0030] Figure 5 This is a cross-sectional view of the waterway inlet of the material-gas integrated multi-layer cavity according to an embodiment of the present invention;

[0031] Figure 6 A cross-sectional view of the gas path inlet of the material-gas integrated multi-layer cavity according to an embodiment of the present invention;

[0032] Figure 7 A half-section diagram of a latex paint spraying gas path according to an embodiment of the present invention;

[0033] Figure 8 A half-section diagram of a true stone paint spraying gas path according to an embodiment of the present invention;

[0034] Among them, 11. Quick-opening electric ball valve; 12. Feed connector; 13. Material-gas integrated multilayer cavity; 14. Central atomizing gas circuit connector; 15. Water circuit connector; 16. Fan-shaped atomizing gas circuit connector; 17. Gun cap; 18. Nozzle for latex paint; 19. Claw air nozzle; 28. Nozzle for real stone paint; 29. ​​Conical air nozzle; 131. Paint channel; 132. Water circuit inlet; 133. Fan-shaped atomizing gas circuit inlet; 134. Fan-shaped atomizing gas circuit; 135. Central atomizing gas circuit inlet; 136. Central atomizing gas circuit. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0037] like Figure 1-8 As shown, an embodiment of the present invention is: a universal automatic spray gun for architectural coatings, comprising:

[0038] A fast-on / off electric ball valve 11 is used to control the on / off and flow rate of the paint;

[0039] A feed connector 12, fixedly connected to the feed end of the quick-opening electric ball valve 11, for connecting to an external paint delivery pipeline;

[0040] The material-gas integrated multilayer cavity 13 is fixedly connected to the discharge end of the quick-opening electric ball valve 11, and is provided with a layered and isolated coating channel 131, a central atomizing gas path 136 and a fan-shaped atomizing gas path 134;

[0041] The central atomizing gas path connector 14 and the fan-shaped atomizing gas path connector 16 are independently connected to the central atomizing gas path inlet 135 and the fan-shaped atomizing gas path inlet 133 of the material-gas integrated multilayer chamber 13, respectively, for externally connecting an independently controlled gas source;

[0042] A water channel connector 15, connected to the water channel inlet 132 of the material-gas integrated multi-layer chamber 13, for connecting an external flushing water channel;

[0043] The nozzle is detachably mounted on the discharge end of the material-gas integrated multi-layer cavity 13; the nozzle includes a nozzle 18 for latex paint and a nozzle 28 for real stone paint;

[0044] The air nozzle forms an independent atomizing air chamber through the shape and surface matching with the nozzle or the material-gas integrated multi-layer cavity 13; the air nozzle includes a horn air nozzle 19 and a conical air nozzle 29;

[0045] The gun cap 17 is used to fix the gas nozzle.

[0046] In this embodiment, in the construction of building exterior walls, the spray gun is used to spray latex paint (thin paste type) and real stone paint (thick paste type) in sequence. By replacing the nozzle and the air nozzle, there is no need to adjust the air circuit or disassemble the spray gun body, and the water circuit flushing is automatically started after the spraying is completed to prevent the nozzle from crusting.

[0047] In a specific embodiment, the coating channel 131, the central atomizing gas path 136 and the fan-shaped atomizing gas path 134 of the material-gas integrated multilayer chamber 13 are completely independent through physical barriers, and the gas flows of the central atomizing gas path 136 and the fan-shaped atomizing gas path 134 do not interfere with each other.

[0048] In this embodiment, when spraying multi-color paint, the air pressure of the central atomizing air path 136 is adjusted separately to control the size of the atomized particles, and the air pressure of the fan-shaped atomizing air path 134 is adjusted to adjust the spraying width, and the two do not affect each other.

[0049] In a specific embodiment, the coating channel 131 of the material-gas integrated multi-layer cavity 13 is arranged in the middle, the central atomizing gas path 136 surrounds the outer side of the coating channel 131 , and the fan-shaped atomizing gas path 134 surrounds the outer side of the central atomizing gas path 136 .

[0050] In this embodiment, during spraying, the central atomizing air path 136 and the fan-shaped atomizing air path 134 surrounding the outer periphery of the paint channel 131 can make the sprayed paint more uniform.

[0051] In a specific embodiment, the atomizing air chamber formed by the cooperation of the gas nozzle and the spray nozzle includes a central atomizing air chamber and a fan-shaped atomizing air chamber, which correspond to independent gas inputs of the central atomizing air path 136 and the fan-shaped atomizing air path 134, respectively.

[0052] In this embodiment, when spraying the topcoat, the airflow in the central atomizing chamber refines the paint particles, and the airflow in the fan-shaped atomizing chamber diffuses the atomized paint in a direction to form a flat and smooth surface.

[0053] In a specific embodiment, the nozzle and the air nozzle are replaceable components, including a horn air nozzle 19 suitable for thin-walled paint and a conical air nozzle 29 suitable for thick-walled paint.

[0054] In this embodiment, a horn air nozzle 19 and a thin-walled nozzle are installed to spray latex paint to form a fine atomization effect; after replacing with a conical air nozzle 29 and a thick-walled nozzle, sand-containing real stone paint can be directly sprayed without adjusting the main structure of the spray gun.

[0055] In a specific embodiment, the water channel joint 15 is connected to the material-gas integrated multilayer cavity 13, and after spraying, the nozzle and the gas nozzle outlet are flushed with clean water to prevent the paint from crusting.

[0056] In this embodiment, after spraying is completed, the control system switches to the water channel mode, and clean water is used to flush the inner and outer walls of the nozzle and the air nozzle outlet to remove residual latex paint, thereby ensuring a stable atomization effect during the next spraying.

[0057] In a specific embodiment, the nozzle is provided with an inner circle of air holes and an outer circle of air holes, which correspond to the gas passages of the central atomizing gas path 136 and the fan-shaped atomizing gas path 134 respectively.

[0058] In this embodiment, when spraying latex paint, the inner circle air holes input central atomizing gas to form a conical atomizing area, and the outer circle air holes input fan-shaped atomizing gas to shape the atomized paint to avoid uneven atomization caused by air flow mixing.

[0059] In a specific embodiment, the fan-shaped atomizing gas path 134 merges with the central atomizing gas path 136 when spraying a thick build-up coating, so as to increase the central atomizing gas flow rate.

[0060] In this embodiment, when spraying real stone paint, the gas in the fan-shaped atomizing air path 134 flows into the central atomizing air chamber, increasing the central air flow pressure, so that the high-viscosity paint is fully atomized and evenly adhered to the wall surface.

[0061] In a specific embodiment, the valve core opening of the fast-opening electric ball valve 11 is adjustable, and the flow rate of the paint is controlled by a preset angle.

[0062] In this embodiment, when spraying delicate indoor walls, the valve core opening is adjusted to a small degree to reduce the paint flow to form a uniform thin layer; when spraying rough exterior wall substrates, the valve core opening is adjusted to a large degree to increase the paint coverage efficiency.

[0063] In a specific embodiment, the gun cap 17 is fixed to the material-gas integrated multi-layer chamber 13 by threaded connection, ensuring a tight fit between the gas nozzle and the nozzle.

[0064] In this embodiment, under high pressure spraying environment, the gun cap 17 is screwed and fixed with the conical air nozzle 29 by means of threads, so as to avoid displacement of the air nozzle due to vibration when spraying the real stone paint, thereby ensuring the continuity of spraying.

[0065] Taking multi-color paint and real stone paint as examples to represent thin-paste and thick-paste architectural coatings respectively, the working principle of a universal automatic spray gun for architectural coatings is explained:

[0066] like Figure 1As shown, when a general automatic spray gun for building coatings is used to spray thin slurry type coating latex paint, a nozzle 18 for latex paint is installed at a preset installation position of the nozzle of the material-gas integrated multi-layer cavity 13, and at the same time, a horn air nozzle 19 is matched with the nozzle 18 for latex paint through a shaped surface and locked with a gun cap 17.

[0067] The latex paint enters the valve body of the quick-opening electric ball valve 11 through the feed connector 12, and the valve core is controlled to open a certain angle according to the preset discharge amount. The paint enters the material cavity of the material-gas integrated multilayer cavity 13 through the valve core, and then reaches the outlet of the latex paint nozzle 18; at this time, the water circuit is closed and the gas circuit is opened; the central atomizing gas passes through the central atomizing gas circuit 136 of the material-gas integrated multilayer cavity 13, passes through the inner ring air hole of the latex paint nozzle 18, enters the horn air nozzle 19, and cooperates with the latex paint nozzle 18 through the shaped surface. The fan-shaped atomized gas passes through the fan-shaped atomizing gas path 134 of the material-gas integrated multi-layer cavity 13, passes through the outer circle air holes of the latex paint nozzle 18, enters the fan-shaped atomizing gas chamber formed by the cooperation of the horn air nozzle 19 with the latex paint nozzle 18 through the shaped surface, and finally flows out from the horn atomizing air holes of the horn air nozzle 19 to perform fan-shaped plasticity on the atomized latex paint.

[0068] After spraying continues for a period of time, the fast-switching electric ball valve 11 is controlled to close the material circuit, open the water circuit, and keep the gas circuit open; at this time, clean water enters the cavity of the material and gas integrated multi-layer cavity 13 through the water circuit joint 15, and the residual paint in the cavity and the nozzle for latex paint is flushed out, and the nozzle for the middle coating and the outlet of the horn air nozzle 19 are flushed under the combined action of the central atomizing gas and the fan-shaped atomizing gas to prevent the occurrence of skinning.

[0069] like Figure 3 As shown, when a general automatic spray gun for architectural coatings is used to spray thick-powder type coatings and real stone coatings, a nozzle 28 for real stone coatings is installed at a preset nozzle installation position of the material-gas integrated multi-layer cavity 13, and at the same time, a conical air nozzle 29 is matched with the nozzle 28 for real stone coatings through a shaped surface and locked with a gun cap 17. Fan-shaped atomization is not required for spraying thick-powder type coatings.

[0070] The real stone paint enters the valve body of the quick-switching electric ball valve 11 through the feed joint 12, and the valve core is controlled to open a certain angle according to the preset discharge amount. The paint enters the material cavity of the material-gas integrated multilayer cavity 13 through the valve core, and then reaches the outlet of the real stone paint nozzle 28; at this time, the water circuit is closed and the gas circuit is opened; the central atomizing gas enters the central atomizing air chamber formed by the surface matching of the real stone paint nozzle 28 and the conical air nozzle 29 through the central atomizing gas path 136 of the material-gas integrated multilayer cavity 13, and finally flows out from the atomizing air hole of the real stone paint nozzle 28, and mixes with the real stone paint in the outlet of the real stone paint nozzle 28 to generate central atomization; the fan-shaped atomizing gas enters the central atomizing air chamber formed by the surface matching of the real stone paint nozzle 28 and the conical air nozzle 29 through the fan-shaped atomizing gas path 134 of the material-gas integrated multilayer cavity 13, and merges with the central atomizing gas in the central atomizing air chamber to increase the flow rate of the central atomizing gas.

[0071] After spraying continues for a period of time, the fast-switching electric ball valve 11 is controlled to close the material circuit, open the water circuit, and keep the gas circuit open; at this time, clean water enters the material and gas integrated multi-layer cavity 13 through the water circuit joint 15, and the residual paint in the cavity and the real stone paint nozzle 28 is flushed out, and the outlet of the real stone paint nozzle 28 and the conical air nozzle 29 are flushed under the combined action of the central atomizing gas and the fan-shaped atomizing gas to prevent the occurrence of skinning.

[0072] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A universal automatic spray gun for architectural coatings, characterized in that: include, Quick-on / off electric ball valve, used to control the on / off and flow of paint; A feed connector, fixedly connected to the feed end of the quick-opening electric ball valve, and used for connecting an external paint delivery pipeline; The material-gas integrated multilayer cavity is fixedly connected to the discharge end of the quick-opening electric ball valve, and is provided with a layered and isolated coating channel, a central atomizing gas path and a fan-shaped atomizing gas path; The central atomizing gas path connector and the fan-shaped atomizing gas path connector are independently connected to the material-gas integrated multilayer cavity component, respectively, for externally connecting an independently controlled gas source; A water channel connector, connected to the material-gas integrated multi-layer cavity, for externally connecting a flushing water channel; A nozzle is detachably mounted on the discharge end of the material-gas integrated multi-layer cavity; The gas nozzle forms an independent atomizing gas chamber by matching the shape and surface with the nozzle or the material-gas integrated multi-layer cavity; The gun cap is used for fixing the gas nozzle.

2. The universal automatic spray gun for architectural coatings according to claim 1, characterized in that: The coating channel, central atomizing gas path and fan-shaped atomizing gas path of the material-gas integrated multi-layer cavity are completely independent through physical barriers, and the gas flows of the central atomizing gas path and the fan-shaped atomizing gas path do not interfere with each other.

3. The universal automatic spray gun for architectural coatings according to claim 2, characterized in that: The coating passage of the material-gas integrated multi-layer cavity is arranged in the middle, the central atomizing gas path surrounds the outside of the coating passage, and the fan-shaped atomizing gas path surrounds the outside of the central atomizing gas path.

4. The universal automatic spray gun for architectural coatings according to claim 1, characterized in that: The atomizing air chamber formed by the cooperation of the gas nozzle and the spray nozzle comprises a central atomizing air chamber and a fan-shaped atomizing air chamber, which correspond to the independent gas inputs of the central atomizing air path and the fan-shaped atomizing air path respectively.

5. The universal automatic spray gun for architectural coatings according to claim 1, characterized in that: The nozzle and the air nozzle are replaceable components, including a horn air nozzle suitable for thin paste type paint and a conical air nozzle suitable for thick paste type paint.

6. The universal automatic spray gun for architectural coatings according to claim 1, characterized in that: The water channel joint is connected with the material-gas integrated multilayer cavity component, and after spraying, the nozzle and the gas nozzle outlet are flushed with clean water to prevent the paint from crusting.

7. The universal automatic spray gun for architectural coatings according to claim 1, characterized in that: The nozzle is provided with an inner circle of air holes and an outer circle of air holes, which correspond to the gas passages of the central atomizing gas path and the fan-shaped atomizing gas path respectively.

8. The universal automatic spray gun for architectural coatings according to claim 7, characterized in that: The fan-shaped atomizing gas path merges with the central atomizing gas path when spraying thick paste type coating, so as to increase the central atomizing gas flow rate.

9. The universal automatic spray gun for architectural coatings according to claim 1, characterized in that: The valve core opening of the quick-opening electric ball valve is adjustable, and the flow rate of the paint is controlled by a preset angle.

10. The universal automatic spray gun for architectural coatings according to claim 1, characterized in that: The gun cap is fixed to the material-gas integrated multi-layer cavity part by threaded connection, ensuring the close fit between the gas nozzle and the nozzle.

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