A rust-removing and paint-spraying integrated spray gun and a method for using the same

Abstract

This invention provides an integrated rust removal and painting spray gun and its usage method, including a main body, a nozzle, an airflow regulating pipe, and a paint spraying pipe. By placing the airflow regulating pipe in the cavity of the main body and the paint spraying pipe in the cavity of the airflow regulating pipe, this invention achieves an integrated rust removal and painting design, possessing three functions: rust removal, air spraying, and painting. It can be used in combination or individually, greatly improving the flexibility and selectivity of the device, and is particularly suitable for the complex ship cleaning work currently being carried out.

Description

Technical Field

[0001] This invention relates to the field of ship repair and manufacturing, specifically to an integrated rust removal and painting spray gun and its usage method. Background Technology

[0002] Rust removal and painting are crucial aspects of ship maintenance, with the quality of both directly impacting the ship's lifespan and safety. However, in practice, rust removal and painting are two distinct processes. Rust removal primarily aims to remove rust from the hull surface, while painting focuses on protecting the hull and enhancing its appearance. These two processes differ in their workflow, material selection, and application methods, making integrated design difficult. Summary of the Invention

[0003] To address the technical challenge of integrating rust removal and painting into a single design, this invention provides an integrated rust removal and painting spray gun and its usage method. By placing the airflow regulating pipe inside the cavity of the main body and the paint spraying pipe inside the cavity of the airflow regulating pipe, an integrated rust removal and painting design is achieved. It has three functions: rust removal, air spraying, and painting. It can be used in combination or individually, greatly improving the flexibility and selectivity of the device, and is particularly suitable for the complex ship cleaning work currently being carried out.

[0004] The present invention achieves the above-mentioned technical objectives through the following technical means.

[0005] A rust removal and painting integrated spray gun, characterized in that it includes a main body, a nozzle, an airflow regulating pipe and a paint spraying pipe;

[0006] The main body has a hollow internal structure, the outlet end of the main body has an open structure, the inlet end of the main body has a first through hole connecting the inner cavity of the pipe to the atmosphere, and the bottom of the main body has a third through hole connecting the inner cavity of the pipe to the liquid inlet pipe.

[0007] The nozzle is disposed at the outlet end of the main body, and a second through hole is provided on the nozzle opposite to the first through hole;

[0008] The airflow regulating pipe penetrates the cavity of the main body. The outlet end of the airflow regulating pipe is located in the second through hole, and the inlet end of the airflow regulating pipe passes through the first through hole and extends to the outside of the main body. The outer diameter of the airflow regulating pipe is the same as the inner diameter of the first through hole and smaller than the inner diameter of the second through hole. The airflow regulating pipe has a cavity structure inside. The inlet end and outlet end of the airflow regulating pipe are respectively provided with a fourth through hole and a fifth through hole. The airflow regulating pipe has an air inlet for air to enter the cavity of the airflow regulating pipe and an air outlet connecting the cavity of the airflow regulating pipe with the cavity of the main body. The airflow regulating pipe has a T-shaped groove. The bottom of the T-shaped groove connects to the cavity of the airflow regulating pipe. A baffle plate and a guide block fixed to the bottom of the baffle plate are slidably arranged in the T-shaped groove. The guide block passes through the T-shaped groove and extends into the cavity of the airflow regulating pipe. One end of the baffle plate is fixed to the airflow regulating pipe by a spring. Pushing the guide block in the jet direction can drive the baffle plate to block the air outlet. When the thrust disappears, the baffle plate resets under the action of the spring.

[0009] The paint spray pipe passes through the cavity of the airflow regulating pipe. The outlet end of the paint spray pipe is located in the fifth through hole, and the inlet end of the paint spray pipe passes through the fourth through hole and extends to the outside of the airflow regulating pipe. The inside of the paint spray pipe is a cavity structure, and the inlet end and outlet end of the paint spray pipe are respectively provided with a sixth through hole and a seventh through hole. The paint spray pipe is composed of a large diameter section, a variable diameter section and a small diameter section in sequence along the spray direction. The outer diameter of the large diameter section is the same as the inner diameter of the fourth through hole, and the outer diameter of the small diameter section is the same as the inner diameter of the fifth through hole. The guide block on the baffle plate falls exactly on the variable diameter section of the paint spray pipe.

[0010] Furthermore, it also includes a paint bucket and a high-pressure pump for supplying topcoat to the spray nozzle, an ice pellet storage tank and a pneumatic pump for delivering high-pressure ice pellet jets to the liquid inlet pipe, and a high-pressure gas cylinder connected to the air inlet pipe.

[0011] Furthermore, the gas inside the high-pressure gas tank is helium, and the gas temperature is 60℃~80℃.

[0012] Furthermore, a variable diameter sleeve is fitted onto the outlet end of the airflow regulating pipe. The outer diameter of the variable diameter sleeve gradually increases along the spraying direction, and an eighth through hole with an inner diameter consistent with the outer diameter of the paint spray pipe is opened on the variable diameter sleeve.

[0013] Furthermore, the maximum outer diameter range of the variable diameter sleeve is 0.1 to 2 mm.

[0014] Furthermore, the first through hole and the airflow regulating pipe, the fourth through hole and the paint spraying pipe, and the fifth through hole and the paint spraying pipe are all threaded connections.

[0015] Furthermore, the inner wall of the main body is provided with a first fixing block for fixing the airflow regulating pipe, and the airflow regulating pipe is connected to the first fixing block by a thread; the inner wall of the airflow regulating pipe is provided with a second fixing block for fixing the paint spraying pipe, and the paint spraying pipe is connected to the second fixing block by a thread.

[0016] Furthermore, the axial length of the baffle plate is greater than the axial length of the air outlet.

[0017] Furthermore, the outer wall surface of the baffle plate is coated with an Al2O3 coating to improve the lubrication effect.

[0018] The method of using the rust removal and painting integrated spray gun described in any of the above-mentioned items includes the following steps:

[0019] S1: Rust removal:

[0020] S1.1: A variable diameter sleeve is fitted onto the outlet end of the airflow regulating pipe, and the size of the variable diameter sleeve is selected according to the actual situation;

[0021] S1.2: Continue pushing the paint spray tube into the airflow regulating tube until it can no longer be pushed in. At this time, the baffle plate blocks the air outlet under the push of the variable diameter section of the paint spray tube.

[0022] S1.3: Connect the liquid inlet pipe to the air pump, start the air pump, and the ice jet in the ice storage tank enters the main cavity along the liquid inlet pipe and is ejected from the annular surface between the second through hole and the variable diameter sleeve to start the rust removal work.

[0023] S2: Drying:

[0024] S2.1: Turn off the air pump and liquid inlet pipe, twist the paint spray tube outward, and the baffle plate will reset under the action of the spring, exposing the air outlet;

[0025] S2.2: Connect the high-pressure gas tank and the airflow regulating pipe, and start delivering high-pressure hot air into the airflow regulating pipe. The high-pressure hot air is ejected from the annular surface between the second through hole and the variable diameter sleeve and blown toward the area to be dried on the ship.

[0026] S3: Spray painting: The paint bucket, high-pressure pump and spray pipe are connected in sequence. The topcoat is sprayed out from the seventh through hole along the spray pipe and directed toward the area to be painted.

[0027] The beneficial effects of this invention are as follows:

[0028] 1. This invention achieves an integrated rust removal and painting design by placing the airflow regulating pipe inside the ice particle jet channel and the paint spraying pipe inside the airflow regulating pipe. The integrated rust removal and painting spray gun can not only perform drying and painting treatments sequentially after rust removal, but also has the function of each of the three working independently. Compared with traditional spray guns, its flexibility and selectivity are greatly improved, and it has high industrial value.

[0029] 2. The paint spray pipe in this invention has a "thick at the front and thin at the back" structure. This slope design not only provides propulsion power for the guide block on the baffle plate, but also increases the flow rate and dynamic pressure of the sprayed paint, while improving the stability of paint spraying.

[0030] 3. This invention uses high-temperature and high-pressure gas to dry the rust-removed ship wall surface, which not only improves the adhesion of subsequent paint to the ship wall surface, but also prevents cold crystallization at the spray nozzle. At the same time, the residual temperature in the airflow regulating pipe after drying can preheat the paint in the paint spraying pipe, improve the fluidity of the paint, and enhance the painting effect. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the integrated rust removal and painting spray gun (spray gun only) of the present invention;

[0032] Figure 2 This is a schematic diagram of the T-shaped groove described in this invention;

[0033] Figure 3 This is a schematic diagram of the integrated rust removal and painting spray gun (including paint bucket, ice storage box, and high-pressure air tank) of the present invention.

[0034] The attached figures are labeled as follows:

[0035] 1-Main body; 2-Nozzle; 3-Airflow regulating pipe; 4-Paint spray pipe; 5-Air outlet; 6-Baffle plate; 7-Guide block; 8-Paint bucket; 9-High pressure pump; 10-Ice storage tank; 11-Air pressure pump; 12-High pressure air tank; 13-Variable diameter sleeve; 14-First fixing block; 15-Second fixing block; 16-Liquid inlet pipe. Detailed Implementation

[0036] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but the scope of protection of the present invention is not limited thereto.

[0037] The rust removal and painting integrated spray gun described in this embodiment includes a main body 1, a nozzle 2, an airflow regulating pipe 3, and a paint spraying pipe 4, with the specific structure as follows: Figure 1 As shown.

[0038] The main body 1 has a hollow internal structure, the outlet end of the main body 1 has an open structure, the inlet end of the main body 1 has a first through hole connecting the inner cavity of the pipe to the atmosphere, and the bottom of the main body 1 has a third through hole connecting the inner cavity of the pipe to the liquid inlet pipe 16.

[0039] The nozzle 2 is disposed on the outlet end of the main body 1, and a second through hole is provided on the nozzle 2 opposite to the first through hole.

[0040] The airflow regulating pipe 3 penetrates the cavity of the main body 1. The outlet end of the airflow regulating pipe 3 is located within the second through hole, and the inlet end of the airflow regulating pipe 3 passes through the first through hole and extends to the outside of the main body 1. The first through hole and the airflow regulating pipe 3 are connected by a thread. The outer diameter of the airflow regulating pipe 3 is the same as the inner diameter of the first through hole but smaller than the inner diameter of the second through hole. A first fixing block 14 for fixing the airflow regulating pipe 3 is also provided on the inner wall of the main body 1. The airflow regulating pipe 3 and the first fixing block 14 are connected by a thread. The airflow regulating pipe 3 has an internal cavity structure, and a fourth through hole and a fifth through hole are respectively provided at the inlet and outlet ends of the airflow regulating pipe 3. The airflow regulating pipe 3 has an air inlet for allowing air to pass into its cavity and an air outlet 5 connecting the inner cavity of the airflow regulating pipe 3 with the inner cavity of the main body 1. The airflow regulating pipe 3 has a T-shaped groove. Figure 2 The diagram shows the structure of the T-shaped groove described in this embodiment. The bottom of the T-shaped groove connects to the inner cavity of the airflow regulating pipe 3. An air baffle 6 and a guide block 7 fixed to the bottom of the air baffle 6 are slidably disposed within the T-shaped groove. The axial length of the air baffle 6 is greater than the axial length of the air outlet 5. An Al2O3 coating is applied to the outer wall of the air baffle 6 to improve lubrication. The guide block 7 passes through the T-shaped groove and extends into the inner cavity of the airflow regulating pipe 3. One end of the air baffle 6 is fixed to the airflow regulating pipe 3 by a spring. Pushing the guide block 7 along the injection direction can cause the air baffle 6 to block the air outlet 5. When the thrust disappears, the air baffle 6 resets under the force of the spring.

[0041] The paint spray pipe 4 passes through the cavity of the airflow regulating pipe 3. The outlet end of the paint spray pipe 4 is located in the fifth through hole, and the inlet end of the paint spray pipe 4 passes through the fourth through hole and extends to the outside of the airflow regulating pipe 3. The fourth through hole and the paint spray pipe 4, as well as the fifth through hole and the paint spray pipe 4, are threaded connections. The inner wall of the airflow regulating pipe 3 is also provided with a second fixing block 15 for fixing the paint spray pipe 4, and the paint pipe is threadedly connected to the second fixing block 15. The paint spray pipe 4 has a hollow internal structure, and the inlet end and outlet end of the paint spray pipe 4 are respectively provided with a sixth through hole and a seventh through hole. The paint spray pipe 4 consists of a large-diameter section, a variable-diameter section and a small-diameter section in sequence along the spray direction. The outer diameter of the large-diameter section is the same as the inner diameter of the fourth through hole, and the outer diameter of the small-diameter section is the same as the inner diameter of the fifth through hole. The guide block 7 on the baffle plate 6 falls exactly on the variable-diameter section of the paint spray pipe 4.

[0042] Furthermore, a variable diameter sleeve 13 is fitted onto the outlet end of the airflow regulating pipe 3. The outer diameter of the variable diameter sleeve 13 gradually increases along the spray direction, with a maximum outer diameter of 0.5 mm. An eighth through hole with an inner diameter consistent with the outer diameter of the paint spray pipe 4 is provided on the variable diameter sleeve 13.

[0043] Figure 3 The figure shows a schematic diagram of the integrated rust removal and painting spray gun (including a paint bucket, an ice pellet storage tank, and a high-pressure gas cylinder) of the present invention. As shown in the figure, the present invention also includes a paint bucket 8 and a high-pressure pump 9 for supplying topcoat to the paint spray pipe 4, an ice pellet storage tank 10 and a pneumatic pump 11 for conveying high-pressure ice pellet jets to the liquid inlet pipe 16, and a high-pressure gas cylinder 12 connected to the air inlet pipe for conveying high-pressure hot gas flow into the airflow regulating pipe 3. The gas in the high-pressure gas cylinder 12 is helium, and the helium temperature is 60℃~80℃.

[0044] The method of using the integrated rust removal and painting spray gun described in this embodiment for rust removal and painting includes the following steps:

[0045] S1: Rust removal:

[0046] S1.1: A variable diameter sleeve 13 with a maximum diameter of 0.5 mm is fitted onto the outlet end of the airflow regulating pipe 3.

[0047] S1.2: Continue pushing the paint spray pipe 4 into the airflow regulating pipe 3 until it can no longer be pushed in. At this time, the baffle plate 6 blocks the air outlet 5 under the push of the variable diameter section of the paint spray pipe 4.

[0048] S1.3: Connect the liquid inlet pipe 16 to the air pressure pump 11, start the air pressure pump 11, and the ice jet in the ice storage tank 10 enters the cavity of the main body 1 along the liquid inlet pipe 16 and is ejected from the annular surface between the second through hole and the variable diameter sleeve 13 to start the rust removal work.

[0049] S2: Drying:

[0050] S2.1: Turn off the air pump 11 and the liquid inlet pipe 16, twist the paint spray pipe 4 outward, and the baffle plate 6 will reset under the action of the spring, exposing the air outlet 5.

[0051] S2.2: Connect the high-pressure gas tank 12 and the airflow regulating pipe 3, and start to deliver high-pressure hot airflow into the airflow regulating pipe 3. The high-pressure hot airflow is ejected from the annular surface between the second through hole and the variable diameter sleeve 13 and blown toward the area to be dried on the ship.

[0052] S3: Spray painting: The paint bucket 8, high-pressure pump 9 and spray pipe 4 are connected in sequence. The topcoat is sprayed out from the seventh through hole along the spray pipe 4 and directed toward the area to be painted.

[0053] The embodiments described above are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments. Any obvious improvements, substitutions or modifications that can be made by those skilled in the art without departing from the essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A rust removal and paint application integrated spray gun, characterized by, The paint spraying device comprises a main body (1), a nozzle (2), an air flow adjusting pipe (3) and a paint spraying pipe (4). The main body (1) is internally provided with a cavity structure, the outlet end of the main body (1) is provided with an opening structure, the first through hole is formed on the inlet end of the main body (1) to communicate the inner cavity of the pipe with the atmosphere, and the third through hole is formed on the bottom of the main body (1) to communicate the inner cavity of the pipe with the liquid inlet pipe (16). The nozzle (2) is arranged on the outlet end of the main body (1), and the second through hole is formed on the nozzle (2) to communicate with the first through hole. The air flow adjusting pipe (3) penetrates the cavity of the main body (1), the outlet end of the air flow adjusting pipe (3) is arranged in the second through hole, the inlet end of the air flow adjusting pipe (3) penetrates the first through hole and extends to the outside of the main body (1), the outer diameter of the air flow adjusting pipe (3) is consistent with the inner diameter of the first through hole and smaller than the inner diameter of the second through hole, the inner cavity of the air flow adjusting pipe (3) is provided with the fourth through hole and the fifth through hole, the inlet end and the outlet end of the air flow adjusting pipe (3) are respectively provided with the fourth through hole and the fifth through hole, the air inlet and the air outlet (5) are formed on the air flow adjusting pipe (3) to communicate the inner cavity of the air flow adjusting pipe (3) with the inner cavity of the main body (1), the T-shaped groove is formed on the air flow adjusting pipe (3), the bottom of the T-shaped groove communicates with the inner cavity of the air flow adjusting pipe (3), the air baffle (6) and the guide block (7) are slidably arranged in the T-shaped groove, the guide block (7) penetrates the T-shaped groove and extends to the inner cavity of the air flow adjusting pipe (3), one end of the air baffle (6) is fixed on the air flow adjusting pipe (3) through the spring, and the air baffle (6) is pushed to block the air outlet (5) along the direction of the guide block (7), and the air baffle (6) is reset under the action of the spring when the pushing force disappears. The paint spraying pipe (4) penetrates the cavity of the air flow adjusting pipe (3), the outlet end of the paint spraying pipe (4) is arranged in the fifth through hole, and the inlet end of the paint spraying pipe (4) penetrates the fourth through hole and extends to the outside of the air flow adjusting pipe (3), the inner cavity of the paint spraying pipe (4) is provided with the sixth through hole and the seventh through hole, the paint spraying pipe (4) is sequentially composed of the large-diameter section, the variable-diameter section and the small-diameter section along the direction of the guide block (7), the outer diameter of the large-diameter section is consistent with the inner diameter of the fourth through hole, and the outer diameter of the small-diameter section is consistent with the inner diameter of the fifth through hole, and the guide block (7) on the air baffle (6) is just arranged on the variable-diameter section of the paint spraying pipe (4).

2. The rust removal and paint application integrated spray gun according to claim 1, characterized by, The paint spraying device further comprises a paint bucket (8) and a high-pressure pump (9) for providing the paint spraying pipe (4) with the top paint, an ice particle storage tank (10) and a gas pressure pump (11) for delivering the high-pressure ice particle jet to the liquid inlet pipe (16), and a high-pressure gas tank (12) in communication with the air inlet pipe.

3. The rust removal and paint application integrated spray gun according to claim 2, characterized by, The gas in the high-pressure gas tank (12) is helium, and the temperature of the gas is 60-80 DEG C.

4. The rust removal and paint application integrated spray gun according to claim 1, wherein The outlet end of the airflow adjusting pipe (3) is sleeved with a variable-diameter sleeve (13), the outer diameter of the variable-diameter sleeve (13) gradually increases along the spraying direction, and the variable-diameter sleeve (13) is provided with an eighth through hole with an inner diameter consistent with the outer diameter of the paint spraying pipe (4).

5. The rust removal and paint application integrated spray gun according to claim 4, wherein The maximum outer diameter of the variable-diameter sleeve (13) ranges from 0.1 to 2 mm.

6. The rust removal and paint application integrated spray gun according to claim 1, wherein The first through hole is threadedly connected with the airflow adjusting pipe (3), the fourth through hole is threadedly connected with the paint spraying pipe (4), and the fifth through hole is threadedly connected with the paint spraying pipe (4).

7. The rust removal and paint application integrated spray gun according to claim 1, wherein The inner wall of the main body (1) is provided with a first fixing block (14) for fixing the airflow adjusting pipe (3), and the airflow adjusting pipe (3) is threadedly connected with the first fixing block (14); the inner wall of the airflow adjusting pipe (3) is provided with a second fixing block (15) for fixing the paint spraying pipe (4), and the paint spraying pipe (4) is threadedly connected with the second fixing block (15).

8. The rust removal and paint application integrated spray gun according to claim 1, wherein The axial length of the air baffle (6) is greater than the axial length of the air outlet (5).

9. The rust removal and paint application integrated spray gun according to claim 1, wherein The outer wall surface of the air baffle (6) is coated with an Al2O3 coating for improving the lubrication effect.

10. The use method of the rust removal and paint spraying integrated spray gun according to any one of claims 1-9, comprising the following steps: S1: rust removal: S1.1: sleeving a variable-diameter sleeve (13) on the outlet end of the airflow adjusting pipe (3), the size of the variable-diameter sleeve (13) being selected according to actual conditions; S1.2: continuously pushing the paint spraying pipe (4) into the airflow adjusting pipe (3) until it cannot be pushed in, at which time the air baffle (6) is blocked against the air outlet (5) under the pushing of the variable-diameter section of the paint spraying pipe (4); S1.3: connecting the liquid inlet pipeline (16) with the air pressure pump (11), starting the air pressure pump (11), and the ice particle jet in the ice particle storage box (10) entering the cavity of the main body (1) along the liquid inlet pipeline (16) and being ejected from the annular surface between the second through hole and the variable-diameter sleeve (13) to start the rust removal work; S2: drying: S2.1: closing the air pressure pump (11) and the liquid inlet pipeline (16), and twisting the paint spraying pipe (4) outward, so that the air baffle (6) is reset under the action of the spring force to expose the air outlet (5); S2.2: connecting the high-pressure gas tank (12) with the airflow adjusting pipe (3) to start conveying high-pressure hot air flow into the airflow adjusting pipe (3), and the high-pressure hot air flow is ejected from the annular surface between the second through hole and the variable-diameter sleeve (13) and blown to the area to be dried on the ship; S3: paint spraying: sequentially connecting the paint bucket (8), the high-pressure pump (9), and the paint spraying pipe (4), and the topcoat is sprayed from the seventh through hole of the paint spraying pipe (4) to the area to be painted.

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