Air cleaning spray gun for spraying polyurea coating

Abstract

The utility model discloses an air cleaning spray gun for spraying polyurea paint, which comprises a gun handle, a spray gun body connected with the gun handle, a trigger connected with the spray gun body, a mixing chamber nozzle moving along the axial direction of the spray gun body, a spray head cover connected with the mixing chamber nozzle, an anti-backflow component and an airflow flowing component, the anti-backflow assembly comprises an installation ring arranged on the outer side of the spray head cover in a sleeving mode, an anti-backflow cover connected with the side face of the installation ring, a connecting ring connected with the surface of the other end of the anti-backflow cover, partition plates installed on the inner wall of the anti-backflow cover at equal intervals, and air outlet nozzles evenly distributed on the side face, away from the anti-backflow cover, of the connecting ring. The anti-backflow cover shields coating particles, air is inflated into the fixed ring pipe, the air is sprayed out from the air outlet nozzle, the effects that air flows at a certain flow speed within the range covered by the anti-backflow cover, flowing of airflow in the anti-backflow cover is accelerated, and the situation that atomized and dissipated polyurea coating particles stay for a long time and adhere to the interior of the mixing chamber nozzle is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of polyurea coating spraying equipment, and in particular relates to an air cleaning spray gun used for spraying polyurea coating. Background Art

[0002] Polyurea coating is a coating that adopts a one-time coating process. It is also a dust-free material polyurea coating with the characteristics of strong adhesion, friction resistance, and high hardness. The spraying of polyurea coating adopts a paint spraying gun. The working principle of the paint spraying gun is to use the compressed air to release quickly as power. When in use, the air inlet interface of the paint spraying gun is connected to the compressed air source. The compressed air is used to atomize the polyurea coating into fine paint droplets, which are sprayed onto the surface of the workpiece driven by the air flow to complete the spraying of the polyurea coating.

[0003] When a paint spray gun sprays polyurea paint, the polyurea paint is atomized into fine paint droplets and is sprayed out driven by airflow. Although the airflow drives the atomized polyurea paint, the atomized polyurea paint particles escape near the spray gun muzzle. When spraying at intervals, the escaped atomized polyurea paint particles adhere to the nozzle, and even the atomized polyurea paint flows back into the nozzle hole and accumulates, affecting the smooth spraying of the nozzle hole. When the paint spray gun is in use, there is a problem of not accelerating the design of the flow of atomized and escaped polyurea paint particles near the spray gun muzzle. For this reason, the present application proposes an air cleaning spray gun for spraying polyurea paint. Utility Model Content

[0004] The utility model aims to provide an air cleaning spray gun for spraying polyurea coatings, so as to solve the design problem of the spray gun in the above background technology that the flow of atomized polyurea coating particles near the spray gun nozzle is not accelerated.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an air cleaning spray gun for spraying polyurea coating, comprising a gun handle, a spray gun body connected to the gun handle, a trigger connected to the spray gun body, a mixing chamber nozzle moving along the axial direction of the spray gun body and a nozzle cover connected to the mixing chamber nozzle, and also comprising an anti-backflow component and an airflow flow component, the anti-backflow component comprising a mounting ring sleeved on the outside of the nozzle cover, an anti-backflow cover connected to the side of the mounting ring, a connecting ring connected to the other end surface of the anti-backflow cover, a partition plate equidistantly mounted on the inner wall of the anti-backflow cover, and air outlet nozzles evenly distributed on the side of the connecting ring away from the anti-backflow cover, a collecting chamber is provided inside the anti-backflow cover, and an air inlet connected to the collecting chamber is provided on the surface of the anti-backflow cover, the airflow flow component comprises an air supply pipe installed on the side of the connecting ring away from the air outlet nozzle, a fixed ring pipe connected to the other end of the air supply pipe, and a connecting rod installed between the mounting ring and the fixed ring pipe.

[0006] Preferably, a first annular cavity connected to a gas outlet nozzle is provided in the anti-backflow cover, and the inner surface of the connecting ring is spirally connected with evenly distributed gas collecting nozzles, and the gas collecting nozzles are funnel-shaped.

[0007] Preferably, the backflow prevention cover is a hollow conical structure, a narrow end of the backflow prevention cover is connected to the mounting ring, a wide end of the backflow prevention cover is connected to the connecting ring, and the collecting chamber inside the backflow prevention cover is connected to the first ring chamber.

[0008] Preferably, the cross section of the annular partition plate is a semicircular ring shape.

[0009] Preferably, a second annular cavity is provided inside the fixed annular tube, the air delivery pipe of the hollow structure is connected to the connecting ring and the fixed annular tube, and an air inlet nozzle is provided on the fixed annular tube.

[0010] Preferably, a mixing chamber cavity is provided inside the spray gun body, a sealing ring is provided in the spray gun body located in the mixing chamber cavity, a gap between the opposing sealing rings is a cavity e, and a connecting flow channel and a nozzle flow channel are provided on the mixing chamber nozzle.

[0011] Preferably, the air cleaning intake flow path on the spray gun body is the intake flow channel d, the mixing chamber cavity, the connecting flow channel and the nozzle flow channel in sequence.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] In the utility model, the backflow prevention cover shields atomized polyurea coating particles contained in the air over a large area, inflates the inside of the fixed ring tube, and the gas is ejected from the air outlet nozzle, so that the air in the range covered by the backflow prevention cover flows at a certain flow rate, and the air flow inside the backflow prevention cover is accelerated. The design has the effect of accelerating the flow of atomized polyurea coating particles near the spray gun muzzle, and preventing the atomized polyurea coating particles from staying for a long time and adhering to the nozzle of the mixing chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is a cross-sectional structural schematic diagram of the backflow prevention cover of the utility model;

[0016] Figure 3 It is a side view structural schematic diagram of the backflow prevention cover of the utility model;

[0017] Figure 4 It is a schematic diagram of the cross-sectional structure of the spray gun body of the utility model when spraying paint;

[0018] Figure 5It is a schematic cross-sectional view of the spray gun body of the utility model when the spray gun body sprays out air for cleaning;

[0019] In the figure: 1. gun handle; 2. spray gun body; 3. nozzle cover; 4. backflow prevention cover; 5. fixed ring pipe; 6. gas supply pipe; 11. trigger; 21. mixing chamber nozzle; 22. sealing ring; 23. mixing chamber cavity; 41. connecting ring; 42. mounting ring; 43. partition plate; 44. collecting cavity; 45. air inlet; 51. connecting rod; 211. connecting flow channel; 212. nozzle flow channel; 411. air outlet nozzle; 412. air collecting nozzle. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Example

[0022] See also Figures 1 to 5The utility model provides a technical solution: an air cleaning spray gun for spraying polyurea coating, comprising a gun handle 1, a spray gun body 2 connected to the gun handle 1, a trigger 11 connected to the spray gun body 2, a mixing chamber nozzle 21 moving along the axial direction of the spray gun body 2, and a nozzle cover 3 connected to the mixing chamber nozzle 21, and also comprising an anti-backflow component and an air flow component. When the trigger 11 is pulled, the mixing chamber nozzle 21 in the spray gun body 2 connected to the air intake source sprays the polyurea coating, and the sprayed polyurea coating escapes from the outside of the nozzle cover 3, so as to realize the spraying of the polyurea coating on the surface of the workpiece. The principle of applying polyurea coating is conventional technology, and this application will not elaborate on it in detail; the anti-backflow component includes a mounting ring 42 sleeved on the outside of the nozzle cover 3, an anti-backflow cover 4 connected to the side of the mounting ring 42, a connecting ring 41 connected to the other end surface of the anti-backflow cover 4, a partition plate 43 equidistantly mounted on the inner wall of the anti-backflow cover 4, and air outlet nozzles 411 evenly distributed on the side of the connecting ring 41 away from the anti-backflow cover 4. The anti-backflow cover 4 is mounted on the outside of the nozzle cover 3 to block the atomized polyurea coating particles in a large range, and prevent the atomized polyurea coating particles from flowing back into the interior of the mixing chamber nozzle 21. The backflow prevention cover 4 is provided with a collecting chamber 44 inside and an air inlet 45 connected to the collecting chamber 44 on the surface of the backflow prevention cover 4. The partition plate 43 plays a role in adhering the atomized polyurea coating particles to prevent the polyurea coating particles from escaping from the backflow prevention cover 4 to the inside of the mixing chamber nozzle 21; the air flow assembly includes an air delivery pipe 6 installed on the side of the connecting ring 41 away from the air outlet nozzle 411, a fixed ring pipe 5 connected to the other end of the air delivery pipe 6, and a connecting rod 51 installed between the mounting ring 42 and the fixed ring pipe 5. The fixed ring pipe 5 is connected to an external air intake source to inflate the fixed ring pipe 5. The gas enters the gas delivery pipe 6 from the fixed ring pipe 5, and is transported to the interior of the connecting ring 41 along the direction b, and then the gas is ejected from the gas outlet nozzle 411. The internal air pressure of the connecting ring 41 changes as the internal air flow flows, and the gas in the anti-backflow cover 4 enters the collecting chamber 44 from the air inlet 45, and then enters the interior of the connecting ring 41. In addition, the gas also enters the interior of the connecting ring 41 from the gas collecting nozzle 412, and the gas in the connecting ring 41 is ejected from the gas outlet nozzle 411, which accelerates the effect of the air flow inside the anti-backflow cover 4 and prevents the atomized and dispersed polyurea coating particles from staying for a long time and adhering to the mixing chamber nozzle 21.

[0023] In this embodiment, a first annular cavity connected to an air outlet nozzle 411 is provided in the anti-backflow hood 4, and the inner surface of the connecting ring 41 is spirally connected to uniformly distributed air collecting nozzles 412, and the air collecting nozzles 412 are funnel-shaped. Gas also enters the interior of the connecting ring 41 from the air collecting nozzles 412, which is conducive to the flow of atomized polyurea coating particles in the air.

[0024] In this embodiment, the backflow prevention cover 4 is a hollow conical structure, one end of the backflow prevention cover 4 with a narrow diameter is connected to the mounting ring 42, and one end of the backflow prevention cover 4 with a wide diameter is connected to the connecting ring 41. The collecting chamber 44 inside the backflow prevention cover 4 is connected to the first ring chamber, and the internal gas of the backflow prevention cover 4 enters the collecting chamber 44 from the air inlet 45, and then enters the first ring chamber of the connecting ring 41, which is conducive to the discharge of air containing atomized polyurea coating particles.

[0025] In this embodiment, the cross section of the annular partition plate 43 is a semicircular ring shape. The partition plate 43 and the backflow shield 4 are combined by a conventional method. The partition plate 43 and the backflow shield 4 adhere to the atomized polyurea coating particles.

[0026] In this embodiment, a second ring cavity is provided inside the fixed ring tube 5, and a hollow air supply pipe 6 connects the connecting ring 41 and the fixed ring tube 5. An air inlet nozzle is provided on the fixed ring tube 5, and the air inlet nozzle on the fixed ring tube 5 is connected to an external air inlet source to inflate the fixed ring tube 5. The gas enters the air supply pipe 6 from the fixed ring tube 5 and is transported to the inside of the connecting ring 41 along the direction b, and then the gas is ejected from the air outlet nozzle 411.

[0027] In this embodiment, a mixing chamber cavity 23 is provided inside the spray gun body 2, a sealing ring 22 is provided inside the mixing chamber cavity 23, a gap between the opposing sealing rings 22 is a cavity e, a connecting flow channel 211 and a nozzle flow channel 212 are provided on the mixing chamber nozzle 21, and the air cleaning air intake flow path on the spray gun body 2 is the intake flow channel d, the mixing chamber cavity 23, the connecting flow channel 211 and the nozzle flow channel 212 in sequence. When spraying polyurea coating, the clean air is closed, and the sealing ring 22 blocks the air. The polyurea coating enters the cavity e through the air cleaning air intake flow path, and then enters the nozzle flow channel 212 from the connecting flow channel 211, and is finally sprayed out; when air cleaning is performed, the mixing chamber nozzle 21 moves, and the connecting flow channel 211 is connected with the mixing chamber cavity 23. The air flows along the air cleaning air intake flow path formed by the intake flow channel d, the mixing chamber cavity 23, the connecting flow channel 211 and the nozzle flow channel 212 to achieve an air cleaning effect. The air cleaning principle of the spray gun body 2 is a conventional technology and will not be described in detail in this application.

[0028] The working principle and use process of this utility model:

[0029] The spray gun body 2 is designed to accelerate the flow of atomized polyurea paint particles near the spray gun muzzle. The backflow prevention cover 4 is installed on the outside of the nozzle cover 3 to block the atomized polyurea paint particles in a large range. The inner surface of the backflow prevention cover 4 and the partition plate 43 play a role in adhering the atomized polyurea paint particles to prevent the atomized polyurea paint particles from flowing back into the interior of the mixing chamber nozzle 21.

[0030] The fixed ring tube 5 is connected to an external air source, and air is inflated into the fixed ring tube 5. The air enters the air delivery pipe 6 from the fixed ring tube 5, and is transported to the inside of the connecting ring 41 along the direction b, and then the air is ejected from the air outlet nozzle 411;

[0031] The internal air flow of the connecting ring 41 changes the internal air pressure, and the gas in the anti-backflow cover 4 enters the collecting chamber 44 from the air inlet 45, and then enters the interior of the connecting ring 41;

[0032] At the same time, the gas also enters the interior of the connecting ring 41 from the gas collecting nozzle 412, and the gas in the connecting ring 41 is ejected from the gas outlet nozzle 411, which accelerates the flow of air inside the anti-backflow shield 4 and prevents the atomized polyurea coating particles from staying for a long time and adhering to the mixing chamber nozzle 21;

[0033] In summary: the spray gun body 2 is designed to accelerate the flow of atomized polyurea paint particles near the spray gun muzzle, the anti-backflow cover 4 blocks the atomized polyurea paint particles contained in the air over a large area, inflates the fixed ring tube 5, and the gas is ejected from the air outlet nozzle 411, so that the air in the range covered by the anti-backflow cover 4 flows at a certain flow rate, accelerates the flow of air inside the anti-backflow cover 4, and prevents the atomized polyurea paint particles from staying for a long time and adhering to the mixing chamber nozzle 21.

[0034] Although the embodiments of the present invention have been shown and described (see the above detailed description for details), it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An air cleaning spray gun for spraying polyurea coating, comprising a gun handle (1), a spray gun body (2) connected to the gun handle (1), a trigger (11) connected to the spray gun body (2), a mixing chamber nozzle (21) movable along the axial direction of the spray gun body (2), and a spray head cover (3) connected to the mixing chamber nozzle (21), characterized in that: It also includes an anti-backflow component and an airflow component. The anti-backflow component includes a mounting ring (42) sleeved on the outside of the nozzle cover (3), an anti-backflow cover (4) connected to the side of the mounting ring (42), a connecting ring (41) connected to the other end surface of the anti-backflow cover (4), a partition plate (43) equidistantly mounted on the inner wall of the anti-backflow cover (4), and air outlet nozzles (411) evenly distributed on the side of the connecting ring (41) away from the anti-backflow cover (4). The anti-backflow cover (4) is provided with a collecting chamber (44) inside and an air inlet (45) connected to the collecting chamber (44) on the surface of the anti-backflow cover (4). The airflow component includes an air supply pipe (6) mounted on the side of the connecting ring (41) away from the air outlet nozzle (411), a fixed ring pipe (5) connected to the other end of the air supply pipe (6), and a connecting rod (51) mounted between the mounting ring (42) and the fixed ring pipe (5).

2. An air cleaning spray gun for spraying polyurea coating according to claim 1, characterized in that: A first annular cavity connected to the air outlet nozzle (411) is provided in the anti-backflow cover (4); the inner surface of the connecting ring (41) is spirally connected to evenly distributed air collecting nozzles (412); and the air collecting nozzles (412) are funnel-shaped.

3. An air cleaning spray gun for spraying polyurea coating according to claim 2, characterized in that: The backflow prevention cover (4) is a hollow conical structure. The narrow end of the backflow prevention cover (4) is connected to the mounting ring (42), the wide end of the backflow prevention cover (4) is connected to the connecting ring (41), and the collecting chamber (44) inside the backflow prevention cover (4) is connected to the first ring chamber.

4. The air cleaning spray gun for spraying polyurea coating according to claim 1, characterized in that: The cross section of the annular partition plate (43) is a semicircular ring shape.

5. The air cleaning spray gun for spraying polyurea coating according to claim 1, characterized in that: A second annular cavity is provided inside the fixed annular tube (5); the air delivery pipe (6) with a hollow structure is in communication with the connecting ring (41) and the fixed annular tube (5); and an air inlet nozzle is provided on the fixed annular tube (5).

6. The air cleaning spray gun for spraying polyurea coating according to claim 1, characterized in that: A mixing chamber cavity (23) is provided inside the spray gun body (2), a sealing ring (22) is provided inside the spray gun body (2) in the mixing chamber cavity (23), a gap between the opposing sealing rings (22) is a cavity e, and a communicating flow channel (211) and a nozzle flow channel (212) are provided on the mixing chamber nozzle (21).

7. An air cleaning spray gun for spraying polyurea coating according to claim 6, characterized in that: The air cleaning air intake flow path on the spray gun body (2) is an intake flow channel d, a mixing chamber cavity (23), a connecting flow channel (211) and a nozzle flow channel (212) in sequence.

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