Spray gun assembly suitable for coating spray liquid with large viscosity

Abstract

The utility model discloses a spray gun assembly suitable for coating spray liquid with large viscosity, and relates to the technical field of coating spray gun equipment, the spray gun assembly comprises a pipe body, a rotating block is rotatably connected to the position, close to the output end, in the pipe body, a limiting ball is arranged in the rotating block, and an air pipe is rotatably connected to the interior of the limiting ball; and a nozzle with the inner diameter being decreased and then increased suddenly is formed in the position, close to the output end of the pipe body, of the air pipe, a plurality of inclined guide grooves are formed in the gap between the limiting ball and the rotating block, and liquid outlets matched with the nozzle are formed in the positions, close to the nozzle, of the guide grooves. High-speed gas is sprayed out through the gas spraying opening of the gas pipe, rotating liquid sprayed out of the liquid outlet is scattered and diffused outwards, due to the effect of centrifugal force, the liquid can be diffused outwards again in the diffusion process, and therefore the coverage range of the liquid sprayed out of the device is enlarged; therefore, no residual liquid exists at the output end of the device.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of coating spray gun equipment, specifically to a spray gun assembly suitable for coating liquid with large viscosity. BACKGROUND

[0002] Coating is a technology of coating one or more layers of protective or functional material on the surface of particles or tablets of drugs, seeds, food, etc., and the coating technology is widely used in many industries, including pharmaceutical, agricultural, food, etc.

[0003] The traditional coating manufacturing process is to place tablets, particles or food to be coated in a coating pot or a fluidized bed, uniformly spray the coating liquid on the surface of the material through a spray gun, control the pot temperature, speed and spray gun parameters, make the coating liquid form a uniform and smooth film on the surface of the material, then evaporate the solvent in the coating liquid by heating or ventilation, gradually dry and solidify the coating film, form a thin film coating with certain mechanical strength and stability, and finally check the coated material to ensure that the coating film is uniform, defect-free and meets the quality requirements.

[0004] The current market spray gun will have problems such as reduced spraying area and residual in the nozzle when facing liquid with large viscosity, affecting the use effect of the spray gun, therefore, a spray gun assembly suitable for liquid with large viscosity is designed. UTILITY MODEL CONTENT

[0005] Therefore, the utility model aims to provide a spray gun assembly suitable for coating liquid with large viscosity to solve the technical problem of poor effect of the traditional device when facing viscous liquid.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a spray gun assembly suitable for coating liquid with large viscosity, comprising a pipe body, a rotating block is rotatably connected to the inside of the pipe body near the output end, a limiting ball is arranged in the rotating block, an air pipe is rotatably connected to the inside of the limiting ball, and an outlet with an inner diameter that suddenly increases after suddenly decreasing is arranged at the output end of the air pipe, a plurality of inclined guide grooves are arranged at the gap between the limiting ball and the rotating block, a liquid outlet matched with the outlet is arranged at the outlet, a pressurized liquid delivery device is installed on one side of the pipe body away from the output end, a gas injection device is installed at one end of the air pipe away from the outlet, the gas injection device is an air compressor, and the pressurized liquid delivery device is a gas pressure type high-pressure water injection device.

[0007] By adopting the technical scheme, high-pressure liquid is input into the pipe body from the pressurized infusion device, then the liquid flows into the guide groove between the rotating block and the limiting ball for distribution, because the guide groove is inclined, the liquid drives the limiting ball to rotate and is finally sprayed from the liquid outlet, at the same time, compressed gas is input into the air pipe in the air jet device, according to Bernoulli's principle, the gas expands rapidly and is sprayed when passing through the nozzle with suddenly increased inner diameter, then the high-speed gas pushes the liquid sprayed from the liquid outlet, the liquid is dispersed and diffused outward, and the liquid is diffused outward again under the action of centrifugal force, so that the coverage range of the liquid sprayed by the device is increased, and in addition, there is no residual liquid at the output end of the device because the liquid outlet is impacted by the high-speed gas at all times.

[0008] The utility model further sets up, the outside of air pipe is connected with the limiting piece that limiting ball slidingly connects.

[0009] By adopting the technical scheme, the limiting piece limits the relative position between the air pipe and the limiting ball, and in addition, liquid can be prevented from flowing out from the gap between the air pipe and the limiting ball, so that liquid waste is reduced.

[0010] The utility model further sets up, a plurality of ball bearings are installed between the limiting piece and the limiting ball.

[0011] By adopting the technical scheme, the ball bearings are used to reduce the friction between the pipe body and the limiting ball, so that the limiting ball rotates more smoothly.

[0012] In summary, the utility model mainly has the following beneficial effects:

[0013] The utility model sprays high-speed gas from the air jet outlet of the air pipe, disperses and diffuses the liquid sprayed from the liquid outlet, and the liquid is diffused outward again under the action of centrifugal force, so that the coverage range of the liquid sprayed by the device is increased, and in addition, there is no residual liquid at the output end of the device because the liquid outlet is impacted by the high-speed gas at all times. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the whole structure schematic view of the utility model;

[0015] Figure 2 It is the whole structure lateral section view of the utility model;

[0016] Figure 3 It is the whole structure lateral half section schematic view of the utility model;

[0017] Figure 4 It is the whole structure downward half section schematic view of the utility model;

[0018] Figure 5 For the present utility model Figure 4 Enlarged view of the structure at point A in the middle.

[0019] In the diagram: 1. Tube body; 2. Jet device; 3. Pressurized infusion device; 4. Limiting ball; 5. Limiting block; 6. Ball bearing; 7. Guide groove; 8. Outlet; 9. Nozzle; 10. Rotating block; 11. Air tube. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0021] The embodiments of this utility model will be described below based on its overall structure.

[0022] A spray gun assembly suitable for coating liquids with high viscosity, such as Figures 1-5 As shown, the device includes a pipe body 1. A rotating block 10 is rotatably connected inside the pipe body 1 near the output end. A limiting ball 4 is installed inside the rotating block 10. An air pipe 11 is rotatably connected inside the limiting ball 4. A nozzle 9 with a rapidly increasing inner diameter is located near the output end of the air pipe 11. Several inclined guide grooves 7 are formed in the gap between the limiting ball 4 and the rotating block 10. A liquid outlet 8 that matches the nozzle 9 is formed near the guide grooves 7. A pressurized infusion device 3 is installed on the side of the pipe body 1 away from the output end. A jetting device 2, which is an air compressor, is installed on the end of the air pipe 11 away from the nozzle 9. The pressurized infusion device 3 is a pneumatic high-pressure water jetting device. High-pressure liquid is input into the pipe body 1 from the pressurized infusion device 3. The liquid then flows into the guide groove 7 between the rotating block 10 and the limiting ball 4 for diversion. Because the guide groove 7 is an inclined curve, the liquid will drive the limiting ball 4 to rotate during this period and eventually be ejected from the liquid outlet 8. At the same time, compressed gas is input into the air pipe 11 from the jet device 2. According to Bernoulli's principle, the gas will expand rapidly and be ejected when it passes through the nozzle 9, which has a small inner diameter and then suddenly increases. Then, the high-speed gas pushes the liquid ejected from the liquid outlet 8, dispersing the liquid outward. Due to the centrifugal force, the liquid will diffuse outward again during the diffusion process, thereby increasing the coverage area of ​​the liquid ejected by the device. In addition, because the liquid outlet 8 is constantly impacted by the high-speed gas, there will be no residual liquid at the output end of the device.

[0023] The trachea 11 is externally connected to a limiting block 5 that is slidably connected to the limiting ball 4. The function of the limiting block 5 is to limit the relative position between the trachea 11 and the limiting ball 4. In addition, it can prevent liquid from flowing out from the gap between the trachea 11 and the limiting ball 4, thus reducing liquid waste.

[0024] A plurality of rolling balls 6 are installed between the limiting block 5 and the limiting ball 4, and the rolling balls 6 are used to reduce the friction between the pipe body 1 and the limiting ball 4, so that the limiting ball 4 rotates more smoothly.

[0025] Working principle: high-pressure liquid is input into the pipe body 1 from the pressurized infusion device 3, and then the liquid is shunted in the guide groove 7 between the rotating block 10 and the limiting ball 4, and since the guide groove 7 is an inclined curve, the liquid will drive the limiting ball 4 to rotate and finally be sprayed out from the liquid outlet 8, during which, the limiting block 5 can limit the relative position between the air pipe 11 and the limiting ball 4, and also prevent the liquid from flowing out from the gap between the air pipe 11 and the limiting ball 4, reducing the waste of liquid, and the rolling balls 6 can be used to reduce the friction between the pipe body 1 and the limiting ball 4, so that the limiting ball 4 rotates more smoothly, at the same time, compressed gas is input into the air pipe 11 in the air jet device 2, according to Bernoulli's principle, the gas will rapidly expand and be sprayed out when passing through the nozzle 9 with a sudden increase in inner diameter, then the high-speed gas pushes the liquid sprayed out from the liquid outlet 8, disperses and expands outward, and due to the centrifugal force, the liquid will further expand outward during the dispersion process, thereby increasing the coverage range of the liquid sprayed out by the device, in addition, since the liquid outlet 8 is always impacted by high-speed gas, there will be no residual liquid at the output end of the device.

[0026] On the basis of the above structure, in the embodiment, although the embodiments of the utility model have been shown and described, the specific embodiments are only an explanation of the utility model, and are not a limitation of the utility model, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner, and the person skilled in the art can make modifications, replacements and variations of the embodiments without creative contribution after reading the specification without departing from the principles and purposes of the utility model, but as long as it is within the scope of the claims of the utility model, it is protected by the patent law.

Claims

1. A spray gun assembly suitable for use with a coating fluid having a relatively high viscosity, comprising a body (1), characterised in that: The inner part of the pipe body (1) is rotationally connected with a rotating block (10) near the output end, and the rotating block (10) is provided with a limiting ball (4) inside, the inner part of the limiting ball (4) is rotationally connected with an air pipe (11), and the air pipe (11) is provided with a spout (9) with a gradually decreasing inner diameter and then suddenly increasing near the output end of the pipe body (1), a plurality of inclined guide grooves (7) are arranged in the gap between the limiting ball (4) and the rotating block (10), and the guide groove (7) is provided with a liquid outlet (8) matched with the spout (9) near the spout (9).

2. A spray gun assembly suitable for use with a coating fluid having a relatively high viscosity according to claim 1, wherein: The side of the pipe body (1) away from the output end is provided with a pressurized infusion device (3), and the end of the air pipe (11) away from the spout (9) is provided with an air jet device (2).

3. A spray gun assembly suitable for use with a coating fluid having a relatively high viscosity according to claim 2, wherein: The air jet device (2) is an air compressor, and the pressurized infusion device (3) is a gas pressure type high-pressure water jet device.

4. A spray gun assembly suitable for use with a coating fluid having a relatively high viscosity according to claim 1, wherein: The outer part of the air pipe (11) is connected with a limiting block (5) in sliding connection with the limiting ball (4).

5. A spray gun assembly suitable for use with a coating fluid having a relatively high viscosity according to claim 4, wherein: A plurality of ball bearings (6) are arranged between the limiting block (5) and the limiting ball (4).

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