Spraying machine with adjustable ratio

Abstract

The utility model provides a ratio-adjustable spraying machine which comprises a machine frame, a plunger pump installed on the machine frame and used for pressurizing, an air pump used for providing high-pressure air for the plunger pump, a feeding pipe used for inputting coating into the plunger pump and a spraying gun used for spraying the coating in the plunger pump, and the plunger pump comprises two main pumps and an auxiliary pump. The feeding pipe comprises two main material pipes connected with the two main pumps respectively and an auxiliary pressure pipe connected with the auxiliary pump, the auxiliary pump is connected with the two main pumps through the adjusting valve, and the auxiliary pump is used for providing auxiliary suction force for one main pump when the suction force of the main pump is insufficient. According to the utility model, the auxiliary pump is used for supplementing a preset suction value to the specified main pump, two coatings needing different proportioning relations can be sucked at the same time through simple control, different proportioning mixing can be realized in the plunger pump, the function of the existing coating machine is greatly expanded, the whole auxiliary pump structure has no influence on the whole, and the cost is reduced. The application range of the coating machine is widened, and meanwhile the cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of spraying, specifically to a spraying machine that can adjust the feed amount of different raw materials according to the mixing ratio of the coating. Background Technology

[0002] Currently, in industries such as leather goods, handbags, gift packaging, furniture, footwear, and automobile manufacturing, coating machines are generally used for spraying different shades of paint. A conventional coating machine includes one or two feed pipes to transport different colors of paint, which are then pressurized by gas in a cylinder before being sprayed out by a spray gun.

[0003] Existing spraying machines can only suck in pre-mixed paint; that is, the spraying machine simply pressurizes the pre-mixed paint and sprays it out, and does not have the function of mixing paint itself.

[0004] However, some paints cannot be mixed before spraying. For example, some paints will generate high temperature, clump, or volatilize after being mixed for a long time. Therefore, they can only be mixed during spraying. These processes can only be done by mixing before feeding them into the spraying machine. However, the time between mixing and spraying is not easy to control, or spraying may be temporarily stopped for some reason. All of these will affect the use of paint and the final spraying effect. Utility Model Content

[0005] The purpose of this invention is to provide a spraying machine that can adjust the feed rate of different raw materials according to the coating ratio.

[0006] Specifically, this utility model provides a spraying machine with adjustable mixing ratio, including a frame, a plunger pump mounted on the frame for pressurization, an air pump for supplying high-pressure gas to the plunger pump, a feed pipe for inputting paint into the plunger pump, and a spray gun for spraying the paint out of the plunger pump.

[0007] The plunger pump includes two main pumps and one auxiliary pump. The feed pipe includes two main feed pipes connected to the two main pumps respectively, and an auxiliary pressure pipe connected to the auxiliary pump. The auxiliary pump is connected to the two main pumps respectively through a regulating valve. The auxiliary pump is used to provide supplementary suction to one of the main pumps.

[0008] In one embodiment of this utility model, the auxiliary pump is connected to an auxiliary air pump via an auxiliary pressure pipe.

[0009] In one embodiment of this utility model, the main pump and the auxiliary pump are simultaneously connected to the output piston of the air pump via a connecting plate.

[0010] In one embodiment of this utility model, a pressure ring, multiple stacked V-shaped sealing rings, a bottom ring, and a locking nut are sequentially installed on the auxiliary piston inside the auxiliary pump. The contact surfaces of the pressure ring and the bottom ring with the V-shaped sealing ring are mating surfaces with corresponding shapes.

[0011] In one embodiment of the present invention, an auxiliary plate for placing the auxiliary air pump is installed at the bottom of the frame.

[0012] This invention supplements a predetermined suction value to a designated main pump via an auxiliary pump. With simple control, it can simultaneously draw two types of paint that require different mixing ratios. It can also achieve different mixing ratios within the plunger pump, greatly expanding the functionality of existing paint machines. Moreover, the entire auxiliary pump structure has no impact on the overall design, thus improving the application range of the paint machine while reducing costs. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a spraying machine according to one embodiment of the present invention;

[0014] Figure 2 This is a schematic diagram of the piston sealing structure of the plunger pump of this utility model. Detailed Implementation

[0015] This invention addresses the shortcomings of existing coating machines. Therefore, the specific principles and working methods of the coating machines will not be described in detail in the following embodiments. Instead, the improvements of this invention will be explained in detail.

[0016] This utility model discloses an adjustable mixing sprayer, comprising a frame 1 providing a mounting base and a movable structure. A plunger pump 2, which pressurizes, mixes, and atomizes the paint, is mounted on the frame 1. An air pump 3 provides high-pressure gas to the plunger pump 2. A feed pipe 4 inputs paint into the plunger pump 2. A spray gun 5 sprays the paint from the plunger pump 2. The plunger pump 2 includes two main pumps 21 and one auxiliary pump 22. The feed pipe 4 includes two main feed pipes 41 connected to the two main pumps 21 respectively, and an auxiliary pressure pipe 42 connected to the auxiliary pump 22. The two main feed pipes 41 respectively deliver different paints. After the two paints are mixed and atomized in the plunger pump 2, they can be sprayed out by the spray gun 5. The paints to be mixed are generally made of corrosion-resistant and stain-resistant materials, and usually require different mixing ratios to achieve the desired effect.

[0017] Since the pressurization of the two main pumps 21 by the air pump 3 is a synchronous operation, the suction volume of the two main material pipes 41 is the same, that is, the amount of the two coatings sucked in at the same time is the same, which is equivalent to a 1:1 mixing ratio. When the mixing ratio between the two coatings is asymmetrical, such as 1:2 or 3:2, the two main material pipes 41 cannot achieve the corresponding mixing ratio by simultaneously sucking in the same amount. In this embodiment, the auxiliary pump 22 is connected to the two main pumps 21 through the regulating valve 23. The auxiliary pump 22 is used to provide supplementary suction to one of the main pumps 21. The suction of the main pump 21 with supplementary suction is greater than that of the other main pump 21 per unit time, and thus its suction volume of the corresponding coating exceeds that of the other main pump 21. By converting the suction volume of the two main material pipes 41, the mixing ratio of the two coatings sucked in at the same time per unit time can be adjusted, which greatly expands the application range of the coating machine.

[0018] The auxiliary pump 22 is connected to different main pumps 21 via the control valve 23. The commonly used mixing ratio is converted into a predetermined specification. The auxiliary pump 22 can be controlled by a knob to supplement the designated main pump 21 with a predetermined suction value. With simple control, two paints that require different mixing ratios can be drawn at the same time. Different mixing ratios can also be achieved inside the plunger pump 2. This greatly expands the function of the existing paint machine. Moreover, the entire auxiliary pump structure has no impact on the overall structure. This not only improves the application range of the paint machine, but also reduces the cost.

[0019] In this embodiment, the auxiliary pump 22 can share an air pump 3 with the main pump 21. That is, when the air pump 3 pressurizes the main pump 21, it also pressurizes the auxiliary pump 22. However, the auxiliary pump 22 converts the pressurization of the air pump 3 into a supplement to one of the main pumps 21. When the auxiliary pump 22 is not needed, its connection with the two main pumps 21 can be shut off.

[0020] To facilitate connection of the air pump 3, a connecting plate 6 is installed at the output end of the air pump piston 31 of the air pump 3. One end of the plunger pump piston 24 in the two main pumps 21 and the auxiliary pump 22 is fixed on the connecting plate 6. When the air pump 3 uses the air pump piston 31 to drive the connecting plate 6 to move, it will drive the three plunger pump pistons 24 of the two main pumps 21 and the auxiliary pump 22 to move simultaneously.

[0021] Furthermore, to reduce the impact on air pump 3, an auxiliary air pump 7 is added in this embodiment. The auxiliary air pump 7 can be connected separately to the auxiliary pump 22 via the auxiliary pressure pipe 42 to provide it with a certain suction force. Since the air pump pressure of the existing paint machine is already set, installing the auxiliary pump 22 may cause insufficient power to the existing air pump 3. Using the auxiliary air pump 7 can avoid affecting the performance of the existing air pump 3, and it is also convenient to adjust the power of the auxiliary air pump 7 according to the application range of the paint machine, which reduces costs without affecting the effect of the existing paint machine itself.

[0022] To facilitate the placement of the auxiliary air pump 7, an auxiliary plate 8 for placing the auxiliary air pump 7 can be installed at the bottom of the frame 1.

[0023] The auxiliary pump 22 moves synchronously with the main pump 21 under the drive of the air pump 3. At the same time, the auxiliary pump 22 provides auxiliary suction to the main pump 21 in sync with its suction action to avoid pressure compensation failure caused by asynchronous action between the main pump 21 and the auxiliary pump 22.

[0024] To improve the sealing effect of the plunger pump piston 24 inside the auxiliary pump 22, a pressure ring 241, multiple stacked V-shaped sealing rings 242, a bottom ring 243, and a locking nut 244 are sequentially installed on the plunger pump piston 24 inside the auxiliary pump 22. The pressure ring 241 is used to contact the bottom of the plunger pump piston 24, while the bottom ring 243 prevents damage to the V-shaped sealing rings 242 when the locking nut 244 is tightened on the top of the plunger pump piston 24. Multiple V-shaped sealing rings 242 form a V-shaped sealing ring group, which is used to form a moving seal between the plunger pump piston 24 and the inner surface of the auxiliary pump 22 when the plunger pump piston 24 moves inside the auxiliary pump 22. Because the upper part of the cross-section of the V-shaped sealing rings 242 is grooved and the lower part is conical protrusion, they can fit tightly together, improving the sealing effect. In addition, to improve the sealing effect with the pressure ring 241 and the bottom ring 243, the contact surfaces of the pressure ring 241 and the bottom ring 243 with the V-shaped sealing rings 242 are mating surfaces corresponding to their shapes.

[0025] Therefore, those skilled in the art should recognize that although many exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all such other variations or modifications.

Claims

1. An adjustable ratio spray machine, comprising a machine frame (1), a plunger pump (2) installed on the machine frame (1) for pressurization, an air pump (3) for providing high pressure gas to the plunger pump (2), a feed pipe (4) for inputting paint into the plunger pump (2), and a spray gun (5) for spraying paint in the plunger pump (2), characterized in that: the plunger pump (2) comprises two main pumps (21) and an auxiliary pump (22), the feed pipe (4) comprises two main pipes (41) respectively connected to the two main pumps (21) and an auxiliary pipe (42) connected to the auxiliary pump (22), the auxiliary pump (22) is connected to the two main pumps (21) through a regulating valve (23), and the auxiliary pump (22) is used to provide additional suction for one of the main pumps (21).

2. The adjustable ratio spray machine according to claim 1, characterized in that: the auxiliary pump (22) is connected to an auxiliary air pump (7) through the auxiliary pipe (42).

3. The adjustable ratio spray machine according to claim 1, characterized in that: the main pumps (21) and the auxiliary pump (22) are connected to an output piston (31) of the air pump (3) through a connecting plate (6).

4. The adjustable ratio spray machine according to claim 1, characterized in that: a plunger pump piston (24) installed in the auxiliary pump (22) is sequentially provided with a pressing ring (241), a plurality of stacked V-shaped sealing rings (242), a bottom ring (243), and a locking nut (244), and the contact surfaces of the pressing ring (241) and the bottom ring (243) and the V-shaped sealing ring (242) are corresponding and fitted surfaces.

5. The adjustable ratio spray machine according to claim 2, characterized in that: an auxiliary plate (8) for placing the auxiliary air pump (7) is installed at the bottom of the machine frame (1). ​ ​ ​ ​ ​

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