Coating defoaming device

Abstract

The utility model relates to the technical field of coating defoaming, and provides a coating defoaming device which comprises a dispersing tank, the dispersing tank comprises a first tank body, a stirring shaft vertically arranged on the axis of the first tank body and a first driving mechanism arranged on the first tank body and used for driving the stirring shaft to rotate, a defoaming disc is arranged on the upper section of the stirring shaft, and the defoaming disc is arranged on the lower section of the stirring shaft. A dispersing disc is arranged at the lower section of the stirring shaft; and the defoaming disc can be lifted up and down on the liquid level of the coating in a reciprocating manner to extrude and defoam. The device has an obvious effect on eliminating foam on the liquid level, the degree of dependence on a defoaming agent is reduced, the foam can be quickly and uniformly removed, and a certain cost can be saved. And meanwhile, a positive effect is also achieved on the dispersion effect.

Description

Technical Field

[0001] This utility model relates to the field of paint defoaming technology, specifically a paint defoaming device. Background Technology

[0002] Paint dispersers are primarily designed for crushing, dispersing, emulsifying, and mixing liquid raw materials of varying viscosities. These high-efficiency mixing devices utilize the high-speed rotation of the upper and lower serrated dispersion discs to subject materials to high-speed, intense shearing, impact, crushing, and dispersion, achieving rapid mixing, dissolving, dispersing, and refining. They are highly efficient equipment for stirring, dispersing, and dissolving solids such as paints. However, existing high-speed dispersers, when mixing and preparing oil-based paint pigments, generate significant amounts of foam during dispersion due to the high-speed rotation. If this foam is not eliminated, it can cause defects in the resulting coating, affecting the coating effect. Therefore, removing foam from the paint during dispersion is crucial in paint preparation.

[0003] CN114100410A discloses a defoaming device for the production of water-based exterior wall coatings, including a dispersion tank and a base. The dispersion tank is fixedly installed on the top surface of the base, and a dilution tank is installed on one side of the dispersion tank. A coupling is fixedly installed at the center of the top surface of the dispersion tank. This patent document uses a dilution tank, a rotating pipe, an upper branch pipe, and a lower branch pipe to allow defoamer to enter the rotating pipe from the delivery pipe, then flow into the upper and lower branch pipes. The defoamer flowing into the upper branch pipe is sprayed onto the mixture above the surface of the mixture through a nozzle, thereby eliminating foam on the top surface. Simultaneously, the defoamer flowing into the lower branch pipe flows out through a drain hole and disperses into the interior of the mixture, facilitating the elimination of foam inside the mixture during stirring and dispersion. This method uniformly distributes defoamer inside and outside the mixture, ultimately achieving uniform and rapid defoaming. However, since foam always concentrates on the liquid surface during dispersion, the above patent requires a continuous consumption of a large amount of defoamer to achieve rapid defoaming by simply spraying defoamer to eliminate foam on the liquid surface.

[0004] Therefore, the technical problem to be solved in this case is: how to further optimize the coating defoaming device. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides a coating defoaming device. This device is effective in eliminating foam on the liquid surface, reducing dependence on defoamers, and can quickly and uniformly defoam while saving costs. It also has a positive effect on dispersion.

[0006] The technical solution of this utility model is:

[0007] A defoaming device for coatings includes a dispersion tank. The dispersion tank includes a first tank body, a stirring shaft vertically arranged on the axis of the first tank body, and a first driving mechanism arranged on the first tank body for driving the stirring shaft to rotate. The upper section of the stirring shaft is provided with a defoaming disc, and the lower section of the stirring shaft is provided with a dispersion disc. The defoaming disc can reciprocate up and down above the surface of the coating to squeeze and defoam.

[0008] One of the above-described technical solutions of this utility model has at least one of the following advantages or beneficial effects:

[0009] This invention utilizes a defoaming disc on a stirring shaft that continuously moves up and down the surface of the coating, thereby squeezing out the foam and achieving defoaming. It not only significantly eliminates foam on the liquid surface, reducing reliance on defoamers, but also further disperses the upper layer of coating. This method achieves rapid and uniform defoaming, saves costs, and improves dispersion efficiency. Attached Figure Description

[0010] Figure 1 This is a schematic diagram illustrating the operation of Embodiment 1 of this utility model;

[0011] Figure 2 This is a schematic diagram of the defoaming plate in Embodiment 1 of this utility model.

[0012] The labels in the image are as follows:

[0013] Dispersion tank 1; First tank body 11; Inlet 111; Outlet 112; Defoaming disc 101; Dispersion disc 102; Stirring shaft 12; First drive mechanism 13; Slider 14; Mixing tank 2; Second tank body 21; Main pipe 211; Branch pipe 212; Mixing shaft 22; Mixing disc 103; Second drive mechanism 23; Suction pump 3; Through hole a; Tip b; Threaded groove c. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Example 1

[0016] Please see Figure 1 , 2A defoaming device for coatings includes a dispersion tank 1. The dispersion tank 1 includes a first tank body 11, a stirring shaft 12 vertically arranged on the axis of the first tank body 11, and a first drive mechanism 13 arranged on the first tank body 11 for driving the stirring shaft 12 to rotate. The upper section of the stirring shaft 12 is provided with a defoaming disc 101, and the lower section of the stirring shaft 12 is provided with a dispersion disc 102. The defoaming disc 101 can reciprocate up and down on the surface of the coating to squeeze and defoam.

[0017] In practical applications, the first drive mechanism 13 is a motor. Driven by the motor, the defoaming disc 101 on the upper part of the stirring shaft 12 continuously moves up and down on the surface of the coating, while the dispersing disc 102 at the lower end of the stirring shaft 12 continuously rotates in the coating.

[0018] In this embodiment, the defoaming disc 101 on the stirring shaft 12 continuously moves up and down the surface of the coating, thereby squeezing out the foam and achieving defoaming. This not only significantly eliminates foam on the surface of the liquid, reducing dependence on defoamers, but also further disperses the upper layer of coating. It achieves rapid and uniform defoaming, saves costs, and improves dispersion efficiency.

[0019] In this embodiment, specifically, the upper section of the stirring shaft 12 is provided with threaded grooves c with the same pitch but opposite directions of rotation and a slider 14 that reciprocates and moves up and down on the threaded grooves c; the defoaming disc 101 is connected to the slider 14. It should be noted that the slider 14 is a ball bearing slider 14. In other embodiments, in order to ensure the stability of the defoaming disc 101, a vertical guide column connected to the top of the first tank 11 can also be added to the defoaming disc 101.

[0020] In this embodiment, more specifically, the upper section of the stirring shaft 12 is a reciprocating lead screw. Preferably, the reciprocating lead screw is fixed to the lower end of the stirring shaft 12 by a threaded connection, and the direction of its thread should be opposite to the rotation direction of the first drive mechanism 13.

[0021] With the above design, the defoaming disc 101 can continuously move up and down under the drive of the first drive mechanism 13, and the distance of the movement can be determined as needed according to the length of the thread groove c of the reciprocating screw, which effectively improves the applicability of this device.

[0022] In a preferred embodiment, the defoaming disc 101 is a circular disc, and it has multiple through holes a. Preferably, the multiple through holes a are arranged in a circular array around the center of the disc. Here, the main function of the through holes a is to prevent the defoaming disc 101 from excessively squeezing the liquid surface, which would cause irregular shaking of the coating in the first tank 11 and affect the dispersion disc 102, or even damage the dispersion disc 102 and the stirring shaft 12. Of course, in other embodiments, to further avoid the above problems, an arc-shaped guide groove can also be provided on the defoaming disc 101.

[0023] As a further preferred embodiment, in order to improve defoaming efficiency and ensure stable defoaming, the bottom of the defoaming disk 101 is provided with a plurality of pointed tips b for piercing defoaming. Preferably, the plurality of pointed tips b are arranged in a circular array along the center circumference of the disk.

[0024] In practical applications, the first tank 11 has a feed inlet 111 at the top and a discharge outlet 112 at the bottom; both the feed inlet 111 and the discharge outlet 112 are equipped with on / off valves. The raw materials for the coating are poured into the first tank 11 through the feed inlet 111, and after dispersion, they are discharged from the discharge outlet 112.

[0025] It should be noted that a liquid level sensor (not shown in the figure) is installed inside the first tank 11. This liquid level sensor is to ensure that the liquid level inside the first tank 11 is within the lifting range of the defoaming plate 101.

[0026] In addition, this embodiment also includes a mixing tank 2 for preparing defoamer. The mixing tank 2 includes a second tank body 21, a mixing shaft 22 vertically arranged on the axis of the second tank body 21, and a second driving mechanism 23 arranged on the second tank body 21 for driving the mixing shaft 22 to rotate. The first tank body 11 and the second tank body 21 are connected by pipes. A mixing disc 103 is provided on the mixing shaft 22.

[0027] Under the above design, in addition to defoamers, mixing tank 2 can also mix other materials that can be added to the first tank 11, such as thickeners, emulsifiers, etc.

[0028] As a preferred embodiment, a suction pump 3 is provided between the first tank 11 and the second tank 21; the suction pump 3 is used to transfer the defoamer in the second tank 21 to the defoaming plate 101 in the first tank 11.

[0029] As a further preferred embodiment, the top of the first tank 11 is provided with multiple addition ports; the second tank 21 is connected to multiple addition port pipes. Specifically, the defoamer in the second tank 21 is output to multiple branch pipes 212 through a main pipe 211, and the branch pipes 212 are connected to the addition ports one by one. In this embodiment, the multiple addition ports are arranged in a circumferential array along the axis, so that the defoamer is evenly sprayed on the upper surface of the defoaming disc 101, and then carried into the coating through the through hole a on the defoaming disc 101, which plays a role in evenly dispensing the defoamer for rapid defoaming, and can further improve the defoaming efficiency.

[0030] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A coating defoaming device, comprising a dispersion tank, the dispersion tank including a first tank body, a stirring shaft vertically arranged on the axis of the first tank body, and a first drive mechanism arranged on the first tank body for driving the stirring shaft to rotate, characterized in that, The upper section of the stirring shaft is provided with a defoaming disc, and the lower section of the stirring shaft is provided with a dispersing disc; the defoaming disc can reciprocate up and down on the surface of the coating to squeeze out foam; the upper section of the stirring shaft is provided with threaded grooves of the same pitch but opposite direction of rotation and a slider that reciprocates up and down on the threaded grooves; the defoaming disc is connected to the slider; the upper section of the stirring shaft is a reciprocating lead screw. It also includes a mixing tank for preparing defoamer, the mixing tank comprising a second tank body, a mixing shaft vertically arranged on the axis of the second tank body, and a second drive mechanism arranged on the second tank body for driving the mixing shaft to rotate; the first tank body and the second tank body are connected by pipes; and a mixing disc is provided on the mixing shaft.

2. The paint defoaming device according to claim 1, characterized in that, The defoaming plate is a disc, and it has multiple through holes.

3. The paint defoaming device according to claim 1, characterized in that, The bottom of the defoaming plate is equipped with multiple pointed tips for puncture and defoaming.

4. The paint defoaming device according to claim 1, characterized in that, The first tank has a feed inlet at the top and a discharge outlet at the bottom; both the feed inlet and the discharge outlet are equipped with switch valves.

5. The paint defoaming device according to claim 1, characterized in that, The first tank is equipped with a liquid level sensor.

6. The paint defoaming device according to claim 1, characterized in that, A suction pump is provided between the first tank and the second tank; the suction pump is used to transfer the defoamer in the second tank to the defoaming plate in the first tank.

7. The paint defoaming device according to claim 6, characterized in that, The top of the first tank is also provided with multiple filling ports; the second tank is connected to multiple filling port pipes.

Images