Vacuum defoaming device for acrylic emulsion production

Abstract

The utility model discloses a vacuum defoaming device for acrylic emulsion production relates to vacuum defoaming device technical field, including jar body, its inside rotation is provided with the rotation rod of upper fixed setting and holds material tray, jar body fixedly arranged with feed pipe, the rotation rod is provided with the grid ring board of shading on the holding material tray periphery coaxially, the grid ring board is fixedly arranged with the grid baffle of shading on the vertical upper side of holding material tray, the grid baffle is located between feed pipe and holding material tray. The utility model provides a vacuum defoaming device for acrylic emulsion production, utilizes the grid baffle to shade on the upper side of holding material tray to avoid the situation that the excessive acrylic emulsion directly crosses the grid ring board and is thrown to the inner wall of material cylinder to improve the stability of the defoaming operation of the excessive acrylic emulsion, improve the defoaming effect of acrylic emulsion.

Description

Technical Field

[0001] This utility model relates to the technical field of vacuum degassing devices, specifically a vacuum degassing device for acrylic emulsion production. Background Technology

[0002] As is well known, in the production process of acrylic emulsions, after the emulsion polymerization is completed, vacuum degassing is required to remove residual air bubbles and unreacted monomer volatiles from the material. For example, after transferring the material from the reaction vessel to the emulsification vessel, vacuum is applied to remove the solvent and filter the particles, ultimately obtaining a bubble-free acrylic nanoemulsion.

[0003] For example, the utility model patent with application publication number CN221014618U, application publication date May 28, 2024, and titled "A Vacuum Degassing Device," describes a vacuum degassing device whose specific structure includes: a material cylinder, a rotary dispersion structure, a rotary motor, and a vacuum pump; the material cylinder has an inlet and an outlet at the top and a outlet at the bottom; the vacuum pump is connected to the outlet; the rotary dispersion structure is located inside the material cylinder and below the inlet; the rotary dispersion structure is an open-top accommodating structure; the side of the rotary dispersion structure has mesh-like filter holes; the output end of the rotary motor passes through the inside of the material cylinder and is connected to the central axis of the rotary dispersion structure; the rotary dispersion structure rotates under the drive of the rotary motor.

[0004] The shortcoming of the existing technology is that by filling the emulsion into the top opening of the rotating dispersion structure, the emulsion is spread flat on the surface of the chassis. The chassis and the enclosure rotate to throw the emulsion from the filter holes of the enclosure onto the inner wall of the material cylinder to complete the defoaming operation. However, vacuum defoaming is a continuous operation. When too much emulsion is filled into the chassis by the feed inlet, the excess emulsion on the rotating dispersion structure is difficult to be thrown out through the filter holes onto the inner wall of the material cylinder at the same time. This can easily cause the emulsion to flow parallel to the inner wall of the enclosure and then be thrown directly onto the inner wall of the material cylinder after passing over the enclosure. As a result, the vacuum defoaming effect is poor when too much emulsion is discharged. Utility Model Content

[0005] The purpose of this invention is to provide a vacuum degassing device for acrylic emulsion production, so as to solve the above-mentioned shortcomings in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a vacuum degassing device for acrylic emulsion production, comprising a tank body, inside which a rotating rod on which a material support tray is fixedly mounted is rotatably arranged; a feed pipe is fixedly mounted on the tank body; a mesh ring plate coaxially mounted on the rotating rod and covering the periphery of the material support tray is provided; a mesh baffle plate is fixedly mounted on the mesh ring plate and covering the vertical upper part of the material support tray; the mesh baffle plate is located between the feed pipe and the material support tray.

[0007] As a further description of the above technical solution: the top surface of the material tray is an inclined support surface in the shape of a cone, and the inner side of the inclined support surface is the low side.

[0008] As a further description of the above technical solution: the mesh ring plate is axially slidably mounted on the rotating rod so that the mesh baffle moves relative to the inclined support surface.

[0009] As a further description of the above technical solution: it also includes a flexible pad ring fixedly connected to the inner end of the material tray, the flexible pad ring being located on the outer ring side of the inclined support surface such that the outer ring side of the flexible pad ring abuts against the mesh ring plate.

[0010] As a further description of the above technical solution: when the mesh ring plate slides to the point where the mesh baffle abuts against the inclined support surface, the outer ring side of the flexible pad ring abuts against the connection between the mesh ring plate and the mesh baffle.

[0011] As a further description of the above technical solution: a sliding part is fixedly provided on the mesh baffle, and a sliding groove is provided on the rotating rod to slide and cooperate with the sliding part.

[0012] As a further description of the above technical solution: the rotating rod is made of stainless steel.

[0013] As a further description of the above technical solution: the mesh ring plate is made of stainless steel.

[0014] As a further description of the above technical solution: the flexible gasket ring is made of fluororubber.

[0015] As a further description of the above technical solution: the surface of the rotating rod is provided with a corrosion-resistant coating.

[0016] In the above technical solution, the present invention provides a vacuum degassing device for acrylic emulsion production, which uses a grid baffle to cover the material tray to prevent excessive acrylic emulsion from being thrown directly over the grid ring plate onto the inner wall of the material cylinder, thereby improving the stability of the degassing operation when there is excessive acrylic emulsion and improving the degassing effect of the acrylic emulsion. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model; Figure 2 This is a schematic cross-sectional view of the overall structure provided for an embodiment of the present utility model; Figure 3 An exploded structural diagram of the rotating rod, mesh ring plate, and flexible gasket ring provided in an embodiment of this utility model; Figure 4 Provided for the embodiments of this utility model Figure 2 A magnified schematic diagram of the local structure at point A.

[0019] Explanation of reference numerals in the attached figures: 1. Tank body; 11. Feed pipe; 2. Rotating rod; 21. Material support plate; 211. Inclined support surface; 22. Sliding groove; 3. Grid ring plate; 31. Grid baffle; 32. Sliding part; 4. Flexible gasket ring; 5. Drive cylinder; 9. Drive motor. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0021] Please see Figure 1-4 This utility model provides a technical solution: a vacuum degassing device for acrylic emulsion production, including a tank body 1, in which a rotating rod 2 is rotatably arranged and a material support tray 21 is fixedly arranged on the upper part. A feed pipe 11 is fixedly arranged on the tank body 1. A grid ring plate 3 is coaxially arranged on the rotating rod 2 to cover the periphery of the material support tray 21. A grid baffle 31 is fixedly arranged on the grid ring plate 3 to cover the vertical upper part of the material support tray 21. The grid baffle 31 is located between the feed pipe 11 and the material support tray 21.

[0022] Preferred, such as Figure 2 As shown, the rotating rod 2 drives the material tray 21 to rotate inside the tank 1, while the grid ring plate 3 is set on the rotating rod 2 to rotate synchronously with it. When the feed pipe 11 fills the tank 1 with acrylic emulsion, the acrylic emulsion flows downward from above the grid baffle 31 and is received by the material tray 21 after passing through the grid baffle 31. During the flow of the acrylic emulsion through the grid baffle 31, the grid baffle 31 can break the air bubbles carried in the acrylic emulsion to initially remove them. Then, the acrylic emulsion is spread out on the material tray 21 to further remove the air bubbles. Subsequently, under the action of the centrifugal force of the rotating rod 2, the acrylic emulsion passes through the grid ring plate 3 along the surface of the material tray 21 and is thrown onto the inner wall of the tank 1, thus completing the defoaming operation of the acrylic emulsion. When the acrylic emulsion is thrown out and passes through the grid ring plate 3, the grid ring plate 3 can break the air bubbles carried in the acrylic emulsion again, thereby improving the removal rate of air bubbles in the acrylic emulsion.

[0023] When the amount of acrylic emulsion filled into the feed pipe 11 is too large, the acrylic emulsion has a certain liquid level between the material tray 21 and the grid ring plate 3. The grid baffle 31 covers the material tray 21 to prevent the excessive acrylic emulsion from being directly thrown over the grid ring plate 3 onto the inner wall of the material cylinder, thereby improving the stability of the defoaming operation when there is excess acrylic emulsion and improving the defoaming effect of the acrylic emulsion.

[0024] Furthermore, a drive motor 9 for driving the rotating rod 2 to rotate is provided on the tank body 1. The drive motor 9 and its driver program are common technical knowledge to those skilled in the art and will not be described in detail here.

[0025] In the above technical solution, the grid baffle 31 is used to cover the material tray 21 to prevent excessive acrylic emulsion from being thrown directly over the grid ring plate 3 onto the inner wall of the material cylinder, thereby improving the stability of the excessive acrylic emulsion in the defoaming operation and improving the defoaming effect of the acrylic emulsion.

[0026] In another embodiment of the present invention, the top surface of the material tray 21 is an inclined support surface 211 in the shape of a cone, and the inner side of the inclined support surface 211 is the low side.

[0027] Preferred, such as Figure 2 As shown, the top surface of the material tray 21 is an inclined support surface 211, and the inner side of the inclined support surface 211 is the low side, which causes the acrylic emulsion to accumulate on the inclined support surface 211. Then, when the acrylic emulsion is thrown outward by the centrifugal force of the rotating rod 2, the acrylic emulsion needs to overcome its own gravity and flow along the inclined support surface 211 to the high end, thereby increasing the flow stroke of the acrylic emulsion when it is thrown out, and thus further improving the defoaming effect of the acrylic emulsion.

[0028] In another embodiment of the present invention, the mesh ring plate 3 is axially slidably disposed on the rotating rod 2, so that the mesh baffle 31 moves relative to the inclined support surface 211.

[0029] Preferred, such as Figure 2 As shown, the mesh ring plate 3 is axially slidably arranged on the rotating rod 2, which allows the mesh baffle 31 to move closer to or further away from the inclined support surface 211. This is used to adjust the volume of the material holding space between the mesh baffle 31, the mesh ring plate 3, and the inclined support surface 211. When excessive acrylic emulsion is filled into the tank 1 through the feed pipe 11, the mesh ring plate 3 can slide away from the support plate 21, thereby increasing the volume of the material holding space between the mesh baffle 31, the mesh ring plate 3, and the inclined support surface 211. This allows the material holding space to simultaneously hold more acrylic emulsion, thus preventing excessive acrylic emulsion from overflowing directly to the bottom of the tank 1 and causing a decrease in the defoaming effect.

[0030] Secondly, when the container space contains acrylic emulsion at a certain liquid level, the vertically lower side of the container space is close to the inclined support surface 211. The inclined support surface 211 is then used to reduce the ejection speed of the acrylic emulsion on the lower side of the container space, thereby achieving a balance between the ejection speed of the acrylic emulsion on the upper and lower sides of the container space.

[0031] Furthermore, a drive cylinder 5 is provided inside the rotating rod 2 to drive the mesh ring plate 3 to slide. The drive cylinder 5 is common knowledge to those skilled in the art and will not be described in detail here.

[0032] In another embodiment of the present invention, a flexible pad ring 4 is fixedly connected to the inner end of the material tray 21. The flexible pad ring 4 is located on the outer ring side of the inclined support surface 211, so that the outer ring side of the flexible pad ring 4 abuts against the mesh ring plate 3.

[0033] Preferred, such as Figure 4 As shown, the flexible pad ring 4 is ring-shaped, and the inner ring side of the flexible pad ring 4 is fixedly connected to the material tray 21, so that the outer ring side of the flexible pad ring 4 can move and abut against the inner wall of the mesh ring plate 3, thereby preventing the acrylic emulsion in the material holding space between the mesh baffle 31, the mesh ring plate 3 and the inclined support surface 211 from leaking downward from the gap between the mesh ring plate 3 and the material tray 21, and further improving the defoaming effect of the acrylic emulsion.

[0034] When the grid ring plate 3 moves relative to the material tray 21, the flexible pad ring 4 deforms so that the outer ring side of the flexible pad ring 4 always abuts against the inner ring side of the grid ring plate 3. When the acrylic emulsion in the material space is thrown out by centrifugal force, the acrylic emulsion will also exert deformation pressure on the flexible pad ring 4 to drive the outer ring end of the flexible pad ring 4 to stably abut against the inner ring side of the grid ring plate 3.

[0035] In another embodiment of the present invention, when the mesh ring plate 3 slides to the point where the mesh baffle 31 abuts against the inclined support surface 211, the outer ring side of the flexible pad ring 4 abuts against the connection between the mesh ring plate 3 and the mesh baffle 31.

[0036] Preferred, such as Figure 4As shown, the flexible gasket 4 is set on the high side of the inclined support surface 211. When the amount of acrylic emulsion filled into the tank 1 by the feed pipe 11 is small, the grid ring plate 3 can slide close to the support plate 21, and the grid baffle 31 can abut against the high end of the inclined support surface 211. At this time, the grid baffle 31 and the support plate 21 are clamped on the vertical sides of the flexible gasket 4. The flexible gasket 4 separates the grid ring plate 3 from the inclined support surface 211, and the acrylic emulsion with a small amount of liquid is supported on the inclined support surface 211. If the rotating rod 2 rotates axially at this time, the acrylic emulsion can only be driven by centrifugal force to pass through the grid baffle 31 horizontally again and then flow through the grid ring plate 3 before being thrown out, thereby improving the defoaming effect of a small amount of acrylic emulsion.

[0037] In another embodiment of the present invention, a sliding part 32 is fixedly provided on the mesh baffle 31, and a sliding groove 22 is provided on the rotating rod 2 to slide in cooperation with the sliding part 32.

[0038] Preferred, such as Figure 3 As shown, a sliding part 32 is provided on the grid baffle 31. The sliding part 32 is integrally formed with the grid baffle 31, and the sliding part 32 is slidably disposed in the sliding groove 22 opened on the rotating rod 2 to improve the axial sliding stability of the grid ring plate 3 on the rotating rod 2.

[0039] In another embodiment of this utility model, the rotating rod 2 is made of stainless steel.

[0040] Preferably, the rotating rod 2 is made of stainless steel to improve its corrosion resistance and compressive strength, thereby increasing the service life of the rotating rod 2.

[0041] In another embodiment of this utility model, the mesh ring plate 3 is made of stainless steel.

[0042] Preferably, the mesh ring plate 3 is made of stainless steel to improve its corrosion resistance and compressive strength, thereby increasing the service life of the mesh ring plate 3.

[0043] In another embodiment of this utility model, the flexible gasket 4 is made of fluororubber.

[0044] Preferably, the flexible gasket 4 is made of fluororubber to improve the corrosion resistance of the flexible gasket 4 and increase its service life.

[0045] In another embodiment of this utility model, the surface of the rotating rod 2 is provided with a corrosion-resistant coating.

[0046] Working principle: When the feed pipe 11 fills the tank 1 with acrylic emulsion, the acrylic emulsion flows downward from above the grid baffle 31 and is received by the support plate 21 after passing through the grid baffle 31. During the process of the acrylic emulsion flowing through the grid baffle 31, the grid baffle 31 can break the air bubbles carried in the acrylic emulsion to initially remove the bubbles. Then the acrylic emulsion is spread out on the support plate 21 to remove the air bubbles in the acrylic emulsion again. Then, under the action of the centrifugal force of the rotating rod 2, the acrylic emulsion passes through the grid ring plate 3 along the surface of the support plate 21 and is thrown onto the inner wall of the tank 1, thereby completing the defoaming operation of the acrylic emulsion. When excessive acrylic emulsion is filled into the tank 1 through the feed pipe 11, the grid ring plate 3 can slide away from the material tray 21, thereby increasing the volume of the material space between the grid baffle 31, the grid ring plate 3 and the inclined support surface 211, so that the material space can accommodate more acrylic emulsion at the same time. When the amount of acrylic emulsion injected into the tank 1 by the feed pipe 11 is small, the grid ring plate 3 can slide close to the material tray 21, and the grid baffle 31 can abut against the high end of the inclined support surface 211. At this time, the grid baffle 31 and the material tray 21 are clamped on the vertical sides of the flexible pad ring 4. The flexible pad ring 4 separates the grid ring plate 3 from the inclined support surface 211, and the acrylic emulsion with a small amount of liquid is supported on the inclined support surface 211. If the rotating rod 2 rotates axially at this time, the acrylic emulsion can only be driven by centrifugal force to pass through the grid baffle 31 horizontally again and then flow through the grid ring plate 3 before being thrown out.

[0047] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A vacuum degassing device for acrylic emulsion production, characterized in that, The device includes a tank body (1), inside which a rotating rod (2) is rotatably mounted with a material tray (21) fixedly mounted on it. The tank body (1) is fixedly mounted with a feed pipe (11). A mesh ring plate (3) is coaxially mounted on the rotating rod (2) and covers the periphery of the material tray (21). A mesh baffle (31) is fixedly mounted on the mesh ring plate (3) and covers the vertically above the material tray (21). The mesh baffle (31) is located between the feed pipe (11) and the material tray (21).

2. The vacuum degassing device for acrylic emulsion production according to claim 1, characterized in that, The top surface of the material tray (21) is an inclined tray (211) in the shape of a cone, and the inner side of the inclined tray (211) is the low side.

3. The vacuum degassing device for acrylic emulsion production according to claim 2, characterized in that, The mesh ring plate (3) is axially slidably mounted on the rotating rod (2) so that the mesh baffle (31) moves relative to the inclined support surface (211).

4. The vacuum degassing device for acrylic emulsion production according to claim 3, characterized in that, It also includes a flexible pad ring (4) fixedly connected to the inner end of the material tray (21), the flexible pad ring (4) being located on the outer ring side of the inclined support surface (211) so that the outer ring side of the flexible pad ring (4) abuts against the mesh ring plate (3).

5. The vacuum degassing device for acrylic emulsion production according to claim 4, characterized in that, When the mesh ring plate (3) slides to the point where the mesh baffle (31) abuts against the inclined support surface (211), the outer ring side of the flexible pad ring (4) abuts against the connection between the mesh ring plate (3) and the mesh baffle (31).

6. The vacuum degassing device for acrylic emulsion production according to claim 3, characterized in that, A sliding part (32) is fixedly provided on the mesh baffle (31), and a sliding groove (22) is provided on the rotating rod (2) to slide in cooperation with the sliding part (32).

7. The vacuum degassing device for acrylic emulsion production according to claim 1, characterized in that, The rotating rod (2) is made of stainless steel.

8. The vacuum degassing device for acrylic emulsion production according to claim 1, characterized in that, The mesh ring plate (3) is made of stainless steel.

9. A vacuum degassing device for acrylic emulsion production according to claim 4, characterized in that, The flexible gasket (4) is made of fluororubber.

10. The vacuum defoaming device for producing an acrylic emulsion according to claim 6, characterized in that, The rotating rod (2) has a corrosion-resistant coating on its surface.

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