Reaction device for synthesizing latex microspheres

Abstract

The utility model discloses a reaction device for synthesizing latex microspheres, which relates to the field of emulsifying and stirring for synthesizing latex microspheres and comprises a stirring tank, a support is fixedly mounted at the top end of the inner wall of the stirring tank, an upper connecting plate is welded at one end, close to the circle center of the stirring tank, of the support, and a rotating motor is mounted at the top end of the upper connecting plate. A lower connecting plate is fixedly installed at the bottom end of the upper connecting plate through a fixing rod, the output end of the rotating motor is connected with a rotating shaft which penetrates through the upper connecting plate and the lower connecting plate and extends to the position below the lower connecting plate, and an upper liquid suction wheel is installed at the position, located below the lower connecting plate, of the periphery of the rotating shaft; and a lower liquid suction wheel is mounted on the periphery of the rotating shaft and positioned below the upper liquid suction wheel. Through the arrangement of the upper shearing assembly and the lower shearing assembly, raw material liquid can be respectively emulsified by three times of shearing stress and two times of shearing stress, so that the emulsifying and stirring efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of emulsion stirring for latex microsphere synthesis, and particularly relates to a reaction device for latex microsphere synthesis. BACKGROUND

[0002] There are various methods for synthesizing latex microspheres, and the following introduces the synthesis reaction process of the latex microspheres by taking the common emulsion polymerization method as an example: raw material preparation, monomer: commonly used are styrene, acrylate, etc., which are main components for forming the latex microspheres; emulsifier: such as sodium dodecyl sulfate, etc., which can reduce the surface tension to form a stable emulsion of the monomer in water; initiator: for example, potassium persulfate, which decomposes to generate free radicals under certain conditions to initiate polymerization of the monomer; other additives: crosslinking agent, buffer, etc. can be added as needed to adjust the performance of the latex microspheres; the monomer, emulsifier, and water are added to a container to perform pre-emulsification by stirring to form a stable emulsion. In this process, a layer of protective film is formed on the surface of the monomer droplets by the emulsifier molecules to prevent the monomer droplets from aggregating; and then the polymerization reaction is performed to prepare the latex microspheres.

[0003] In the prior art, the homogenizing stirrer for emulsification can only perform single shear stress emulsification on the liquid sucked in, and thus the emulsification efficiency can be further improved in the production process. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the problems in the background art, and provides a reaction device for latex microsphere synthesis.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a reaction device for latex microsphere synthesis, comprising a stirring tank, a support is fixedly installed at the top end of the inner wall of the stirring tank, an upper connecting plate is welded at one end of the support close to the center of the stirring tank, a rotary motor is installed at the top end of the upper connecting plate, a lower connecting plate is fixedly installed at the bottom end of the upper connecting plate through a fixing rod, a rotary shaft extending through the upper connecting plate and the lower connecting plate and extending below the lower connecting plate is connected to the output end of the rotary motor, an upper liquid suction wheel is installed below the lower connecting plate at the outer periphery of the rotary shaft, a lower liquid suction wheel is installed below the upper liquid suction wheel at the outer periphery of the rotary shaft, and an emulsification mechanism is distributed in the interior and at the bottom end of the lower connecting plate and at the outer periphery and below the rotary shaft, wherein the emulsification mechanism comprises an upper shearing assembly and a lower shearing assembly.

[0006] As a further scheme of the utility model: the upper shearing assembly comprises an upper shearing hole opened in the interior of the lower connecting plate and an upper rotating plate fixedly installed at the outer periphery of the rotary shaft, a lower shearing hole is opened in the interior of the upper rotating plate, and the upper rotating plate is located between the upper liquid suction wheel and the lower connecting plate.

[0007] As a further scheme of the utility model: the lower shearing assembly includes rotation module and fixed module, the rotation module includes the bottom end plate fixedly installed at the bottom end of the rotating shaft, the inside of the bottom end plate is provided with a liquid inlet, the top of the bottom end plate is integrally formed with an outer rotating ring and an inner rotating ring, the outer rotating ring is located at the inner periphery of the inner rotating ring, and the inner periphery of the outer rotating ring and the outer periphery of the inner rotating ring have a clamping cavity, the inside of the outer rotating ring is provided with an outer shearing hole, and the inside of the inner rotating ring is provided with an inner shearing hole.

[0008] As a further scheme of the utility model: the fixed module includes a fixed ring located in the clamping cavity, the top of the fixed ring is fixedly connected with the bottom end of the lower connecting plate, and the inside of the fixed ring is provided with a fixed shearing hole.

[0009] As a further scheme of the utility model: the inner periphery of the inner rotating ring is fixedly installed with a transversely arranged baffle.

[0010] Compared with the prior art, the utility model has the beneficial effects that:

[0011] 1. By setting the upper shearing assembly and the lower shearing assembly, the raw material liquid can be subjected to three times of shearing stress and twice of shearing stress for emulsification, thereby improving the efficiency of emulsification and stirring. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a structural schematic view of the utility model;

[0013] Figure 2 It is a bottom end plate schematic view of the utility model;

[0014] Figure 3 It is an internal structure schematic view of the utility model;

[0015] Figure 4 It is a fixed ring schematic view of the utility model; Figure 3 It is a local enlarged view of A in the middle.

[0016] In the drawing: 1, stirring tank; 2, support; 3, upper connecting plate; 4, rotating motor; 5, fixed rod; 6, lower connecting plate; 7, rotating shaft; 8, upper shearing hole; 9, baffle; 10, upper liquid suction wheel; 11, lower liquid suction wheel; 12, bottom end plate; 13, liquid inlet; 14, outer rotating ring; 15, outer shearing hole; 16, inner rotating ring; 17, inner shearing hole; 18, upper rotating plate; 19, lower shearing hole; 20, fixed ring; 21, fixed shearing hole. DETAILED DESCRIPTION

[0017] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0018] Please refer to Figures 1-4 In the embodiments of the present application, the reaction device for synthesizing latex microspheres comprises a stirring tank 1, a support 2 is fixedly installed at the top end of the inner wall of the stirring tank 1, an upper connecting plate 3 is welded at one end of the support 2 close to the center of the stirring tank 1, a rotary motor 4 is installed at the top end of the upper connecting plate 3, a lower connecting plate 6 is fixedly installed at the bottom end of the upper connecting plate 3 through a fixed rod 5, a rotating shaft 7 extending through the upper connecting plate 3 and the lower connecting plate 6 and extending below the lower connecting plate 6 is connected to the output end of the rotary motor 4, an upper liquid suction wheel 10 is installed below the lower connecting plate 6 at the outer periphery of the rotating shaft 7, a lower liquid suction wheel 11 is installed below the upper liquid suction wheel 10 at the outer periphery of the rotating shaft 7, and an emulsification mechanism is distributed in the interior and at the bottom end of the lower connecting plate 6 and at the outer periphery and below the rotating shaft 7, the emulsification mechanism comprising an upper shearing assembly and a lower shearing assembly.

[0019] In the embodiments of the present application: first, the raw materials, emulsifiers, initiators and other additives for preparing latex microspheres are added to the stirring tank 1, then the rotary motor 4 is started, the rotary motor 4 drives the rotating shaft 7 at its output end to rotate, the rotating shaft 7 drives the upper liquid suction wheel 10 and the lower liquid suction wheel 11 to rotate simultaneously, and drives the rotating module in the lower shearing assembly to rotate, and in the process, the two parts of the upper shearing assembly rotate relative to each other.

[0020] In the above process, when the upper liquid suction wheel 10 and the lower liquid suction wheel 11 rotate, the raw material liquid is sucked in respectively, the raw material liquid sucked in by the lower liquid suction wheel 11 is sheared and emulsified twice by the rotating module and the fixed module, and the raw material liquid sucked in by the upper liquid suction wheel 10 is sheared and emulsified three times by the upper shearing assembly and the lower shearing assembly, and by increasing the number of shearing stress of the raw material liquid, the emulsification speed of the raw material liquid is improved.

[0021] It should be noted that the lower liquid suction wheel 11 and the upper liquid suction wheel 10 are designed symmetrically, so as to meet the liquid suction effect of the two liquid suction wheels in the rotating process.

[0022] Please refer to Figure 3 and Figure 4 The upper shearing assembly comprises an upper shearing hole 8 opened in the interior of the lower connecting plate 6 and an upper rotating plate 18 fixedly installed at the outer periphery of the rotating shaft 7, a lower shearing hole 19 is opened in the interior of the upper rotating plate 18, and the upper rotating plate 18 is located between the upper liquid suction wheel 10 and the lower connecting plate 6.

[0023] In this embodiment: During the rotation of the upper suction wheel 10, the upper suction wheel 10 generates suction force, which draws the raw material liquid above the inner wall of the mixing tank 1 into the emulsification mechanism. During the entry process, it enters the gap between the lower connecting plate 6 and the upper rotating plate 18 through the upper shear hole 8, and enters the interior of the inner rotating ring 16 through the lower shear hole 19 under the shear stress of the upper rotating plate 18, thereby realizing a shear stress on the raw material liquid during the entry process.

[0024] Please refer to this carefully. Figure 2 , Figure 3 and Figure 4 The lower shearing assembly includes a rotating module and a fixing module. The rotating module includes a bottom end plate 12 fixedly installed at the bottom end of the rotating shaft 7. The bottom end plate 12 has an inlet 13 inside. The top of the bottom end plate 12 is integrally formed with an outer rotating ring 14 and an inner rotating ring 16. The outer rotating ring 14 is located on the inner circumference of the inner rotating ring 16, and there is a clamping cavity between the inner circumference of the outer rotating ring 14 and the outer circumference of the inner rotating ring 16. The outer rotating ring 14 has an outer shearing hole 15 inside, and the inner rotating ring 16 has an inner shearing hole 17 inside. The fixing module includes a fixing ring 20 located inside the clamping cavity. The top of the fixing ring 20 is fixedly connected to the bottom end of the lower connecting plate 6. The fixing ring 20 has a fixing shearing hole 21 inside.

[0025] In this embodiment: when the lower suction wheel 11 rotates, it draws in the raw material liquid inside the mixing tank 1. The raw material liquid enters the inner rotating ring 16 through the liquid inlet 13. The raw material liquid entering the inner rotating ring 16 from above or below enters the gap between the inner rotating ring 16 and the fixed ring 20 through the inner shear hole 17 under the pushing force. Under the shear stress, it enters the gap between the fixed ring 20 and the outer rotating ring 14 through the fixed shear hole 21. Under the shear stress again, it overflows outward through the outer shear hole 15. This realizes the two-stage shear emulsification of the liquid by the rotating module and the fixed module, thereby improving the emulsification efficiency.

[0026] Please refer to this carefully. Figure 4 A horizontally arranged partition 9 is fixedly installed in the middle of the inner circumference of the inner rotating ring 16.

[0027] In this embodiment, the design of the partition 9 can achieve a separation effect and avoid the problem of mutual cancellation between the two liquid suction wheels during high-speed rotation.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A reaction apparatus for synthesizing emulsion microspheres, comprising a stirring tank (1), characterized in that, The inner wall top of the stirring tank (1) is fixedly provided with a support (2), one end of the support (2) close to the center of the stirring tank (1) is welded with an upper connecting plate (3), the top of the upper connecting plate (3) is provided with a rotating motor (4), the bottom of the upper connecting plate (3) is fixedly provided with a lower connecting plate (6) through a fixed rod (5), the output end of the rotating motor (4) is connected with a rotating shaft (7) penetrating through the upper connecting plate (3) and the lower connecting plate (6) and extending below the lower connecting plate (6), the outer periphery of the rotating shaft (7) below the lower connecting plate (6) is provided with an upper liquid suction wheel (10), the outer periphery of the rotating shaft (7) below the upper liquid suction wheel (10) is provided with a lower liquid suction wheel (11), the inside and bottom of the lower connecting plate (6) and the outer periphery and below of the rotating shaft (7) are provided with an emulsification mechanism, and the emulsification mechanism comprises an upper shearing assembly and a lower shearing assembly.

2. The reaction apparatus for synthesizing latex microspheres according to claim 1, wherein The upper shearing assembly comprises an upper shearing hole (8) formed in the inside of the lower connecting plate (6) and an upper rotating plate (18) fixedly provided on the outer periphery of the rotating shaft (7), the inside of the upper rotating plate (18) is formed with a lower shearing hole (19), and the upper rotating plate (18) is located between the upper liquid suction wheel (10) and the lower connecting plate (6).

3. The reaction apparatus for synthesizing latex microspheres according to claim 2, wherein The lower shearing assembly comprises a rotating module and a fixed module, the rotating module comprises a bottom end plate (12) fixedly provided on the bottom end of the rotating shaft (7), the inside of the bottom end plate (12) is formed with a liquid inlet (13), the top of the bottom end plate (12) is integrally formed with an outer rotating ring (14) and an inner rotating ring (16), the outer rotating ring (14) is located at the inner periphery of the inner rotating ring (16), and the inner periphery of the outer rotating ring (14) and the outer periphery of the inner rotating ring (16) have a clamping cavity, the inside of the outer rotating ring (14) is formed with an outer shearing hole (15), and the inside of the inner rotating ring (16) is formed with an inner shearing hole (17).

4. The reaction apparatus for synthesizing latex microspheres according to claim 3, wherein The fixed module comprises a fixed ring (20) located in the clamping cavity, the top of the fixed ring (20) is fixedly connected with the bottom end of the lower connecting plate (6), and the inside of the fixed ring (20) is formed with a fixed shearing hole (21).

5. The reaction apparatus for synthesizing latex microspheres according to claim 4, wherein The inner periphery of the inner rotating ring (16) is fixedly provided with a transversely arranged partition plate (9).

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