A waterborne acrylic emulsion defoamer dosing mixer

Abstract

The application relates to the field of defoaming agent mixing, in particular to a water-based acrylic emulsion defoaming agent filling mixer, which comprises a mixing mechanism, the mixing mechanism comprises a first mixing bin, a second mixing bin is arranged below the first mixing bin, an inner cavity of the first mixing bin is provided with a deceleration mixing assembly used for decelerating the emulsion, an intermittent filling assembly used for filling the defoaming agent is arranged on one side above the first mixing bin, and a centrifugal adjusting assembly used for adjusting according to the emulsion flow is arranged below the intermittent filling assembly. The water-based acrylic emulsion flowing at high speed can be decelerated and disturbed by the deceleration mixing assembly in the first mixing bin, the emulsion high-speed flow inertia is weakened, the material mixing residence time is prolonged, the problems that the defoaming agent is rapidly lost with the liquid flow and the preliminary mixing is insufficient due to the too fast emulsion flow speed are effectively solved, and the preliminary fusion effect of the emulsion and the defoaming agent is ensured.

Description

Technical Field

[0001] This invention relates to the field of defoamer mixing, and more specifically, to a dispensing mixer for an aqueous acrylic emulsion defoamer. Background Technology

[0002] In the production of water-based acrylic emulsions, the emulsification, conveying, and stirring of the system continuously generate a large number of microbubbles. Residual bubbles can cause quality defects such as pinholes, craters, and uneven gloss in the coating. The industry commonly uses online defoamer dosing and mixing equipment to treat the emulsion. However, existing dosing and mixing devices have several shortcomings in actual production line applications: Firstly, the emulsion in the production line's conveying pipeline has a high flow rate and large fluid inertia. Conventional mixing chambers lack deceleration and buffer structures, causing the defoamer to continuously and rapidly rush out of the chamber with the high-speed liquid flow. The contact and mixing time between the agent and the emulsion is extremely short, resulting in poor initial fusion and making it easy for problems such as localized defoamer deficiency and incomplete removal of bubbles in the finished product to occur. If the pipeline flow rate is reduced, the production capacity will be significantly reduced, making it difficult to adapt to the needs of continuous mass production. Secondly, most commercially available equipment uses a continuously dispensed, normally open defoamer, which cannot adjust the dosage based on the real-time emulsion flow rate. When the production line load fluctuates, continuous dispensing under low flow conditions can easily cause localized accumulation of defoamer and excessive concentration, increasing raw material losses and production costs. Excessive defoamer can also damage the emulsion's emulsification stability, leading to stratification and loss of gloss. Under high flow conditions, insufficient dosage results in defoaming effects that do not meet process standards, leading to significant fluctuations in product quality. Furthermore, traditional dispensing structures require external motors, flow sensors, and electronic control systems to adjust the dispensing volume, resulting in complex equipment structures and high maintenance costs. To address these issues, a dispensing mixer for water-based acrylic emulsion defoamer is proposed. Summary of the Invention

[0003] Technical problems to be solved

[0004] To address the problems existing in the prior art, the present invention provides a dosing mixer for an aqueous acrylic emulsion defoamer, thereby solving the problems mentioned in the background art.

[0005] Technical solution

[0006] To achieve the above objectives, the present invention provides the following technical solution: a mixing device for adding an aqueous acrylic emulsion defoamer, comprising a mixing mechanism, which includes a first mixing chamber, a second mixing chamber disposed below the first mixing chamber, a deceleration mixing component for decelerating the emulsion disposed in the inner cavity of the first mixing chamber, an intermittent adding component disposed on one side above the first mixing chamber for adding the defoamer, and a centrifugal adjusting component disposed below the intermittent adding component for adjusting the emulsion flow rate, and a mixing auxiliary mechanism disposed in the inner cavity of the second mixing chamber, the mixing auxiliary mechanism including a stirring component disposed below the inner cavity of the second mixing chamber for re-stirring the mixed emulsion and defoamer, and a defoaming component disposed above the inner cavity of the second mixing chamber for defoaming the inner wall edge.

[0007] The present invention is further configured such that the deceleration mixing assembly includes a deceleration drive impeller disposed above the inner cavity of the first mixing chamber, an inlet pipe is connected to the upper middle part of the first mixing chamber, a plurality of outlets are opened at the lower end of the inner cavity of the first mixing chamber, the outlets are disposed below the deceleration drive impeller, the lower end of the first mixing chamber is connected to the upper end of the second mixing chamber, the lower end of the second mixing chamber is connected to an outlet pipe, and a first rotating rod is fixedly installed on both sides of the middle part of the deceleration drive impeller, the first rotating rod is rotatably connected to the first mixing chamber through a sealed bearing.

[0008] The present invention is further configured such that the intermittent filling component includes a first bevel gear mounted on a first rotating rod, a second rotating rod disposed above the first bevel gear, a second bevel gear fixedly mounted at the lower end of the second rotating rod, a first disc fixedly mounted at the upper end of the second rotating rod, a second disc disposed above the first disc, a second protrusion disposed above the first disc, a first protrusion disposed below the second disc, and a fixing frame fixedly mounted at the upper end of the second disc.

[0009] The invention is further configured such that: a defoamer injection pipe is provided on one side above the first mixing chamber; the outlet end of the defoamer injection pipe is connected to multiple diversion pipes; the end of each diversion pipe is connected to the inlet end of the first mixing chamber; a fixing block is fixedly connected to the outside of the defoamer injection pipe; a strip-shaped groove is formed through the inside of the fixing block; two sides of the fixing frame are respectively movably inserted into the inside of two strip-shaped grooves; a shell is provided above the fixing block; a cavity is provided in the middle of the inner cavity of the shell; a piston plate is provided inside the cavity; the upper end of the piston plate is fixedly connected to the middle of the upper end of the fixing frame; a sealing block is fixedly installed in the middle of the inner cavity of the defoamer injection pipe; the sealing block is located directly below the shell; sealing airbags are adhered to both sides of the sealing block; a hose is connected to the outlet end of the cavity; and the other end of the hose is connected to the inlet end of the sealing airbag.

[0010] The invention is further configured such that a support frame is provided on the outer side of the upper end of the second rotating rod, and the end of the support frame near the second rotating rod is rotatably connected to the second rotating rod through a bearing seat, the first bevel gear meshes with the second bevel gear, and the size of the first disk is larger than the size of the second disk.

[0011] The invention is further configured such that a second sliding groove is provided on the inner wall of the strip groove, a second slider is fixedly installed on the side of the fixing frame near the second sliding groove, the size of the second slider is adapted to the size of the second sliding groove, and the second slider is slidably connected to the second sliding groove, a second spring is fixedly installed in the inner cavity of the second sliding groove, the other end of the second spring is fixedly connected to the lower end of the second slider, and a counterweight is provided in the middle of the inner cavity of the second disc.

[0012] The present invention is further configured such that the centrifugal adjustment assembly includes a first groove formed on a first disc, a first slider is fixedly installed on the side of the second protrusion near the first groove, the first slider is disposed in the lower middle part of the second protrusion, a first spring is fixedly installed in the inner cavity of the first groove, and the other end of the first spring is fixedly connected to the first slider.

[0013] The present invention is further configured such that the stirring assembly includes a stirring motor installed on the side of the second mixing chamber away from the defoamer injection pipe, a stirring rod is fixedly installed on the drive end of the stirring motor, and multiple sets of stirring blades are detachably installed on the outside of the stirring rod, and the stirring rod is located below the liquid outlet.

[0014] The present invention is further configured such that the defoaming component includes a buoyancy frame disposed above the inner cavity of the second mixing chamber, two buoyancy frames are provided, and the buoyancy frames are in contact with the inner wall of the second mixing chamber. The upper and lower end faces of the buoyancy frames are provided with continuous bubble-breaking protrusions along the circumference of the frame body. The cross-section of the bubble-breaking protrusions is wedge-shaped. A fixing rod is fixedly installed on the inner side of the buoyancy frame. A fixing plate is welded to the upper end of the fixing rod. A cam is fixedly installed in the middle of the first rotating rod.

[0015] The invention is further configured such that the cam is positioned directly above the fixed rod, and a third spring is sleeved on the outer side of the lower end of the fixed rod, with the lower end of the third spring connected to the upper end of the second mixing chamber.

[0016] Beneficial effects

[0017] Compared with the prior art, the present invention provides a dosing mixer for an aqueous acrylic emulsion defoamer, which has the following beneficial effects: This invention can slow down and turbulent the high-speed inflow of water-based acrylic emulsion through the deceleration mixing component inside the first mixing chamber, weaken the high-speed flow inertia of the emulsion, prolong the material mixing residence time, effectively solve the problem of defoamer being quickly lost with the liquid flow due to excessive emulsion flow rate and insufficient initial mixing, and ensure the initial fusion effect of emulsion and defoamer; Furthermore, the impeller can be rotated by the impact of the emulsion fluid, which converts the fluid kinetic energy into mechanical power, providing linkage power for subsequent intermittent injection, centrifugal flow regulation, and cam-driven active defoaming. The work done by each component will further enhance the deceleration effect on the emulsion. The intermittent injection component linked by the impeller can realize the periodic non-continuous injection of defoamer, eliminating the problems of local agent accumulation, excessive concentration, and raw material waste caused by traditional continuous injection methods. At the same time, in conjunction with the centrifugal regulation component, the injection stroke and injection amount can be adaptively adjusted according to the real-time flow of the emulsion to achieve the effect of large injection for large flow and small injection for small flow, thereby adapting to the flow fluctuation of the production line. The initial mixture can be further agitated and mixed by the stirring components inside the second mixing chamber. At the same time, the liquid surface fluctuation drives the buoyancy frame to passively break bubbles, and the impeller linkage cam drives the buoyancy frame to actively break bubbles by micro-movement. This removes the tiny bubbles that accumulate on the edge of the chamber wall, thereby achieving continuous and high-quality mixing and defoaming production, significantly reducing the bubble defects in the finished emulsion, and steadily improving the overall quality of the product. Attached Figure Description

[0018] Figure 1 A first-view structural diagram of the overall structure of the mixing device for adding water-based acrylic emulsion defoamer.

[0019] Figure 2 A schematic diagram of the overall second-view structure of the mixing device for water-based acrylic emulsion defoamer.

[0020] Figure 3 This is a schematic diagram of the internal structure of the first and second mixing chambers of the mixer for adding water-based acrylic emulsion defoamer.

[0021] Figure 4 This is a schematic diagram of the mixing mechanism and mixing auxiliary mechanism of the mixer for adding water-based acrylic emulsion defoamer.

[0022] Figure 5 A schematic diagram of the mixing auxiliary mechanism of the mixer for adding water-based acrylic emulsion defoamer.

[0023] Figure 6 A schematic diagram of the mixing mechanism of a mixer for adding water-based acrylic emulsion defoamer.

[0024] Figure 7Exploded view of the first and second disks of the mixing device for adding water-based acrylic emulsion defoamer.

[0025] Figure 8 Exploded view from a second perspective of the first and second disks of the mixing device for adding water-based acrylic emulsion defoamer.

[0026] Figure 9 Diagram showing the rising state of the second disc of the low-flow emulsion in the mixer for adding defoamer to water-based acrylic emulsions.

[0027] Figure 10 Diagram showing the lifting state of the second disc of the high-flow-rate emulsion in the mixer for adding water-based acrylic emulsion defoamer.

[0028] Figure 11 A schematic diagram of the intermittent dispensing assembly of a dispensing mixer for water-based acrylic emulsion defoamer.

[0029] Figure 12 A schematic diagram of the internal structure of the intermittent dispensing component of the dispensing mixer for water-based acrylic emulsion defoamer.

[0030] In the diagram: 100, mixing mechanism; 101, first mixing chamber; 102, inlet pipe; 103, second mixing chamber; 104, outlet pipe; 105, reduction drive impeller; 106, first rotating rod; 107, defoamer injection pipe; 108, diverter pipe; 109, outlet; 110, first bevel gear; 111, second rotating rod; 112, support frame; 113, second bevel gear; 114, first disc; 115, second disc; 116, first protrusion; 117, second protrusion; 118, first slider; 119, first spring; 120, the... 121. Slide groove; 122. Fixing frame; 123. Housing; 124. Cavity; 125. Piston plate; 126. Fixing block; 127. Strip groove; 128. Second slide groove; 129. Second slider; 130. Second spring; 131. Sealing block; 132. Sealing airbag; 133. Hose; 134. Counterweight; 200. Mixing auxiliary mechanism; 201. Stirring motor; 202. Stirring rod; 203. Stirring blade; 204. Buoyancy frame; 205. Bubble-breaking protrusion; 206. Fixing rod; 207. Fixing plate; 208. Cam; 209. Third spring. Detailed Implementation

[0031] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0032] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0033] In this invention, unless otherwise stated, the directional terms such as "up" and "down" generally refer to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0034] For examples, please refer to Figure 1 - Figure 12 A water-based acrylic emulsion defoamer dispensing mixer includes a mixing mechanism 100, which includes a first mixing chamber 101. A second mixing chamber 103 is disposed below the first mixing chamber 101. The inner cavity of the first mixing chamber 101 is provided with a deceleration mixing component for decelerating the emulsion, an intermittent dispensing component disposed on one side above the first mixing chamber 101 for dispensing the defoamer, and a centrifugal adjustment component disposed below the intermittent dispensing component for adjusting the emulsion flow rate. The inner cavity of the second mixing chamber 103 is provided with a mixing auxiliary mechanism 200, which includes a stirring component disposed below the inner cavity of the second mixing chamber 103 for re-stirring the mixed emulsion and defoamer, and a defoaming component disposed above the inner cavity of the second mixing chamber 103 for defoaming the inner wall edge.

[0035] This application is approved. During operation, the high-speed flowing aqueous acrylic emulsion first enters the first mixing chamber 101. The deceleration mixing component obstructs, slows down, and stabilizes the high-speed liquid flow, reducing the emulsion's flow inertia and extending the material's residence time. This allows the subsequently added defoamer to fully contact and blend with the emulsion, preventing the high-speed liquid flow from directly carrying away the defoamer and causing mixing failure. Simultaneously, the high-speed emulsion continuously impacts the deceleration mixing component, driving the deceleration impeller 105 to rotate continuously, converting fluid kinetic energy into mechanical rotational power. This provides all the necessary power for the subsequent intermittent dispensing component, centrifugal flow regulation component, and cam 208 defoaming mechanism. Under this power linkage, the intermittent dispensing component achieves intermittent dispensing of the defoamer. The defoamer is added in a controlled manner to avoid excessively high local concentrations caused by continuous addition. In conjunction with the centrifugal adjustment component, the amount of defoamer added is adjusted according to the real-time flow rate of the emulsion, thereby achieving adaptive flow ratio. The pre-mixed emulsion falls evenly into the second mixing chamber 103 below. The internal stirring component performs secondary deep shearing, stirring, and mixing of the material, further improving the mixing uniformity of the emulsion and defoamer. The liquid surface fluctuations generated during the stirring process will wash and gather the tiny bubbles generated during mixing to the edge of the inner wall of the chamber. At this time, the defoaming component achieves passive bubble breaking of the buoyancy frame 204 by relying on the liquid surface flow, and actively breaks bubbles by the impeller linkage cam 208 through up-and-down micro-movement of the buoyancy frame 204, thus doubly eliminating micro-bubbles in the dead corners of the chamber wall.

[0036] It is worth noting that the liquid inlet pipe 102 is directly connected to the production line pipeline for defoaming treatment, so it is necessary to slow down the high-speed flow of the water-based acrylic emulsion.

[0037] In the example of this application, the deceleration mixing assembly includes a deceleration drive impeller 105 disposed above the inner cavity of the first mixing chamber 101. The upper middle part of the first mixing chamber 101 is connected to a liquid inlet pipe 102. The lower end of the inner cavity of the first mixing chamber 101 is provided with a plurality of liquid outlets 109. The liquid outlets 109 are disposed below the deceleration drive impeller 105. The lower end of the first mixing chamber 101 is connected to the upper end of the second mixing chamber 103. The lower liquid outlet end of the second mixing chamber 103 is connected to a liquid outlet pipe 104. The middle two sides of the deceleration drive impeller 105 are fixedly installed with first rotating rods 106. The first rotating rods 106 are rotatably connected to the first mixing chamber 101 through sealed bearings.

[0038] As a preferred example of the present invention, during the operation of the equipment, the aqueous acrylic emulsion enters the inner cavity of the first mixing chamber 101 at high speed through the upper inlet pipe 102. The high-speed liquid flow directly impacts the deceleration drive impeller 105 arranged in the upper part of the chamber. On the one hand, the impeller blades block, cut, and turbulent the high-speed liquid flow, consuming the kinetic energy of the emulsion flow and achieving a slowdown and stabilization of the emulsion flow, thus thoroughly improving the problem of excessively fast emulsion flow rate and turbulent flow, and providing mixing time for the defoamer to be incorporated into the emulsion. On the other hand, the continuous impact of the emulsion on the blades generates continuous thrust, driving the deceleration drive impeller 105 to rotate continuously, converting the fluid kinetic energy into mechanical rotational power, providing stable power input for all linkage mechanisms of the whole machine. During the rotation of wheel 105, the first rotating rod 106 fixed on both sides of the middle rotates synchronously. The first rotating rod 106 is rotatably connected to the first mixing chamber 101 through a sealed bearing, which ensures smooth rotational transmission without jamming and also ensures the sealing performance of the rotating position, effectively preventing emulsion leakage. After deceleration and stabilization, the emulsion falls through multiple outlets 109 evenly opened at the lower end of the first mixing chamber 101. The multi-point drop makes the material distribution more uniform, avoiding the problem of uneven mixing and material agglomeration caused by concentrated direct rush. Finally, the material enters the second mixing chamber 103 evenly and is stably discharged through the bottom outlet pipe 104, realizing a complete operation process of continuous feeding, stable mixing and continuous discharge.

[0039] In the example of this application, the intermittent filling assembly includes a first bevel gear 110 mounted on a first rotating rod 106, a second rotating rod 111 disposed above the first bevel gear 110, a second bevel gear 113 fixedly mounted at the lower end of the second rotating rod 111, a first disc 114 fixedly mounted at the upper end of the second rotating rod 111, a second disc 115 disposed above the first disc 114, a second protrusion 117 disposed above the first disc 114, a first protrusion 116 disposed below the second disc 115, and a fixing bracket 121 fixedly mounted at the upper end of the second disc 115.

[0040] As a preferred example of the present invention, during the synchronous rotation of the first rotating rod 106 with the speed reduction drive impeller 105, the first bevel gear 110 fixed on the first rotating rod 106 rotates synchronously. Utilizing the bevel gear meshing transmission principle, the horizontal rotational power is converted into vertical rotational power, driving the second bevel gear 113 and the second rotating rod 111 to rotate synchronously and continuously. During the rotation of the second rotating rod 111, the upper first disk 114 is driven to rotate continuously in a circular motion. The second protrusion 117 on the first disk 114 moves in a circular motion with the disk, periodically contacting and disengaging from the first protrusion 116 at the lower end of the second disk 115. This transforms the continuous rotational motion of the first disk 114 into the periodic up-and-down reciprocating linear motion of the second disk 115. The second disk 115 synchronously drives the fixed frame 121 to move up and down as a whole, realizing the stable transmission of power to the subsequent pneumatic opening and closing actuator.

[0041] In the example of this application, a defoamer injection pipe 107 is provided on one side above the first mixing chamber 101. The outlet end of the defoamer injection pipe 107 is connected to a plurality of diversion pipes 108. The ends of the diversion pipes 108 are connected to the inlet end of the first mixing chamber 101. A fixing block 125 is fixedly connected to the outside of the defoamer injection pipe 107. A strip groove 126 is formed through the inside of the fixing block 125. The two sides of the fixing frame 121 are respectively movably inserted into the inside of two strip grooves 126. A housing 12 is provided above the fixing block 125. 2. A cavity 123 is provided in the middle of the inner cavity of the housing 122. A piston plate 124 is provided inside the cavity 123. The upper end of the piston plate 124 is fixedly connected to the upper middle of the fixing frame 121. A sealing block 130 is fixedly installed in the middle of the inner cavity of the defoamer injection pipe 107. The sealing block 130 is located directly below the housing 122. Sealing airbags 131 are bonded to both sides of the sealing block 130. A hose 132 is connected to the air outlet of the cavity 123. The other end of the hose 132 is connected to the air inlet of the sealing airbag 131.

[0042] As a preferred example of the present invention, the defoamer is input through the defoamer injection pipe 107 and dispersed into the first mixing chamber 101 at multiple points through the multi-component flow pipe 108, achieving uniform drug distribution at multiple points and avoiding local accumulation and uneven mixing of defoamer caused by single-point injection. During the reciprocating linear motion of the fixed frame 121 with the second disc 115, the piston plate 124 in the inner cavity of the housing 122 is moved up and down synchronously, periodically changing the air pressure inside the cavity 123. This, together with the hose 132 and the sealing airbag 131, forms a pressure-linked opening and closing circuit. When the fixed frame 121 and the piston plate 124 move upward, the volume of the cavity 123 increases, creating a negative pressure for air extraction. This draws some air from the sealing airbag 131 through the hose 132, causing the sealing airbag 131 to contract and shrink, releasing the pressure and sealing on the inner wall of the defoamer injection pipe 107. There is a gap between the bladder 131 and the inner wall of the defoamer injection tube 107, which facilitates the passage of the defoamer and allows it to flow smoothly into the first mixing chamber 101 for injection. When the fixed frame 121 and piston plate 124 move downward, the volume of cavity 123 decreases and the internal air pressure increases. High-pressure gas is injected into the sealing bladder 131 through the hose 132, causing the sealing bladder 131 to inflate and tightly press against the inner wall of the defoamer injection tube 107, thus sealing and blocking the pipeline and stopping the defoamer injection. The alternating air pressure formed by the reciprocating motion of piston plate 124 enables the periodic opening and closing of the defoamer pipeline, thereby completing the intermittent injection operation. This completely avoids problems such as reagent waste, local concentration exceeding the standard, and unstable product quality caused by traditional continuous injection. Furthermore, intermittent injection can be performed according to the emulsion flow rate, greatly improving the injection and mixing effect of the defoamer.

[0043] In the example of this application, a support frame 112 is provided on the outer side of the upper end of the second rotating rod 111. The end of the support frame 112 near the second rotating rod 111 is rotatably connected to the second rotating rod 111 through a bearing seat. The first bevel gear 110 meshes with the second bevel gear 113. The size of the first disk 114 is larger than the size of the second disk 115. The other end of the support frame 112 is fixed to the outer wall of the first mixing chamber 101. The lower end of the housing 122 is fixedly connected to the upper end of the defoamer injection pipe 107.

[0044] As a preferred example of the present invention, during the operation of the equipment, the support frame 112 and the bearing seat form a stable radial support and limiting constraint on the second rotating rod 111, effectively limiting the radial sway and eccentric offset of the second rotating rod 111 during rotation, greatly improving the rotational coaxiality and running stability of the second rotating rod 111, ensuring that the first bevel gear 110 and the second bevel gear 113 always maintain a meshing state, avoiding problems such as meshing offset, skipping teeth, jamming teeth, and excessive wear, ensuring the continuity and stability of power transmission, and extending the service life of transmission components. At the same time, the structural design of the first disc 114 being larger than the second disc 115 can effectively increase the turning radius of the second protrusion 117 on the first disc 114, ensuring that the second protrusion 117 and the first protrusion 116 have sufficient and stable top-abutting contact stroke, so that the second disc 115 can obtain sufficient and effective up-and-down reciprocating lifting stroke, ensuring that the piston plate 124 moves sufficiently, so that the sealing airbag 131 can fully contract and expand, achieving complete conduction and complete blockage of the pipeline.

[0045] In the example of this application, the inner wall of the strip groove 126 is provided with a second sliding groove 127, and a second slider 128 is fixedly installed on the side of the fixing frame 121 near the second sliding groove 127. The size of the second slider 128 is adapted to the size of the second sliding groove 127, and the second slider 128 is slidably connected to the second sliding groove 127. A second spring 129 is fixedly installed in the inner cavity of the second sliding groove 127, and the other end of the second spring 129 is fixedly connected to the lower end of the second slider 128. A counterweight 133 is provided in the middle of the inner cavity of the second disc 115.

[0046] As a preferred example of the present invention, during the reciprocating motion of the fixed frame 121, the second sliders 128 on both sides of the fixed frame 121 always slide vertically along the second slide groove 127 inside the fixed block 125. The cooperation between the slide groove and the slider provides vertical guidance and horizontal limitation for the fixed frame 121, effectively restricting lateral displacement and tilting of the fixed frame 121. This ensures that the fixed frame 121, the second disc 115, and the piston plate 124 always maintain vertical lifting motion, avoiding problems such as air pressure seal failure and transmission jamming caused by misalignment. The second slide groove 127 is internally designed with... The second spring 129 is connected to the second slider 128. It pushes against and stores elastic force on the fixed frame 121. When the upper and lower protrusions disengage, the second spring 129 releases the elastic force to pull the slider down quickly to reset, which drives the fixed frame 121 and the second disc 115 to automatically reset. This ensures that each reciprocating motion cycle can be completed automatically, continuously, and stably, realizing uninterrupted periodic filling action. The counterweight 133 is used to increase the downward reset pressure of the second disc 115, which, together with the second spring 129, ensures that the second disc falls quickly and reliably after the protrusions disengage.

[0047] In the example of this application, the centrifugal adjustment assembly includes a first groove 120 formed on a first disc 114, a first slider 118 fixedly installed on the side of the second protrusion 117 near the first groove 120, the first slider 118 being disposed in the lower middle part of the second protrusion 117, a first spring 119 fixedly installed in the inner cavity of the first groove 120, and the other end of the first spring 119 being fixedly connected to the first slider 118.

[0048] As a preferred example of the present invention, when the equipment is working, the first disc 114 rotates synchronously with the deceleration drive impeller 105. The emulsion flow rate directly determines the speed of the impeller and the disc. When the emulsion flow rate and velocity of the production line increase, the emulsion impact intensity increases, the impeller speed increases significantly, and the speed of the first disc 114 increases synchronously. The centrifugal force on the first slider 118 at the bottom of the second protrusion 117 increases synchronously, overcoming the elastic force of the first spring 119 and sliding outward along the first slide groove 120, thereby increasing the radial extension distance of the second protrusion 117. After the extension of the second protrusion 117 increases, the effective stroke of the first disc 114 rotating and pushing the second disc 115 increases, thereby increasing the upward stroke of the fixed frame 121. The upward movement of piston plate 124 increases synchronously, the negative pressure suction volume of cavity 123 increases, the contraction amplitude of sealing airbag 131 is larger, and the cross-sectional area of ​​pipeline is larger, increasing the flow rate of defoamer per unit time. This enables the addition of a large dose of defoamer to match the large flow rate of emulsion. Conversely, when the emulsion flow rate decreases, the impeller speed decreases, the centrifugal force decreases, the first spring 119 pulls the first slider 118 to return to its original position, the extension of the second protrusion 117 decreases, the pushing stroke is shortened, the contraction amplitude of airbag decreases, the pipeline conductivity decreases, and the amount of defoamer added automatically decreases. Through the dynamic balance between centrifugal force and spring force, the addition amount is adaptively adjusted in real time according to the emulsion flow rate, thereby solving the problem of imbalance in the ratio under fluctuating flow conditions.

[0049] In the example of this application, the stirring assembly includes a stirring motor 201 installed on the side of the second mixing chamber 103 away from the defoamer injection pipe 107. A stirring rod 202 is fixedly installed on the drive end of the stirring motor 201. Multiple sets of stirring blades 203 are detachably installed on the outside of the stirring rod 202. The stirring rod 202 is located below the liquid outlet 109.

[0050] As a preferred example of the present invention, when the pre-mixed emulsion and defoamer mixture falls uniformly from the outlet 109 of the first mixing chamber 101, it directly enters the stirring area inside the second mixing chamber 103. The stirring motor 201 independently drives the stirring rod 202 to rotate continuously, driving multiple sets of stirring blades 203 to perform real-time shearing, dispersing, and turbulent stirring on the falling material, effectively breaking the agglomeration formed during the falling process, promoting the full dispersion and penetration of defoamer particles into the acrylic emulsion system, thoroughly solving the problem of local unevenness remaining after preliminary mixing, and achieving deep homogeneous mixing. The stirring blades 203 adopt a detachable structure, and the blade structure can be flexibly replaced according to the emulsion viscosity and production conditions to adapt to the production needs of various emulsions with high viscosity and conventional viscosity, ensuring excellent mixing effect under different working conditions.

[0051] In the example of this application, the defoaming component includes a buoyancy frame 204 disposed above the inner cavity of the second mixing chamber 103. Two buoyancy frames 204 are provided, and the buoyancy frames 204 are attached to the inner wall of the second mixing chamber 103. The upper and lower end faces of the buoyancy frames 204 are provided with continuous defoaming protrusions 205 along the circumference of the frame. The cross-section of the defoaming protrusions 205 is wedge-shaped. A fixing rod 206 is fixedly installed on the inner side of the buoyancy frame 204. A fixing plate 207 is welded to the upper end of the fixing rod 206. A cam 208 is fixedly installed in the middle of the first rotating rod 106.

[0052] As a preferred example of the present invention, two sets of buoyancy frames 204 are attached to the inner wall of the second mixing chamber 103. The buoyancy frames 204 can float adaptively with the liquid level and always fit the area where the emulsion surface meets the chamber wall, corresponding to the dead corners where bubbles accumulate. Under the action of the liquid surface circulation formed by stirring, the liquid flow carrying microbubbles continuously washes the chamber wall and contacts the wedge-shaped bubble-breaking protrusions 205 on the upper and lower end faces of the buoyancy frames 204. The microbubbles are quickly cut and punctured by the wedge-shaped protrusions, realizing passive continuous bubble breaking, effectively removing the tiny bubbles attached to the chamber wall and accumulated at the edge of the liquid surface. At the same time, during the rotation of the first rotating rod 106, the central cam 208 is driven to rotate continuously. The cam 208 periodically presses down the fixing plate 207 and the fixing rod 206, causing the buoyancy frames 204 to move up and down periodically, actively disturbing and cutting and breaking the bubbles on the liquid surface and the adhering bubbles, forming a dual defoaming effect of passive defoaming and active defoaming, thereby solving the defects of residual bubbles on the chamber wall and incomplete defoaming in traditional equipment.

[0053] In the example of this application, the cam 208 is positioned directly above the fixed rod 206, and a third spring 209 is sleeved on the outer side of the lower end of the fixed rod 206. The lower end of the third spring 209 is connected to the upper end of the second mixing chamber 103.

[0054] As a preferred example of the present invention, during the continuous rotation of the cam 208, the fixed plate 207 at the upper end of the fixed rod 206 is intermittently pressed down, causing the buoyancy frame 204 to move downward. When the cam 208 passes the highest point of the push, the downward force disappears, and the third spring 209 sleeved on the outside of the fixed rod 206 releases elastic potential energy, pushing the fixed rod 206 and the buoyancy frame 204 to quickly return to their original position. Through the continuous rotation of the cam 208 and the elastic return of the third spring 209, the buoyancy frame 204 makes high-frequency, small-amplitude, and stable up-and-down micro-movements at the liquid surface position, which greatly increases the contact frequency and disturbance range between the bubble-breaking protrusion 205 and the bubbles. This continuously cuts, tears, and breaks the bubbles adhering to the tank wall and the floating bubbles on the liquid surface, effectively avoiding the problem of long-term adhesion and accumulation of tiny bubbles that cannot be destroyed on their own. This ensures that there are no residual bubbles in the discharged emulsion and significantly improves the appearance and stability of the finished emulsion.

[0055] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dosing mixer for an aqueous acrylic emulsion defoamer, characterized in that: include; A mixing mechanism (100) includes a first mixing chamber (101), a second mixing chamber (103) disposed below the first mixing chamber (101), a deceleration mixing component for decelerating the emulsion disposed in the inner cavity of the first mixing chamber (101), an intermittent injection component disposed on one side above the first mixing chamber (101) for injecting defoamer, and a centrifugal adjustment component disposed below the intermittent injection component for adjusting the emulsion flow rate. A mixing auxiliary mechanism (200) is disposed in the inner cavity of the second mixing chamber (103). The mixing auxiliary mechanism (200) includes a stirring assembly disposed below the inner cavity of the second mixing chamber (103) for re-stirring the mixed emulsion and defoamer, and a defoaming assembly disposed above the inner cavity of the second mixing chamber (103) for defoaming the inner wall edge.

2. The dosing mixer for an aqueous acrylic emulsion defoamer according to claim 1, characterized in that: The deceleration mixing assembly includes a deceleration drive impeller (105) disposed above the inner cavity of the first mixing chamber (101). The upper middle part of the first mixing chamber (101) is connected to a liquid inlet pipe (102). The lower end of the inner cavity of the first mixing chamber (101) is provided with multiple liquid outlets (109). The liquid outlets (109) are disposed below the deceleration drive impeller (105). The lower end of the first mixing chamber (101) is connected to the upper end of the second mixing chamber (103). The lower liquid outlet of the second mixing chamber (103) is connected to a liquid outlet pipe (104). The middle two sides of the deceleration drive impeller (105) are fixedly installed with first rotating rods (106). The first rotating rods (106) are rotatably connected to the first mixing chamber (101) through sealed bearings.

3. The dosing mixer for an aqueous acrylic emulsion defoamer according to claim 2, characterized in that: The intermittent filling assembly includes a first bevel gear (110) mounted on a first rotating rod (106), a second rotating rod (111) above the first bevel gear (110), a second bevel gear (113) fixedly mounted at the lower end of the second rotating rod (111), a first disc (114) fixedly mounted at the upper end of the second rotating rod (111), a second disc (115) above the first disc (114), a second protrusion (117) above the first disc (114), a first protrusion (116) below the second disc (115), and a fixing frame (121) fixedly mounted at the upper end of the second disc (115).

4. The dosing mixer for an aqueous acrylic emulsion defoamer according to claim 3, characterized in that: A defoamer injection pipe (107) is provided on one side above the first mixing chamber (101). The outlet end of the defoamer injection pipe (107) is connected to multiple diversion pipes (108). The end of the diversion pipes (108) is connected to the inlet end of the first mixing chamber (101). A fixing block (125) is fixedly connected to the outside of the defoamer injection pipe (107). A strip groove (126) is opened through the inside of the fixing block (125). The two sides of the fixing frame (121) are respectively movably inserted through the inside of two strip grooves (126). A shell (122) is provided above the fixing block (125). A cavity (123) is provided in the middle of the inner cavity of the housing (122). A piston plate (124) is provided inside the cavity (123). The upper end of the piston plate (124) is fixedly connected to the upper middle of the fixed frame (121). A sealing block (130) is fixedly installed in the middle of the inner cavity of the defoamer injection pipe (107). The sealing block (130) is located directly below the housing (122). Sealing airbags (131) are bonded to both sides of the sealing block (130). A hose (132) is connected to the air outlet of the cavity (123). The other end of the hose (132) is connected to the air inlet of the sealing airbag (131).

5. The dosing mixer for an aqueous acrylic emulsion defoamer according to claim 4, characterized in that: A support frame (112) is provided on the outer side of the upper end of the second rotating rod (111). The end of the support frame (112) near the second rotating rod (111) is rotatably connected to the second rotating rod (111) through a bearing seat. The first bevel gear (110) meshes with the second bevel gear (113). The size of the first disk (114) is larger than the size of the second disk (115).

6. The dosing mixer for an aqueous acrylic emulsion defoamer according to claim 5, characterized in that: The inner wall of the strip groove (126) is provided with a second sliding groove (127). The fixed bracket (121) is fixedly installed with a second slider (128) on the side near the second sliding groove (127). The size of the second slider (128) is adapted to the size of the second sliding groove (127), and the second slider (128) is slidably connected to the second sliding groove (127). A second spring (129) is fixedly installed in the inner cavity of the second sliding groove (127). The other end of the second spring (129) is fixedly connected to the lower end of the second slider (128). A counterweight (133) is provided in the middle of the inner cavity of the second disc (115).

7. The dosing mixer for an aqueous acrylic emulsion defoamer according to claim 6, characterized in that: The centrifugal adjustment assembly includes a first groove (120) formed on a first disc (114), a first slider (118) fixedly installed on the side of the second protrusion (117) near the first groove (120), the first slider (118) being located in the lower middle part of the second protrusion (117), a first spring (119) fixedly installed in the inner cavity of the first groove (120), and the other end of the first spring (119) being fixedly connected to the first slider (118).

8. The dosing mixer for an aqueous acrylic emulsion defoamer according to claim 7, characterized in that: The stirring assembly includes a stirring motor (201) installed on the side of the second mixing chamber (103) away from the defoamer injection pipe (107). The driving end of the stirring motor (201) is fixedly equipped with a stirring rod (202). Multiple sets of stirring blades (203) are detachably installed on the outside of the stirring rod (202). The stirring rod (202) is located below the liquid outlet (109).

9. The dosing mixer for an aqueous acrylic emulsion defoamer according to claim 8, characterized in that: The defoaming component includes a buoyancy frame (204) disposed above the inner cavity of the second mixing chamber (103). Two buoyancy frames (204) are provided, and the buoyancy frames (204) are attached to the inner wall of the second mixing chamber (103). The upper and lower surfaces of the buoyancy frames (204) are provided with continuous defoaming protrusions (205) along the circumference of the frame. The cross-section of the defoaming protrusions (205) is wedge-shaped. A fixing rod (206) is fixedly installed on the inner side of the buoyancy frame (204). A fixing plate (207) is welded to the upper end of the fixing rod (206). A cam (208) is fixedly installed in the middle of the first rotating rod (106).

10. The dosing mixer for an aqueous acrylic emulsion defoamer according to claim 9, characterized in that: The cam (208) is positioned directly above the fixed rod (206), and a third spring (209) is sleeved on the outer side of the lower end of the fixed rod (206). The lower end of the third spring (209) is connected to the upper end of the second mixing chamber (103).

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