Mixer with defoaming function and method of using the same

Abstract

The present invention relates to the technical field of liquid mixing equipment, and discloses a mixer with a degassing function and a method for using the mixer. The mixer with a degassing function comprises: a mixing barrel; a barrel cover, which detachably closes the top opening of the mixing barrel; a stirring motor, which is arranged on the barrel cover; a stirring shaft, which extends into the mixing barrel and is driven to rotate by the stirring motor; a pressure cover driver, which is arranged on the barrel cover; a compression cover, which is moved toward the bottom wall of the mixing barrel by the pressure cover driver, and a through shaft hole is provided on the compression cover; and a negative pressure device, which is connected to the interior of the mixing barrel through a pipeline. The mixer with a degassing function of the present invention is designed with a pressure cover driver, which is performed before or after stirring the liquid. First, the negative pressure device is started, and the pressure cover is driven by the pressure cover driver to move toward the bottom surface of the mixing barrel and contact the liquid in the mixing barrel, thereby increasing the internal pressure of the liquid, so that the bubbles inside the liquid are broken and refined, which is convenient for degassing. In addition, a negative pressure device is also configured to enhance the degassing effect of the liquid.

Description

Technical Field

[0001] The invention relates to the technical field of liquid mixing equipment, in particular to a stirrer with a degassing function and a use method thereof. Background Art

[0002] Liquids need to be stirred when mixing additives. Air or other gases will inevitably be mixed into the mixing process to form bubbles. If these bubbles are not effectively removed, they will have a negative impact on the performance and application of the liquid. For example, in industrial applications such as coatings, adhesives, inks, and resins, the presence of bubbles can lead to uneven coating, decreased bonding strength, poor printing quality, unstable material properties, and other problems. Therefore, stirring and degassing liquids is a key step to ensure product quality and performance.

[0003] At present, the main method of stirring degassing is stirring combined with vacuum-assisted degassing. The above methods can play a good degassing role for general liquids, but for high-viscosity liquids, the degassing ability of the above two methods of stirring is limited.

[0004] Therefore, there is still room for improvement in the solutions in the prior art. Summary of the invention

[0005] The present invention aims to improve at least one technical problem in the background technology.

[0006] A first aspect of the present invention provides a mixer with a defoaming function, comprising:

[0007] Mixing tank;

[0008] A barrel cover, detachably closing the top opening of the mixing barrel;

[0009] A stirring motor is arranged on the barrel cover;

[0010] A stirring shaft extends into the stirring barrel and is driven to rotate by the stirring motor;

[0011] A capping driver, arranged on the barrel cover;

[0012] A compression cover, the compression cover driver moves toward the bottom wall of the mixing barrel, and the compression cover is provided with a through shaft hole;

[0013] The negative pressure device is connected with the interior of the mixing barrel through a pipeline.

[0014] The beneficial effects of the first aspect of the present invention: the mixer with degassing function of the present invention is designed with a pressure cover driver, which is performed before or after stirring the liquid. The negative pressure device is first started, and the compression cover is driven by the pressure cover driver to move to the bottom surface of the mixing barrel and contact with the liquid in the mixing barrel, thereby increasing the internal pressure of the liquid, breaking and refining the bubbles inside the liquid to facilitate degassing. In addition, a negative pressure device is also configured to enhance the degassing effect of the liquid.

[0015] As some sub-solutions of the above technical solution, an exhaust gap is left between the compression cover and the inner wall of the mixing barrel.

[0016] As some sub-solutions of the above technical solution, a pressure relief gap is left between the inner wall of the shaft hole and the stirring shaft.

[0017] As some sub-solutions of the above technical solution, the mixer also includes a cleaning mechanism for cleaning the inner side of the shaft hole.

[0018] As some sub-schemes of the above technical scheme, the cleaning mechanism includes a cleaning ring, which is fixedly connected to the stirring shaft, and a conical surface is provided on the lower side of the cleaning ring. The inner diameter of the lower end of the conical surface is smaller than the inner diameter of the upper end, and the outer diameter of the cleaning ring is the same as the inner diameter of the shaft hole.

[0019] As some sub-schemes of the above technical scheme, the mixer also includes a first ultrasonic transducer, a first amplitude transformer, a second ultrasonic transducer and a second amplitude transformer, the first ultrasonic transducer is fixedly connected to the first amplitude transformer, the first amplitude transformer is arranged on the barrel cover, the first amplitude transformer passes through the compression cover and extends into the mixing barrel, the second ultrasonic transducer is fixedly connected to the second amplitude transformer, the second amplitude transformer passes through the bottom wall of the mixing barrel and extends into the mixing barrel, the first ultrasonic transducer excites vibration in the up and down directions through the first amplitude transformer, the second ultrasonic transducer excites vibration in the up and down directions through the second amplitude transformer, and the vibration axis of the first ultrasonic transducer and the vibration axis of the second ultrasonic transducer are not colinear with each other.

[0020] As some sub-solutions of the above technical solution, the mixer also includes a lifting drive, which is arranged on the barrel cover and is drivingly connected to the first ultrasonic transducer.

[0021] A second aspect of the present invention provides a method for using a mixer with a degassing function, including a mixer with a degassing function, wherein the method comprises the following steps:

[0022] A: Inject liquid into the mixing barrel and start the negative pressure device;

[0023] B: Start the compression cover driver to drive the compression cover to move downward to compress the liquid;

[0024] C: After compressing the liquid, start the capping driver to make the compression cap leave the liquid;

[0025] D: Start the first ultrasonic transducer and the second ultrasonic transducer;

[0026] E: Start the stirring motor, and the shaft hole of the compression cover contacts the cleaning ring for cleaning;

[0027] F: Start the compression cover driver to drive the compression cover to move downward and away from the cleaning ring;

[0028] G: Continue stirring for a while and then stop.

[0029] The beneficial effect of the second aspect of the present invention: the above operation enhances the bubble breaking effect by pressurizing the liquid, and further refines the bubbles by ultrasonic composite energy, further ensuring the bubble breaking effect and improving the degassing effect and degassing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0031] Figure 1 It is a structural schematic diagram of a mixer with a defoaming function;

[0032] Figure 2 This is the internal structure diagram of a blender with a degassing function;

[0033] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0034] Figure 4 It is a schematic diagram of the structure after the compression cover leaves the cleaning ring;

[0035] Figure 5 for Figure 4 A partial enlarged view of point B in the middle;

[0036] Figure 6 Schematic diagram of ultrasonic compounding.

[0037] In the attached figure:

[0038] 1-Mixing bucket;

[0039] 2-barrel cover;

[0040] 3-Stirring motor;

[0041] 4- stirring shaft; 40- pressure relief gap;

[0042] 5- gland driver;

[0043] 6- Compression cover;

[0044] 70-intersection line; 71-first horn; 72-second horn; 73-lifting drive;

[0045] 8- cleaning ring; 81- cone surface. DETAILED DESCRIPTION

[0046] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0047] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0048] In the description of the present invention, the meaning of "several" is an indefinite quantity, the meaning of "multiple" is more than two, "greater than", "less than", "exceed", etc. are understood as not including the number itself, and "above", "below", "within", etc. are understood as including the number itself. If there is a description of the first and the second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features. The "and / or" that appears in the full text represents three parallel solutions. For example, A and / or B represents the solution satisfied by A, the solution satisfied by B, or the solution satisfied by both A and B.

[0049] In the description of the present invention, if there is a short sentence containing multiple parallel features, the attributive defines the closest feature, for example: B, C, and E connected to D are arranged on A, which means that B is arranged on A and E is connected to D, and does not constitute a limitation on C; but attributives that indicate the relationship between features, such as "interval arrangement" or "circular arrangement", do not belong to this category. If the word "all" is preceded by an attributive, it means that all features in the short sentence are limited, such as B, C, and D are all arranged on A, which means that B, C, and D are all arranged on A. For a sentence with an omitted subject, the omitted subject is the subject of the previous sentence, that is, B is arranged on A, including C, which means that B is arranged on A and A includes C.

[0050] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0051] Combine the following Figures 1 to 6 Embodiments of the present invention are described.

[0052] This embodiment relates to a mixer with a degassing function and a method of using the mixer, which is particularly suitable for degassing high-viscosity liquids. Since high-viscosity liquids have poor fluidity, the bubbles trapped inside the liquid squeeze out of the channel and escape from the liquid. The main degassing method currently used is high-speed stirring combined with negative pressure adsorption. When stirring high-viscosity liquids, the driving force of the motor is required to be high, the high-speed stirring consumes a lot of power, and the motor load is large, which has many inconveniences and the actual degassing effect is limited.

[0053] Reference Figure 1 and Figure 2 The mixer with defoaming function in this embodiment includes:

[0054] Mixing tank 1;

[0055] A barrel cover 2, detachably closing the top opening of the mixing barrel 1;

[0056] A stirring motor 3 is arranged on the barrel cover 2;

[0057] The stirring shaft 4 extends into the stirring barrel 1 and is driven to rotate by the stirring motor 3;

[0058] A capping driver 5 is provided on the barrel cover 2;

[0059] A compression cover 6, the compression cover driver 5 moves toward the bottom wall of the mixing barrel 1, and a through shaft hole is provided on the compression cover 6;

[0060] The negative pressure device (not shown in the figure) is connected to the interior of the mixing barrel 1 through a pipeline.

[0061] The mixer with degassing function of the present invention is designed with a capping driver 5. First, the negative pressure device is started, and the compression cap 6 is driven by the capping driver 5 to move toward the bottom surface of the mixing barrel 1 and contact with the liquid in the mixing barrel 1, thereby increasing the internal pressure of the liquid, promoting the flow of the liquid, and breaking and refining the bubbles in the liquid to facilitate degassing. In addition, a negative pressure device is also configured to connect to the interior of the mixing barrel 1, so as to absorb the gas in the mixing barrel 1 in time, thereby improving the degassing effect of the liquid and reducing the phenomenon of bubbles re-mixing into the liquid during the stirring process.

[0062] Specifically, after the liquid is compressed by the compression cover 6, the compression cover 6 is driven to move upward and withdraw to remain above the liquid surface. The compression cover 6 in this embodiment pressurizes the liquid to remove bubbles, which may be performed before or after stirring the liquid.

[0063] Reference Figure 3 and Figure 4In order to ensure the safety when compressing the gas, a pressure relief gap 40 is left between the inner wall of the shaft hole and the stirring shaft 4. After the pressure relief gap 40 is set, when the liquid is compressed by the compression cover 6, the excessive internal pressure of the liquid can flow out through the pressure relief gap 40, thereby reducing the internal pressure of the liquid and avoiding accidents caused by excessive pressure.

[0064] The bubbles escaping from the liquid are mainly discharged through the pressure relief gap 40, and in order to further improve the exhaust capacity, an exhaust gap is reserved between the compression cover 6 and the inner wall of the mixing barrel 1. The exhaust gap is reserved between the compression cover 6 and the inner wall of the mixing barrel 1, which is conducive to exhausting the gas inside the liquid when the liquid is stirred.

[0065] When the width of the pressure relief gap 40 is too large, the pressure that can be formed on the liquid is small, and when the width of the pressure relief gap 40 is too small, it is difficult for bubbles to be discharged through the pressure relief gap 40. In this embodiment, the width of the pressure relief gap 40 is between 6 and 10 mm, so as to better form a large pressure on the liquid and the need for bubbles to be discharged through the pressure relief gap 40. More specifically, the pressure relief gap 40 in this embodiment is 7.2 mm. The width of the exhaust gap in this embodiment is 0.3 mm to 1 mm.

[0066] After the pressure relief gap 40 is designed, the internal liquid flows out from the pressure relief gap 40 when the pressure is too high. However, since the pressure relief gap 40 is small, the liquid flowing through the pressure relief gap 40 may remain in the pressure relief gap 40 after the pressure is released, causing blockage and hindering normal exhaust, especially for high-viscosity liquids with poor fluidity. For this reason, the mixer also includes a cleaning mechanism for cleaning the inner side of the shaft hole.

[0067] Specifically, the cleaning mechanism includes a cleaning ring 8, which is fixedly connected to the stirring shaft 4. A conical surface 81 is provided on the lower side of the cleaning ring 8. The inner diameter of the lower end of the conical surface 81 is smaller than the inner diameter of the upper end. The outer diameter of the cleaning ring 8 is the same as the inner diameter of the shaft hole. The cleaning ring 8 is fixedly connected to the stirring shaft 4 and can follow the movement when the stirring shaft 4 rotates. The conical surface 81 on the lower side of the cleaning ring 8 can, on the one hand, play a guiding role so that the cleaning ring 8 can be inserted into the shaft hole from the top of the shaft hole. On the other hand, the conical surface 81 can throw the liquid on the surface of the conical surface 81 downward when rotating, so as to throw it back to the liquid surface and not easily adhere to other wall surfaces. After the liquid is pressurized by the compression cover 6, the pressure cover driver 5 rises to make the shaft hole contact with the cleaning ring 8, and then the stirring shaft 4 is started to rotate at a low speed to clean the shaft hole.

[0068] In order to further improve the degassing effect, the mixer also includes a first ultrasonic transducer, a first horn 71, a second ultrasonic transducer and a second horn 72, wherein the first ultrasonic transducer is fixedly connected to the first horn 71, the first horn 71 is arranged on the barrel cover 2, the first horn 71 passes through the compression cover 6 and extends into the mixing barrel 1, the second ultrasonic transducer is fixedly connected to the second horn 72, the second horn 72 passes through the bottom wall of the mixing barrel 1 and extends into the mixing barrel 1, the first ultrasonic transducer excites vibration in the up-down direction through the first horn 71, the second ultrasonic transducer excites vibration in the up-down direction through the second horn 72, and the vibration axis of the first ultrasonic transducer and the vibration axis of the second ultrasonic transducer are not collinear. The first ultrasonic transducer and the second ultrasonic transducer are used together to excite liquid vibration, thereby further refining the bubbles in the liquid and further improving the escape rate of the bubbles. The first horn 71 and the second horn 72 are not collinear, so that the first vibration wave excited by the first horn 71 and the second vibration wave excited by the second horn 72 can form an oblique intersection line 70, and the ultrasonic energy of the two first vibration waves and the second vibration wave are combined at the intersection line 70, so as to increase the ultrasonic energy, and ultrasonically degas the bubbles and thus the liquid at all heights, so as to more fully degas the liquid. It can be understood that in order to allow the first vibration wave and the second vibration wave to be able to be combined normally, the frequency and phase of the first vibration wave and the second vibration wave should be kept the same.

[0069] The mixer further comprises a lifting driver 73, which is arranged on the barrel cover 2 and is drivingly connected to the first ultrasonic transducer. The configuration of the lifting driver 73 can change the height position of the first horn 71, thereby changing the height position of the first ultrasonic transducer, changing the angle of the intersection line 70, extending the length of the intersection line 70 in the liquid, and more fully utilizing the composite ultrasonic energy for degassing.

[0070] When the liquid is in a static state, the intersection line 70 of the first vibration wave excited by the first horn 71 and the second vibration wave excited by the second horn 72 is an oblique line. When the relative positions of the first horn 71 and the second ultrasonic horn are changed, the inclination direction of the intersection line 70 changes accordingly.

[0071] When the liquid in the mixing barrel 1 is stirred, the vibration wave excited by the horn (referring to the first horn 71 or the second horn 72) has a motion component of plane diffusion in the process of diffusion, and also has a rotation component following the rotation of the liquid, which affects the recombination of the two ultrasonic waves. However, since the propagation speed of ultrasonic waves in water is about 1500 meters per second, the ultrasonic waves are basically not deflected with the rotation of the liquid. In order to minimize the impact of rotation on the recombination of the two ultrasonic waves, in this embodiment, when the first ultrasonic transducer and the second ultrasonic transducer are enabled, the stirring motor 3 only stirs at a low speed, and the specific stirring speed is 20~40rpm. The ultrasonic frequency range can be above 30000Hz.

[0072] The method of using a blender with a defoaming function includes the following steps:

[0073] A: Liquid is injected into the mixing barrel 1 and the negative pressure device is started. The injected liquid can be a high-viscosity liquid or a low-viscosity liquid. Before injecting the liquid, the barrel cover 2 is disassembled, and the compression cover 6 is separated from the mixing barrel 1 to open the opening of the mixing barrel 1 so as to quickly inject the liquid to be defoamed and stirred. After injecting the liquid, the barrel cover 2 is reinstalled on the mixing barrel 1; the detachable connection structure between the barrel cover 2 and the mixing barrel 1 can adopt the structure in the prior art, and the negative pressure device can adopt the vacuum generator in the prior art, and the negative pressure end of the vacuum generator is connected to the inside of the mixing barrel 1 through a pipeline, so as to achieve the effect of generating negative pressure inside the mixing barrel 1.

[0074] B: Start the compression cover driver 5 to drive the compression cover 6 to move downward to compress the liquid, so as to increase the internal pressure of the liquid and promote the breaking of bubbles;

[0075] C: After compressing the liquid, start the capping driver 5 to make the compression cap 6 leave the liquid;

[0076] D: Start the first ultrasonic transducer and the second ultrasonic transducer to excite ultrasonic waves inside the liquid, and break the bubbles in the liquid by ultrasonic waves;

[0077] E: Start the stirring motor 3, the shaft hole of the compression cover 6 contacts with the cleaning ring 8 for cleaning, and the cleaning ring 8 rotates the shaft hole to scrape off the liquid in the shaft hole;

[0078] F: Start the compression cover driver 5 to drive the compression cover 6 to move downward away from the cleaning ring 8, and open the pressure relief gap 40 for exhaust;

[0079] G: Continue stirring for a period of time and then stop. The specific time can be set as needed, which can be one minute, two minutes, etc., and the liquid can be stopped when no bubbles are precipitated.

[0080] After stirring the liquid, the stirrer of the present invention can fully break the bubbles in the liquid, thereby improving the degassing efficiency and degassing effect of the liquid, and is particularly suitable for high-viscosity liquids.

[0081] The preferred embodiments of the present invention are described in detail above, but the present disclosure is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present disclosure.

Claims

1. A mixer with a degassing function, characterized by: include: Mixing bucket (1); A barrel cover (2) detachably closes the top opening of the mixing barrel (1); A stirring motor (3) is arranged on the barrel cover (2); A stirring shaft (4) extends into the stirring barrel (1) and is driven to rotate by the stirring motor (3); A capping driver (5) provided on the barrel cover (2); A compression cover (6), the compression cover driver (5) moves toward the bottom wall of the mixing barrel (1), and a through shaft hole is provided on the compression cover (6); A negative pressure device connected to the interior of the mixing barrel (1) through a pipeline; A pressure relief gap (40) is left between the inner wall of the shaft hole and the stirring shaft (4); The mixer also includes a cleaning mechanism for cleaning the inner side of the shaft hole; The cleaning mechanism comprises a cleaning ring (8), the cleaning ring (8) being fixedly connected to the stirring shaft (4), a conical surface (81) being provided on the lower side of the cleaning ring (8), the inner diameter of the lower end of the conical surface (81) being smaller than the inner diameter of the upper end, and the outer diameter of the cleaning ring (8) being the same as the inner diameter of the shaft hole; The mixer further comprises a first ultrasonic transducer, a first horn (71), a second ultrasonic transducer and a second horn (72); the first ultrasonic transducer is fixedly connected to the first horn (71); the first horn (71) is arranged on the barrel cover (2); the first horn (71) passes through the compression cover (6) and extends into the mixing barrel (1); the second ultrasonic transducer is fixedly connected to the second horn (72); the second horn (72) passes through the bottom wall of the mixing barrel (1) and extends into the mixing barrel (1); the first ultrasonic transducer excites vibration in an up-and-down direction through the first horn (71); the second ultrasonic transducer excites vibration in an up-and-down direction through the second horn (72); and the vibration axis of the first ultrasonic transducer and the vibration axis of the second ultrasonic transducer are not collinear with each other; The mixer further comprises a lifting drive (73), wherein the lifting drive (73) is arranged on the barrel cover (2), and the lifting drive (73) is drivingly connected to the first ultrasonic transducer.

2. The mixer with degassing function according to claim 1, characterized in that: An exhaust gap is left between the compression cover (6) and the inner wall of the mixing barrel (1).

3. The method for using the mixer with degassing function is characterized by: Applicable to the mixer with degassing function as claimed in claim 1, the method of use comprises the following steps: A: Inject liquid into the mixing barrel (1) and activate the negative pressure device; B: Start the compression cover driver (5) to drive the compression cover (6) to move downward to compress the liquid; C: After compressing the liquid, the capping driver (5) is activated to separate the compression cap (6) from the liquid; D: Start the first ultrasonic transducer and the second ultrasonic transducer; E: Start the stirring motor (3), and the shaft hole of the compression cover (6) contacts the cleaning ring (8) for cleaning; F: Start the compression cover driver (5) to drive the compression cover (6) to move downward and away from the cleaning ring (8); G: Continue stirring for a while and then stop.

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