Ultrasonic dispersion structure and dispersion device

Abstract

The invention belongs to the technical field of dispersion devices, and particularly discloses an ultrasonic dispersion structure which comprises an energy gathering cavity with a cavity. The energy converter is connected with the energy gathering cavity, the amplitude-change pole is connected into the energy converter, and at least part of the amplitude-change pole is arranged in the energy gathering cavity; at least one set of amplitude changing rods are arranged at one end of the energy gathering cavity through the energy converter, the energy converter and the amplitude changing rods are provided with coaxial through holes, the through holes are communicated with the cavity, and materials enter the cavity through the through holes. When the materials to be dispersed are conveyed and flow in the through holes, the materials are vibrated in the through holes, so that the materials are pre-dispersed, the dispersion effect is improved, the adhesive force of the materials to the inner walls of the through holes is basically eliminated, the materials (especially solid materials) cannot be adhered to and detained on the inner walls of the through holes, and the conveying capacity is stable. Meanwhile, the invention also discloses a dispersing device.

Description

Technical Field

[0001] The invention belongs to the technical field of dispersion devices, and in particular relates to an ultrasonic dispersion structure and a dispersion device. Background Art

[0002] When ultrasonic waves propagate, the ultrasonic dispersing device can induce mechanical vibrations in the materials to be dispersed, as well as shear force, impact force, and vortex flow effects. These effects work together to effectively break up and disperse the agglomerated materials, thereby dispersing the materials. Therefore, ultrasonic dispersing devices have been widely used in many industrial fields such as chemical, pharmaceutical, food, and environmental protection.

[0003] However, the ultrasonic dispersing device of the prior art has some problems in material conveying. Usually, the material is fed into the device from the feed port of the ultrasonic dispersing device with the assistance of a delivery pump. However, the delivery force of the delivery pump has a relatively weak effect on the pre-dispersion of the agglomerated material, especially when encountering materials with large agglomeration force, the delivery pump can hardly play an effective pre-dispersion role; in addition, if the material to be dispersed is solid particles, the material is also easy to adhere to the inner wall of the feed port, reducing the material conveying capacity of the feed port. Summary of the invention

[0004] The purpose of the present invention is to provide an ultrasonic dispersion structure, which can pre-disperse the material to be dispersed during transportation, and the material will not adhere to the inner wall of the feed port, thereby stabilizing the transportation capacity.

[0005] The object of the present invention is achieved through such a technical solution, specifically providing an ultrasonic dispersion structure comprising:

[0006] The energy-gathering cavity is provided with a cavity;

[0007] A transducer is connected to the energy focusing cavity;

[0008] A horn is connected to the transducer, and at least a part of the horn is disposed in the energy focusing cavity;

[0009] At least one set of variable amplitude rods is arranged at one end of the energy focusing cavity through the transducer. The transducer and the variable amplitude rod are provided with coaxial through holes, which are communicated with the cavity, and the material enters the cavity through the through holes.

[0010] Preferably, the diameter of the through hole is 3-5 mm.

[0011] Preferably, an inner groove is provided at an opening of one end of the through hole away from the transducer.

[0012] Preferably, the inner groove is in an arc shape, and its diameter is less than 3 mm.

[0013] Preferably, the port of the energy-gathering cavity is in the shape of a trumpet, which gradually becomes smaller from the port toward the energy-gathering cavity, and the amplitude-changing rod is provided with an outer shape matching the trumpet shape.

[0014] Preferably, the amplitude transformer is connected to the energy-gathering cavity through a sealing gasket.

[0015] Preferably, the transducer is provided with a first transducer and a second transducer, the first amplitude rod is installed at one end of the energy focusing cavity through the first transducer, and the second amplitude rod is installed at the other end of the energy focusing cavity through the second transducer.

[0016] Preferably, the vibration frequency of the first transducer is inconsistent with the vibration frequency of the second transducer.

[0017] Preferably, the amplitude transformer is provided with a vibration head installed at its front end, and the vibration head is provided with a guide groove along the axial outer side surface thereof.

[0018] Preferably, the guide groove is an inclined groove, and the inclination angle of the guide groove is 5°-20°.

[0019] Preferably, a discharge port and a feed port are also provided on the side of the energy-gathering cavity.

[0020] Another object of the present invention is to provide a dispersion device which can improve the dispersion effect by multi-stage dispersion after being connected in series, and can increase the processing volume per unit time and improve the dispersion efficiency after being connected in parallel.

[0021] The objective of the present invention is achieved through such a technical solution, specifically providing a dispersion device, including a plurality of ultrasonic dispersion structures, wherein the plurality of ultrasonic dispersion structures are sequentially connected in series, in parallel or in mixed connection.

[0022] Due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0023] In the above-mentioned ultrasonic dispersion structure and dispersion device, the energy-gathering cavity is provided with a cavity, the transducer and the amplitude transformer are provided with a coaxial through hole, the through hole is connected with the cavity, and the material enters the cavity through the through hole. When the material to be dispersed is transported and flows in the through hole, the amplitude transformer is vibrated by the transducer, and the material is vibrated in the through hole, which not only has a pre-dispersion effect on the material, but also the adhesion of the material to the inner wall of the through hole is basically eliminated, and the material will not adhere to the inner wall of the through hole, thereby stabilizing the conveying capacity and improving the dispersion effect. When several ultrasonic dispersion structures are connected in series, parallel or mixed, the dispersion effect and dispersion efficiency are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation of the present invention, the following will briefly introduce the drawings required for use in the specific implementation. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0025] Figure 1 It is a structural schematic diagram of an ultrasonic dispersion structure of the present invention;

[0026] Figure 2 This is an enlarged schematic diagram of the through hole;

[0027] Figure 3 It is an enlarged schematic diagram of the diversion trough;

[0028] Figure 4 The schematic diagram of installing the transducers in pairs (feeding from the through hole and the feed port);

[0029] Figure 5 Schematic diagram of transducers installed in pairs (feeding from through holes);

[0030] Figure 6 It is a schematic diagram of the series connection of the dispersion device;

[0031] Figure 7 It is a schematic diagram of the parallel connection mode of the dispersed device;

[0032] Figure 8 It is a schematic diagram of the hybrid mode of the dispersed device;

[0033] Fig. 9 Dispersion effect diagram without through-hole structure;

[0034] Fig.10 The dispersion effect diagram of the material entering from the through hole;

[0035] Fig.11 This is an electron microscope image of the agglomerated material crystals before dispersion;

[0036] Fig.12 The dispersion effect diagram of the upper ultrasound (20KHz 2000W) and lower ultrasound (28KHz 1200W) of the dispersion device;

[0037] Fig.13 The dispersion effect diagram of the upper ultrasound (28KHz 1200W) and lower ultrasound (35KHz 500W) of the dispersion device;

[0038] Fig.14 The dispersion effect diagram of the upper ultrasound (35KHz 500W) and lower ultrasound (1.7MHz 30W) of the dispersion device;

[0039] Fig.15 This is a diagram of the dispersion effect of the upper ultrasound (35KHz 500W) and lower ultrasound (3MHz 30W) of the dispersion device.

[0040] Reference numerals:

[0041] 1-energy-gathering cavity, 11-cavity, 12-discharge port, 13-feed port,

[0042] 2- transducer, 21 first transducer, 22- second transducer,

[0043] 3-horn, 31-first horn, 32-second horn, 33-vibration head, 331-guide groove, 34-sealing gasket,

[0044] 4-through hole, 41-inner groove, 42-lower opening, 43-upper opening,

[0045] 5- Delivery pump, 6- Material collection equipment. DETAILED DESCRIPTION

[0046] See also Figure 1 , Figure 2 and Figure 4 , an ultrasonic dispersion structure, including: an energy focusing cavity 1, a transducer 2 and a horn 3.

[0047] The energy-gathering cavity 1 is provided with a cavity 11, and the transducer 2 is connected to the energy-gathering cavity 1; the horn 3 is connected to the transducer 2, and the horn 3 is arranged in the energy-gathering cavity 1; at least one set of conversion horn 3 is arranged at one end of the energy-gathering cavity 1 through the transducer 2, and the transducer 2 and the horn 3 are provided with a coaxial through hole 4, and the through hole 4 is connected with the cavity 11, and the material enters the cavity 11 through the through hole 4. Specifically, the energy-gathering cavity 1 is a hollow tube body, and is provided with a cavity 11 matched with the horn 3. The transducer 2 is connected to the external power, and a discharge port 12 is provided on the upper side of the energy-gathering cavity 1. Preferably, the transducer 2 and the horn 3 are integrally formed, so as to facilitate the processing of the coaxial through hole 4 with high precision and reduce the material flow resistance. The through hole 4 is provided with openings at both ends, which are an upper opening 43 and a lower opening 42 respectively. The opening in the transducer 2 is the lower opening 42, which is connected to the output port of the external delivery pump 5, and the material to be dispersed is delivered to the lower opening 42 by the delivery pump 5. The other opening of the through hole 4 is provided at the end of the horn 3, which is the upper opening 43, and the upper opening 43 is connected to the cavity 11. Preferably, the through hole 4 is provided along the axial center of the transducer 2 and the horn 3; the transducer 2 adopts an ultrasonic transducer. Using the existing technology, a flange is provided on the end side of the energy focusing cavity 1, and the end of the transducer 2 is fixed to the outer surface of the flange by a hexagonal bolt.

[0048] When using the ultrasonic dispersion structure of the present invention, the external power drives the transducer 2 to work, and the transducer 2 drives the horn 3 to work. The delivery pump 5 delivers the material to be dispersed from the through hole 4 into the energy-gathering cavity 1. When the material to be dispersed is transported and flows in the through hole 4, first, it moves along the lower opening 42 to the upper opening 43 due to the pressure of the delivery pump 5 and enters the cavity 11; second, the horn 3 is vibrated by the transducer 2, and the material is always vibrated in the through hole 4, breaking and dispersing part of the agglomerated material, achieving a pre-dispersion effect; third, under the effect of vibration, the adhesion of the material to the inner wall of the through hole 4 is basically eliminated, the material will not adhere to the inner wall of the through hole 4, and will not block the through hole 4, and the delivery capacity is stable; fourth, when the material flows in the narrow through hole 4, under the pressure of the delivery pump 5 and the force of the transducer 2, it plays a role of gathering flow and energy, and forcefully rushes out of the through hole 4 into the cavity 11, and the dispersion effect is better. This structure is adopted to avoid the existing ultrasonic dispersion equipment simply placing the amplitude transformer in the middle of the material to be dispersed. Under this placement method, the vibration amplitude gradually decreases outward from the axis diameter of the amplitude transformer, resulting in a larger difference in dispersion effect between the material far away from the amplitude transformer and the material close to the amplitude transformer, resulting in uneven dispersion.

[0049] Application Example 1

[0050] In the experiment of making microcapsules coated with vegetable oil, under the same conditions, the only difference is that the transducer 2 and the horn 3 are provided with through holes 4, the material is corn oil, and the coating material is 15% PVA aqueous solution. Fig. 9 In order to achieve the dispersion effect without using the through hole 4 structure, the material enters the energy-gathering cavity 1 from the conventional feed port. From the microscope picture, it can be seen from the experimental results that some microcapsules with slightly larger particle sizes exist inside; Fig.10 In the dispersion effect diagram of the material entering through the through hole 4, it can be seen that the capsule particle size is relatively uniform. The through hole 4 structure is set up, and the material dispersion effect is better due to the pre-dispersion force.

[0051] See also Figure 2 , further, the diameter of the through hole 4 is 3-5mm. The present invention sets the through hole 4 at the center of the axis of the transducer 2 and the amplitude transformer 3 to realize the material conveying channel. Under the pressure of the conveying pump and the force of the transducer 2, the side walls of the transducer 2 and the amplitude transformer 3 need to withstand a certain pressure strength. Therefore, the opening diameter of the through hole 4 must reserve sufficient thickness to ensure the structural strength of the transducer 2 and the amplitude transformer 3. The diameter range of the through hole 4 is 3-5mm. Preferably, the diameter of the through hole 4 is 4.5mm. The large diameter not only makes it easy to process the through hole 4 and improves the processing quality, but also the outflow of the material per unit time is relatively large when it is used. Exceeding 4.5mm, the thickness of the side wall is easily affected by the negative tolerance of the outer diameter of the transducer 2 and the amplitude transformer 3.

[0052] See also Figure 2 , further, an inner groove 41 is provided at one end of the through hole 4 away from the transducer 2. Specifically, an inner groove 41 is provided near the upper opening 43 of the through hole 4, and the inner groove 41 is an inward concave arc. The main purpose of providing the inner groove 41 is to gather the ejected material, increase the outlet pressure of the material, further increase the outlet speed of the material, and improve the dispersion efficiency and uniformity of the material. Preferably, the diameter of the inner groove 41 is less than 3 mm.

[0053] See also Figure 1 and Figure 2 Furthermore, the port of the energy focusing cavity 1 is in a trumpet shape, which gradually becomes smaller from the port to the inside of the energy focusing cavity 1, and the horn 3 is provided with an outer shape matching the trumpet shape. Specifically, the diameter of the cavity 11 is slightly larger than the outer diameter of the horn 3. With this structure, the horn 3 moves smoothly, which facilitates the focusing of vibration energy.

[0054] See also Figure 4 , further, the horn 3 is connected to the energy focusing cavity 1 through a sealing gasket 34. Specifically, a sealing groove is provided on the outer wall of the horn 3, and the sealing gasket 34 is installed in the sealing groove, and is installed in the energy focusing cavity 1 through an interference fit. According to the design concept of the Langevin transducer, the length of the horn 3 is half the wavelength of the wave frequency of the transducer 2, and the sealing position of the horn 3 and the energy focusing cavity 1 meets the quarter wavelength of the wave frequency of the transducer 2. The specific size is calculated according to the length of the horn 3 at different ultrasonic frequencies. The sealing structure enables the energy focusing cavity 1 to concentrate the energy ultrasound in a small space, which has a better effect on the dispersed materials.

[0055] See also Figure 4 Furthermore, the transducer 2 is provided with a first transducer 21 and a second transducer 22. The first amplitude transformer 31 is installed at one end of the energy focusing cavity 1 through the first transducer 21, and the second amplitude transformer 32 is installed at the other end of the energy focusing cavity 1 through the second transducer 22. Specifically, two sets of transducers 2 and amplitude transformers 3 installed opposite to each other are correspondingly installed at the two ends of the energy focusing cavity 1. The two amplitude transformers 3 are opposite to each other, and the whole structure is installed vertically. With the upper and lower relative structure, the materials at both ends move at the same speed and in opposite directions. The materials collide back and forth directly in the two high-energy intervals, and the energy transferred to the materials is the highest, so that the collision speed of the materials reaches twice that of a single amplitude transformer 3, thereby accelerating the impact and dispersion effect. Figure 5 It should be noted that, according to actual needs, the first transducer 21 and the first amplitude transformer 31 are provided with a through hole 4, or the first transducer 21 and the first amplitude transformer 31 and the second transducer 22 and the second amplitude transformer 32 all adopt a coaxial through hole 4 structure, and different or the same materials flow from the top and bottom through holes 4 simultaneously into the energy focusing cavity 1 for dispersion, thereby increasing application scenarios and improving dispersion efficiency.

[0056] Further, the vibration frequency of the first transducer 21 is inconsistent with the vibration frequency of the second transducer 22. Specifically, transducers 2 of different frequencies are used, and different powers can be used at the same time, and their frequency composition includes all frequencies used by ultrasonic transducers, including but not limited to 20KHz, 28KHz, 35KHz, 40KHz, 80Khz, 1.7MHz, 3Mhz, 5Mhz.

[0057] Application Example 2

[0058] For agglomerated material crystals ( Fig.11 , electron microscope picture before dispersion), the dispersion effect is compared under the influence of the vibration frequency and power of the first transducer 21 and the vibration frequency and power of the second transducer 22.

[0059]

[0060] comprehensive Figure 12 to Figure 15 The electron microscope pictures are summarized as follows:

[0061] Fig.12 Because the ultrasonic power is the largest, the raw materials are broken into 0.5nm particles, with good crushing effect, which is suitable for materials that need further crushing and dispersion.

[0062] Fig.13 , the power is slightly weaker, but it can still crush materials, and because the vibration frequency is increased, the dispersion effect is slightly better than Figure D, and the crushing effect is slightly weaker.

[0063] Fig.14 The frequency difference is obvious, which slightly destroys the original crystal size of the material and can disperse the material according to the original crystal size.

[0064] Fig.15 The frequency difference is greater, and it has no damage to the original crystal size of the material, and only serves to disperse the agglomerated state of the original crystal.

[0065] Therefore, the greater the power, the stronger the effect of grinding and breaking the material particles, and the greater the frequency difference, the better it can break up the agglomeration and keep the original crystal structure of the material intact. In actual application, the frequency and power can be selected according to the actual situation.

[0066] See also Figure 1 and Figure 3Furthermore, the horn 3 is provided with a vibration head 33 installed at its front end, and the vibration head 33 is provided with a guide groove 331 along its axial outer surface. Specifically, the horn 3 and the vibration head 33 are formed in one piece to enhance the strength of the vibration head 33. The vibration head 33 is cylindrical, and the center of the end of the vibration head 33 is the real part. The guide groove 331 is arranged on the outer surface of the vibration head 33 and is arranged along the axial direction of the vibration head 33. The vibration head 33 extends into the energy-gathering cavity 1. Since the maximum vibration direction of the horn 3 is axial movement, the vibration head 33 drives the surrounding materials to move along the axial end of the vibration head 33 of the horn 3, so that the materials with higher solid content (agglomerated materials) move closer to the vibration head 33 and the guide groove 331. The structure of the guide groove 331 opens up a contact area with the material. A larger contact area can bring more upward moving energy transfer. After the material rushes out of the top along the guide groove 331 and the vibration head 33, the end of the vibration head 33 is the real part, which further pushes and hits the agglomerated material, thereby improving the material dispersion effect. This avoids the prior art of lengthening the dispersion time and ultrasonic power, and adding multiple large amplitude nodes to the horn.

[0067] When in use, the material enters the cavity 11 from the through hole 4, and the material is dispersed simultaneously by the impact flow and ultrasonic energy. The dispersed material (light weight) moves upward along the energy-gathering cavity 1 to the discharge port 11, and the undispersed agglomerates (heavy weight) flow back to the root of the horn along the energy-gathering cavity 1, and continue to complete the second acceleration impact process under the guide groove 331 and the vibration head 33.

[0068] Application Example 3

[0069] The following experimental case compares the dispersion effect of dispersing nano-silica microspheres as an optical polarizer opening agent, and the experimental conditions are 25% solid content, the solvent is 15% PVB224 ethyl acetate solution, and no dispersing agent is added. The experimental results prove that the ultrasonic dispersion effect of setting the guide groove 331 is obvious.

[0070]

[0071] See also Figure 3 , further, the guide groove 331 is an inclined groove, and the guide groove 331 has an inclination angle of 5°-20°. Specifically, the inclination angle of the guide groove 331 is based on the busbar of the vibration head 33, and the inclination angle of the guide groove 331 and the busbar. There are multiple groups of guide grooves 331, which are evenly spaced on the outer surface of the vibration head 33. Preferably, the number of guide grooves 331 is four or six. The guide grooves 331 follow the inclination direction and are divided into left-handed for users in the southern hemisphere and right-handed for users in the northern hemisphere according to the place of use. The left-handed and right-handed grooving rules are to adapt to the rotation direction of the earth's rotation vortex, and to avoid unknown interference caused by the inconsistency between the direction of the unfinished dispersed sedimentation materials caused by the rotation of the earth and the upward direction during the rotation sedimentation.

[0072] The vibration head 33 is provided with an inclined guide groove 331, which divides the force F moving along the axial direction into two components, the axial force Fb and the radial force Fa. The larger the Fa, the smaller the upward impact force on the material. According to the principle that the radial force Fa is not greater than 1 / 3, Tan (5°) = 0.087, Tan (20°) = 0.36, so 20° is the upper limit of the inclination angle. In theory, it is also possible to choose less than 5°, but in order to balance the comprehensive balance between the processing cost of the vibration head 33 and the increase in the surface area, 5° is the lower limit of the angle, so the inclination angle of the guide groove 331 is 5°-20°. Preferably, the inclination angle of the guide groove 331 is 9°, Tan (9°) = 0.15838. The following application example 4 shows that when the inclination angle is greater than 9°, although the area increases, the change in particle size distribution is relatively slow, and the force Fa is large. 9° is the best combination of the force Fa and the change in the particle size of the material.

[0073] Application Example 4

[0074] The following experimental case is a dispersion material of 15% silver behenate needle powder (single crystal is 10x1 micron needle crystal), the solvent is a 15% concentration of PVA1130 aqueous solution, the dispersion time is 5 minutes, under the same conditions, the particle size when the guide groove is at the following angles:

[0075] 5° right-hand groove 9° right-hand groove 10° right-hand groove 20° right-hand groove D70 particle size distribution (micrometers) 18.2 15.1 14.9 13.3 Fa 0.08749F 0.15838F 0.17633F 0.36397F

[0076] F is the force along the axial motion of the horn; Fa is the radial component.

[0077] Preferably, the width of the guide groove 331 is 1 / 10-1 / 8 of the circumference of the vibration head 33, and the groove depth is 1 / 6-1 / 4 of the radius of the vibration head 33. Preferably, the guide groove 331 is an arc-shaped inner groove, the arc diameter of the arc-shaped inner groove is 1 / 8 of the circumference of the vibration head 33, and the groove depth is 1 / 4 of the radius of the vibration head 33, which can ensure that the area is maximized without directly changing the angle. The directly changing angle may form unnecessary sound wave reflection and diffraction in the parallel space, thereby forming an irregular vibration field inside the energy focusing cavity 1, affecting the particle size uniformity of the dispersed material.

[0078] See also Figure 4Furthermore, the energy-gathering cavity 1 is also provided with a feed port 13. Specifically, a plurality of feed ports 13 are provided, and the plurality of feed ports 13 are arranged at intervals on the lower side of the energy-gathering cavity 1. The purpose of adding the feed port 13 is to simultaneously and separately deliver a plurality of materials to be dispersed into the energy-gathering cavity 1. For example, grease enters from the through hole 4, and water enters from the feed port 13. After the grease is sprayed out through the through hole 4, it forms micron-level uniform oil droplets, which are directly sprayed into the water. This can greatly accelerate the dispersion speed. This water-oil mixed dispersion is then pushed upward by the bottom horn 3 to collide with the upper dispersion head to further reduce the oil droplet particles, and a nano-level dispersion effect can be quickly achieved.

[0079] Another purpose of setting multiple feed ports 13 is to facilitate the ultrasonic dispersion structure to continue to enter the next ultrasonic dispersion structure, the pre-dispersed material enters from the through hole 4, and the other feed ports 13 convey the second material to be dispersed, so as to achieve mixed dispersion of the three materials and increase the application scenarios of the structure. In actual use, solid materials or materials that need to be pre-dispersed can be introduced into the energy-gathering cavity 1 from the through hole 4 according to actual conditions, and liquids can enter the energy-gathering cavity 1 from the feed port 13.

[0080] A dispersion device comprises a plurality of ultrasonic dispersion structures, wherein the plurality of ultrasonic dispersion structures are sequentially connected in series, in parallel or in mixed connection.

[0081] See also Figure 6 , several ultrasonic dispersion structures are connected in series in sequence. Specifically, the cavity 11 of the first ultrasonic dispersion structure is connected to the output port of the external delivery pump 5, the discharge port 12 of the first ultrasonic dispersion structure is connected to the cavity 11 of the next ultrasonic dispersion structure, and so on, the discharge port 12 of the last ultrasonic dispersion structure is connected to the material collection device 6. Preferably, the vibration frequency and power of the transducer 21 of each ultrasonic dispersion structure are the same or different according to the actual application, the ultrasonic dispersion structure is connected in series, the material is dispersed in multiple stages, and the dispersion effect is uniform.

[0082] See also Figure 7 , several ultrasonic dispersion structures are connected in parallel in sequence. Specifically, the cavity 11 of each ultrasonic dispersion structure is connected to the output port of the external delivery pump 5, and the discharge port 12 of each ultrasonic dispersion structure is connected to the material collection structure 6. Preferably, the vibration frequency and power of each ultrasonic dispersion structure transducer 21 are the same, and this structure is adopted to increase the processing volume per unit time and improve efficiency.

[0083] See also Figure 8, several ultrasonic dispersion structures are mixed in series. Specifically, multiple groups of ultrasonic dispersion structures are provided, each group of ultrasonic dispersion structures is provided with several ultrasonic dispersion structures connected in series, and the groups are connected in parallel to form a mixed series. This structure not only increases the processing volume per unit time and improves efficiency, but also has a uniform dispersion effect after multi-stage dispersion.

[0084] The ultrasonic dispersion structure and dispersion device of the present invention has an energy-gathering cavity 1 provided with a cavity 11, and a coaxial through hole 4 is provided for the transducer 2 and the horn 3. The through hole 4 is connected with the cavity 11, and the material enters the cavity 11 through the through hole 4. When the material to be dispersed is transported and flows in the through hole 4, the material is subjected to the effect of vibration, which not only has a pre-dispersion effect on the material, but also the adhesion of the material to the inner wall of the through hole 4 is basically eliminated, and the material will not adhere to the inner wall of the through hole, thereby stabilizing the conveying capacity and improving the dispersion effect. An inner groove 41 is provided in the through hole 4 to gather and eject the material, increase the outlet pressure of the material, further increase the outlet speed of the material, and improve the dispersion efficiency and uniformity of the material. A guide groove 331 is provided in the vibration head 33, and the contact area with the material is increased by the parameters such as the inclination angle, groove width, groove depth and number of grooves of the guide groove 331. A larger contact area can bring more upward moving energy transmission, thereby improving the dispersion effect of the material. By using the first ultrasonic transducer 21 and the second ultrasonic transducer 22 with different frequencies, the collision speed of the material reaches twice that of a single horn, and the combination of two ultrasonic waves with different frequencies avoids the formation of a non-vibrating standing wave area in the energy-gathering cavity 1, accelerates the collision dispersion, and the dispersion effect is uniform. After a number of ultrasonic dispersion structures are connected in series, parallel or mixed, the dispersion effect and dispersion efficiency are improved.

[0085] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the scope of the present invention should be included in the protection scope of the present invention.

Claims

1. An ultrasonic dispersion structure, characterized in that: include: Energy-gathering cavity (1); provided with a cavity (11) A transducer (2) connected to the energy focusing cavity (1); as well as A horn (3) is connected to the transducer (2), and the horn (3) is arranged in the energy focusing cavity (1); At least one set of variable amplitude rods (3) is arranged at one end of the energy focusing cavity (1) through the transducer (2); the transducer (2) and the variable amplitude rod (3) are provided with a coaxial through hole (4); the through hole (4) is connected to the cavity (11); and the material enters the cavity (11) through the through hole (4).

2. The ultrasonic dispersion structure according to claim 1, characterized in that: The diameter of the through hole (4) is 3-5 mm.

3. The ultrasonic dispersion structure according to claim 1 or 2, characterized in that: An inner groove (41) is provided at an opening of one end of the through hole (4) away from the transducer (2).

4. The ultrasonic dispersion structure according to claim 3, characterized in that: The inner groove (41) is in an arc shape, and its diameter is less than 3 mm.

5. The ultrasonic dispersing structure according to claim 1, 2 or 4, characterized in that: The end of the energy-gathering cavity (1) is in the shape of a trumpet, which gradually becomes smaller from the end toward the inside of the energy-gathering cavity (1), and the amplitude-changing rod (3) is provided with an outer shape matching the trumpet shape.

6. The ultrasonic wave dispersing structure according to claim 1, 2 or 4, characterized in that: The horn (3) is connected to the energy-gathering cavity (1) via a sealing gasket (34).

7. The ultrasonic wave dispersing structure according to claim 5, characterized in that: The horn (3) is connected to the energy-gathering cavity (1) via a sealing gasket (34).

8. The ultrasonic dispersing structure according to claim 1, 2, 4 or 7, characterized in that: The transducer (2) is provided with a first transducer (21) and a second transducer (22); the first amplitude rod (31) is installed at one end of the energy focusing cavity (1) through the first transducer (21); and the second amplitude rod (32) is installed at the other end of the energy focusing cavity (1) through the second transducer (22).

9. The ultrasonic wave dispersing structure according to claim 8, characterized in that: The vibration frequency of the first transducer (21) is inconsistent with the vibration frequency of the second transducer (22).

10. The ultrasonic dispersing structure according to claim 1, 2, 4, 7 or 9, characterized in that: The horn (3) is provided with a vibration head (33) mounted on its front end, and the vibration head (33) is provided with a guide groove (331) along its axial outer side surface.

11. The ultrasonic dispersing structure according to claim 10, characterized in that: The guide groove (331) is an inclined groove, and the guide groove (331) has an inclination angle of 5°-20°.

12. The ultrasonic dispersing structure according to claim 1, 2, 4, 7, 9 or 11, characterized in that: A feed port (13) is also provided on the side of the energy-gathering cavity (1).

13. A dispersion device, comprising a plurality of ultrasonic dispersion structures according to any one of claims 1 to 12, wherein the plurality of ultrasonic dispersion structures are sequentially connected in series, in parallel or in mixed connection.

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