Ultrasonic crushing device

Abstract

The utility model provides an ultrasonic crushing device, which belongs to the technical field of ultrasonic crushing, and comprises a container, the ultrasonic generation module comprises a vibration rod, and the vibration rod is inserted into the container; the vibrating rod can generate ultrasonic waves in the container and emit cavitation bubbles to the periphery by taking the vibrating rod as the center through the ultrasonic waves, a standing wave field can be formed in the container, and the cavitation bubbles in the container are gathered towards the node position of the standing wave field under the polymerization action of the standing wave field to form a cavitation bubble dense group; the device has the beneficial effects that a standing wave field is ingeniously formed in the container, cavitation bubbles are densely gathered at the node position of the standing wave field to form a cavitation bubble dense group, and the density of the cavitation bubbles in a local space is improved, so that the cavitation effect is more concentrated, and the crushing capacity to a target substance is greatly enhanced.

Description

Technical Field

[0001] The utility model belongs to the technical field of ultrasonic crushing, and relates to an ultrasonic crushing device. Background Art

[0002] An ultrasonic crushing device is a device that uses the cavitation effect of ultrasonic waves in a liquid medium to crush, extract, and emulsify various substances, and is widely used in the fields of molecular biology, biochemistry, pharmaceutical industry, nanotechnology, and materials science.

[0003] The working principle of the ultrasonic crushing device is as follows: When ultrasonic waves propagate in a liquid, tiny cavitation bubbles (air bubbles) can be generated inside the liquid medium. When these cavitation bubbles are compressed, they collapse rapidly, releasing huge energy, forming microjets and high temperature and high pressure, thereby destroying nearby particles or cells.

[0004] Ultrasonic crushing has a very wide application prospect in the fields of cell disruption, traditional Chinese medicine extraction, nanomaterial crushing (dispersion), etc. However, in actual applications, it is found that the intensity of ultrasonic waves is not strong enough: the cell disruption ability is limited, and the crushing rates of yeast, ganoderma spore powder, etc. are very low; the crushing level of nanomaterials is not enough, and the efficiency is low. For example, when crushing graphite powder, it is difficult to reach below 5 microns; when exfoliating worm graphite into graphene, the efficiency is insufficient and it is difficult to achieve large-scale production; it is difficult to crush photochromic pigments to within 10 microns, etc. Thus, the industrial application of ultrasonic waves is greatly restricted.

[0005] Currently, the intensity of ultrasonic waves is mainly limited by the strength of titanium alloy materials. Therefore, the inherent intensity of ultrasonic waves cannot be broken through, resulting in that the ultrasonic crushing device cannot reach the required crushing level when facing such materials as mentioned above, thereby restricting its application range. Summary of the Utility Model

[0006] The purpose of the present utility model is to provide an ultrasonic crushing device in view of the above problems existing in the prior art.

[0007] The purpose of the present utility model can be achieved by the following technical solutions: An ultrasonic crushing device, comprising:

[0008] A container;

[0009] An ultrasonic generating module, the ultrasonic generating module includes a vibrating rod, and the vibrating rod is inserted into the container;

[0010] The vibrating rod can generate ultrasonic waves in the container and emit cavitation bubbles around itself through the ultrasonic waves. A standing wave field can be formed in the container, and the cavitation bubbles in the container gather towards the node position of the standing wave field under the aggregation effect of the standing wave field to form a dense group of cavitation bubbles.

[0011] Preferably, the vibrator is configured to be able to cause the container to resonate through the medium within the container, or the vibrator is configured to be able to cause the container to resonate by contacting the container; a standing wave field is generated when the container resonates.

[0012] Preferably, the vibrator is eccentrically arranged with respect to the central axis inside the container.

[0013] Preferably, the vibrator is close to the inner wall surface of the container.

[0014] Preferably, the ultrasonic generating module is provided with a first flange, and the port of the container is provided with a second flange. The first flange and the second flange are connected, and the ultrasonic generating module cooperates with the first flange to seal the opening of the container so as to form a closed space inside the container.

[0015] Preferably, the container is a round tank.

[0016] Preferably, the container is configured to be able to vibrate actively to generate the standing wave field.

[0017] Preferably, a vibration element is installed on the outer wall of the container, and the container can vibrate actively through the vibration element.

[0018] Preferably, when the container vibrates, an incident wave is generated inside the container. After passing through the inner wall surface of the container, the incident wave forms a reflected wave, and the incident wave and the reflected wave are superimposed to form the standing wave field.

[0019] Preferably, the dense group of cavitation bubbles is distributed on several longitudinal planes inside the container.

[0020] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0021] 1. The device cleverly forms a standing wave field inside the container. The cavitation bubbles densely gather at the node positions of the standing wave field, forming a dense group of cavitation bubbles, which improves the density of cavitation bubbles in the local space. This makes the cavitation effect more concentrated and greatly enhances the crushing ability of the target substance.

[0022] 2. Although the dense group of cavitation bubbles is concentrated in the node area, the liquid medium inside the entire container continuously tumbles due to the disturbance of ultrasonic waves, ensuring that all substances to be crushed have the opportunity to contact the high-density cavitation bubbles. In this way, even if the distribution of cavitation bubbles is uneven, the substances inside the entire container can still obtain an equal crushing effect.

[0023] 3. The principle of the first embodiment is similar to that of a "fish washer", that is, a vibration source (here it is a vibrating rod) is used to excite the resonance of the container, and then a standing wave field is formed. Specifically, the vibration of the vibrating rod provides a periodic external force for the container. This external force forces the container to start vibrating, and the frequency of this vibration will quickly change to the natural frequency of the container, causing the vibration amplitude of the container to increase significantly, that is, the container enters the resonance state. The vibration of the container propagates in the liquid medium to form a series of waves. When these waves meet the waves reflected from the container wall, they are superimposed to form a standing wave, thus forming a standing wave field in the container.

[0024] 4. When the vibrating rod is placed eccentrically, it is closer to the container wall, which means that the mechanical vibration of the vibrating rod can be more effectively transmitted to the container wall, making it easier to excite the resonance of the container.

[0025] 5. Whether in the first embodiment or the second embodiment, the standing wave field is formed by the vibration of the container because the standing wave formed when the container vibrates is strong enough to gather the cavitation bubbles in the liquid medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the state where the cavitation bubbles of the present invention gather to form a dense cluster of cavitation bubbles under the action of the standing wave field.

[0027] Figure 2 It is a schematic diagram of the cavitation bubble distribution of the existing ultrasonic crushing device.

[0028] Figure 3 It is a schematic structural diagram of the first embodiment of the present invention.

[0029] Figure 4 It is a schematic structural diagram of the second embodiment of the present invention.

[0030] Figure 5 It is a schematic cross-sectional view of the first embodiment of the present invention.

[0031] Figure 6 It is an axonometric view of the first embodiment of the present invention.

[0032] In the figure, 100, container; 110, vibration element; 120, second flange; 200, ultrasonic generating module; 210, vibrating rod; 220, first flange. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The following are specific embodiments of the present invention in combination with the drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0034] As Figure 1 、 Figures 3-6As shown in the figure, an ultrasonic crushing device includes: a container 100; an ultrasonic generating module 200, which includes a vibration rod 210 inserted into the container 100; the vibration rod 210 can generate ultrasonic waves in the container 100 and emit cavitation bubbles around itself by means of ultrasonic waves, a standing wave field can be formed in the container 100, and the cavitation bubbles in the container 100 gather towards the node positions of the standing wave field under the aggregation effect of the standing wave field to form a dense group of cavitation bubbles.

[0035] The ultrasonic generating module 200, namely an ultrasonic transducer or an immersion ultrasonic device, belongs to existing ultrasonic components, and it can emit ultrasonic waves in all directions through the vibration rod 210; the vibration rod 210 is put into the container 100, and there is a liquid medium in the container 100; when the vibration rod 210 vibrates, it can emit ultrasonic waves, and when the ultrasonic waves propagate in the liquid, a cavitation effect will be generated, that is, the ultrasonic waves will generate tiny vacuum bubbles (cavitation bubbles) inside the liquid. When these cavitation bubbles are compressed, they will quickly collapse, releasing huge energy, forming microjets and high temperature and high pressure, thereby destroying nearby cells or particles. Therefore, increasing the density of cavitation bubbles can greatly enhance the crushing effect without increasing the power of the ultrasonic generating module 200.

[0036] A standing wave is a special wave phenomenon. It refers to two waves with the same frequency and amplitude, propagating in opposite directions along the same path. Under certain specific conditions, they are superimposed to form a special waveform. This waveform looks like it is stationary, but in fact it is caused by the mutual interference of the two waves. In a standing wave, some points are always at the maximum amplitude, called antinodes, while some other points are always at zero amplitude, called nodes.

[0037] A relatively obvious example of a standing wave is that when fine particles (such as sand) are evenly sprinkled on a vibrating platform, when the platform vibrates at a specific frequency, the particles will arrange in the pattern of a standing wave. The essential principle is that the antinode positions on the platform vibrate violently, thereby gathering the particles to the node positions, making the particles on the plane gather into a special pattern, which is the aggregation effect of the standing wave.

[0038] This device forms a standing wave field inside the container 100 through vibration. The vibration rod 210 continuously emits cavitation bubbles towards the surroundings. There is a standing wave field inside the container 100 (inside the liquid medium). Under the action of the standing wave field, a large number of cavitation bubbles are gathered to certain positions (node positions) to form a dense cluster of cavitation bubbles, increasing the density of cavitation bubbles in the local space. This makes the cavitation effect more concentrated and greatly enhances the crushing ability on the target substance. More specifically, in the standing wave field, there are some points with relatively high energy (antinodes), while the energy of some other points is relatively low (nodes). Cavitation bubbles tend to gather at the nodes and then form a dense cluster of cavitation bubbles. The substance to be crushed is in the liquid medium. As the liquid tumbles, they will be carried to the area where the dense cluster of cavitation bubbles is located. When the cavitation bubbles gather and collapse at the nodes, the energy released generates a strong mechanical shear force and thermal effect on the nearby material particles, causing these particles to break into smaller particles. That is, this device finds a new way to aggregate the cavitation bubbles of ultrasonic waves through external force, thereby increasing the ultrasonic intensity and breaking through the intensity limitation of ultrasonic waves itself.

[0039] It should be noted here that although the dense cluster of cavitation bubbles is concentrated in the node region, the liquid medium inside the entire container 100 keeps tumbling due to the perturbation of ultrasonic waves, ensuring that all substances to be crushed have the opportunity to contact the high-density cavitation bubbles. In this way, even if the distribution of cavitation bubbles is uneven, the substances inside the entire container 100 can still obtain an equal crushing effect.

[0040] Example 1:

[0041] Such as Figure 1 、 Figure 3 、 Figure 5 、 Figure 6 As shown, the vibration rod 210 is set to be able to make the container 100 resonate through the medium inside the container 100, or the vibration rod 210 is set to be able to make the container 100 resonate by contacting the container 100; a standing wave field is generated when the container 100 resonates.

[0042] The principle of this embodiment is similar to that of a "fish washing bowl", that is, a standing wave field is formed by exciting the resonance of the container 100 through a vibration source (here it is the vibration rod 210). Specifically, the vibration of the vibration rod 210 provides a periodic external force for the container 100. This external force forces the container 100 to start vibrating, and the frequency of this vibration will quickly change to the natural frequency of the container 100, making the vibration amplitude of the container 100 increase significantly, that is, the container 100 enters the resonance state. The vibration of the container 100 propagates in the liquid medium to form a series of waves. When these waves meet the waves reflected from the wall of the container 100 and are superimposed to form a standing wave, a standing wave field is formed inside the container 100.

[0043] It should be noted that only the standing wave field formed by the vibration (resonance or self-initiated vibration) of the container 100 can effectively cause the cavitation bubbles in the liquid medium to aggregate and form a dense cluster of cavitation bubbles, which greatly improves the efficiency of ultrasonic treatment, such as in processes like crushing, dispersion, emulsification, etc. By controlling the frequency and power of the vibrating rod 210, the formation of the standing wave field can be precisely controlled, thereby achieving fine control of the treatment process and improving the accuracy and consistency of the process.

[0044] In this embodiment, the container 100 can be made to resonate through the liquid medium, and the ultrasonic waves generated by the vibrating rod 210 propagate through the medium (usually a liquid) inside the container 100, and the vibration of the medium further stimulates the vibration of the container 100 wall. When the frequency of the vibrating rod 210 matches the natural frequency of the container 100, the container 100 will resonate, thereby forming a stable standing wave field inside the container 100. It is also possible to directly contact the vibrating rod 210 with the container 100 to cause the container 100 to resonate. The vibrating rod 210 directly contacts the container 100 wall, and the resonance of the container 100 is excited through mechanical vibration. This method can more directly transfer the vibration energy to the container 100, making the vibration of the container 100 wall synchronous with the vibration of the vibrating rod 210, and a standing wave field can also be formed.

[0045] In the first embodiment, the vibrating rod 210 is eccentrically arranged with respect to the central axis inside the container 100.

[0046] When the vibrating rod 210 is eccentrically placed, it is closer to the container 100 wall, which means that the mechanical vibration of the vibrating rod 210 can be more effectively transmitted to the container 100 wall, thus making it easier to excite the resonance of the container 100.

[0047] In addition, the eccentric arrangement helps to break the symmetry inside the container 100, which can promote more complex waveform and sound field distributions, thus facilitating the formation of a stable standing wave field inside the container 100. The existence of the standing wave field is crucial for enhancing the effect of ultrasonic treatment.

[0048] In summary, the eccentric arrangement of the vibrating rod 210 is a method that can effectively promote the formation of a standing wave field inside the container 100, and then cause the cavitation bubbles in the liquid medium to aggregate and form a dense cluster of cavitation bubbles.

[0049] In an actual case, taking the crushing of silver photochromic powder as an example, under the same power, when the vibrating rod 210 is located at the center of the container 100, it takes 4.5 hours to crush to 10 microns, while when the vibrating rod 210 is eccentrically arranged, it only takes 3 hours to crush to 8.3 microns, greatly reducing the crushing time required and improving the crushing effect.

[0050] Based on the above embodiments, the vibrating rod 210 is close to the inner wall surface of the container 100. When the vibrating rod 210 is in close contact with or very close to the inner wall of the container 100, the vibration energy can be more directly transmitted to the wall of the container 100, thereby more easily exciting the resonance of the container 100. This direct contact or near contact can enhance the overall vibration amplitude of the container 100, and further strengthen the formation of the standing wave field.

[0051] As Figure 5 , Figure 6 shown, based on the above embodiments, the ultrasonic generating module 200 is provided with a first flange 220, and the port of the container 100 is provided with a second flange 120. The first flange 220 and the second flange 120 are connected, and the ultrasonic generating module 200 cooperates with the first flange 220 to seal the opening of the container 100 so as to form a closed space inside the container 100. In this embodiment, the ultrasonic generating module 200 and the container 100 are connected through the first flange 220 and the second flange 120.

[0052] Based on the above embodiments, the container 100 is a round tank.

[0053] Embodiment 2:

[0054] As Figure 4 shown, the container 100 is arranged to be able to vibrate actively to generate a standing wave field.

[0055] In this embodiment, the container 100 is designed to be able to vibrate actively to generate a standing wave field. The actively vibrating container 100 can more conveniently and easily form a standing wave field.

[0056] In Embodiment 2, a vibration element 110 is installed on the outer wall of the container 100, and the container 100 can vibrate actively through the vibration element 110. The vibration element 110 is installed on the container 100, and the vibration element 110 can drive the container 100 to vibrate actively to form a standing wave field. By externally controlling the frequency of the vibration element 110, the characteristics of the standing wave field can be precisely adjusted, including the positions, intensities, and distributions of the nodes and antinodes.

[0057] The vibration element 110 is preferably a high-frequency vibrator. Compared with Embodiment 1, in Embodiment 2, the vibration is generated by directly installing the vibration element 110 on the container 100 instead of relying on the vibrating rod 210 to excite the resonance of the container 100. This enables the vibration frequency of the vibrating rod 210 to no longer be limited by the natural resonance frequency of the container 100, so the device can select a wider range of vibration frequencies. Secondly, the design of Embodiment 2 simplifies the requirements for the shape and material of the container 100 because it is no longer necessary to strictly match the frequency of the vibrating rod 210 to excite resonance.

[0058] It should be noted here that in both Embodiment 1 and Embodiment 2, the standing wave field is formed by the vibration of the container 100. This is because the standing wave formed when the container 100 vibrates is very strong enough to gather the cavitation bubbles in the liquid medium.

[0059] From a practical perspective, although the ultrasonic waves generated by the vibrating rod 210 can also form a certain standing wave in the container 100, the standing wave generated by the ultrasonic waves themselves is not sufficient to cause the cavitation bubbles to gather and form a dense group of cavitation bubbles (the standing wave strength is insufficient). It is necessary to rely on the standing wave field generated by the vibration of the container 100 to gather and form a dense group of cavitation bubbles. This is why in the existing ultrasonic crushing devices, inserting the vibrating rod 210 into the center of the tank cannot achieve the crushing effect of this device, because the tank of the existing device does not form a standing wave field through vibration, so the cavitation bubbles are dispersed and do not form a dense group of cavitation bubbles.

[0060] In Embodiment 1 or Embodiment 2, when the container 100 vibrates, an incident wave is generated in the container 100. After passing through the inner wall surface of the container 100, the incident wave forms a reflected wave, and the incident wave and the reflected wave are superimposed to form a standing wave field.

[0061] In each of the above embodiments, the dense group of cavitation bubbles is distributed on several longitudinal planes in the container 100.

[0062] As Figure 2 shown, in the existing ultrasonic crushing equipment, the cavitation bubbles are generally evenly distributed, or the cavitation bubbles are relatively sparse and not in an aggregated state.

[0063] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship and movement conditions between components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0064] In addition, in the present invention, descriptions such as "first", "second", "one", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one such feature.

[0065] In the present invention, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited.

[0066] In addition, the technical solutions between the various embodiments of the present utility model can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

Claims

1. An ultrasonic pulverizing device, characterized in that: include: Container (100); An ultrasonic wave generating module (200), the ultrasonic wave generating module (200) comprising a vibrating rod (210), the vibrating rod (210) being inserted into the container (100); The vibrating rod (210) can generate ultrasonic waves in the container (100) and emit cavitation bubbles around itself through the ultrasonic waves. A standing wave field can be formed in the container (100). Under the aggregation effect of the standing wave field, the cavitation bubbles in the container (100) gather toward the node positions of the standing wave field to form a dense group of cavitation bubbles.

2. An ultrasonic pulverizing device as claimed in claim 1, characterized in that: The vibrating rod (210) is configured to cause the container (100) to resonate through a medium in the container (100), or the vibrating rod (210) is configured to cause the container (100) to resonate by contacting the container (100); when the container (100) resonates, the standing wave field is generated.

3. An ultrasonic pulverizing device as claimed in claim 2, characterized in that: The vibrating rod (210) is disposed eccentrically with respect to the central axis inside the container (100).

4. An ultrasonic pulverizing device as claimed in claim 3, characterized in that: The vibrating rod (210) is close to the inner wall surface of the container (100).

5. An ultrasonic pulverizing device as claimed in claim 3, characterized in that: The ultrasonic generating module (200) is provided with a first flange (220), and the port of the container (100) is provided with a second flange (120), the first flange (220) and the second flange (120) are connected, and the ultrasonic generating module (200) cooperates with the first flange (220) to seal the opening of the container (100) so that a closed space is formed in the container (100).

6. An ultrasonic pulverizing device as claimed in claim 1, characterized in that: The container (100) is a round can.

7. An ultrasonic pulverizing device as claimed in claim 1, characterized in that: The container (100) is configured to be able to actively vibrate to generate the standing wave field.

8. An ultrasonic pulverizing device as claimed in claim 7, characterized in that: A vibration element (110) is installed on the outer wall of the container (100), and the container (100) can be actively vibrated through the vibration element (110).

9. An ultrasonic pulverizing device as claimed in claim 2 or 7, characterized in that: When the container (100) vibrates, an incident wave is generated in the container (100), and the incident wave forms a reflected wave after passing through the inner wall surface of the container (100), and the incident wave and the reflected wave are superimposed to form the standing wave field.

10. The ultrasonic pulverizing device according to claim 1, characterized in that: The dense clusters of cavitation bubbles are distributed on several longitudinal surfaces in the container (100).

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