CN114289397B - Acoustic reflection top cover structure for ultrasonic cleaning device - Google Patents
Acoustic reflection top cover structure for ultrasonic cleaning device Download PDFInfo
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- CN114289397B CN114289397B CN202111507827.8A CN202111507827A CN114289397B CN 114289397 B CN114289397 B CN 114289397B CN 202111507827 A CN202111507827 A CN 202111507827A CN 114289397 B CN114289397 B CN 114289397B
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Abstract
The invention discloses an acoustic reflection top cover structure for an ultrasonic cleaning device, and relates to the technical field of ultrasonic cleaning. On the basis of not changing the structure of the traditional ultrasonic cleaning device, the top cover is additionally arranged, so that the acoustic energy dissipation caused by tension waves and atomization effects of exciting a gas-liquid interface can be effectively reduced. The ultrasonic wave diffuse reflection device comprises an acoustic reflection top cover and a two-dimensional motion platform, wherein the bottom surface of the acoustic reflection top cover is a plane or is provided with a microstructure for enhancing ultrasonic wave diffuse reflection; the acoustic reflection top cover is driven by the two-dimensional motion platform and is placed into the cleaning liquid of the cleaning tank. The top cover has simple structure and convenient installation, and can conveniently and effectively improve the cleaning efficiency of the large ultrasonic cleaning device.
Description
Technical Field
The invention relates to the technical field of ultrasonic cleaning, in particular to an acoustic reflection top cover structure for an ultrasonic cleaning device.
Background
Ultrasonic cleaning technology was first developed in the 30 s of the 20 th century, and extensive research and application thereof was never discontinued after that. Ultrasonic cleaning has only been a few decades old, but its superior performance and economy are fully demonstrated. Ultrasonic cleaning is rapidly becoming an integral part of a variety of industries and a variety of product manufacturing processes.
The existing large-sized ultrasonic cleaning devices commonly used in industry are mostly open without a top cover so as to facilitate the automatic transportation of cleaning objects, and few large-sized ultrasonic cleaning devices provided with protective top covers mostly consider the harm of aerogel and sputtering phenomena caused by ultrasonic wave propagation in cleaning liquid to operators, but the acoustic energy dissipation caused by surface tension waves and atomization effect exists at the gas-liquid interface.
Disclosure of Invention
The invention aims at the problems and provides the sound reflection top cover structure for the ultrasonic cleaning device, which can effectively reduce the sound energy dissipation caused by the tension wave and atomization effect of the excited gas-liquid interface by additionally arranging the top cover on the basis of not changing the structure of the traditional ultrasonic cleaning device, has simple structure and convenient installation, can conveniently and effectively improve the cleaning efficiency of the ultrasonic cleaning device and obtain more uniform cleaning effect.
The technical scheme of the invention is as follows: the sound reflection top cover structure comprises a sound reflection top cover 1 and a two-dimensional motion platform, wherein a suspension point 2 is arranged on the sound reflection top cover 1, and the bottom surface of the sound reflection top cover 1 is a plane or is provided with a microstructure for enhancing diffuse reflection of ultrasonic waves; the two-dimensional motion platform is connected with the hanging point 2, drives the acoustic reflection top cover 1 to reciprocate along the X direction and the Z direction through the two-dimensional motion platform, and places the acoustic reflection top cover into cleaning liquid in the cleaning tank. Therefore, a sound field boundary is formed by the top cover, the occurrence area of the ultrasonic cavitation effect is limited, the vertical distance between the sound field boundary and the transducer radiation surface of the ultrasonic cleaning device is the sound field distance, the sound field distance can be adjusted along with the up-and-down movement of the acoustic reflection top cover, and the adjusting range is from the top of the carrier basket to the surface of the cleaning liquid.
The sound reflection top cover 1 is made of metal or polymer material.
The microstructure is in a plane, a periodical concave surface, a periodical convex surface or a large-curvature miniature periodical concave surface shape.
As shown in fig. 2a and 2b, when the microstructure is periodically convex or concave, it is formed by a plurality of reflective ribs or reflective grooves uniformly distributed on the bottom surface of the acoustic reflection top cover, so that the acoustic energy can be diffusely reflected into the cleaning solution.
When the microstructure is in the shape of a large-curvature miniature periodical concave surface, as shown in fig. 3-4, the microstructure is formed by a plurality of arc-shaped reflecting pits uniformly distributed on the bottom surface of the acoustic reflection top cover, and the pits are part of a large-curvature spherical surface (preferably, the radius of the large-curvature spherical surface is equal to the liquid level of the cleaning liquid), so that acoustic energy can be focused on a plane where the spherical center is located at a far position. In this way, by means of the microstructures with different forms, the surface tension wave formed by ultrasonic waves through liquid to the gas-liquid interface can be further reduced, and the dissipation of sound energy when the vibration of the driving interface generates atomization effect can be better reduced.
The two-dimensional motion platform comprises a Z-direction driving mechanism fixedly connected to a frame and an X-direction driving mechanism connected with a suspension point 2, wherein the Z-direction driving mechanism and the X-direction driving mechanism are linear driving mechanisms such as a hydraulic cylinder, an air cylinder or an electric push rod, and the like, the linear driving mechanisms are provided with fixing parts and movable parts such as a cylinder body, a cylinder rod, a piston cylinder, a piston rod, a base and a screw rod, the fixing parts of the Z-direction driving mechanism are fixedly connected to the frame, the fixing parts of the X-direction driving mechanism are fixedly connected to the movable parts of the Z-direction driving mechanism, and the movable parts of the X-direction driving mechanism are fixedly connected with the suspension point 2 on the acoustic reflection top cover 1. Thus, the two-dimensional motion platform is rigidly connected with the sound reflection top cover, and is not easy to shake. And after the two-dimensional motion platform is connected with the sound reflection top cover, the sound reflection top cover can be controlled to move back and forth along the X direction or move up and down along the Z direction. The sound reflection top cover is firstly remained on the ground outside the cleaning dish, and after waiting for the object carrying basket loaded with objects to be cleaned to be placed in the cleaning dish, the sound reflection top cover moves forwards to the upper part of the cleaning dish and moves downwards to dip into the liquid level of the cleaning liquid.
The ultrasonic cleaning device comprises a cleaning dish 6, a carrying basket 5 and a hanging rope 4, wherein one end of the hanging rope 4 is fixedly connected to a frame above the cleaning dish 6, the other end of the hanging rope is fixedly connected with the carrying basket 5, and the carrying basket 5 is suspended in the cleaning dish 6 through the hanging rope 4;
the sound reflection top cover 1 is also provided with a reserved gap 3 arranged along the X direction, and the width of the reserved gap 3 is larger than the outer diameter of the hanging rope;
the hanging rope 4 has a plurality of hanging ropes which are positioned on two XZ planes, the reserved gaps 3 also have two, and the centers of the two reserved gaps 3 are respectively positioned in the two XZ planes. Therefore, when the acoustic reflection top cover moves in the X direction or the Z direction, the acoustic reflection top cover and the hanging rope are prevented from generating movement interference.
The working principle of the invention is as follows:
the ultrasonic transducer at the bottom surface of the large-scale ultrasonic cleaning device works in an ultrasonic frequency range, so that generated ultrasonic waves propagate in the cleaning liquid to cause cavitation effect;
the acoustic reflection top plate acoustic impedance and the cleaning liquid acoustic impedance have huge differences, a hard sound field boundary is formed at the junction, ultrasonic reflection is enhanced, and acoustic energy dissipation caused by tension waves and atomization effects of exciting a gas-liquid interface is effectively reduced.
In addition, through adjusting the distance of acoustic reflection top cap and washware bottom surface, realize the intensive position of cavitation bubble and reciprocate to evenly and high-efficient washing is waited to wash the object.
Before working, firstly, the sound reflection top cover is stopped above the ground outside the cleaning dish and is positioned on a plane higher than the top of the cleaning dish, and after the object carrying basket loaded with objects to be cleaned is placed in the cleaning dish, the object carrying basket moves forwards to the upper part of the cleaning dish and is immersed into the liquid level of the cleaning liquid downwards. At this time, the ultrasonic transducer works, the acoustic reflection cover plate reciprocates periodically and moves up and down, so that efficient and uniform cleaning is realized.
The invention improves the cleaning efficiency by utilizing ultrasonic reflection, and has the advantages that the structure of a large ultrasonic cleaning device is not required to be changed, and the acoustic energy loss caused by surface tension waves and atomization effect at the gas-liquid interface is reduced and the sound field intensity in the cleaning liquid is increased only by additionally arranging the acoustic reflection top cover. Through carrying out the micro-structural design to the top cap bottom, can strengthen ultrasonic wave diffuse reflection, obtain the higher filth removal efficiency and the more even cleaning effect of than the ultrasonic cleaning device who does not add the commentaries on classics top cap. The top cover has simple structure and convenient installation, and can conveniently and effectively improve the cleaning efficiency of the large ultrasonic cleaning device. Furthermore, the installation top cover is applicable to various ultrasonic cleaning devices, and has strong applicability and reliability. Particularly, in the invention, the distance between the top cover and the bottom of the cleaning dish is adjustable, so that the waste of acoustic energy caused by standing wave phenomenon can be effectively avoided for different working frequencies.
Drawings
FIG. 1 is a schematic structural diagram of the present case;
FIG. 2a is a schematic diagram of the microstructure with periodic convexities;
FIG. 2b is a schematic diagram of the microstructure with periodic concave shape;
FIG. 3 is a schematic view of the microstructure in the present case with a large curvature and a periodic concave shape;
FIG. 4 is a schematic diagram of the structure of the reflective pit in the present case;
in the figure, the top cover is 1-sound reflection, the hanging point is 2-sound reflection, the reserved gap is 3-sound reflection, the hanging rope is 4-sound reflection, the carrying basket is 5-sound reflection and the cleaning dish is 6-sound reflection.
Detailed Description
In order to clearly illustrate the technical features of the present patent, the following detailed description will make reference to the accompanying drawings.
As shown in fig. 1, the ultrasonic cleaning apparatus employed in the present embodiment includes: an acoustic reflection top cover 1 for reflecting ultrasonic waves; the two-dimensional motion platform is used for connecting the acoustic reflection top cover to realize the front-back motion in the X direction and the up-down motion in the Z direction; a gap 3 is reserved, so that a lifting rope can pass through conveniently; a lifting rope 4 for hanging the basket; a basket 5 for loading an object to be cleaned; the cleaning vessel 6 contains therein a cleaning liquid such as ultrapure water or the like.
As shown in fig. 1, the acoustic reflection top cover 1 is used for reflecting ultrasonic waves to form a sound field boundary and limit an occurrence area of an ultrasonic cavitation effect. The bottom space of the rest cleaning dishes 6 is the sound field distance, the sound field distance is adjustable, and the adjusting range is from the top of the carrying basket to the surface of the cleaning liquid.
As shown in fig. 1, the acoustic reflection top cover is provided with two reserved gaps 3, and the reserved gaps are matched with the hanging rope positions of the carrying basket. When the sound reflection top cover moves, the sound reflection top cover is not contacted with the hanging rope and the carrying basket, and the hanging rope and the carrying basket are not caused to shake.
Before working, the acoustic reflection top cover 1 is firstly stopped above the ground outside the cleaning dish 6 and is positioned on a plane higher than the top of the cleaning dish 6. After waiting to load the basket 5 of the object to be cleaned, lowering into the cleaning vessel through the lifting rope 4, the sound reflection top cover 1 moves forward to the upper part of the cleaning vessel under the action of the two-dimensional moving platform 2, and is immersed into the liquid level of the cleaning liquid.
Further, after the acoustic reflection top cover is immersed in the liquid level of the cleaning liquid, the ultrasonic transducer at the bottom surface of the large-sized ultrasonic cleaning device works in an ultrasonic frequency range, and thus generated ultrasonic waves propagate in the cleaning liquid to cause cavitation effect.
Further, as shown in fig. 1, the acoustic reflection top cover 1 reciprocates downward and upward in the Z direction under the action of the two-dimensional motion platform 2. So that the hollow bubble-dense position of the cleaning liquid can be moved up and down to uniformly and efficiently clean the whole area of the object to be cleaned.
Embodiment case 1:
the experimental operating environment was 201 ℃, and the ultrasonic transducer operating frequency f=65.0 KHz. The object to be cleaned is a metal part, and the surface of the part is provided with stubborn dirt such as engine oil and the like. And selecting an ultrasonic reflection cover made of metal, selecting a concave tooth sound focusing structure on the lower surface of the reflection cover, and applying ultrasonic waves to carry out ultrasonic cleaning. Compared with a control group which is not provided with an ultrasonic reflection cover and has the same power with the same cleaning time, the cleaning efficiency is improved by 37.3 percent.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: on the basis of not changing the structure of the existing ultrasonic cleaning device, the top cover is additionally arranged, so that the acoustic energy dissipation caused by surface tension waves and atomization effect can be effectively reduced, the structure is simple, the safety and the rotation are convenient, the cleaning efficiency of the ultrasonic cleaning device can be conveniently and effectively improved, and a more uniform cleaning effect is obtained; the acoustic reflection top cover is applicable to various ultrasonic cleaning devices, and has strong applicability and reliability; in addition, the distance between the top cover and the bottom of the cleaning dish is adjustable, and the acoustic energy waste caused by the standing wave phenomenon can be effectively avoided for different working frequencies.
The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and to implement the same, but are not intended to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.
Claims (4)
1. The sound reflection top cover structure for the ultrasonic cleaning device is characterized by comprising a sound reflection top cover (1) and a two-dimensional motion platform, wherein a suspension point (2) is arranged on the sound reflection top cover (1), and a microstructure for enhancing diffuse reflection of ultrasonic waves is arranged on the bottom surface of the sound reflection top cover (1); the two-dimensional motion platform is connected with the suspension point (2), and drives the acoustic reflection top cover (1) to reciprocate along the X direction and the Z direction through the two-dimensional motion platform;
the ultrasonic cleaning device comprises a cleaning dish (6), a carrying basket (5) and a hanging rope (4), one end of the hanging rope (4) is fixedly connected to a frame above the cleaning dish (6), the other end of the hanging rope is fixedly connected with the carrying basket (5), and the carrying basket (5) is suspended in the cleaning dish (6) through the hanging rope (4);
a reserved gap (3) arranged along the X direction is further formed in the sound reflection top cover (1), and the width of the reserved gap (3) is larger than the outer diameter of the hanging rope;
the hanging rope (4) is provided with a plurality of hanging ropes, the hanging ropes are positioned on two XZ planes, the reserved gaps (3) are also provided with two, and the centers of the two reserved gaps (3) are respectively positioned in the two XZ planes.
2. An acoustic reflection top cover structure for an ultrasonic cleaning device according to claim 1, characterized in that the acoustic reflection top cover (1) is made of metal or polymer material.
3. The structure of claim 2, wherein the microstructure is planar, periodic concave, periodic convex, or large curvature micro periodic concave.
4. The structure of an acoustic reflection top cover for an ultrasonic cleaning device according to claim 1, 2 or 3, wherein the two-dimensional motion platform comprises a Z-direction driving mechanism fixedly connected to the frame and an X-direction driving mechanism connected to the suspension point (2), the Z-direction driving mechanism and the X-direction driving mechanism are both linear driving mechanisms, a fixing portion of the Z-direction driving mechanism is fixedly connected to the frame, a fixing portion of the X-direction driving mechanism is fixedly connected to a movable portion of the Z-direction driving mechanism, and the movable portion of the X-direction driving mechanism is fixedly connected to the suspension point (2) on the acoustic reflection top cover (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111507827.8A CN114289397B (en) | 2021-12-10 | 2021-12-10 | Acoustic reflection top cover structure for ultrasonic cleaning device |
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| CN202111507827.8A CN114289397B (en) | 2021-12-10 | 2021-12-10 | Acoustic reflection top cover structure for ultrasonic cleaning device |
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| CN114289397A CN114289397A (en) | 2022-04-08 |
| CN114289397B true CN114289397B (en) | 2023-04-25 |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4316734B2 (en) * | 1999-07-07 | 2009-08-19 | 島田理化工業株式会社 | Ultrasonic cleaning method for objects to be cleaned with a specific gravity smaller than that of the cleaning liquid |
| CN107899526B (en) * | 2017-11-07 | 2020-02-07 | 中国石油大学(华东) | Sonochemistry processing device for weakening standing wave effect based on reflecting plate topological structure |
| CN210788422U (en) * | 2019-09-25 | 2020-06-19 | 河南日盛综合检测有限公司 | Ultrasonic cleaner |
| CN211660612U (en) * | 2019-10-30 | 2020-10-13 | 南京工业职业技术学院 | Cleaning device for complex modeling art ceramics |
| CN112605053A (en) * | 2020-12-16 | 2021-04-06 | 鼎泰（湖北）生化科技设备制造有限公司 | Novel ultrasonic cleaning machine |
| CN214767448U (en) * | 2021-07-12 | 2021-11-19 | 苏州泽恒机械设备有限公司 | Ultrasonic cleaning device for medical treatment |
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