CN111974289A - Array type ultrasonic disperser device - Google Patents
Array type ultrasonic disperser device Download PDFInfo
- Publication number
- CN111974289A CN111974289A CN202010588032.3A CN202010588032A CN111974289A CN 111974289 A CN111974289 A CN 111974289A CN 202010588032 A CN202010588032 A CN 202010588032A CN 111974289 A CN111974289 A CN 111974289A
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- Prior art keywords
- container
- ultrasonic
- sleeve
- amplitude transformer
- baffle
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- 230000030279 gene silencing Effects 0.000 claims abstract description 10
- 230000000903 blocking effect Effects 0.000 claims description 21
- 239000002184 metal Substances 0.000 claims description 15
- 238000007599 discharging Methods 0.000 claims description 8
- 229920000742 Cotton Polymers 0.000 claims description 7
- 230000003584 silencer Effects 0.000 claims description 5
- 230000008602 contraction Effects 0.000 claims description 3
- 238000013016 damping Methods 0.000 claims 2
- 125000006850 spacer group Chemical group 0.000 claims 1
- 239000006185 dispersion Substances 0.000 abstract description 21
- 230000000694 effects Effects 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 7
- 238000001132 ultrasonic dispersion Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 239000007788 liquid Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 3
- 230000000644 propagated effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001743 silencing effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F31/00—Mixers with shaking, oscillating, or vibrating mechanisms
- B01F31/80—Mixing by means of high-frequency vibrations above one kHz, e.g. ultrasonic vibrations
- B01F31/85—Mixing by means of high-frequency vibrations above one kHz, e.g. ultrasonic vibrations with a vibrating element inside the receptacle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/18—Use of auxiliary physical effects, e.g. ultrasonics, irradiation, for disintegrating
Abstract
The invention discloses an array type ultrasonic disperser device, which mainly comprises an ultrasonic generator, a container for loading a solution to be dispersed/mixed, an amplitude transformer, a silencing device and an ultrasonic vibrator; the side surface of the container is provided with a mounting hole for mounting the amplitude transformer. When the ultrasonic dispersion device is used, the feed port is extended, a pre-dispersion sample is poured into the container through the telescopic feed port, the required frequency and time are adjusted on the ultrasonic generator according to the required dispersion degree, the ultrasonic transducers distributed in an array mode enable ultrasonic waves to be fully transmitted in a solution through the ultrasonic vibrators and the ultrasonic amplitude transformer and interact with each other, and the dispersion effect is improved. After the ultrasonic dispersion bundle is finished, the discharge port cone is rotated, so that the dispersion materials are discharged from the lower opening. The invention also has the advantages of simple structure, convenient operation and easy implementation.
Description
Technical Field
The invention relates to the field of solution disperser devices, in particular to an array type ultrasonic disperser device.
Background
An ultrasonic disperser is a device in which the action of intense ultrasonic waves causes insoluble solids (or other liquids) in a liquid to break up into particles and mix thoroughly with the surrounding liquid to form a stable dispersion.
The ultrasonic wave is a sound wave with the frequency higher than 20KHz, has good directivity and strong penetrating power, is easy to obtain more concentrated sound energy, has long propagation distance in water, and can be used for distance measurement, speed measurement, cleaning, welding, stone breaking, sterilization, disinfection and the like. When the ultrasonic energy is high enough, the ultrasonic cavitation phenomenon is generated, namely the process that tiny bubbles (cavitation nuclei) existing in liquid vibrate, grow and continuously gather sound field energy under the action of an ultrasonic field, and when the energy reaches a certain threshold value, the cavitation bubbles collapse and close rapidly, and the process can generate a violent collision effect among particles, so that pressure of thousands to tens of thousands of atmospheric pressures is generated, and a good particle dispersion effect is achieved. The existing ultrasonic dispersion equipment is easy to generate the conditions of uneven temperature distribution and uneven dispersion degree in the working process, and the obtained dispersion effect is poor. Accordingly, further improvements and improvements are needed in the art.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an array type ultrasonic disperser device.
The purpose of the invention is realized by the following technical scheme:
the array type ultrasonic disperser device mainly comprises an ultrasonic generator, a container for loading a solution to be dispersed/mixed, an amplitude transformer, a silencing device and an ultrasonic vibrator. The side surface of the container is provided with a mounting hole for mounting the amplitude transformer. One end of the amplitude transformer is connected with the output end of the ultrasonic generator through a lead, and the other end of the amplitude transformer is inserted into the mounting hole of the container and is fixedly connected with the container. The ultrasonic vibrator is fixedly arranged on the end part of the other end of the amplitude transformer and is connected with the output end of the ultrasonic generator through the amplitude transformer and a lead. The silencer is arranged on the outer side of the container and wraps the periphery of the container.
Specifically, the top of the container is provided with a feeding hole for feeding. The feed inlet is provided with three sleeves with sequentially reduced diameters, namely a first sleeve, a second sleeve and a third sleeve. One end of the first sleeve is fixedly installed on the feeding hole, and the other end of the first sleeve is provided with a first protrusion protruding inwards. One end of the second sleeve is inserted into the first sleeve, a second bulge protruding outwards is arranged on the second sleeve, and a third bulge protruding inwards is arranged at the other end of the second sleeve. One end of the third sleeve is inserted into the second sleeve, and a fourth bulge protruding outwards is arranged on the third sleeve. The three sleeves are connected in an embedded mode, and the extension of the feeding hole is achieved through the extension and contraction among the sleeves.
Specifically, the bottom of the container is provided with a discharge hole for discharging. And the discharge port is provided with a conical cylinder, a first blocking piece and a second blocking piece. And fan-shaped notches convenient for solution to pass through are formed in the first retaining plate and the second retaining plate. The first blocking piece is arranged on the discharge port and fixedly connected with the container. The second baffle is arranged at one end of the conical cylinder and is fixedly connected with the conical cylinder. One end of the cone cylinder is installed on the discharge port and can rotate around the central shaft of the discharge port, so that the first blocking piece compresses the second blocking piece, and the fan-shaped notch in the first blocking piece and the second blocking piece is opened, closed or adjusted by rotating the cone cylinder.
As a preferable scheme of the invention, the conical cylinder is fixedly connected with a second baffle plate, and the second baffle plate is riveted with the middle part of the first baffle plate.
Further, the silencing device comprises a metal shell and silencing cotton. The metal shell is arranged outside the container and wraps the periphery of the container. The sound attenuation cotton is filled between the metal shell and the container.
As a preferred version of the invention, the horn is positioned on opposite sides of the vessel.
As a preferable scheme of the invention, the number of the variable amplitude rods is set to be two to ten groups, and the variable amplitude rods are symmetrically arranged on two opposite side surfaces of the container.
Furthermore, a gasket is arranged on the amplitude transformer. The gasket is arranged on the amplitude transformer, the inner ring of the gasket is fixedly connected with the amplitude transformer, and the side surface of the gasket is fixedly connected with the container.
As a preferable scheme of the invention, the ultrasonic generator adopts a high-power ultrasonic generator.
The working process and principle of the invention are as follows: when the ultrasonic dispersion device is used, the feed port is extended, a pre-dispersion sample is poured into the container through the telescopic feed port, the required frequency and time are adjusted on the ultrasonic generator according to the required dispersion degree, the ultrasonic converters distributed in an array mode start to work through the ultrasonic vibrators and the ultrasonic amplitude transformer, ultrasonic waves are fully propagated and interacted in a solution, the ultrasonic dispersion effect is uniformly distributed in the solution, and the dispersion effect is greatly enhanced. And after the dispersion is finished, rotating the discharge port cone to discharge the dispersion from the discharge port. The invention also has the advantages of simple structure, convenient operation and easy implementation.
Compared with the prior art, the invention also has the following advantages:
(1) the array type ultrasonic disperser device provided by the invention is formed by arranging the feeding port at the top end of the container and combining three cylinders, can stretch out and draw back when the dispersing device works, is favorable for filling and sound insulation, and prevents dispersing material loss in the working process due to the fact that the metal cover is arranged at the filling port.
(2) The array type ultrasonic disperser device provided by the invention adopts the ultrasonic amplitude transformer to be uniformly arranged on two sides of the container in an array manner, the generated ultrasonic waves have a synergistic effect and are uniformly distributed in the whole solution, and the dispersing capacity is improved; the temperature rise generated by the ultrasonic wave is uniformly distributed in the solution, so that the uneven dispersion caused by the temperature difference can be avoided.
(3) The array type ultrasonic disperser device provided by the invention adopts a mode that a discharge hole at the bottom of the container is conical, realizes discharging by rotating, improves the discharging efficiency and reduces the loss.
(4) The array type ultrasonic disperser device provided by the invention is provided with the plurality of ultrasonic amplitude-changing rods which are arranged on two sides of the container in an array manner, and can well solve the phenomena of uneven temperature and uneven regional dispersion in the dispersion process of dispersed materials caused by a single ultrasonic amplitude-changing rod by utilizing the synergistic effect of sound waves.
Drawings
Fig. 1 is a schematic structural diagram of an array type ultrasonic disperser apparatus provided by the present invention.
Fig. 2 is a perspective view of the array type ultrasonic disperser apparatus provided by the present invention.
Fig. 3 is a cross-sectional view of a horn provided by the present invention.
Fig. 4 is a schematic view of the container and the interior structure provided by the present invention.
FIG. 5 is a schematic view of the retractable outlet/inlet of the present invention.
Fig. 6 is a schematic structural diagram of a discharge port provided by the present invention.
The reference numerals in the above figures illustrate:
1-ultrasonic generator, 2-ultrasonic conversion equipment, 3-container, 4-silencer, 5-ultrasonic vibrator, 6-amplitude transformer, 7-feed inlet, 71-first sleeve, 72-second sleeve, 73-third sleeve, 8-discharge outlet, 81-cone, 82-first baffle, 83-second baffle and 9-metal shell/metal container.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described below with reference to the accompanying drawings and examples.
Example 1:
as shown in fig. 1 to 6, the present embodiment discloses an array type ultrasonic disperser apparatus, which mainly comprises an ultrasonic generator 1, a container 3 for loading a solution to be stirred/mixed, a horn 6, a silencer 4, and an ultrasonic vibrator 5. The side surface of the container 3 is provided with a mounting hole for mounting the amplitude transformer 6. One end of the amplitude transformer 6 is connected with the output end of the ultrasonic generator 1 through a lead, and the other end of the amplitude transformer is inserted into the mounting hole of the container 3 and is fixedly connected with the container 3. The ultrasonic vibrator 5 is fixedly arranged on the end part of the other end of the amplitude transformer 6 and is connected with the output end of the ultrasonic generator 1 through the amplitude transformer 6 and a lead. The silencer 4 is installed outside the container 3 and wraps the container 3.
Specifically, the top of the container 3 is provided with a feeding hole 7 for feeding. The feed inlet 7 is provided with three sleeves with sequentially reduced tube diameters, namely a first sleeve 71, a second sleeve 72 and a third sleeve 73. One end of the first sleeve 71 is fixedly installed on the feed port 7, and the other end is provided with a first protrusion protruding inwards. One end of the second sleeve 72 is inserted into the first sleeve 71, and a second protrusion protruding outward is provided thereon, and a third protrusion protruding inward is provided at the other end. One end of the third sleeve 73 is inserted into the second sleeve 72, and a fourth protrusion protruding outward is formed thereon. The three sleeves are connected in a nested manner, and the extension of the feed port 7 is realized through the extension and contraction among the sleeves.
Specifically, the bottom of the container 3 is provided with a discharge hole 8 for discharging. The discharge port 8 is provided with a cone cylinder 81, a first baffle 82 and a second baffle 83. The first blocking piece 82 and the second blocking piece 83 are provided with fan-shaped notches for facilitating the solution to pass through. The first blocking piece 82 is arranged on the discharge hole 8 and is fixedly connected with the container 3. The second baffle 83 is disposed at one end of the conical cylinder 81 and is fixedly connected with the conical cylinder 81. One end of the conical cylinder 81 is installed on the discharge port 8 and can rotate around the central shaft of the discharge port 8, so that the first blocking piece 82 compresses the second blocking piece 83, and the fan-shaped gaps on the first blocking piece 82 and the second blocking piece 83 are opened, closed or adjusted by rotating the conical cylinder 81.
In a preferred embodiment of the present invention, the tapered cylinder 81 is fixedly connected to the second blocking piece 83, and the second blocking piece 83 is riveted to the middle of the first blocking piece 82.
Further, the silencing device 4 comprises a metal shell 9 and silencing cotton. The metal casing 9 is arranged outside the container 3 and encloses the container 3. The sound-deadening cotton is filled between the metal shell 9 and the container 3.
As a preferred version of the invention, the horn 6 is arranged on opposite sides of the container 3.
In a preferred embodiment of the present invention, the number of the horn 6 is eight, and the horn 6 is symmetrically disposed on two opposite sides of the container 3.
Further, a gasket is arranged on the amplitude transformer 6. The gasket is arranged on the amplitude transformer 6, the inner ring of the gasket is fixedly connected with the amplitude transformer 6, and the side surface of the gasket is fixedly connected with the container 3.
As a preferred embodiment of the present invention, the ultrasonic generator 1 is a high-power ultrasonic generator.
The working process and principle of the invention are as follows: when the ultrasonic dispersion device is used, the feed port 7 is extended, a pre-dispersion sample is poured into the container 3 through the telescopic feed port 7, the required frequency and dispersion time are adjusted on the ultrasonic generator 1 according to the required stirring degree, the ultrasonic converters distributed in an array mode start to work through the ultrasonic vibrators 5 and the ultrasonic amplitude transformer 6, ultrasonic waves are fully propagated and interacted in a solution, and the dispersion effect is greatly enhanced. After the dispersing material is discharged, the cone of the discharge port 8 is rotated to discharge the dispersing material from the lower opening. The invention also has the advantages of simple structure, convenient operation and easy implementation.
Example 2:
as shown in fig. 1, the present embodiment provides an array type ultrasonic disperser apparatus comprising an ultrasonic generator 1 and an ultrasonic wave converting device portion 2, a container portion 3, and a silencer portion 4; the ultrasonic generator is a high-power common ultrasonic generator; the ultrasonic conversion equipment part is shown in figure 2 and comprises 8 ultrasonic vibrators 5 and a matched amplitude transformer 6 thereof, wherein the ultrasonic vibrators 5 are welded at the cylindrical bottom of the matched amplitude transformer 6, and the output end of an ultrasonic generator 1 is connected with the amplitude transformer 6 to provide power; the container part 3 is shown in fig. 3 and is divided into an upper feeding hole 7, a lower discharging hole 8 and a metal container 9; the silencing equipment consists of a metal shell and silencing cotton. The power supply is connected with the ultrasonic generator, the 8 ultrasonic converters are connected with the output end of the ultrasonic generator, four circular openings are respectively formed in two sides of the container, and the ultrasonic converters are connected from the openings, so that the ultrasonic amplitude transformer rods are arranged in an array mode.
As shown in figure 4, the feed inlet of the invention is arranged at the top end of the container and is cylindrical, the top end is provided with a round cover which consists of three cylinders and is a telescopic device, the cylinders are pulled out during filling, as shown in the shape of the left end of figure 4, the filling opening is extended to be beneficial to filling, and after filling, the filling opening is shortened as shown in the right side of figure 4, so that the filling opening is ensured to be in the silencing shell, liquid is prevented from splashing out, and the silencing effect is ensured.
As shown in fig. 5, the discharge port is arranged at the bottom of the container and is a conical discharge port, and before discharging, the discharge port is in a closed state in the middle of fig. 5; when discharging, the cone barrel is rotated to enable the vacant parts of the upper and lower layers of circular metal sheets at the top of the cone to be opposite to form a channel.
The working process is as follows:
and (3) extending the feed port, pouring the pre-dispersed sample into the container through the telescopic feed port, adjusting the required frequency and dispersion time on the ultrasonic generator according to the required stirring degree, and starting the ultrasonic converters distributed in an array manner to work through the ultrasonic vibrators and the ultrasonic amplitude transformer, so that the ultrasonic waves are fully propagated and interacted in the solution, and the dispersion effect is greatly enhanced. After the dispersing material is discharged, the discharge port cone is rotated to discharge the dispersing material from the lower opening.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (9)
1. The array type ultrasonic disperser device is characterized by comprising an ultrasonic generator, a container for loading a solution to be dispersed/mixed, an amplitude transformer, a silencing device and an ultrasonic vibrator; the side surface of the container is provided with a mounting hole for mounting the amplitude transformer; one end of the amplitude transformer is connected with the output end of the ultrasonic generator through a lead, and the other end of the amplitude transformer is inserted into the mounting hole of the container and is fixedly connected with the container; the ultrasonic vibrator is fixedly arranged on the end part of the other end of the amplitude transformer and is connected with the output end of the ultrasonic generator through the amplitude transformer and a lead; the silencer is arranged on the outer side of the container and wraps the periphery of the container.
2. The array ultrasonic disperser apparatus of claim 1, wherein the top of the vessel is provided with a feed inlet for feeding; the feed inlet is provided with three sleeves with sequentially reduced cylinder diameters, namely a first sleeve, a second sleeve and a third sleeve; one end of the first sleeve is fixedly arranged on the feeding hole, and the other end of the first sleeve is provided with a first bulge which protrudes inwards; one end of the second sleeve is inserted into the first sleeve, a second bulge protruding outwards is arranged on the second sleeve, and a third bulge protruding inwards is arranged at the other end of the second sleeve; one end of the third sleeve is inserted into the second sleeve, and a fourth bulge protruding outwards is arranged on the third sleeve; the three sleeves are connected in an embedded mode, and the extension of the feeding hole is achieved through the extension and contraction among the sleeves.
3. The array ultrasonic disperser apparatus of claim 1, wherein the bottom of the container is provided with a discharge port for discharging; the discharge port is provided with a conical cylinder, a first baffle and a second baffle; the first baffle plate and the second baffle plate are respectively provided with a fan-shaped notch for facilitating the solution to pass through; the first baffle is arranged on the discharge hole and is fixedly connected with the container; the second baffle is arranged at one end of the conical barrel and is fixedly connected with the conical barrel; one end of the cone cylinder is installed on the discharge port and can rotate around the central shaft of the discharge port, so that the first blocking piece compresses the second blocking piece, and the fan-shaped notch in the first blocking piece and the second blocking piece is opened, closed or adjusted by rotating the cone cylinder.
4. The array ultrasonic disperser device of claim 3, wherein the cone is fixedly connected to a second baffle, and the second baffle is riveted to the middle of the first baffle.
5. The array ultrasonic disperser device of claim 1, wherein the sound damping device comprises a metal housing and sound damping cotton; the metal shell is arranged outside the container and wraps the periphery of the container; the sound attenuation cotton is filled between the metal shell and the container.
6. The array ultrasonic disperser apparatus of claim 1, wherein the horns are disposed on opposite sides of the vessel.
7. The array ultrasonic disperser apparatus of claim 1, wherein the number of horns is set to two to ten groups symmetrically disposed on opposite sides of the vessel.
8. The array ultrasonic disperser apparatus of claim 1, wherein a spacer is further disposed on the horn; the gasket is arranged on the amplitude transformer, the inner ring of the gasket is sleeved in the amplitude transformer to be fixedly connected, and the side surface of the gasket is fixedly welded with the container.
9. The array ultrasonic disperser device of claim 1, wherein the ultrasonic generators are 6kW-10kW power ultrasonic generators.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010588032.3A CN111974289A (en) | 2020-06-24 | 2020-06-24 | Array type ultrasonic disperser device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010588032.3A CN111974289A (en) | 2020-06-24 | 2020-06-24 | Array type ultrasonic disperser device |
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| Publication Number | Publication Date |
|---|---|
| CN111974289A true CN111974289A (en) | 2020-11-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010588032.3A Pending CN111974289A (en) | 2020-06-24 | 2020-06-24 | Array type ultrasonic disperser device |
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| CN (1) | CN111974289A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201905784U (en) * | 2011-01-11 | 2011-07-27 | 谭凯 | Novel condiment bottle |
| CN205868136U (en) * | 2016-08-01 | 2017-01-11 | 林荣良 | Be provided with stirring formula ultrasonic dispersion equipment of polygon treatment trough |
| CN107252658A (en) * | 2017-08-07 | 2017-10-17 | 东莞市剑牌超声波科技有限公司 | A kind of groove type ultrasonic ripple liquid handling device |
| CN207446122U (en) * | 2017-08-07 | 2018-06-05 | 东莞市剑牌超声波科技有限公司 | A kind of pot type ultrasonic liquid processing unit |
| CN209635470U (en) * | 2019-01-25 | 2019-11-15 | 武汉宇格电力设备有限公司 | A kind of telescopic dry ash blanking casing |
-
2020
- 2020-06-24 CN CN202010588032.3A patent/CN111974289A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201905784U (en) * | 2011-01-11 | 2011-07-27 | 谭凯 | Novel condiment bottle |
| CN205868136U (en) * | 2016-08-01 | 2017-01-11 | 林荣良 | Be provided with stirring formula ultrasonic dispersion equipment of polygon treatment trough |
| CN107252658A (en) * | 2017-08-07 | 2017-10-17 | 东莞市剑牌超声波科技有限公司 | A kind of groove type ultrasonic ripple liquid handling device |
| CN207446122U (en) * | 2017-08-07 | 2018-06-05 | 东莞市剑牌超声波科技有限公司 | A kind of pot type ultrasonic liquid processing unit |
| CN209635470U (en) * | 2019-01-25 | 2019-11-15 | 武汉宇格电力设备有限公司 | A kind of telescopic dry ash blanking casing |
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Application publication date: 20201124 |
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