CN104889106A - Floating vibrator ultrasound salt bath compound cleaning machine and use method thereof - Google Patents
Floating vibrator ultrasound salt bath compound cleaning machine and use method thereof Download PDFInfo
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- CN104889106A CN104889106A CN201510319773.0A CN201510319773A CN104889106A CN 104889106 A CN104889106 A CN 104889106A CN 201510319773 A CN201510319773 A CN 201510319773A CN 104889106 A CN104889106 A CN 104889106A
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- oscillator
- cleaning machine
- ultrasonic
- rinse bath
- salt bath
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
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- Cleaning By Liquid Or Steam (AREA)
Abstract
The invention discloses a floating vibrator ultrasound salt bath compound cleaning machine and a use method thereof. The floating vibrator ultrasound salt bath compound cleaning machine comprises a sealed machine frame, wherein a thermal insulation fan is arranged at the upper end of the sealed machine frame, a vibrator plate used to movably install an ultrasonic vibrator is vertically arranged on the outer side of the middle of the machine frame, a rinse tank is arranged on the lower portion of the interior of the machine frame, a work platform is horizontally arranged in the rinse tank, a support plate is arranged below the work platform, and a heating coil heated through an electromagnetic heating mode is arranged below the support plate. The floating vibrator ultrasound salt bath compound cleaning machine and the use method thereof have the advantages that 1) by using the electromagnetic heating mode to heat the heating coil, sustainable work can be achieved when fused salt is under 300 degree centigrade, a whole use labor hour is provided, and cleaning efficiency is improved; 2) by using the electromagnetic heating mode, accurate control for work temperature of the floating vibrator ultrasound salt bath compound cleaning machine is achieved, temperature control accuracy for the floating vibrator ultrasound salt bath compound cleaning machine is raised to +/-5 degree centigrade, a heating range from 170 degree centigrade to 300 degree centigrade is achieved, and heating time is reduced to 10min; 3) by using the vibrator plate to fix the ultrasonic vibrator, the ultrasonic vibrator is prevented from falling off due to high temperature.
Description
Technical field
The present invention relates to a kind of cleaning machine, relate to a kind of ultrasonic salt bath composite cleaning machine of floating oscillator and the using method thereof that are applicable to manufacture again in machinery industry cleaning parts specifically.
Background technology
Research both at home and abroad about industry cleaning link can be divided into roughly physical cleaning and Chemical cleaning two class, but in the cleaning of reality, often has physics, chemical action concurrently.According to the complexity etc. of the position cleaned, object, material, the cleaning technique used in cleaning process and method are also different, usually need to apply various cleaning method continuously or simultaneously.The cleaning method of usual employing has soaking and washing, drip washing, jet cleaning, Cleaning by High Pressure Water Jet, shot-peening cleaning, ball blast cleaning, Ultrasonic Cleaning, thermal decomposition cleaning, electrolytic cleaned, laser cleaning, Dry ice cleaning, ultraviolet-ozone clean and fused salt cleaning and combined type cleaning method etc. thereof.
Cleaning step is again the main source polluted in manufacture process, and because of the raising that the feature of environmental protection requires, chemical cleaning method will be eliminated gradually, and physical cleaning method will obtain larger development.The more physical cleaning technology of domestic and international application has Cleaning by High Pressure Water Jet, PIG cleaning, Dry ice cleaning, ultrasonic cleaning and laser cleaning.Physical cleaning is the cleaning technique had comparative advantage in the world at present, physical cleaning to pollute little, flexible operation, substituted chemistry gradually cleans and becomes the main flow of industry cleaning link by the advantage such as corrosion-free.At present, physical cleaning has become the main flow cleaning technique of western developed country, and accounted for more than 80% of the cleaning market share, the U.S. has accounted for 90% of the industry cleaning link market share.And the domestic physical cleaning market share accounts for 30%, Chemical cleaning accounts for 70%.Chemical cleaning is seriously polluted, and manual cleaning cost is high, efficiency is low, cleaning is thorough not, has larger limitation, and these can not meet the requirement of engine remanufacturing cleaning all far away, and research, application green cleaning technology are extremely urgent.
Manufacturing the cleaning/Removal Technology of parts, the Non-Destructive Testing of remanufacturing old parts part and life prediction technology and parts defect repair techniques is again three principal elements restricting again manufacturing development.At present, then manufacturing has been made some explorations and has attempted in cleaning technique, and the cleaning technique adopted has throwing/blast cleaning, high-temperature roasting cleaning, Traditional Man cleaning, HTHP water jet cleaning, Chemical cleaning, ultrasonic cleaning, vibration washing.At present, combine about remanufacturing old parts pollutant both at home and abroad and formation mechanism study, ultrasonic fused salt (compound) cleaning is to the removal effect of pollution layer and to realize principle relatively less, carrying out correlative study can provide theory and technology to instruct for manufacturing cleaning again.Unifunctional cleaning equipment manufacturer is a lot, but temporarily blank towards manufacturing more, the baroque professional equipment of Chen Pin surface contaminant again, thus again manufacturing to be badly in need of realizing automaticity high, the free of contamination professional equipment of clean and effective.In conjunction with enterprise's productive prospecting, develop complete cleaning equipment and can promote again manufacturing development.
Number of patent application is [201310028367.X], name is called: the patent of " ultrasonic salt bath composite cleaning machine ", and number of patent application is [201310439578.2], name is called: all propose a kind of novel cleaning technique in the patent of " Novel ultrasonic salt bath composite cleaning machine ", is directed to and manufactures two pieces oxide on surface again, sulfide, greasy dirt, carbon distribution, incrustation scale have certain cleaning performance.But, in the process that reality uses, whole heating tube in these two sections of patents all works, heating tube works 30 minutes in the fluid temperature of 250 DEG C, heating tube is in heated condition always during this period, and expose aerial part heating tube surface loading too large, internal temperature is too high, easily cause heating tube internal expansion, thus cause heating tube to break.And heating tube belongs to easy wearing detail, be easy in the process of cleaning, because the collision of workpiece causes irreversible damage to heating tube, and due to its replacing cumbersome, once change, equipment can not carry out work, meanwhile, a large amount of manpower, material resources and financial resources can be consumed during maintenance of equipment.In addition, in above two patents, ultrasonic vibrator is arranged on the outer wall of rinse bath, when ultrasonic vibrator vibrated strong time, easily come off, and the position will be able to not cleaned according to part adjustment ultrasonic vibrator setting position, make cleaning efficiency low.
Summary of the invention
The present invention is in order to provide a kind of cleaning efficiency ultrasonic salt bath composite cleaning machine of floating oscillator that is high, that can control heating-up temperature and using method thereof.
In order to reach above-mentioned purpose, the present invention adopts following technical scheme:
A kind of ultrasonic salt bath composite cleaning machine of oscillator that floats, comprise a closed frame, in the upper end of frame, heat insulation blower fan is set, arrange at the middle outside upright of frame one is installed ultrasonic vibrator oscillator plate for activity, in frame, bottom arranges rinse bath, in rinse bath, be horizontally disposed with workbench, in the below of workbench, gripper shoe is set, arrange the heater coil adopting Electromagnetic Heating in the below of gripper shoe, outside frame, arrange controller, controller is connected with heater coil.
Further, heat insulation blower fan is connected with described frame by the protective cover in inversed taper platform shape.
Further, heat-insulation layer is set between described rinse bath and described frame.
Further, gripper shoe is glass-ceramic plate.
Further, oscillator plate lies in a horizontal plane in the top of rinse bath, and described oscillator plate arranges multiple installing hole.
Further, in installing hole, screw thread is set.
Further, ultrasonic vibrator is arranged in described oscillator plate by described installing hole.
Further, the Epsom salts pipe communicated with described rinse bath is set in the bottom of described rinse bath.
Further, Epsom salts pipe is obliquely installed, and the Epsom salts mouth of described Epsom salts pipe is arranged on the outside of described frame.
Further, observation window is set in the centre of described frame.
The using method of the ultrasonic salt bath composite cleaning machine of a kind of floating oscillator:
1) in rinse bath, place the fused salt of setting volume;
2) open the gauge tap of heater coil, adjustment heating-up temperature, melts fused salt;
3), after fused salt melts, workpiece is placed on the table;
4) according to the workpiece that will clean, ultrasonic vibrator is fixed in oscillator plate;
5) oscillator plate being fixed with ultrasonic vibrator is arranged on the top of rinse bath;
6) continue heating, observe from observation window and whether cleaned;
7) oscillator plate is taken off from rinse bath top;
8) workpiece is taken out from workbench, complete cleaning;
9) workpiece of cleaning will be needed to place on the table, repeat step 4)-step 8), until to have cleaned or fused salt does not reach instructions for use, fused salt has been discharged from Epsom salts mouth.
Operation principle of the present invention is: the heater coil adopting Electromagnetic Heating, utilize magnetic field induction eddy heating for heating principle, high frequency electric is utilized to produce magnetic field by coil, when magnetic field is by rinse bath bottom land, produce countless little eddy current, make rinse bath heating at a high speed voluntarily, fused salt in heated wash groove, when the workpiece that will clean enters in rinse bath, produce eddy current within the workpiece, make workpiece be heated rapidly to operating temperature; Ultrasonic vibrator is fixed in oscillator plate, by regulating the position of ultrasonic vibrator in oscillator plate installing hole, by regulating the position of ultrasonic vibrator in oscillator plate installing hole, by regulating the height of oscillator in oscillator plate installing hole, oscillator is made to produce difference in height in rinse bath liquid, realize the change of ultrasonic intensity Z axis, realize oscillator floating adjustment in the Z-axis direction.Oscillator is arranged in different installing holes, just achieve the change in X, Y-axis, constitute three-dimensional ultrasonic wave and field occurs, different according to the position of pollutant on part, the position of ultrasonic vibrator in oscillator plate and height can be regulated, can realize cleaning the emphasis of keypoint part, simultaneously also can by regulating the position of oscillator in X, Y, Z axis, in rinse bath, produce uniform oscillator field, prevent the generation due to standing wave from causing damage or cleaning not exclusively to workpiece.
The invention has the beneficial effects as follows:
1) by adopting the mode of Electromagnetic Heating to heat heater coil, making temperature of molten salt sustainable work 300 DEG C time, reducing the man-hour of cleaning, the position of ultrasonic vibrator is set as the case may be, improves cleaning efficiency;
2) adopt the mode of Electromagnetic Heating, the operating temperature of cleaning machine achieves accurate control, and precision brings up to ± and 5 DEG C, realize heated perimeter 170 DEG C-300 DEG C, the heat time reduces to 10min;
3) adopt oscillator plate to fix ultrasonic vibrator, avoid ultrasonic vibrator and be arranged on frame outer wall because vibrating strong and coming off of causing;
4) utilize heat insulation blower fan to carry out air draft in cleaning machine, accelerate exhausting speed, realize fast cooling, do not need to utilize water to carry out cool cycles, substantially increase the space availability ratio of equipment, decrease the consumption to water.
Accompanying drawing explanation
Fig. 1 is the outside drawing of composite cleaning machine in the present invention;
Fig. 2 is the cut-away view of composite cleaning machine in the present invention;
Fig. 3 is the structure chart of the ultrasonic vibrator adopted in the present invention;
Fig. 4 is the structure chart of oscillator plate in the present invention;
Wherein: 1. heat insulation blower fan, 2. protective cover, 3. heat-insulation layer, 4. workbench, 5. rinse bath, 6. glass-ceramic plate, 7. heater coil, 8. Epsom salts mouth, 9. ultrasonic vibrator, 10. oscillator plate.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, clear, complete description is carried out to the technical scheme in the embodiment of the present invention.
Embodiment 1
As Figure 1-4, a kind of ultrasonic salt bath composite cleaning machine of oscillator that floats, comprise a closed frame, arrange heat insulation blower fan 1 in the upper end of frame, heat insulation blower fan 1 is connected with described frame by the protective cover 2 in inversed taper platform shape, the centre of frame is rectangular-shaped, the size of the mid portion of frame is greater than the position of bottom, the centre of frame arranges observation window, in frame, bottom arranges in rectangular-shaped rinse bath 5, on the top of rinse bath, oscillator plate is set, oscillator plate arranges ultrasonic vibrator, during use, the head of ultrasonic vibrator is immersed in the liquid of rinse bath, the lower width of frame is less than the width at middle part, at the lower horizontal of rinse bath 5, a workbench 4 is set, gripper shoe for supporting rinse bath is set in the below of workbench 4, gripper shoe is glass-ceramic plate 6, the heater coil 7 adopting Electromagnetic Heating is set in the lower horizontal of gripper shoe, one controller is set outside frame, controller controls the heating-up temperature of heater coil 7 by Non-follow control.
Between described rinse bath and described frame, arrange heat-insulation layer 3, heat-insulation layer 3 is coated on outside rinse bath, for preventing scattering and disappearing of heat.
Oscillator plate is shelved on the top of rinse bath, the size that the size of oscillator plate is slightly less than central rack is greater than again the size of rinse bath, its two ends are fixed on rinse bath top or are not fixed, and oscillator plate 10 arranges multiple installing hole, and multiple installing hole is that 4 row 4 row are arranged in oscillator plate; In installing hole, screw thread is set, screw thread is set outside ultrasonic vibrator and coordinates with oscillator plate, be convenient to regulate the position of ultrasonic vibrator in oscillator plate by the setting of screw thread.
Arrange the Epsom salts pipe communicated with described rinse bath in the bottom of rinse bath, Epsom salts pipe is obliquely installed, and the Epsom salts mouth 8 of described Epsom salts pipe is arranged on the outside of described frame, and at Epsom salts mouth, place arranges Epsom salts valve.
Wherein, rinse bath, workbench and protective cover are that stainless steel material makes, and high temperature can be prevented the damage of each device; In addition, protective cover is provided with the door of an energy opening and closing.
Adopt the heater coil of Electromagnetic Heating, utilize magnetic field induction eddy heating for heating principle, high frequency electric is utilized to produce magnetic field by coil, when magnetic field is by rinse bath bottom land, produce countless little eddy current, make rinse bath heating at a high speed voluntarily, fused salt in heated wash groove, melted by fused salt, the size of oscillator plate is larger than rinse bath size, arranges a workbench in rinse bath, when the workpiece that will clean enters in rinse bath, oscillator plate is shelved on the top of rinse bath, produces eddy current so within the workpiece, make workpiece be heated rapidly to operating temperature, ultrasonic vibrator 9 is fixed in oscillator plate 10, according to the situation of the workpiece that will clean, oscillator plate 10 arranges one or more ultrasonic vibrator, by regulating the position of ultrasonic vibrator 9 in oscillator plate 10 installing hole, the ultrasonic oscillator that makes produces difference in height in rinse bath liquid, realize the change of ultrasonic intensity Z axis, oscillator is arranged in different installing holes, just achieve at X, the change of Y-axis, constitute three-dimensional ultrasonic wave and field occurs, realize floating of ultrasonic vibrator, the high and low position of ultrasonic vibrator constitutes three-dimensional ultrasonic wave and field occurs, uniform oscillator field is produced in rinse bath, prevent the generation due to standing wave from causing damage or cleaning not exclusively to workpiece.
Embodiment 2
A kind of ultrasonic salt bath composite cleaning machine of oscillator that floats, comprise a closed frame, arrange heat insulation blower fan 1 in the upper end of frame, heat insulation blower fan 1 is connected with described frame by the protective cover 2 in inversed taper platform shape; The centre of frame is rectangular-shaped, the size of the mid portion of frame is greater than the position of bottom, the centre of frame arranges observation window, and in frame, bottom is arranged in rectangular-shaped rinse bath, arranges oscillator plate on the top of rinse bath, oscillator plate arranges ultrasonic vibrator, during use, the head of ultrasonic vibrator is immersed in the liquid of rinse bath, arranges multiple workbench at the lower horizontal of rinse bath, multiple workbench be arranged in parallel, the distance of interval setting on multiple workbench; Arrange the gripper shoe for supporting rinse bath in the below of workbench, gripper shoe is glass-ceramic plate, arranges the heater coil adopting Electromagnetic Heating in the below of gripper shoe.
Between described rinse bath and described frame, arrange heat-insulation layer 3, heat-insulation layer 3 is coated on outside rinse bath 5, for preventing scattering and disappearing of heat; Oscillator plate 10 is shelved on the top of rinse bath, and oscillator plate arranges multiple installing hole, and multiple installing hole is that 4 row 4 row are arranged in oscillator plate; In installing hole, screw thread is set, is convenient to regulate the position of ultrasonic vibrator 9 in oscillator plate by the setting of screw thread.
Embodiment 3
A kind of ultrasonic salt bath composite cleaning machine of oscillator that floats, comprise a closed frame, arrange heat insulation blower fan 1 in the upper end of frame, heat insulation blower fan 1 is connected with described frame by the protective cover 2 in inversed taper platform shape, the centre of frame is rectangular-shaped, the size of the mid portion of frame is greater than the position of bottom, the centre of frame arranges observation window, in frame, lower vertical arranges multiple parallel, all in rectangular-shaped rinse bath 5, on the top of rinse bath, oscillator plate is set, oscillator plate arranges ultrasonic vibrator, during use, the head of ultrasonic vibrator is immersed in the liquid of rinse bath, a workbench 4 is respectively horizontally disposed with in the bottom of each rinse bath 5, gripper shoe for supporting rinse bath is set in the below of workbench 4, gripper shoe is glass-ceramic plate 6, the heater coil adopting Electromagnetic Heating is set in the below of gripper shoe.
Between described rinse bath and described frame, arrange heat-insulation layer, heat-insulation layer is coated on outside rinse bath, for preventing scattering and disappearing of heat; Oscillator plate is shelved on the top of rinse bath, and oscillator plate arranges multiple installing hole, and multiple installing hole is that 3 row 3 row are arranged in oscillator plate; In installing hole, screw thread is set, is convenient to regulate the position of ultrasonic vibrator in oscillator plate by the setting of screw thread; The cleaning to different parts is realized by multiple rinse bath.
The using method of the ultrasonic salt bath composite cleaning machine of a kind of floating oscillator:
1) in rinse bath, place the fused salt of setting volume;
2) open the gauge tap of heater coil, adjustment heating-up temperature, melts fused salt;
3), after fused salt melts, workpiece is placed on the table;
4) according to the workpiece that will clean, ultrasonic vibrator is fixed in oscillator plate;
5) oscillator plate being fixed with ultrasonic vibrator is arranged on the top of rinse bath;
6) continue heating, observe from observation window and whether cleaned;
7) oscillator plate is taken off from rinse bath top;
8) workpiece is taken out from workbench, complete cleaning;
9) workpiece of cleaning will be needed to place on the table, repeat step 4)-step 8), until to have cleaned or fused salt does not reach instructions for use, fused salt has been discharged from Epsom salts mouth.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. the ultrasonic salt bath composite cleaning machine of floating oscillator, it is characterized in that, comprise a closed frame, in the upper end of frame, heat insulation blower fan is set, at the middle outside upright of frame, one is installed ultrasonic vibrator oscillator plate for activity is set, in frame, bottom arranges rinse bath, workbench is horizontally disposed with in rinse bath, in the below of workbench, gripper shoe is set, the heater coil adopting Electromagnetic Heating is set in the below of gripper shoe, outside frame, arrange controller, controller is connected with heater coil.
2. a kind of ultrasonic salt bath composite cleaning machine of oscillator that floats as claimed in claim 1, it is characterized in that, described heat insulation blower fan is connected with described frame by the protective cover in inversed taper platform shape.
3. a kind of ultrasonic salt bath composite cleaning machine of oscillator that floats as claimed in claim 1, is characterized in that, between described rinse bath and described frame, arrange heat-insulation layer.
4. a kind of ultrasonic salt bath composite cleaning machine of oscillator that floats as claimed in claim 1, it is characterized in that, described gripper shoe is glass-ceramic plate.
5. a kind of ultrasonic salt bath composite cleaning machine of oscillator that floats as claimed in claim 1, it is characterized in that, described oscillator plate lies in a horizontal plane in the top of rinse bath, and described oscillator plate arranges multiple installing hole.
6. a kind of ultrasonic salt bath composite cleaning machine of oscillator that floats as claimed in claim 5, is characterized in that, arrange screw thread in described installing hole.
7. the one as described in claim 5 or 6 is floated the ultrasonic salt bath composite cleaning machine of oscillator, and it is characterized in that, described ultrasonic vibrator is arranged in described oscillator plate by described installing hole.
8. a kind of ultrasonic salt bath composite cleaning machine of oscillator that floats as claimed in claim 1, it is characterized in that, arrange the Epsom salts pipe communicated with described rinse bath in the bottom of described rinse bath, described Epsom salts pipe is obliquely installed, and the Epsom salts mouth of described Epsom salts pipe is arranged on the outside of described frame.
9. a kind of ultrasonic salt bath composite cleaning machine of oscillator that floats as claimed in claim 1, is characterized in that, arrange observation window at the center vertical of described frame.
10. the using method of the ultrasonic salt bath composite cleaning machine of a kind of floating oscillator as described in above-mentioned arbitrary claim, it is characterized in that, concrete steps are as follows:
1) in rinse bath, place the fused salt of setting volume;
2) open the gauge tap of heater coil, adjustment heating-up temperature, melts fused salt;
3), after fused salt melts, workpiece is placed on the table;
4) according to the workpiece that will clean, ultrasonic vibrator is fixed in oscillator plate;
5) oscillator plate being fixed with ultrasonic vibrator is arranged on the top of rinse bath;
6) continue heating, observe from observation window and whether cleaned;
7) oscillator plate is taken off from rinse bath top;
8) workpiece is taken out from workbench, complete cleaning;
9) workpiece of cleaning will be needed to place on the table, repeat step 4)-step 8), until to have cleaned or fused salt does not reach instructions for use, fused salt has been discharged from Epsom salts mouth.
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| CN201510319773.0A CN104889106B (en) | 2015-06-11 | 2015-06-11 | A kind of ultrasonic salt bath composite cleaning machine of floating oscillator and its using method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105689324A (en) * | 2016-03-10 | 2016-06-22 | 北京哈密瓜科技有限公司 | Integrated type ultrasonic cleaning and steam sterilizing equipment |
| CN107983718A (en) * | 2017-12-28 | 2018-05-04 | 徐工集团工程机械有限公司 | Fused salt ULTRASONIC COMPLEX cleaning system |
| CN109127582A (en) * | 2018-11-12 | 2019-01-04 | 湖南迪清科技有限公司 | A kind of automatic ultrasonic salt bath cleaning device |
| CN110614254A (en) * | 2019-09-29 | 2019-12-27 | 山东大学 | Composite cleaning method for complex dirt |
| CN112006810A (en) * | 2020-09-21 | 2020-12-01 | 谭健荣 | Pretreatment equipment before implantation of artificial blood vessel operation |
| US11964308B2 (en) | 2021-09-29 | 2024-04-23 | Jiangsu Xcmg Construction Machinery Research Institute Ltd. | Molten salt ultrasonic cleaning machine, and molten salt ultrasonic cleaning method |
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| CN110614254B (en) * | 2019-09-29 | 2021-02-05 | 山东大学 | Composite cleaning method for complex dirt |
| CN112006810A (en) * | 2020-09-21 | 2020-12-01 | 谭健荣 | Pretreatment equipment before implantation of artificial blood vessel operation |
| US11964308B2 (en) | 2021-09-29 | 2024-04-23 | Jiangsu Xcmg Construction Machinery Research Institute Ltd. | Molten salt ultrasonic cleaning machine, and molten salt ultrasonic cleaning method |
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|---|---|
| CN104889106B (en) | 2017-03-01 |
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