CN114951122A - High-efficient environmental protection hydrocarbon cleaning machine - Google Patents
High-efficient environmental protection hydrocarbon cleaning machine Download PDFInfo
- Publication number
- CN114951122A CN114951122A CN202210584396.3A CN202210584396A CN114951122A CN 114951122 A CN114951122 A CN 114951122A CN 202210584396 A CN202210584396 A CN 202210584396A CN 114951122 A CN114951122 A CN 114951122A
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- Prior art keywords
- cleaning
- heat exchanger
- self
- distillation
- distillation tank
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- Pending
Links
- 238000004140 cleaning Methods 0.000 title claims abstract description 107
- 239000004215 Carbon black (E152) Substances 0.000 title claims abstract description 41
- 229930195733 hydrocarbon Natural products 0.000 title claims abstract description 41
- 150000002430 hydrocarbons Chemical class 0.000 title claims abstract description 41
- 230000007613 environmental effect Effects 0.000 title description 4
- 239000002904 solvent Substances 0.000 claims abstract description 42
- 238000004821 distillation Methods 0.000 claims description 52
- 239000007788 liquid Substances 0.000 claims description 40
- 239000000463 material Substances 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 238000001914 filtration Methods 0.000 description 5
- 239000002893 slag Substances 0.000 description 5
- 230000007306 turnover Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 3
- 238000010030 laminating Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- 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
- B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
-
- 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
- B08B3/14—Removing waste, e.g. labels, from cleaning liquid; Regenerating cleaning liquids
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
The invention relates to the technical field of heat treatment equipment, in particular to a high-efficiency environment-friendly hydrocarbon cleaning machine which comprises a solvent tank, a supporting frame, a cleaning cabin and a circulating cleaning assembly, wherein the circulating cleaning assembly comprises a self-cleaning coarse filter, a delivery pump, a pressure transmitter, a self-cleaning fine filter and a pressure difference controller, and a box body is independently manufactured in the solvent tank and placed below the cleaning cabin, so that the cleaning cabin and the solvent tank form an up-and-down split structure, and potential safety hazards caused by the condition that materials enter the cleaning cabin and collide with the solvent chamber are avoided; a circulating cleaning assembly is added behind the cleaning cabin, and a pressure transmitter is additionally arranged on a connecting part of the circulating cleaning assembly, so that the cleaning time and potential safety hazards caused by equipment blockage are reduced.
Description
Technical Field
The invention relates to the technical field of heat treatment equipment, in particular to a high-efficiency environment-friendly hydrocarbon cleaning machine.
Background
The cleaning cabin solvent of the cleaning machine directly returns to the solvent tank below, and the structure needs to adjust the cleaning time according to the pollution degree of the cleaning solvent because the cleaning time is accumulated and the amount of oil stains and iron chips of materials is large.
Because one cleaning machine is matched with a plurality of devices, and the matched devices are large-tonnage devices, the field adjustment workload is large, the cleaning time is long, and the danger is high.
Disclosure of Invention
The invention aims to provide an efficient and environment-friendly hydrocarbon cleaning machine, which solves the technical problems of large on-site adjustment workload, long cleaning time and dangerousness because one cleaning machine is matched with a plurality of devices and the matched devices are large-tonnage devices.
In order to achieve the purpose, the invention provides a high-efficiency environment-friendly hydrocarbon cleaning machine which comprises a solvent tank, a support frame, a cleaning cabin and a circulating cleaning assembly, wherein the circulating cleaning assembly comprises a self-cleaning coarse filter, a delivery pump, a pressure transmitter, a self-cleaning fine filter and a pressure difference controller, and the cleaning cabin is detachably connected with the support frame and is positioned above the support frame; the self-cleaning coarse filter, the delivery pump, the pressure transmitter and the self-cleaning fine filter are sequentially arranged between an oil return port and an oil inlet of the solvent tank, and the pressure difference controller is respectively connected with two ends of the self-cleaning fine filter.
The solvent box comprises a distillation box, a first heat exchanger, a second heat exchanger, a first distillation tank, a second distillation tank, a third heat exchanger and a fourth heat exchanger, the distillation box is arranged in the solvent box, the first heat exchanger and the second heat exchanger are respectively arranged on two sides of the distillation box, the output ends of the first heat exchanger and the second heat exchanger are respectively connected with the output end pipeline of the self-cleaning fine filter, the output ends of the first heat exchanger and the second heat exchanger are respectively connected with the input end pipelines of the first distillation tank and the second distillation tank, and the output ends of the first distillation tank and the second distillation tank are respectively connected with the input end pipelines of the third heat exchanger and the fourth heat exchanger.
The solvent box further comprises a first liquid level meter, a second liquid level meter, a first adjustable flowmeter, a second adjustable flowmeter and a thermocouple, wherein the first liquid level meter and the second liquid level meter are respectively used for measuring the hydrocarbon liquid level of the dirty liquid in the first distillation tank and the second distillation tank, the first adjustable flowmeter and the second adjustable flowmeter are respectively used for adjusting the hydrocarbon flow of the dirty liquid in the first distillation tank and the second distillation tank, and the thermocouple is installed in the distillation box and used for measuring the temperature of heat conduction oil.
Wherein, high-efficient environmental protection hydrocarbon cleaning machine still includes the distribution subassembly, the distribution subassembly set up in wash the top of case.
The distribution assembly comprises a traction pipe, a pneumatic ball valve and a distributor, the distributor is installed inside the cleaning cabin, the distributor is communicated with one end of the traction pipe through the pneumatic ball valve, and one end of the traction pipe is communicated with the output ends of the third heat exchanger and the fourth heat exchanger.
Wherein, the distributor still includes spiral pipe and jet-propelled head, the spiral pipe install in the inside in washing cabin, the jet-propelled head interval evenly set up in the bottom of spiral tank.
According to the efficient environment-friendly hydrocarbon cleaning machine, the solvent chamber is separately manufactured into the box body to be placed below the cleaning cabin, so that the cleaning cabin and the solvent box form an up-down split structure, and potential safety hazards caused by the fact that materials enter the cleaning cabin and collide the solvent chamber are avoided; the circulating cleaning assembly is additionally arranged behind the cleaning cabin, and the pressure transmitter is additionally arranged on the connecting part of the circulating cleaning assembly, so that the cleaning time is shortened, and potential safety hazards caused by equipment blockage are reduced.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
Fig. 1 is an overall configuration diagram of the first embodiment of the present invention.
Fig. 2 is a schematic structural view of a distillation tank according to a first embodiment of the present invention.
Fig. 3 is an overall configuration diagram of the second embodiment of the present invention.
Fig. 4 is an overall internal structural view of the second embodiment of the present invention.
Fig. 5 is a bottom view of a distributor of a second embodiment of the present invention.
Fig. 6 is a sectional view of a self-cleaning coarse filter according to a third embodiment of the present invention.
Fig. 7 is a schematic structural view of an inverted filter plate according to a third embodiment of the present invention.
101-solvent tank, 102-supporting frame, 103-cleaning cabin, 104-self-cleaning coarse filter, 105-delivery pump, 106-pressure transmitter, 107-self-cleaning fine filter, 108-pressure difference controller, 109-distillation tank, 110-first heat exchanger, 111-second heat exchanger, 112-first distillation tank, 113-second distillation tank, 114-third heat exchanger, 115-fourth heat exchanger, 116-first liquid level meter, 117-second liquid level meter, 118-first adjustable flowmeter, 119-second adjustable flowmeter, 120-thermocouple, 201-traction pipe, 202-pneumatic ball valve, 203-distributor, 204-spiral pipe, 205-gas spray head, 301-cylinder, 302-driving motor, 303-rotating shaft, 304-overturning filter plate, 305-liquid inlet pipe, 306-liquid outlet pipe, 307-slag outlet pipe, 308-fixing ring, 309-elastic ring, 310-filter screen and 311-sealing ring.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, and the embodiments described below with reference to the accompanying drawings are exemplary and intended to be illustrative of the present invention and should not be construed as limiting the present invention.
The first embodiment:
referring to fig. 1-2, wherein fig. 1 is an overall schematic structural view of a first embodiment of the present invention, fig. 2 is a schematic structural view of a distillation box of the first embodiment of the present invention, the present invention provides a high-efficiency environmental-friendly hydrocarbon cleaning machine, which includes a solvent box 101, a support frame 102, a cleaning chamber 103 and a circulation cleaning assembly, the support frame 102 is disposed above the solvent box 101, and the cleaning chamber 103 is detachably connected to the support frame 102 and is located above the support frame 102; the circulation cleaning assembly comprises a self-cleaning coarse filter 104, a delivery pump 105, a pressure transmitter 106, a self-cleaning fine filter 107 and a pressure difference controller 108, and the solvent tank 101 comprises a distillation tank 109, a first heat exchanger 110, a second heat exchanger 111, a first distillation tank 112, a second distillation tank 113, a third heat exchanger 114, a fourth heat exchanger 115, a first liquid level meter 116, a second liquid level meter 117, a first adjustable flow meter 118, a second adjustable flow meter 119 and a thermocouple 120.
For the specific embodiment, the supporting frame 102 is disposed above the solvent tank 101, the cleaning cabin 103 is detachably connected to the supporting frame 102 and is located above the supporting frame 102, the self-cleaning coarse filter 104, the conveying pump 105, the pressure transmitter 106 and the self-cleaning fine filter 107 are sequentially disposed between an oil return port and an oil inlet port of the solvent tank 101, the differential pressure controller 108 is respectively connected to two ends of the self-cleaning fine filter 107, the cleaned dirty liquid hydrocarbon solvent is conveyed to the self-cleaning coarse filter 104 by the conveying pump 105, and after filtration, the dirty liquid hydrocarbon solvent is conveyed to the self-cleaning fine filter 107 to complete twice filtration, and the pressure of the self-cleaning fine filter 107 is adjusted by the pressure transmitter 106.
Wherein the distillation tank 109 is arranged inside the solvent tank 101, the first heat exchanger 110 and the second heat exchanger 111 are respectively arranged at two sides of the distillation tank 109, the output ends of the first heat exchanger 110 and the second heat exchanger 111 are respectively connected with the output end pipeline of the self-cleaning fine filter 107, the output ends of the first heat exchanger 110 and the second heat exchanger 111 are respectively connected with the input end pipelines of the first distillation tank 112 and the second distillation tank 113, and the output ends of the first distillation tank 112 and the second distillation tank 113 are respectively connected with the input end pipelines of the third heat exchanger 114 and the fourth heat exchanger 115; the first liquid level meter 116 and the second liquid level meter 117 are respectively used for measuring the dirty liquid hydrocarbon liquid level inside the first distillation tank 112 and the second distillation tank 113, the first adjustable flowmeter 118 and the second adjustable flowmeter 119 are respectively used for adjusting the dirty liquid hydrocarbon flow of the first distillation tank 112 and the second distillation tank 113, and the thermocouple 120 is installed inside the distillation box 109 and is used for measuring the temperature of the heat conduction oil; dirty liquid hydrocarbon solvent enters the first heat exchanger 110 and the second heat exchanger 111, after heat exchange, the dirty liquid hydrocarbon solvent is respectively led into the first distillation tank 112 and the second distillation tank 113, clean hydrocarbon steam is cooled through the third heat exchanger 114 and the fourth heat exchanger 115, a traditional built-in cooling device is transferred to an external device, two distillation devices are manufactured in one oil tank, therefore, the distillation speed can be improved, the temperature in the distillation tank 109 can be stabilized, the structure has the further advantage of being convenient for modularization, and large-scale equipment can be assembled in a modularized mode in the future.
By using the efficient environment-friendly hydrocarbon cleaning machine of the embodiment, the hydrocarbon solvent of the cleaning dirty liquid is conveyed to the self-cleaning coarse filter 104 through the conveying pump 105, after the filtration is completed, the hydrocarbon solvent is conveyed to the self-cleaning fine filter 107 to complete the two times of filtration, the pressure of the self-cleaning fine filter 107 is adjusted through the pressure transmitter 106, and a solvent chamber is separately manufactured into a box body and placed below the cleaning chamber 103, so that the cleaning chamber 103 and the solvent tank 101 form an up-down split structure, and the potential safety hazard caused by the condition that the material enters the cleaning chamber 103 and collides the solvent chamber is avoided; the circulation cleaning assembly is added behind the cleaning cabin 103, and the connecting part of the circulation cleaning assembly is additionally provided with the pressure transmitter 106, so that the cleaning time and the potential safety hazard caused by equipment blockage are reduced.
Second embodiment:
referring to fig. 3-5 on the basis of the first embodiment, wherein fig. 3 is a schematic structural diagram of the whole of the second embodiment of the present invention, fig. 4 is a schematic structural diagram of the whole of the second embodiment of the present invention, fig. 5 is a bottom view of the distributor of the second embodiment of the present invention, the present invention provides a high efficiency environment-friendly hydrocarbon cleaning machine further comprising a distribution assembly, the distribution assembly comprises a traction pipe 201, a pneumatic ball valve 202 and a distributor 203, the distributor 203 further comprises a spiral pipe 204 and a gas spray head 205.
For the specific embodiment, the distributor 203 is installed inside the cleaning cabin 103, the distributor 203 is communicated with one end of the traction pipe 201 through the pneumatic ball valve 202, one end of the traction pipe 201 is communicated with the output ends of the third heat exchanger 114 and the fourth heat exchanger 115, the spiral pipe 204 is installed inside the cleaning cabin 103, the gas nozzles 205 are evenly arranged at the bottom of the spiral tank at intervals, the hydrocarbon solvent is evenly sprayed out through the spiral pipe 204 and the gas nozzles 205, and the hydrocarbon steam can be evenly distributed on the surfaces of the parts.
With the efficient and environment-friendly hydrocarbon cleaning machine of the embodiment, hydrocarbon vapor is introduced into the distributor 203 through the traction pipe 201 and is controlled by the pneumatic ball valve 202, the spiral pipe 204 and the gas nozzle 205 uniformly spray hydrocarbon solvent, and the hydrocarbon vapor can be uniformly distributed on the surface of the part.
The third embodiment of the present application is:
on the basis of the second embodiment, please refer to fig. 6-7, wherein fig. 6 is a cross-sectional view of a self-cleaning coarse filter according to a third embodiment of the present invention, fig. 7 is a schematic structural view of an inverted filter plate according to the third embodiment of the present invention, the high efficiency environmental protection hydrocarbon cleaning machine according to the present embodiment includes a cylinder 301, a driving motor 302, a rotating shaft 303, an inverted filter plate 304, a liquid inlet pipe 305, a liquid outlet pipe 306, and a slag outlet pipe 307, the inverted filter plate 304 includes a fixed ring 308, an elastic ring 309, and a filter screen 310, and the self-cleaning coarse filter 104 further includes a sealing ring 311.
To this embodiment, the liquid inlet pipe 305 is disposed on the top end of the cylinder 301 and is communicated with the oil return port of the solvent tank 101, the liquid outlet pipe 306 is disposed at the bottom of the cylinder 301, the slag outlet pipe 307 is communicated with the liquid outlet pipe 306 and is located below the liquid outlet pipe 306 and is controlled by an electric control valve, the driving motor 302 is disposed on the outer side wall of the cylinder 301, the output end of the driving motor 302 is provided with the rotating shaft 303, the rotating shaft 303 penetrates through the cylinder 301, the turnover filter plate 304 is fixedly connected with the rotating shaft 303 and is located inside the cylinder 301, the hydrocarbon solvent containing oil stain enters the cylinder 301 through the liquid inlet pipe 305, penetrates through the turnover filter plate 304, the filtration is completed, the liquid outlet pipe 306 is discharged, the driving motor 302 drives the rotating shaft 303 to rotate, and after the turnover filter plate 304 is turned over, the valve of the slag pipe 307 is opened and the filter residue is discharged through the slag pipe 307.
Wherein, fixed ring 308 with axis of rotation 303 fixed connection, and be located the inside of barrel 301, the lateral wall of fixed ring 308 is provided with elastic ring 309, filter screen 310 set up in the inside of fixed ring 308, through elastic ring 309 with the inside wall laminating of barrel 301, the fixed ring 308 that is convenient for rotates.
Secondly, the sealing rings 311 are respectively arranged at the two ends of the rotating shaft 303, and the air tightness of the cylinder 301 is ensured by arranging the sealing rings 311.
When the efficient environment-friendly hydrocarbon cleaning machine of the embodiment is used, a hydrocarbon solvent with oil stains enters the cylinder body 301 through the liquid inlet pipe 305, passes through the turnover filter plate 304, is filtered, and is discharged through the liquid outlet pipe 306, the driving motor 302 drives the rotating shaft 303 to rotate, after the turnover filter plate 304 is turned over, a valve of the residue outlet pipe 307 is opened, and filter residues are discharged through the residue outlet pipe 307; the filter screen 310 set up in the inside of solid fixed ring 308, through elasticity ring 309 with the inside wall laminating of barrel 301, the solid fixed ring 308 of being convenient for rotates.
While the above disclosure describes one or more preferred embodiments of the present invention, it is not intended to limit the scope of the claims to such embodiments, and one skilled in the art will understand that all or a portion of the processes performed in the above embodiments may be practiced without departing from the spirit and scope of the claims.
Claims (6)
1. A high-efficiency environment-friendly hydrocarbon cleaning machine, which is characterized in that,
the cleaning device comprises a solvent box, a support frame, a cleaning cabin and a circulating cleaning assembly, wherein the support frame is arranged above the solvent box, and the cleaning cabin is detachably connected with the support frame and is positioned above the support frame;
the circulating cleaning assembly comprises a self-cleaning coarse filter, a delivery pump, a pressure transmitter, a self-cleaning fine filter and a pressure difference controller, the self-cleaning coarse filter, the delivery pump, the pressure transmitter and the self-cleaning fine filter are sequentially arranged between an oil return port and an oil inlet of the solvent tank, and the pressure difference controller is respectively connected with two ends of the self-cleaning fine filter.
2. An efficient environmental-friendly hydrocarbon cleaning machine as defined in claim 1,
the solvent box comprises a distillation box, a first heat exchanger, a second heat exchanger, a first distillation tank, a second distillation tank, a third heat exchanger and a fourth heat exchanger, the distillation box is arranged in the solvent box, the first heat exchanger and the second heat exchanger are respectively arranged on two sides of the distillation box, the output ends of the first heat exchanger and the second heat exchanger are respectively connected with an output end pipeline of the self-cleaning fine filter, the output ends of the first heat exchanger and the second heat exchanger are respectively connected with input end pipelines of the first distillation tank and the second distillation tank, and the output ends of the first distillation tank and the second distillation tank are respectively connected with input end pipelines of the third heat exchanger and the fourth heat exchanger.
3. An efficient environmental-friendly hydrocarbon cleaning machine as defined in claim 2,
the solvent box further comprises a first liquid level meter, a second liquid level meter, a first adjustable flow meter, a second adjustable flow meter and a thermocouple, wherein the first liquid level meter and the second liquid level meter are respectively used for measuring the dirty liquid hydrocarbon liquid level inside the first distillation tank and the second distillation tank, the first adjustable flow meter and the second adjustable flow meter are respectively used for adjusting the dirty liquid hydrocarbon flow of the first distillation tank and the second distillation tank, and the thermocouple is installed inside the distillation box and used for measuring the temperature of heat conduction oil.
4. An efficient environmental-friendly hydrocarbon cleaning machine as defined in claim 3,
the high-efficiency environment-friendly hydrocarbon cleaning machine further comprises a distribution assembly, and the distribution assembly is arranged at the top end of the cleaning box.
5. An efficient environmental-friendly hydrocarbon cleaning machine as defined in claim 4,
the distribution assembly comprises a traction pipe, a pneumatic ball valve and a distributor, the distributor is installed inside the cleaning cabin, the distributor is communicated with one end of the traction pipe through the pneumatic ball valve, and one end of the traction pipe is communicated with the output ends of the third heat exchanger and the fourth heat exchanger.
6. An efficient environmental-friendly hydrocarbon cleaning machine as defined in claim 5,
the distributor further comprises a spiral pipe and air nozzles, the spiral pipe is installed inside the cleaning cabin, and the air nozzles are evenly arranged at the bottom of the spiral tank at intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210584396.3A CN114951122A (en) | 2022-05-26 | 2022-05-26 | High-efficient environmental protection hydrocarbon cleaning machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210584396.3A CN114951122A (en) | 2022-05-26 | 2022-05-26 | High-efficient environmental protection hydrocarbon cleaning machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114951122A true CN114951122A (en) | 2022-08-30 |
Family
ID=82955798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210584396.3A Pending CN114951122A (en) | 2022-05-26 | 2022-05-26 | High-efficient environmental protection hydrocarbon cleaning machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114951122A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118321248A (en) * | 2024-05-17 | 2024-07-12 | 绍兴先越材料技术有限公司 | Vacuum cleaner and use method thereof |
| CN118321248B (en) * | 2024-05-17 | 2024-10-29 | 绍兴先越材料技术有限公司 | Vacuum cleaner and use method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118321248A (en) * | 2024-05-17 | 2024-07-12 | 绍兴先越材料技术有限公司 | Vacuum cleaner and use method thereof |
| CN118321248B (en) * | 2024-05-17 | 2024-10-29 | 绍兴先越材料技术有限公司 | Vacuum cleaner and use method thereof |
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Application publication date: 20220830 |
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