CN112408740A - Sludge dewatering squeezes and folds spiral shell machine - Google Patents
Sludge dewatering squeezes and folds spiral shell machine Download PDFInfo
- Publication number
- CN112408740A CN112408740A CN202011066352.9A CN202011066352A CN112408740A CN 112408740 A CN112408740 A CN 112408740A CN 202011066352 A CN202011066352 A CN 202011066352A CN 112408740 A CN112408740 A CN 112408740A
- Authority
- CN
- China
- Prior art keywords
- shell
- plate
- sludge
- fixedly mounted
- rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000010802 sludge Substances 0.000 title claims abstract description 63
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 46
- 238000010009 beating Methods 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 8
- 238000007790 scraping Methods 0.000 claims description 8
- 238000011001 backwashing Methods 0.000 claims description 7
- 239000010865 sewage Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/125—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using screw filters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
- B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
- B02C18/08—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within vertical containers
- B02C18/12—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within vertical containers with drive arranged below container
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Food Science & Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention belongs to the field of screw folding machines, in particular to a sludge dewatering squeezing screw folding machine, which aims at the problem that the sludge at an outlet is not convenient to crush when the existing screw folding machine is used, so that the sludge is difficult to discharge, and the invention provides the following scheme that the sludge dewatering squeezing screw folding machine comprises a shell, wherein a motor is fixedly arranged on one side of the shell, a spiral feeding rod is fixedly arranged on an output shaft of the motor, a sludge outlet is formed in the shell, a water outlet is formed in the shell, a filter screen is fixedly arranged in the water outlet, an annular plate is rotatably arranged at the bottom of the shell, a transverse plate is fixedly arranged on the inner side of the annular plate, a scraper plate is fixedly arranged at the top of the transverse plate, one side of the scraper plate is in contact with the inner wall of the sludge outlet, and a fixed rod is fixedly arranged at the top of the transverse plate. Simultaneously, sewage can be filtered and collected, and the device is simple in structure and convenient to use.
Description
Technical Field
The invention relates to the technical field of screw folding machines, in particular to a sludge dewatering squeezing screw folding machine.
Background
The spiral shell stacking machine is common sludge dewatering equipment, is stable in operation due to low sludge water content, has the characteristics of low energy consumption, relatively simple control and management, convenience in maintenance and the like, and is popular.
When the existing screw stacking machine is used, the sludge at an outlet is not convenient to crush, so that the sludge is difficult to discharge, and therefore, a sludge dewatering squeezing screw stacking machine is provided for solving the problems.
Disclosure of Invention
The invention aims to solve the problem that sludge is difficult to discharge due to the fact that sludge at an outlet is inconvenient to crush when a screw stacking machine is used in the prior art, and provides a sludge dewatering and pressing screw stacking machine.
In order to achieve the purpose, the invention adopts the following technical scheme:
a sludge dewatering squeezing and screw folding machine comprises a shell, wherein a motor is fixedly mounted on one side of the shell, a spiral feeding rod is fixedly mounted on an output shaft of the motor, a sludge outlet is formed in the shell, a water outlet is formed in the shell, a filter screen is fixedly mounted in the water outlet, an annular plate is rotatably mounted at the bottom of the shell, a transverse plate is fixedly mounted on the inner side of the annular plate, a scraping plate is fixedly mounted at the top of the transverse plate, one side of the scraping plate is in contact with the inner wall of the sludge outlet, a fixing rod is fixedly mounted at the top of the transverse plate, a plurality of blades are fixedly mounted on the outer side of the fixing rod, a first gear is fixedly mounted on the outer side of the annular plate in a sleeved mode, a second gear is meshed with the first gear, one end of a transmission rod is fixedly mounted at one end of the spiral feeding rod, the other end of the transmission, the water pump is characterized in that a vertical rod is fixedly mounted at the bottom of the second bevel gear, the outer side of the vertical rod is fixedly connected with the inner ring of the second gear, a filter hopper is fixedly mounted at the bottom of the shell, a filter screen is fixedly mounted in the filter hopper, the bottom of the filter hopper is fixedly communicated with one end of a pipeline, the other end of the pipeline is fixedly communicated with a water tank, the bottom of the shell is fixedly communicated with a back flush nozzle, a water pump is fixedly connected to one side of the water tank, a water outlet of the water pump is fixedly communicated with a tee joint, one ends of two water pipes are fixedly connected to the tee joint, and the other ends of the two water pipes.
Preferably, two supporting plates are fixedly mounted on the outer side of the shell, a beating rod is slidably mounted on one of the two supporting plates, and the beating rod is matched with the filtering hopper.
Preferably, the bottom of the shell is slidably provided with a sliding plate, and one side of the sliding plate is fixedly connected with the striking rod.
Preferably, one end of a spring is fixedly mounted on one side of the sliding plate, and the other end of the spring is fixedly connected with the supporting plate.
Preferably, the outer side of the annular plate is fixedly sleeved with a cam, and the outer side of the cam is in contact with one side of the sliding plate.
Preferably, the annular connecting groove has been seted up to the bottom of casing, and slidable mounting has two connecting blocks in the annular connecting groove, the bottom of two connecting blocks all with the top fixed connection of annular plate, and the annular spacing groove has been seted up to the inner wall of annular connecting groove, and the equal fixed mounting in the outside of two connecting blocks has the stopper, the inner wall sliding connection of stopper and annular spacing groove.
Preferably, two bearings are fixedly mounted on one side of the shell, and inner rings of the two bearings are fixedly connected with the outer sides of the vertical rods.
Preferably, the top of casing is equipped with the feeder hopper, all is equipped with the solenoid valve on two raceway, and the casing includes two dustcoats, and two dustcoats pass through bolt fixed connection.
Compared with the prior art, the invention has the beneficial effects that:
when the scheme is used, sludge with water enters the shell from the feed hopper, the spiral feeding rod is driven to rotate by the motor, the spiral feeding rod extrudes the sludge and pushes the sludge rightwards, water in the sludge enters the filter hopper through the filter screen, and then enters the water tank after being filtered by the filter screen, and the sludge is discharged from the sludge outlet;
according to the scheme, the spiral feeding rod drives the transmission rod to rotate, the transmission rod drives the first bevel gear to rotate, the first bevel gear drives the second bevel gear to rotate, the second bevel gear drives the vertical rod to rotate, the vertical rod drives the second gear to rotate, the second gear drives the first gear to rotate, the first gear drives the annular plate to rotate, the annular plate drives the transverse plate to rotate, the transverse plate drives the fixing rod to rotate, the fixing rod drives the blade to rotate, the blade crushes sludge, the sludge is discharged smoothly, and meanwhile, the transverse plate drives the scraper to scrape the sludge on the inner wall of the sludge outlet;
according to the scheme, the annular plate drives the cam to rotate, the cam rotates to extrude the sliding plate, the sliding plate drives the beating rod to move, the sliding plate is reset through the spring, the beating rod continuously beats the filter hopper, the filter screen in the filter hopper is vibrated, and the filtering speed is increased;
according to the scheme, the electromagnetic valve is opened, water is pumped by the water pump, and is sprayed out by the two backwashing spray heads to backwash the filter screen, so that blockage is avoided;
the sludge scraping device is convenient for crushing sludge, enables the sludge to be smoothly discharged, can scrape the sludge on the inner wall of the sludge outlet, can filter and collect sewage, and is simple in structure and convenient to use.
Drawings
FIG. 1 is a schematic structural diagram of a sludge dewatering and pressing screw folding machine provided by the invention;
FIG. 2 is a schematic structural diagram of part A of a sludge dewatering press screw folding machine provided by the invention;
FIG. 3 is a schematic structural diagram of part B of a sludge dewatering press screw folding machine according to the present invention;
FIG. 4 is a schematic top view of a part of a sludge dewatering press screw stacking machine according to the present invention;
fig. 5 is a schematic side view of a housing of a sludge dewatering press screw folding machine according to the present invention.
In the figure: the device comprises a shell 1, a motor 2, a screw feeding rod 3, a sludge outlet 4, an annular plate 5, a transverse plate 6, a fixing rod 7, a blade 8, a scraping plate 9, a vertical rod 10, a second gear 11, a first gear 12, a cam 13, a second bevel gear 14, a first bevel gear 15, a transmission rod 16, a sliding plate 17, a beating rod 18, a spring 19, a water outlet 20, a filter screen 21, a feed hopper 22, a back washing nozzle 23, a filter hopper 24, a filter screen 25 and a water tank 26.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-5, a sludge dewatering squeezing and screw folding machine comprises a shell 1, a motor 2 is fixedly installed on one side of the shell 1, a spiral feeding rod 3 is fixedly installed on an output shaft of the motor 2, a sludge outlet 4 is formed on the shell 1, a water outlet 20 is formed on the shell 1, a filter screen 21 is fixedly installed in the water outlet 20, an annular plate 5 is rotatably installed at the bottom of the shell 1, a transverse plate 6 is fixedly installed on the inner side of the annular plate 5, a scraping plate 9 is fixedly installed at the top of the transverse plate 6, one side of the scraping plate 9 is in contact with the inner wall of the sludge outlet 4, a fixing rod 7 is fixedly installed at the top of the transverse plate 6, a plurality of blades 8 are fixedly installed on the outer side of the fixing rod 7, a first gear 12 is fixedly sleeved on the outer side of the annular plate 5, a second gear 11 is meshed with the first gear 12, one end of a transmission rod 16 is fixedly installed at one end of, the first bevel gear 15 is engaged with the second bevel gear 14, the bottom of the second bevel gear 14 is fixedly provided with a vertical rod 10, the outer side of the vertical rod 10 is fixedly connected with the inner ring of the second gear 11, the bottom of the shell 1 is fixedly provided with a filter hopper 24, a filter screen 25 is fixedly arranged in the filter hopper 24, the bottom of the filter hopper 24 is fixedly communicated with one end of a pipeline, the other end of the pipeline is fixedly communicated with a water tank 26, the bottom of the shell 1 is fixedly communicated with a back washing nozzle 23, one side of the water tank 26 is fixedly connected with a water pump, a water outlet of the water pump is fixedly communicated with a tee joint, one ends of two water conveying pipes are fixedly connected to the tee joint, and the other ends of the two water conveying pipes.
In the invention, two support plates are fixedly arranged on the outer side of the shell 1, a beating rod 18 is slidably arranged on one of the two support plates, and the beating rod 18 is matched with a filter hopper 24.
In the invention, a sliding plate 17 is slidably mounted at the bottom of the shell 1, one side of the sliding plate 17 is fixedly connected with a striking rod 18, and the sliding plate 17 drives the striking rod 18 to move.
In the invention, one end of a spring 19 is fixedly arranged on one side of the sliding plate 17, the other end of the spring 19 is fixedly connected with the supporting plate, and the spring 19 resets the sliding plate 17.
In the invention, the outer side of the annular plate 5 is fixedly sleeved with the cam 13, the outer side of the cam 13 is contacted with one side of the sliding plate 17, and the cam 13 rotates to press the sliding plate 17 to move horizontally.
In the invention, the bottom of the shell 1 is provided with an annular connecting groove, two connecting blocks are slidably mounted in the annular connecting groove, the bottoms of the two connecting blocks are fixedly connected with the top of the annular plate 5, the inner wall of the annular connecting groove is provided with an annular limiting groove, the outer sides of the two connecting blocks are fixedly provided with limiting blocks, and the limiting blocks are slidably connected with the inner wall of the annular limiting groove.
In the invention, two bearings are fixedly arranged on one side of the shell 1, inner rings of the two bearings are fixedly connected with the outer side of the vertical rod 10, and the bearings enable the vertical rod 10 to stably rotate.
In the invention, the top of the shell 1 is provided with a feed hopper 22, the two water pipes are respectively provided with an electromagnetic valve, the shell 1 comprises two outer covers which are fixedly connected through bolts and can be detached.
In the invention, when in use, sludge with water enters the shell 1 from the feed hopper 22, the screw feeding rod 3 is driven to rotate by the motor 2, the screw feeding rod 3 extrudes and pushes the sludge to the right, water in the sludge enters the filter hopper 24 through the filter screen 21 and enters the water tank 26 after being filtered by the filter screen 25, the sludge is discharged from the sludge outlet 4, the screw feeding rod 3 drives the transmission rod 16 to rotate, the transmission rod 16 drives the first bevel gear 15 to rotate, the first bevel gear 15 drives the second bevel gear 14 to rotate, the second bevel gear 14 drives the vertical rod 10 to rotate, the vertical rod 10 drives the second gear 11 to rotate, the second gear 11 drives the first gear 12 to rotate, the first gear 12 drives the annular plate 5 to rotate, the annular plate 5 drives the transverse plate 6 to rotate, the fixing rod 6 drives the fixing rod 7 to rotate, the fixing rod 7 drives the blade 8 to rotate, and the blade 8 crushes the sludge, the sludge is smoothly discharged, meanwhile, the transverse plate 6 drives the scraper plate 9 to scrape off the sludge on the inner wall of the sludge outlet 4, the annular plate 5 drives the cam 13 to rotate, the cam 13 rotates and extrudes the sliding plate 17, the sliding plate 17 drives the beating rod 18 to move, the sliding plate 17 is reset through the spring 19, the beating rod 18 continuously beats the filter hopper 24, the filter screen 25 in the filter hopper 24 is vibrated, the filtering speed is accelerated, the electromagnetic valve is opened, water is extracted through the water pump, the water is sprayed out by the two backwashing nozzles 23, and backwashing is carried out on the filter screen 21 to avoid blockage.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. The sludge dewatering squeezing and screw folding machine comprises a shell (1) and is characterized in that a motor (2) is fixedly mounted on one side of the shell (1), a spiral feeding rod (3) is fixedly mounted on an output shaft of the motor (2), a sludge outlet (4) is formed in the shell (1), a water outlet (20) is formed in the shell (1), a filter screen (21) is fixedly mounted in the water outlet (20), a ring-shaped plate (5) is rotatably mounted at the bottom of the shell (1), a transverse plate (6) is fixedly mounted on the inner side of the ring-shaped plate (5), a scraping plate (9) is fixedly mounted at the top of the transverse plate (6), one side of the scraping plate (9) is in contact with the inner wall of the sludge outlet (4), a fixing rod (7) is fixedly mounted at the top of the transverse plate (6), a plurality of blades (8) are fixedly mounted on the outer side of the fixing rod (7), and a first gear (12, a second gear (11) is meshed on the first gear (12), one end of a transmission rod (16) is fixedly mounted at one end of the spiral feeding rod (3), the other end of the transmission rod (16) extends to the outer side of the shell (1) and is fixedly mounted with a first bevel gear (15), a second bevel gear (14) is meshed on the first bevel gear (15), a vertical rod (10) is fixedly mounted at the bottom of the second bevel gear (14), the outer side of the vertical rod (10) is fixedly connected with the inner ring of the second gear (11), a filtering hopper (24) is fixedly mounted at the bottom of the shell (1), a filtering screen (25) is fixedly mounted in the filtering hopper (24), one end of a pipeline is fixedly communicated with the bottom of the filtering hopper (24), a water tank (26) is fixedly communicated with the other end of the pipeline, and a back-washing nozzle (23) is fixedly communicated with the bottom of the shell (1), one side of the water tank (26) is fixedly connected with a water pump, a water outlet of the water pump is fixedly communicated with a tee joint, one ends of two water pipes are fixedly connected to the tee joint, and the other ends of the two water pipes are respectively and fixedly communicated with the two back washing nozzles (23).
2. The sludge dewatering squeezing and screw overlapping machine according to claim 1, wherein two support plates are fixedly arranged on the outer side of the shell (1), one of the two support plates is provided with a beating rod (18) in a sliding manner, and the beating rod (18) is matched with the filtering hopper (24).
3. The sludge dewatering squeezing and screw overlapping machine according to claim 1, wherein a sliding plate (17) is slidably mounted at the bottom of the shell (1), and one side of the sliding plate (17) is fixedly connected with a striking rod (18).
4. The sludge dewatering squeezing and screw overlapping machine according to claim 3, wherein one end of the spring (19) is fixedly installed on one side of the sliding plate (17), and the other end of the spring (19) is fixedly connected with the supporting plate.
5. The sludge dewatering and pressing screw stacking machine as claimed in claim 1, wherein the outer side of the annular plate (5) is fixedly sleeved with the cam (13), and the outer side of the cam (13) is in contact with one side of the sliding plate (17).
6. The sludge dewatering squeezing and screw folding machine according to claim 1, wherein an annular connecting groove is formed in the bottom of the shell (1), two connecting blocks are slidably mounted in the annular connecting groove, the bottoms of the two connecting blocks are fixedly connected with the top of the annular plate (5), an annular limiting groove is formed in the inner wall of the annular connecting groove, limiting blocks are fixedly mounted on the outer sides of the two connecting blocks, and the limiting blocks are slidably connected with the inner wall of the annular limiting groove.
7. The sludge dewatering and pressing screw folding machine according to claim 1, wherein two bearings are fixedly mounted on one side of the shell (1), and inner rings of the two bearings are fixedly connected with the outer sides of the vertical rods (10).
8. The sludge dewatering and pressing screw folding machine according to claim 1, wherein a feed hopper (22) is arranged at the top of the shell (1), electromagnetic valves are arranged on the two water pipes, and the shell (1) comprises two outer covers which are fixedly connected through bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011066352.9A CN112408740A (en) | 2020-09-30 | 2020-09-30 | Sludge dewatering squeezes and folds spiral shell machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011066352.9A CN112408740A (en) | 2020-09-30 | 2020-09-30 | Sludge dewatering squeezes and folds spiral shell machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112408740A true CN112408740A (en) | 2021-02-26 |
Family
ID=74855411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011066352.9A Withdrawn CN112408740A (en) | 2020-09-30 | 2020-09-30 | Sludge dewatering squeezes and folds spiral shell machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112408740A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118529842A (en) * | 2024-05-30 | 2024-08-23 | 江西省金瑞环保科技有限公司 | A system for treating electrolytic waste liquid in electrolytic copper production process |
| CN120504380A (en) * | 2025-07-22 | 2025-08-19 | 江西理工大学 | Solid-liquid separation device for cadmium-containing wastewater treatment |
-
2020
- 2020-09-30 CN CN202011066352.9A patent/CN112408740A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118529842A (en) * | 2024-05-30 | 2024-08-23 | 江西省金瑞环保科技有限公司 | A system for treating electrolytic waste liquid in electrolytic copper production process |
| CN118529842B (en) * | 2024-05-30 | 2025-09-12 | 江西省金瑞环保科技有限公司 | An electrolytic waste liquid treatment system for electrolytic copper production process |
| CN120504380A (en) * | 2025-07-22 | 2025-08-19 | 江西理工大学 | Solid-liquid separation device for cadmium-containing wastewater treatment |
| CN120504380B (en) * | 2025-07-22 | 2025-09-26 | 江西理工大学 | Solid-liquid separation device for cadmium-containing wastewater treatment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201050927Y (en) | Screw type extruding desiccation machine | |
| CN210229882U (en) | A fast discharging biomass fuel pellet machine | |
| CN207154372U (en) | A kind of garbage dewatering crushes environment-friendly processing unit | |
| CN213708096U (en) | Drum-type solid-liquid separator with material cleaning device | |
| CN112408740A (en) | Sludge dewatering squeezes and folds spiral shell machine | |
| CN109231776B (en) | A continuously operating sludge centrifugal dewatering device | |
| CN217834836U (en) | Compound soybean milk residue squeezing machine | |
| CN217553211U (en) | Extrusion dehydration device is used in hydroxypropyl methyl cellulose processing | |
| CN105384324B (en) | Biogas slurry and biogas residue separation of solid and liquid all-in-one | |
| CN109163511B (en) | Plastic particle centrifugal dehydration device | |
| CN202379774U (en) | Vertical flocculation dehydrator | |
| CN113943053A (en) | Domestic sewage treatment device | |
| CN210816427U (en) | Belt cleaning device is used in herbal pieces-production | |
| CN219292371U (en) | Kitchen garbage innocent treatment equipment | |
| CN112757680A (en) | Kitchen waste material receiving and extruding all-in-one machine | |
| CN213950644U (en) | Sewage treatment spiral deslagging system drainage device | |
| CN211133171U (en) | Spiral filtering washing machine | |
| CN103922558B (en) | A kind of mud filter | |
| CN210974374U (en) | Municipal works sludge treatment equipment | |
| CN210851438U (en) | Self-cleaning structure of squeezer | |
| CN211307490U (en) | Kitchen waste material receiving and extruding all-in-one machine | |
| CN220557331U (en) | Crushing and filtering integrated device for fruit juice production | |
| CN115259608A (en) | Environment-friendly sludge dewatering device for sewage treatment | |
| CN203820615U (en) | Sludge filtering machine | |
| CN222969311U (en) | Cyclone back flushing high-precision filter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210226 |
|
| WW01 | Invention patent application withdrawn after publication |