CN113145668A - Rolling mill process oil way system - Google Patents
Rolling mill process oil way system Download PDFInfo
- Publication number
- CN113145668A CN113145668A CN202010014090.5A CN202010014090A CN113145668A CN 113145668 A CN113145668 A CN 113145668A CN 202010014090 A CN202010014090 A CN 202010014090A CN 113145668 A CN113145668 A CN 113145668A
- Authority
- CN
- China
- Prior art keywords
- process oil
- assembly
- cooling
- rolling mill
- filter
- 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.)
- Pending
Links
- 239000010734 process oil Substances 0.000 title claims abstract description 87
- 238000005096 rolling process Methods 0.000 title claims abstract description 38
- 238000001816 cooling Methods 0.000 claims abstract description 84
- 238000001914 filtration Methods 0.000 claims abstract description 29
- 238000002347 injection Methods 0.000 claims abstract description 28
- 239000007924 injection Substances 0.000 claims abstract description 28
- 239000003921 oil Substances 0.000 claims abstract description 25
- 239000000498 cooling water Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 28
- 238000005097 cold rolling Methods 0.000 abstract description 6
- 230000007547 defect Effects 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000010731 rolling oil Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
- B21B45/0218—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for strips, sheets, or plates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/31—Self-supporting filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
- B01D29/56—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
- B21B45/0233—Spray nozzles, Nozzle headers; Spray systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0239—Lubricating
- B21B45/0245—Lubricating devices
- B21B45/0248—Lubricating devices using liquid lubricants, e.g. for sections, for tubes
- B21B45/0251—Lubricating devices using liquid lubricants, e.g. for sections, for tubes for strips, sheets, or plates
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Metal Rolling (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention belongs to the technical field of cooling of process oil of a cold rolling mill, and discloses a process oil path system of a rolling mill, which comprises a process oil tank, a process oil power assembly and an oil injection assembly, wherein the process oil tank is connected with the process oil power assembly; the rolling mill process oil path system further comprises a filtering assembly arranged between the oil injection assembly and the process oil tank. Compared with the prior art, the invention is provided with two sets of filter units which are mutually independent, the production operation of a rolling mill is not required to be interrupted, the filter element can be replaced in the production process, and the replacement period of the filter element is prolonged. The invention also adds an online cooling assembly and an offline cooling assembly, the offline cooling assembly can effectively make up the defects of the online cooling assembly, an independent offline cooling loop is formed, the online cooling assembly can be independently started or stopped according to the production requirement, the limitation of the production start-stop machine is avoided, and the temperature of the process oil of the rolling mill can meet the production requirement.
Description
Technical Field
The invention belongs to the technical field of cooling of cold rolling mill process oil, and particularly relates to a rolling mill process oil way system.
Background
In the working process of the aluminum plate and strip cold rolling mill, a process oil system of the aluminum plate and strip cold rolling mill needs to be used for continuously conveying process oil for the rolling mill, and normal rolling of the aluminum plate and strip is facilitated. The process oil is continuously conveyed to the rolling mill through the power device through the pipeline, in the working process and in the related technology, the process oil path system of the rolling mill comprises a set of filtering system, when the pressure of the process oil system is insufficient in the production process, the filter element needs to be frequently replaced (3 times per week), 1 more oil purification pumps are arranged, and other measures are taken to marginally meet the production requirement, but when the production efficiency is high, the problem of insufficient pressure of the process oil system becomes more prominent, the requirements cannot be met through the existing mode, the process oil flow is abnormal due to insufficient pressure, the shape of the rolling oil is abnormal, and bad plate shapes are generated.
Therefore, there is a need to provide a new rolling mill process oil circuit system to solve the above technical problems.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a rolling mill process oil way system capable of effectively controlling the pressure of a process oil system.
In order to solve the technical problem, the invention provides a rolling mill process oil path system which comprises a process oil tank, a process oil power assembly and an oil injection assembly, wherein the process oil tank is connected with the process oil power assembly; the rolling mill process oil path system also comprises a filtering assembly arranged between the oil injection assembly and the process oil tank; the filter assembly comprises a first filter unit and a second filter unit which are arranged in parallel.
Preferably, the first filtering unit comprises a first filtering valve, a first filter and a second filtering valve which are communicated in sequence.
Preferably, the second filter unit has the same structure as the first filter unit.
Preferably, the first filter valve and the second filter valve are both pneumatic valves.
Preferably, the filter assembly further comprises a reducing straight joint arranged between the first filter unit and the second filter unit.
Preferably, an online cooling assembly is arranged between the filtering assembly and the oil injection assembly, the online cooling assembly comprises a first branch and a second branch which are connected in parallel, and a first cooling valve and a first cooler which are connected in series are arranged on the first branch; a third cooling valve is arranged on the second branch; the process oil tank, the process oil power assembly, the on-line cooling assembly and the oil injection assembly form a process oil external circulation working loop together.
Preferably, the first branch is further provided with a second cooling valve, and the first cooling valve, the first cooler and the second cooling valve are sequentially connected in series; the first cooler is a plate cooler.
Preferably, the rolling mill process oil circuit system further comprises an offline cooling assembly, and the offline cooling assembly comprises a cooling pump, a second cooler, a cooling water system and an electric control system which together form an offline cooling loop.
Preferably, the off-line cooling module and the on-line cooling module have the same structure.
Preferably, the process oil power assembly is a motor pump set; the oil injection assembly comprises an injection beam and a plurality of nozzles arranged at intervals on the injection beam.
Compared with the prior art, the invention is provided with two sets of filter units which are mutually independent, the production operation of a rolling mill is not required to be interrupted, the filter element can be replaced in the production process, the replacement period of the filter element is prolonged, and the filter element can be replaced once in two months. The invention also adds an online cooling component and an offline cooling component to realize the heat dissipation of the system, the offline cooling component can effectively make up the defects of the online cooling component, an independent offline cooling loop is formed, the online cooling component can be independently started or stopped according to the production requirement and is not limited by the start and stop of the production, and the temperature of the process oil of the rolling mill is ensured to meet the production requirement.
Drawings
FIG. 1 is a schematic diagram of a rolling mill process oil supply system of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
fig. 3 is a partially enlarged view of B in fig. 1.
In the figure:
the device comprises a process oil tank 1, a process oil power assembly 2, an oil injection assembly 3, an online cooling assembly 4, an offline cooling assembly 5, a filtering assembly 6, a rolling mill 7 and an electrical control system 8; the spray beam 31, the nozzle 32, the first cooling valve 41, the first cooler 42, the second cooling valve 43, the third cooling valve 44, the second cooler 51; a first filtering unit 61, a second filtering unit 62, a reducing straight joint 63, a first filtering valve 611, a first filter 612 and a second filtering valve 613.
Detailed Description
The invention is further described with reference to the following figures and embodiments.
Referring to fig. 1-3, the invention provides a rolling mill process oil circuit system, which comprises a process oil tank 1, a process oil power assembly 2 and an oil injection assembly 3, wherein the process oil tank 1 is connected with the process oil power assembly 2, and the process oil power assembly 2 is connected with the oil injection assembly 3; the rolling mill process oil path system further comprises a filtering assembly 6 arranged between the oil injection assembly 3 and the process oil tank 1; the filter assembly 6 comprises a first filter unit 61 and a second filter unit 62 arranged in parallel. The first filtering unit 61 includes a first filtering valve 611, a first filter 612, and a second filtering valve 613, which are connected in sequence. The second filtering unit 62 is identical in structure to the first filtering unit 61. The first filter valve 611 and the second filter valve 613 are both pneumatic valves. The filtering assembly 6 further comprises a reducing straight joint 63 arranged between the first filtering unit 61 and the second filtering unit 62. In the present embodiment: the two filters are operated in parallel, the flow passing capacity of the filters is doubled, the pressure difference of the filters is reduced, and the pressure difference of the newly replaced filter element is only 1 bar. When the production load is small, the production requirement can be met only by starting one oil purification pump, and the energy of the system is saved by about 40%. The invention comprises two sets of filter units, specifically a first filter unit 61 and a second filter unit 62, wherein the two sets of filter units are independent from each other and can be operated simultaneously or independently. Thus, when the filter cartridge needs to be replaced, one filter unit can be shut off by controlling a pneumatic valve in series with the filter. The other filter unit can be subjected to filter cartridge replacement. In the process of replacing the filter element, the production operation of the rolling mill 7 is not required to be interrupted, the filter element can be replaced in the production process, the replacement period of the filter element is prolonged, and the filter element is replaced once in two months.
Further, as another embodiment of the present invention, an in-line cooling module 4 is disposed between the filtering module 6 and the oil injection module 3, the in-line cooling module 4 includes a first branch and a second branch connected in parallel, and the first branch is provided with a first cooling valve 41 and a first cooler 42 connected in series; a third cooling valve 44 is arranged on the second branch; the process oil tank 1, the process oil power assembly 2, the online cooling assembly 4 and the oil injection assembly 3 form a process oil external circulation working loop together. A second cooling valve 43 is further arranged on the first branch, and the first cooling valve 41, the first cooler 42 and the second cooling valve 43 are sequentially connected in series; the first cooler 42 is a plate cooler. The off-line cooling module 5 is identical in structure to the on-line cooling module 4. More specifically, the process oil power assembly 2 is a motor-pump assembly. The fuel injection assembly 3 comprises an injection beam 31 and a plurality of nozzles 32 arranged at intervals on the injection beam 31. The nozzle 32 is disposed opposite to the rolling mill 7. The rolling mill process oil supply system also comprises a filter assembly 6 arranged between the oil injection assembly 3 and the online cooling assembly 4.
In this embodiment, the process oil power module 2 is used to provide power to deliver process oil from the oil tank to the oil injection module 3. By controlling the opening or closing of the first cooling valve 41, the second cooling valve 43 and said third cooling valve 44, the passage or non-passage of the process oil through the first cooler 42 can be controlled. Therefore, whether the process oil passes through the first cooler 42 or not can be flexibly controlled, and the oil temperature of the process oil can be flexibly controlled. The filtering component 6 is used for filtering the process oil, and the cleanness of the process oil is ensured. Specifically, the rolling mill process oil supply system further comprises an offline cooling assembly 5, wherein the offline cooling assembly 5 comprises a cooling pump, a second cooler 51, a cooling water system and an electrical control system 8 which together form an offline cooling circuit. Namely, the off-line cooling component 5 comprises 1 cooling pump, 1 cooler, a cooling water system and an electrical control system 8, an independent circulating cooling system is formed, the problems of cold rolling friction and large heat productivity of the wide-specification aluminum plate strip are solved, and the cooling component is independently cooled and is not limited by production start-stop. During the use, when the process oil temperature appears in the production process and exceeds the standard, operating personnel in time starts off-line cooling module 5 at control interface, and original on-line cooling module 4 is according to the settlement temperature, and automatically regulated control by temperature change proportional control valve guarantees that actual temperature is unanimous with the demand temperature. When the ambient temperature is lower than 15 ℃, the operator stops the off-line cooling component 5 according to the standard, so that the energy is saved and the consumption is reduced. In the invention, the offline cooling assembly 5 effectively makes up the defects of the online cooling assembly 4, the special loop is used for circulating cooling, the limitation of production start-up and shutdown is avoided, the cooling system is independently started or stopped according to production requirements, and after an independent circulating cooling system is added, the process oil temperature of the aluminum plate strip 1850 cold rolling mill is controlled within 35 ℃, so that the production requirements are met.
It should be noted that, the rolling mill process oil supply system of the present invention has been tested in one rolling mill, the test effect is feasible, and the present invention has been popularized to other rolling mills. At present, process oil supply of all rolling mills is normal, two filters run in parallel, the flow capacity of the filters is doubled, the pressure difference of the filters is reduced, and the technical problems mentioned in the background technology are effectively solved. The process oil temperature of the aluminum plate and strip rolling mill is controlled within 35 ℃, and the production requirement is met.
In particular, the offline cooling module 5 and the online cooling module 4 may be configured in the same structure.
Compared with the prior art, the invention is provided with two sets of filter units which are mutually independent, the production operation of a rolling mill is not required to be interrupted, the filter element can be replaced in the production process, the replacement period of the filter element is prolonged, and the filter element can be replaced once in two months. The invention also adds an online cooling component and an offline cooling component to realize the heat dissipation of the system, the offline cooling component can effectively make up the defects of the online cooling component, an independent offline cooling loop is formed, the online cooling component can be independently started or stopped according to the production requirement and is not limited by the start and stop of the production, and the temperature of the process oil of the rolling mill is ensured to meet the production requirement.
While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.
Claims (10)
1. A rolling mill process oil path system comprises a process oil tank, a process oil power assembly and an oil injection assembly, wherein the process oil tank is connected with the process oil power assembly, and the process oil power assembly is connected with the oil injection assembly; the rolling mill process oil path system is characterized by further comprising a filtering assembly arranged between the oil injection assembly and the process oil tank; the filter assembly comprises a first filter unit and a second filter unit which are arranged in parallel.
2. The rolling mill process oil circuit system of claim 1, wherein the first filtering unit comprises a first filtering valve, a first filter and a second filtering valve which are communicated in sequence.
3. The mill process oil circuit system of claim 2, wherein the second filter unit is identical in structure to the first filter unit.
4. The mill process oil circuit system of claim 3, wherein the first and second filter valves are both pneumatic valves.
5. The mill process oil circuit system of claim 4, wherein the filter assembly further comprises a reducing straight joint disposed between the first filter unit and the second filter unit.
6. The rolling mill process oil circuit system according to any one of claims 1 to 5, wherein an online cooling assembly is arranged between the filtering assembly and the oil injection assembly, the online cooling assembly comprises a first branch and a second branch which are connected in parallel, and a first cooling valve and a first cooler are arranged on the first branch in series; a third cooling valve is arranged on the second branch; the process oil tank, the process oil power assembly, the on-line cooling assembly and the oil injection assembly form a process oil external circulation working loop together.
7. The rolling mill process oil circuit system according to claim 6, wherein a second cooling valve is further arranged on the first branch, and the first cooling valve, the first cooler and the second cooling valve are sequentially connected in series; the first cooler is a plate cooler.
8. The mill process oil gallery system of claim 7, further comprising an offline cooling assembly including a cooling pump, a secondary cooler, a cooling water system, and an electrical control system that collectively form an offline cooling circuit.
9. The mill process oil circuit system of claim 8, wherein the offline cooling assembly is structurally identical to the online cooling assembly.
10. The mill process oil circuit system of claim 9, wherein the process oil power assembly is a motor-pump stack; the oil injection assembly comprises an injection beam and a plurality of nozzles arranged at intervals on the injection beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010014090.5A CN113145668A (en) | 2020-01-07 | 2020-01-07 | Rolling mill process oil way system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010014090.5A CN113145668A (en) | 2020-01-07 | 2020-01-07 | Rolling mill process oil way system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113145668A true CN113145668A (en) | 2021-07-23 |
Family
ID=76881712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010014090.5A Pending CN113145668A (en) | 2020-01-07 | 2020-01-07 | Rolling mill process oil way system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113145668A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101497936A (en) * | 2009-03-12 | 2009-08-05 | 上海交通大学 | On-line and off-line combined quenching refrigerating device after steel rolling |
| CN202381963U (en) * | 2011-11-11 | 2012-08-15 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Lubrication bypass circulatory system for rolling mill |
| CN105921535A (en) * | 2016-07-12 | 2016-09-07 | 北京科技大学 | Plate strip steel controlled cooling ultradense cooler |
| CN106641213A (en) * | 2016-12-29 | 2017-05-10 | 中车株洲电力机车研究所有限公司 | Method for controlling filtration of lubricating oil for main gear box of wind turbine generator set |
| CN107971344A (en) * | 2016-10-25 | 2018-05-01 | 宝山钢铁股份有限公司 | The Basic automation control system and control method of steel pipe on-line cooling |
-
2020
- 2020-01-07 CN CN202010014090.5A patent/CN113145668A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101497936A (en) * | 2009-03-12 | 2009-08-05 | 上海交通大学 | On-line and off-line combined quenching refrigerating device after steel rolling |
| CN202381963U (en) * | 2011-11-11 | 2012-08-15 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Lubrication bypass circulatory system for rolling mill |
| CN105921535A (en) * | 2016-07-12 | 2016-09-07 | 北京科技大学 | Plate strip steel controlled cooling ultradense cooler |
| CN107971344A (en) * | 2016-10-25 | 2018-05-01 | 宝山钢铁股份有限公司 | The Basic automation control system and control method of steel pipe on-line cooling |
| CN106641213A (en) * | 2016-12-29 | 2017-05-10 | 中车株洲电力机车研究所有限公司 | Method for controlling filtration of lubricating oil for main gear box of wind turbine generator set |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2001234756A (en) | Gas turbine | |
| JP5600263B2 (en) | Condenser for power plant | |
| CN111472853B (en) | Auxiliary machine cooling water system of gas-steam combined cycle unit | |
| CN112160907B (en) | Screw air compressor system of water lubrication bearing and control method thereof | |
| KR20090068290A (en) | Variable fuel pressure control for a fuel cell | |
| CN112324759A (en) | Shield machine oil tank water cooling system and shield machine oil tank water cooling control method | |
| US9057327B2 (en) | Method and apparatus for heating liquid fuel supplied to a gas turbine combustor | |
| EP3067534A1 (en) | Gas turbine engine fuel-oil heat exchange system | |
| CN113145668A (en) | Rolling mill process oil way system | |
| CN216694160U (en) | Self-adjusting power-saving heating temperature control device | |
| CN113145669A (en) | Rolling mill process oil supply system | |
| CN214887387U (en) | Cooling water system for cooling air of turbine of gas turbine | |
| CN110597173B (en) | Main transformer cooling control method | |
| Shinde et al. | Energy saving through air compressor system automation | |
| RU2597486C2 (en) | Method of reducing power consumption of rolling plant, control and/or regulation device for rolling plant, computer-readable program code, data storage medium, as well as rolling plant | |
| CN220394014U (en) | Heat medium circulation system | |
| CN212028242U (en) | Hydraulic oil refrigerator | |
| CN210692296U (en) | Main transformer cooling control system | |
| CN213818699U (en) | Cabinet type liquid cooling heat exchanger unit | |
| CN219046608U (en) | Combined cooling system | |
| CN217653002U (en) | Cooling water optimization system of EH oil cooler | |
| CN220670137U (en) | Tunnel type sterilizing dryer heating section cooling system and tunnel type sterilizing dryer | |
| CN214746687U (en) | Modularized process cooling water station | |
| CN114992015B (en) | Ammonia fuel supply system and control method | |
| CN219571900U (en) | Feed pump system and thermal generator set |
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 | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20210723 |