CN112492809A - Explosion-proof electrical control box - Google Patents
Explosion-proof electrical control box Download PDFInfo
- Publication number
- CN112492809A CN112492809A CN202011402723.6A CN202011402723A CN112492809A CN 112492809 A CN112492809 A CN 112492809A CN 202011402723 A CN202011402723 A CN 202011402723A CN 112492809 A CN112492809 A CN 112492809A
- Authority
- CN
- China
- Prior art keywords
- box body
- explosion
- fire extinguishing
- oil groove
- sealing
- 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- Withdrawn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
- 238000007789 sealing Methods 0.000 claims abstract description 80
- 239000007921 spray Substances 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 18
- 230000002093 peripheral effect Effects 0.000 claims abstract description 8
- 239000002390 adhesive tape Substances 0.000 claims description 11
- 238000004891 communication Methods 0.000 claims description 6
- 238000010030 laminating Methods 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 3
- 239000011229 interlayer Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 4
- 238000004880 explosion Methods 0.000 abstract description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000005489 elastic deformation Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/06—Hermetically-sealed casings
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/02—Nozzles specially adapted for fire-extinguishing
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/36—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0217—Mechanical details of casings
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/06—Hermetically-sealed casings
- H05K5/069—Other details of the casing, e.g. wall structure, passage for a connector, a cable, a shaft
Landscapes
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The invention discloses an explosion-proof electrical control box, and belongs to the technical field of electrical control equipment. The control box comprises a sealing seat, a sealing cover and a box body, wherein a fire extinguishing device is fixedly arranged on the top end of the box body, the fire extinguishing device comprises a fire extinguishing container which is used for containing fire extinguishing materials and is positioned on the top surface of the box body, the fire extinguishing container is communicated with a spray head positioned on the top in the box body through a circulating pipeline, and when an external detection device detects that the environment in the box body changes, the fire extinguishing materials in the fire extinguishing container are sprayed out, so that the environment in the box body is improved, explosion or fire is avoided, and the overall safety of the explosion-proof box body is enhanced; the pretreatment device is positioned on the outer peripheral side of the box body and comprises a vacuum pump capable of extracting air in the box body to the outer side of the sealing cover in a one-way mode, the safety of the explosion-proof box can be enhanced, and potential safety hazards caused by faults of the explosion-proof box are avoided.
Description
Technical Field
The invention relates to an electrical control box, in particular to an explosion-proof electrical control box, and belongs to the technical field of electrical control equipment.
Background
The electric control box is a device which comprises one or more low-voltage switch devices and related control, measurement, signal, protection, regulation and other components, and is mainly used for industrial device control, market office and other occasions. The common explosion-proof electrical control box in the prior art adopts a sealing oil groove to arrange the base in a sealing manner, but the explosion-proof electrical control box still has some potential safety hazards and defects. For example, when the sealing cover needs to be taken out of the oil tank during disassembly, assembly and maintenance, a large amount of sealing oil can be adhered to the part of the sealing cover immersed in the oil tank, and if the sealing cover is not taken properly, the sealing oil can drip everywhere; in addition, although the detection device and the alarm device installed in the existing electrical control box can detect the environmental abnormality in the box body in time and warn the abnormal environment in the box body, the staff still has great potential safety hazard when opening the box body for maintenance and inspection.
Disclosure of Invention
The invention aims to provide an explosion-proof electrical control box to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
an explosion-proof electrical control box comprises a sealing seat, a sealing cover and a box body, wherein the sealing cover is fixedly clamped on the sealing seat in a sealing manner, the box body is fixedly clamped on the sealing seat and positioned in the sealing cover, a fire extinguishing device is fixedly arranged on the top end of the box body, and the fire extinguishing device comprises a fire extinguishing container which is used for containing fire extinguishing materials and is positioned on the top surface of the box body; a circulation pipeline communicated with the interior of the fire extinguishing container is arranged on the top surface of the box body, and a plurality of uniformly distributed spray heads are arranged at one end of the circulation pipeline positioned in the box body; and a pretreatment device is positioned on the outer peripheral side of the box body and comprises a vacuum pump capable of unidirectionally pumping air in the box body to the outer side of the sealing cover.
As a still further scheme of the invention:
the vacuum pump is fixedly arranged on the peripheral side wall of the box body, an air exhaust pipe is fixedly arranged at the air exhaust end of the vacuum pump, and the other end of the air exhaust pipe penetrates through the box body and extends into the box body; and the output end of the vacuum pump is fixedly provided with an air outlet pipe, and the other end of the air outlet pipe penetrates through the sealing cover and extends to the outer side of the sealing cover.
As a still further scheme of the invention:
and a one-way valve is fixed on the output end of the air outlet pipe in a threaded manner.
As a still further scheme of the invention:
the top surface of the box body is provided with a communication hole which is communicated with the fire extinguishing container and the circulating pipeline.
As a still further scheme of the invention:
the spray heads are formed on the inner side of the top surface of the box body, and the spray heads are communicated with the circulating pipeline.
As a still further scheme of the invention:
the sealing seat is provided with an oil groove matched with the sealing cover, and the bottom end of the sealing cover is clamped and fixed in the oil groove in a sealing manner; the sealing seat is located the inboard department of oil groove set firmly with box assorted mount pad, the bottom block of box is fixed in on the mount pad.
As a still further scheme of the invention:
all the bonding is fixed with an adhesive tape that is double-deck composite construction on two inside walls that the oil groove is relative, and this adhesive tape is including laminating in the sealing of oil groove inside wall lower half and laminating in the clearance portion of oil groove inside wall upper half, this sealing and clearance portion integrated into one piece.
As a still further scheme of the invention:
the top of clearance portion with the top entry of oil groove flushes, and the top of this clearance portion extends along the horizontal direction and forms the portion of covering, and this portion of covering can cover the notch that covers the oil groove.
As a still further scheme of the invention:
the inside of oil groove has filled the sealing oil, just the bottom block of sealed cowling sets firmly between the sealing of two adhesive tapes in the oil groove.
As a still further scheme of the invention:
an interlayer for filling sand materials is arranged in the box body.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the oil groove cleaning device, a circle of rubber strip containing a sealing part, a cleaning part and a covering part is additionally arranged at the inlet of the top end of the oil groove, the rubber strip is made of materials with elasticity such as silica gel or rubber, the covering part forms a one-way notch by utilizing the elasticity of the covering part, and when no external force is used for extrusion, the covering part can cover and cover the notch of the oil groove, so that dust or magazines are prevented from falling into the oil groove; when the sealing cover is installed, the elastic deformation of the material is utilized to extrude the sealing parts on the two side surfaces of the oil groove, so that the sealing effect can be achieved, and the sealing oil in the oil groove can be protected when the sealing cover is opened; the cleaning part at the upper end can clean dust impurities or sealing oil stains attached to the surface of the sealing cover 2 when the sealing cover 2 is inserted or taken out, so that the use stability is enhanced;
2. the top of the box body is also provided with a fire extinguishing container, fire extinguishing materials are filled in the fire extinguishing container, the inside of the box body is provided with a spray head, the output end of the fire extinguishing container is connected with the spray head, and when an external detection device detects that the environment (temperature, humidity and gas concentration) in the box body changes, the fire extinguishing materials in the fire extinguishing container are sprayed out through the spray head to improve the environment in the box body, so that explosion or fire is avoided, and the overall safety of the explosion-proof box body is enhanced;
3. the invention not only is provided with an explosion-proof structure, but also is additionally provided with a pretreatment device, the safety of the explosion-proof box is further enhanced by double combination, the potential safety hazard caused by the failure of the explosion-proof box is avoided, the pretreatment device adopts a vacuum pump, and when the internal detection device detects the abnormal environment in the box body, the vacuum pump can be opened to pump the interior of the box body into a vacuum state, so that a box body environment which is not easy to explode is manufactured.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a partial sectional view of the case of the present invention;
FIG. 3 is a schematic axial view of the seal holder of the present invention
Fig. 4 is an enlarged detail view of a part a of fig. 1.
In the figure:
1. a sealing seat; 11. an oil sump; 12. a mounting seat; 13. an adhesive tape;
2. a sealing cover; 21. an inflation inlet;
3. a box body; 301. a communicating hole; 31. an interlayer;
4. a fire extinguishing device; 41. a fire extinguishing container; 42. a flow conduit; 43. a spray head;
5. a pretreatment device; 51. a vacuum pump; 52. an air exhaust pipe; 53. an air outlet pipe; 54. a one-way valve.
Detailed Description
Referring to fig. 1 to 4, an explosion-proof electrical control box is described in detail in this embodiment. This explosion-proof type electrical apparatus includes seal receptacle 1, sealed cowling 2 and box 3, and 2 sealed block of sealed cowling set firmly on seal receptacle 1, and 3 blocks of box are fixed in on the seal receptacle 1 and are located the inside of sealed cowling 2.
The specific arrangement mode of the sealing cover 2 is as follows: an oil groove 11 matched with the sealing cover is formed in the sealing seat 1, and the bottom end of the sealing cover 2 is clamped and fixed in the oil groove in a sealing mode. The sealing cover 2 is fixed in a sealing and clamping way as follows: all the bonding is fixed with one and is double-deck composite construction's adhesive tape 13 on 11 relative two inside walls of oil groove, and this adhesive tape is including laminating in the sealing of oil groove inside wall lower half and laminating in the clearance portion of oil groove inside wall first, this sealing and clearance portion integrated into one piece. Wherein the top of clearance portion with the top entry of oil groove flushes, and the top of this clearance portion extends along the horizontal direction and forms the portion of covering, and this portion of covering can cover the notch that covers the oil groove. The rubber strip with the sealing part, the cleaning part and the covering part is additionally arranged at the inlet of the top end of the oil groove, the rubber strip is made of materials with elasticity such as silica gel or rubber, the covering part forms a one-way notch by utilizing the elasticity of the covering part, and when no external force is used for extrusion, the covering part can cover the notch of the oil groove to prevent dust or magazines from falling into the oil groove; when the sealing cover is installed, the elastic deformation of the material is utilized to extrude the sealing parts on the two side surfaces of the oil groove, so that the sealing effect can be achieved, and the sealing oil in the oil groove can be protected when the sealing cover is opened; the cleaning part at the upper end can clean dust impurities or sealing oil stains attached to the surface of the sealing cover 2 when the sealing cover 2 is inserted or taken out, and the use stability is enhanced.
The inside of oil groove 11 is filled with sealing oil, and the bottom block of sealed cowling sets firmly between the clearance adhesive tape of two adhesive tapes in the oil groove, and the use of sealing oil can make sealed effect of sealed cowling 2 better stronger. Further, an air charging port 21 is formed on the outer side of the peripheral wall of the seal cover 2.
The specific setting mode of the box body 3 is as follows: the inboard department that lies in the oil groove on the seal receptacle 1 sets firmly with box assorted mount pad 12, on the bottom block of box 3 was fixed in the mount pad. Furthermore, the interior of the box 3 is provided with a barrier 31 for a sand-filled material, which ensures that the surrounding explosive mixture will not ignite in the event of an arc, a flame, overheating of the housing wall or of the surface of the sand material in the box under the conditions of intended use.
A fire extinguishing device 4 is fixedly arranged on the top end of the box body 3. The fire extinguishing apparatus includes a fire extinguishing container 41 for containing fire extinguishing material and located on the top surface of the case, a flow pipe 42 communicating with the inside of the fire extinguishing container 41 is provided on the top surface of the case 3, and a communication hole 301 communicating the fire extinguishing container 41 and the flow pipe 42 is further provided on the top surface of the case 3. In this particular embodiment, both the flow conduit 42 and the communication hole 301 are provided inside the top wall of the tank 3, wherein the communication hole 301 opens close to the upper surface of the top wall of the tank, wherein the flow conduit 42 opens close to the lower surface of the top wall of the tank. In addition, one end of the circulation pipeline 42 inside the box 3 is provided with a plurality of spray heads 43 which are uniformly distributed, specifically, the plurality of spray heads 43 are formed on the inner side of the top surface of the box 3, and the plurality of spray heads are all communicated with the circulation pipeline. Thus, the fire extinguishing material flows from the inside of the fire extinguishing container through the communication hole 301 and the flow pipe 42 in this order, enters the spray head 43, and is sprayed from the spray head into the inside of the case 3.
A pretreatment device 5 including a vacuum pump 51 capable of unidirectionally pumping air inside the casing 3 to the outside of the sealing cover 2 is positioned on the outer peripheral side of the casing 3. The concrete setting structure is as follows: the vacuum pump 51 is fixedly arranged on the peripheral side wall of the box body 3, an air exhaust pipe 52 is fixedly arranged at the air exhaust end of the vacuum pump, and the other end of the air exhaust pipe penetrates through the box body and extends into the box body; an outlet pipe 53 is fixedly arranged at the output end of the vacuum pump 51, and the other end of the outlet pipe penetrates through the sealing cover and extends to the outer side of the sealing cover. Meanwhile, a check valve 54 is threadedly fixed to an output end of the outlet pipe 53. The pretreatment device can utilize the air suction pipe 52 to suck the air in the box body 3, and then the sucked air is discharged out of the box body 3 through the air outlet pipe 53, and meanwhile, the one-way valve 54 can avoid air backflow.
The working principle of the invention is as follows:
when the device is used, sealing oil is injected into the oil groove 11, and then the box body 3 is installed on the installation seat 12 of the sealing seat 1 to complete the installation and fixation of the box body 3; then the fire extinguishing container 41 of the fire extinguishing device 4 is arranged above the box body 3, and the installation and fixation of the fire extinguishing device 4 are completed by combining the circulating pipeline 42 and the spray head 43 arranged at the top end inside the box body 3; and finally, clamping the sealing cover 2 into the oil groove 11 of the sealing seat 1 to complete the installation and fixation of the explosion-proof electrical control box. An environment monitoring device is arranged in the box body 3, and when the environment in the box body 3 is detected to be abnormal, such as the temperature, the humidity, the gas concentration and the like are changed, workers can be warned through an alarm. The working personnel opens the pretreatment device 5, the box body 3 is vacuumized by using the exhaust pipe 52 of the vacuum pump 51, the exhausted air is exhausted by using the air outlet pipe 53, so that a vacuum environment is formed in the box body 3, the box body environment which is not easy to explode is formed, and at the moment, the sealing cover 2 is opened again to overhaul the box body 3; if a short-circuit spark or other abnormal conditions are found, the fire extinguishing device 4 can be opened, the fire extinguishing material in the fire extinguishing container 41 is sprayed out from the spray head 43 through the flow pipeline 42 and sprayed to each corner in the box body 3, the environment in the box body 3 is improved by spraying the fire extinguishing material in the fire extinguishing container 41 through the spray head 43, explosion or fire is avoided, and the overall safety of the explosion-proof box body 3 is enhanced.
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 are equivalent to or changed within the technical scope of the present invention.
Claims (10)
1. The utility model provides an explosion-proof type electrical control box, includes seal receptacle (1), sealed cowling (2) and box (3), sealed cowling sealed block sets firmly on the seal receptacle, the box block is fixed in on the seal receptacle and is located inside the sealed cowling, its characterized in that: a fire extinguishing device (4) is fixedly arranged on the top end of the box body (3), and comprises a fire extinguishing container (41) which is used for containing fire extinguishing materials and is positioned on the top surface of the box body; a circulation pipeline (42) communicated with the interior of the fire extinguishing container (41) is arranged on the top surface of the box body (3), and a plurality of uniformly distributed spray heads (43) are arranged at one end of the circulation pipeline (42) positioned in the box body (3); a pretreatment device (5) is positioned on the outer peripheral side of the box body (3), and the pretreatment device comprises a vacuum pump (51) which can unidirectionally pump air in the box body (3) to the outer side of the sealing cover (2).
2. An explosion-proof type electric control box according to claim 1, characterized in that: the vacuum pump (51) is fixedly arranged on the peripheral side wall of the box body (3), an air exhaust pipe (52) is fixedly arranged at the air exhaust end of the vacuum pump, and the other end of the air exhaust pipe penetrates through the box body and extends into the box body; and the output end of the vacuum pump (51) is fixedly provided with an air outlet pipe (53), and the other end of the air outlet pipe penetrates through the sealing cover and extends to the outer side of the sealing cover.
3. An explosion-proof type electric control box according to claim 2, characterized in that: the output end of the air outlet pipe (53) is fixedly connected with a one-way valve (54) in a threaded manner.
4. An explosion-proof type electric control box according to claim 1, characterized in that: the top surface of the box body (3) is provided with a communication hole (301) which is communicated with the fire extinguishing container (41) and the circulating pipeline (42).
5. An explosion-proof type electric control box according to claim 4, characterized in that: the spray heads (43) are formed on the inner side of the top surface of the box body (3), and the spray heads are communicated with the circulation pipeline.
6. An explosion-proof type electric control box according to claim 1, characterized in that: an oil groove (11) matched with the sealing cover is formed in the sealing seat (1), and the bottom end of the sealing cover (2) is clamped and fixed in the oil groove in a sealing mode; the sealing seat (1) is located on the inner side of the oil groove, the mounting seat (12) matched with the box body is fixedly arranged on the inner side of the oil groove, and the bottom end of the box body (3) is clamped and fixed on the mounting seat.
7. An explosion-proof type electric control box according to claim 6, characterized in that: all bond fixedly on two inside walls that oil groove (11) is relative adhesive tape (13) that are double-deck composite construction, this adhesive tape is including laminating in the sealing of oil groove inside wall lower half and laminating in the clearance portion of oil groove inside wall first, this sealing and clearance portion integrated into one piece.
8. An explosion-proof type electric control box according to claim 7, characterized in that: the top of clearance portion with the top entry of oil groove flushes, and the top of this clearance portion extends along the horizontal direction and forms the portion of covering, and this portion of covering can cover the notch that covers the oil groove.
9. An explosion-proof type electric control box according to claim 8, characterized in that: the inside of oil groove (11) is filled with sealing oil, just the bottom block of sealed cowling sets firmly between the sealing of two adhesive tapes in the oil groove.
10. An explosion-proof type electric control box according to claim 1, characterized in that: an interlayer (31) for filling sand materials is arranged in the box body (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011402723.6A CN112492809A (en) | 2020-12-04 | 2020-12-04 | Explosion-proof electrical control box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011402723.6A CN112492809A (en) | 2020-12-04 | 2020-12-04 | Explosion-proof electrical control box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112492809A true CN112492809A (en) | 2021-03-12 |
Family
ID=74939759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011402723.6A Withdrawn CN112492809A (en) | 2020-12-04 | 2020-12-04 | Explosion-proof electrical control box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112492809A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022116636A1 (en) * | 2020-12-04 | 2022-06-09 | 帕格曼科技(太仓)有限公司 | Explosion-proof electrical control box |
-
2020
- 2020-12-04 CN CN202011402723.6A patent/CN112492809A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022116636A1 (en) * | 2020-12-04 | 2022-06-09 | 帕格曼科技(太仓)有限公司 | Explosion-proof electrical control box |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210312 |
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| WW01 | Invention patent application withdrawn after publication |