CN215232686U - Purification device for improving quality of make-up water of steelmaking softening station - Google Patents
Purification device for improving quality of make-up water of steelmaking softening station Download PDFInfo
- Publication number
- CN215232686U CN215232686U CN202121124940.3U CN202121124940U CN215232686U CN 215232686 U CN215232686 U CN 215232686U CN 202121124940 U CN202121124940 U CN 202121124940U CN 215232686 U CN215232686 U CN 215232686U
- Authority
- CN
- China
- Prior art keywords
- water
- steelmaking
- pipe
- station
- water inlet
- 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.)
- Active
Links
Images
Landscapes
- Water Treatment By Sorption (AREA)
Abstract
The utility model relates to an improve purifier of steelmaking soft water station makeup water quality of water belongs to metallurgical industry steelmaking operation equipment technical field. The technical scheme is as follows: the water pump (2) is connected with the water inlet of the water purifying box shell (5) through the water inlet pipe (4), the water outlet of the water purifying box shell (5) is connected with the water storage tank (9) through the water outlet pipe (8), and the water storage tank (9) is connected with the soft water station (11) through the soft water station water inlet pipe (10); inside polylith baffle that sets up of purifier housing (5), polylith baffle separates into a plurality of boxes with the purifier housing, and every bottom half is equipped with trapezoidal barrel (12), and a plurality of trapezoidal barrel (12) bottom is connected with blow off pipe (18) through the blowoff valve respectively, and blow off pipe (18) are connected with effluent water sump (19). The utility model discloses reduce and supply aquatic silt, floater content, improved steelmaking soft water station and supplied water quality, be favorable to the high-efficient steady operation of steelmaking soft water equipment, reduced staff intensity of labour.
Description
Technical Field
The utility model relates to an improve purifier of steelmaking soft water station makeup water quality of water belongs to metallurgical industry steelmaking operation equipment technical field.
Background
The soft water station of steel mill directly regards groundwater, normal water as the make-up water in the past, does not have filter equipment, and make-up water quality of water is poor, contains silt, floater more, increases the soft water equipment load, is unfavorable for the operation of soft water equipment, reduces soft water equipment efficiency, has increased the soft water equipment loss, has reduced production efficiency, reduces soft water output rate, has increased staff intensity of labour, has improved manufacturing cost.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an improve purifier of soft water station make-up water quality of water of steelmaking can reduce and supply aquatic silt, floater content, improves soft water station make-up water quality of steelmaking and steel mill's soft water equipment operation rate, guarantees the high-efficient operation of soft water equipment, improves soft water equipment production efficiency and soft water output rate, reduces staff intensity of labour and manufacturing cost, has solved the problem that exists in the background art.
The technical scheme of the utility model is that:
a purification device for improving the quality of make-up water of a steelmaking soft water station comprises a water pump, a water inlet pipe, a water purification box shell, a water outlet pipe, a water storage tank, a trapezoidal cylinder, a blow-off pipe and a sewage tank, wherein the water purification box shell is a rectangular box with an opening at the lower part, a water inlet and a water outlet are respectively arranged at two sides of the water purification box shell, the water pump is connected with the water inlet of the water purification box shell through the water inlet pipe, the water outlet of the water purification box shell is connected with the water storage tank through the water outlet pipe, and the water storage tank is connected with the soft water station through the water inlet pipe of the soft water station; the water purifying box is characterized in that a plurality of partition plates are arranged in the water purifying box shell, the partition plates are parallel to the two sides of the water purifying box shell, the water purifying box shell is divided into a plurality of box bodies, gaps are formed between the top ends of the partition plates and the top of the water purifying box shell, the heights of the partition plates are sequentially reduced, the partition plate close to the water inlet pipe is the highest, and the partition plate close to the water outlet pipe is the lowest; and a trapezoidal barrel is arranged at the bottom of each box body, the bottoms of the trapezoidal barrels are respectively connected with a blow-off pipe through a blow-off valve, and the blow-off pipe is connected with a sewage pool.
The inner wall of the water outlet of the water purifying tank shell is provided with a wire mesh, the wire mesh is arranged in front of the water outlet pipe and is close to the water outlet pipe, and the wire mesh can intercept the floating objects in the water purifying tank shell to eliminate the floating objects in the water.
The water purifying tank shell is arranged on the water purifying tank support.
The water purification device is characterized in that a first water inlet valve and a second water inlet valve are respectively arranged on the water inlet pipes on two sides of the water pump, the second water inlet valve is close to the shell of the water purification box, the first water inlet valve, the water pump, the second water inlet valve and the water inlet pipe form a water inlet system of the water purification box, and the first water inlet valve and the second water inlet valve respectively control whether water enters or not and the water inflow.
And a water outlet valve is arranged on the water outlet pipe and controls the water outlet of the water purifying tank.
The height of the partition board close to the water inlet pipe is larger than that of the water inlet pipe, and the height of the partition board close to the water outlet pipe is larger than that of the water outlet pipe.
The trapezoidal cylinder is formed by welding four trapezoidal iron plates, is wide at the top and narrow at the bottom and is welded at the bottom of each box body.
The number of the partition plates is four, the partition plates are a first partition plate, a second partition plate, a third partition plate and a fourth partition plate, the height of the first partition plate is the highest, the height of the fourth partition plate is the lowest, the height of the first partition plate is larger than that of the water inlet pipe, and the height of the fourth partition plate is larger than that of the water outlet pipe; the water purifying box is characterized in that a shell of the water purifying box is divided into five boxes by a first partition plate, a second partition plate, a third partition plate and a fourth partition plate, the five boxes are a first box, a second box, a third box, a fourth box and a fifth box in sequence, the first box, the second box, the third box, the fourth box and the fifth box are respectively connected with a first blow-off valve, a second blow-off valve, a third blow-off valve, a fourth blow-off valve and a fifth blow-off valve through respective trapezoidal cylinders, and the first blow-off valve, the second blow-off valve, the third blow-off valve, the fourth blow-off valve and the fifth blow-off valve are all connected with blow-off pipes. The blow off pipe plays the effect of discharging sewage, silt in the water purification case into the effluent water sump.
The utility model discloses installed before steel mill soft water station soft water preparation equipment, add the water purification case that the theory of operation is the overflow sediment in the makeup water link, the makeup water passes through in the inlet tube gets into the water purification case casing, through the continuous sediment purification of 4 layers of baffle, make silt obtain fully precipitating, the aquatic floater is behind the wire netting interception in the water purification case casing in outlet pipe the place ahead, the makeup water after purifying gets into the cistern by the outlet pipe, treat in the water purification case casing that silt content is more, open the blowoff valve, arrange sewage and silt into the effluent water sump.
The utility model has the advantages that: the system has the advantages that the system is additionally provided with a water supplementing filtering and purifying link, the content of silt and floating matters in supplementing water is reduced, the water supplementing quality of the steelmaking soft water station is improved, the requirement of the steelmaking soft water station on water quality is guaranteed, the high-efficiency stable operation of steelmaking soft water equipment is facilitated, the production efficiency of the steelmaking soft water equipment is improved, the steelmaking soft water output rate is improved, the labor intensity of workers is reduced, and the production benefit is increased.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a sectional view of the water purifying tank of the present invention;
FIG. 3 is a top view of the water purifying tank of the present invention;
in the figure: 1. the water purifier comprises a water inlet valve I, a water pump I, a water inlet valve II, a water inlet pipe 4, a water purifying tank shell 5, a wire mesh 6, a water outlet valve 7, a water outlet pipe 8, a water storage tank 9, a water softening station water inlet pipe 10, a water softening station 11, a trapezoidal cylinder 12, a sewage discharge valve I, a sewage discharge valve II, a sewage discharge valve III, a sewage discharge valve IV, a sewage discharge valve V, a sewage discharge pipe 18, a sewage tank 19, a partition plate I, a partition plate II, a partition plate 22, a partition plate III, a partition plate 23, a partition plate IV, a partition plate 24, a tank I, a tank II, a tank 26, a tank III, a tank IV, a tank 28, a tank V, a water purifying tank support 30.
Detailed Description
The present invention will be further explained by way of examples with reference to the accompanying drawings.
A purification device for improving the quality of make-up water of a steelmaking softening station comprises a water pump 2, a water inlet pipe 4, a water purification tank shell 5, a water outlet pipe 8, a reservoir 9, a trapezoidal cylinder 12, a blow-off pipe 18 and a sewage pool 19, wherein the water purification tank shell 5 is a rectangular tank body with an opening at the lower part, a water inlet and a water outlet are respectively arranged at two sides, the water pump 2 is connected with the water inlet of the water purification tank shell 5 through the water inlet pipe 4, the water outlet of the water purification tank shell 5 is connected with the reservoir 9 through the water outlet pipe 8, and the reservoir 9 is connected with a softening station 11 through a softening station water inlet pipe 10; a plurality of partition plates are arranged in the water purifying tank shell 5 and are parallel to two sides of the water purifying tank shell 5, the water purifying tank shell 5 is divided into a plurality of tank bodies, gaps are formed between the top ends of the partition plates and the top of the water purifying tank shell 5, the heights of the partition plates are sequentially reduced, the partition plate close to the water inlet pipe is the highest, and the partition plate close to the water outlet pipe is the lowest; the bottom of each box body is provided with a trapezoidal cylinder body 12, the bottoms of the trapezoidal cylinder bodies 12 are respectively connected with a sewage discharge pipe 18 through a sewage discharge valve, and the sewage discharge pipe 18 is connected with a sewage pool 19.
Be equipped with wire netting 6 on the inner wall of 5 delivery ports departments of water purification box casing, wire netting 6 sets up in 8 the place ahead of outlet pipe to adjacent outlet pipe 8, the wire netting can be with aquatic floater interception in water purification box casing, eliminates aquatic floater.
The clean water tank case 5 is provided on the clean water tank bracket 30.
The water purification device is characterized in that a first water inlet valve 1 and a second water inlet valve 3 are arranged on the water inlet pipe 4 on two sides of the water pump 2 respectively, the second water inlet valve 3 is close to the water purification box shell 5, the first water inlet valve 1, the water pump 2, the second water inlet valve 3 and the water inlet pipe 4 form a water inlet system of the water purification box, and the first water inlet valve 1 and the second water inlet valve 3 control whether water enters or not and control the water inflow respectively.
And a water outlet valve 7 is arranged on the water outlet pipe 8, and the water outlet valve 7 controls the water outlet of the water purifying tank.
The height of the partition board close to the water inlet pipe is larger than that of the water inlet pipe, and the height of the partition board close to the water outlet pipe is larger than that of the water outlet pipe.
The trapezoidal cylinder 12 is formed by welding four trapezoidal iron plates, is wide at the top and narrow at the bottom and is welded at the bottom of each box body.
The number of the partition plates is four, the partition plates are a first partition plate 20, a second partition plate 21, a third partition plate 22 and a fourth partition plate 23 respectively, the height of the first partition plate is the highest, the height of the fourth partition plate is the lowest, the height of the first partition plate is larger than that of the water inlet pipe, and the height of the fourth partition plate is larger than that of the water outlet pipe; the water purifying box shell 5 is divided into five boxes through a first partition plate 20, a second partition plate 21, a third partition plate 22 and a fourth partition plate 23, the five boxes are sequentially a first box 24, a second box 25, a third box 26, a fourth box 27 and a fifth box 28, the first box 24, the second box 25, the third box 26, the fourth box 27 and the fifth box 28 are respectively connected with a first blow-off valve 13, a second blow-off valve 14, a third blow-off valve 15, a fourth blow-off valve 16 and a fifth blow-off valve 17 through respective trapezoid cylinders, and the first blow-off valve 13, the second blow-off valve 14, the third blow-off valve 15, the fourth blow-off valve 16 and the fifth blow-off valve 17 are all connected with a blow-off pipe 18. The blow off pipe plays the effect of discharging sewage, silt in the water purification case into the effluent water sump.
In the embodiment, referring to fig. 1, 2 and 3, the water inlet pipe 4 is positioned on the water purifying tank shell at the left side of the water purifying tank, and is 350mm away from the upper boundary of the water purifying tank shell 5 and is 1000mm away from the front and back boundaries of the water purifying tank shell 5 respectively; intake valve 1, water pump 2, intake valve two 3 are all settled on inlet tube 4, and intake valve 1 is farthest away from water purification case, and intake valve two 3 is nearest apart from water purification case, and water pump 2 is located between intake valve 1 and the intake valve two 3, and intake valve one, water pump, intake valve two and inlet tube constitute water purification case's water inlet system, and intake valve 1 and the water supply of intake valve two 3 control make-up water, and water pump 2 plays the effect that the flow was guaranteed in the pressure boost. The water purifying tank shell 5 is a rectangular structure which is composed of two 2000mm multiplied by 2000mm steel plates and three 4000mm multiplied by 2000mm steel plates, the length, width and height of the rectangular structure are 4000mm, 2000mm and 2000mm respectively, and the rectangular structure is not provided with a lower surface, and the water purifying tank shell 5 plays a role in supporting the internal structure of the water purifying tank; the water purifying tank shell 5 is welded on the water purifying tank bracket 30, and the water purifying tank bracket 30 is formed by welding channel steel and plays a role in supporting the water purifying tank. The water outlet pipe 8 is positioned on the water purifying tank shell on the right side of the water purifying tank, is 950mm away from the upper boundary of the water purifying tank shell 5 and is 1000mm away from the front boundary and the rear boundary of the water purifying tank shell respectively, and the purified water is transported to the reservoir 9 by the water outlet pipe 8; the wire netting 6 is welded on the inner side of the water purifying tank shell 5, the front part of the water outlet pipe 8 is close to the water outlet pipe 8, and the wire netting 6 can intercept floating objects in water in the water purifying tank, eliminate the floating objects in the water and purify the water quality; the reservoir 9 is positioned on the right side of the water purification tank and on the air ground on the left side of the soft water station 11 of the steel plant; the water outlet valve 7 is positioned on a water outlet pipe 8 between the wire netting 6 and the reservoir 9, and outputs purified water into the reservoir 9; a soft water station water inlet pipe 10 is connected with the water storage tank 9 and the soft water station 10 and is used for transporting water in the water storage tank 9 to a soft water station 11; the first partition plate 20 is positioned inside the purified water tank shell 5, the lower end of the first partition plate is flush with the lower end of the purified water tank shell, is parallel to the left side surface of the purified water tank shell 5, is 800mm away from the left side surface of the purified water tank shell, is an iron plate with the length of 2000mm and the width of 1700mm, and the first partition plate 20 and the front side, the rear side and the left side inner surface of the purified water tank shell form a first tank body 24; the second partition plate 21 is positioned in the purified water tank shell 5, the lower end of the second partition plate is flush with the lower end of the purified water tank shell 5, the second partition plate is parallel to the first partition plate 20, is 800mm away from the first partition plate, and is an iron plate with the length of 2000mm and the width of 1500mm, and the first partition plate 20, the second partition plate 21 and the inner surfaces of the front side and the rear side of the purified water tank shell form a second tank body 25; the third partition plate 22 is positioned in the purified water tank shell 5, the lower end of the third partition plate is flush with the lower end of the purified water tank shell, is parallel to the second partition plate 21, is 800mm away from the second partition plate, is an iron plate with the length of 2000mm and the width of 1300mm, and forms a third tank body 26 by the second partition plate 21, the third partition plate 22 and the inner surfaces of the front side and the rear side of the purified water tank shell; the fourth partition plate 23 is positioned in the purified water tank shell 5, the lower end of the fourth partition plate is flush with the lower end of the purified water tank shell and is parallel to the third partition plate 22, the fourth partition plate 22 is 800mm away from the third partition plate 22 and the inner surface of the right side of the purified water tank shell respectively, the fourth partition plate 22 and the fourth partition plate 23 are iron plates with the length of 2000mm and the width of 1100mm, the fourth partition plate 22 and the fourth partition plate 23 form a fourth tank body 27 together with the inner surfaces of the front side and the rear side of the purified water tank shell 5, and the fourth partition plate 23 and the inner surfaces of the front side, the rear side and the right side of the purified water tank shell 5 form a fifth tank body 28; make-up water firstly enters the first box body 25, the water level gradually rises, silt slowly sinks, after the water level exceeds the first partition plate 20, water in the first box body 24 overflows into the second box body 25, then the process in the first box body 24 is repeated until the make-up water reaches the fifth box body 28, and the make-up water overflowing from the fifth box body 28 is filtered by the floating objects in the water through the wire netting 6, so that the whole filtering link is completed. The trapezoidal cylinder 12 is formed by welding four trapezoidal iron plates and then welded at the lower end of each box body, and is similar to a funnel; the blowoff valve is connected with the trapezoidal cylinder 12 and is positioned below the trapezoidal cylinder 12, and the utility model can respectively control five box bodies to blow off; the sewage tank 19 is positioned on the left air ground of the water purification tank, the five sewage valves are all connected to the sewage discharge pipe 18, and the sewage discharge pipe 18 plays a role in conveying sewage and silt in the water purification tank to the sewage tank.
In the use, open inlet valve one 1, water pump 2 and inlet valve two 3, the make-up water flows into in box 24 by inlet tube 4, along with the make-up water constantly flows in, the water level constantly rises in box 24, simultaneously because the action of gravity, the silt constantly sinks in the make-up water, get into trapezoidal barrel, along with the water level constantly rises in box 24, after the water level surpassed baffle one 20, the water in box 24 spills over and flows into in box two 25, and then the process in box one 24 is repeated once more, until the make-up water reaches box five 28, the make-up water that spills over in box five 28 passes through the floater in the filtering water of wire netting 6 and accomplishes whole filtration link promptly. After the water outlet valve 7 is opened, the filtered supplementing water flows into the reservoir through the water outlet pipe 8 to be stored for the soft water station for steelmaking. When the silt content in the box body is higher, the corresponding blow-down valves are respectively opened, and the sewage and the silt in the water purifying box can flow into the sewage pool through the blow-down pipes. The whole process completes the filtration and purification of the make-up water of the steelmaking soft water station.
The utility model discloses reduced and supply aquatic silt, floater content, improved steelmaking soft water station and supplied water quality, guaranteed the requirement of steelmaking soft water station to quality of water, be favorable to the high-efficient steady operation of steelmaking soft water equipment, improved the production efficiency of steelmaking soft water equipment, improved steelmaking soft water output rate, reduced staff intensity of labour, increased the productivity effect. The device has the characteristics of low design cost, convenient construction, simple operation, good application effect and the like.
Claims (7)
1. The utility model provides an improve purifier of steelmaking soft water station make-up water quality of water which characterized in that: the water treatment device comprises a water pump (2), a water inlet pipe (4), a water purification tank shell (5), a water outlet pipe (8), a reservoir (9), a trapezoidal cylinder (12), a blow-off pipe (18) and a sewage pool (19), wherein the water purification tank shell (5) is a rectangular box body with an opening at the lower part, a water inlet and a water outlet are respectively arranged at two sides of the water purification tank shell, the water pump (2) is connected with the water inlet of the water purification tank shell (5) through the water inlet pipe (4), the water outlet of the water purification tank shell (5) is connected with the reservoir (9) through the water outlet pipe (8), and the reservoir (9) is connected with a soft water station (11) through a soft water station water inlet pipe (10); a plurality of partition plates are arranged in the water purifying box shell (5), the partition plates are parallel to the two sides of the water purifying box shell (5) to divide the water purifying box shell (5) into a plurality of box bodies, gaps are formed between the top ends of the partition plates and the top of the water purifying box shell (5), the heights of the partition plates are sequentially reduced, the partition plate close to the water inlet pipe is the highest, and the partition plate close to the water outlet pipe is the lowest; a trapezoidal cylinder (12) is arranged at the bottom of each box body, the bottoms of the trapezoidal cylinders (12) are respectively connected with a sewage discharge pipe (18) through a sewage discharge valve, and the sewage discharge pipe (18) is connected with a sewage pool (19).
2. The purification device for improving the quality of make-up water of the steelmaking water softening station as claimed in claim 1, wherein: and an iron wire net (6) is arranged on the inner wall of the water outlet of the water purifying box shell (5).
3. The purification device for improving the quality of make-up water of the steelmaking water softening station as claimed in claim 1 or 2, wherein: the water purifying tank shell (5) is arranged on the water purifying tank bracket (30).
4. The purification device for improving the quality of make-up water of the steelmaking water softening station as claimed in claim 1 or 2, wherein: and a water inlet valve I (1) and a water inlet valve II (3) are respectively arranged on the water inlet pipes (4) at the two sides of the water pump (2), and the water inlet valve II (3) is close to the water purifying box shell (5).
5. The purification device for improving the quality of make-up water of the steelmaking water softening station as claimed in claim 3, wherein: and a water outlet valve (7) is arranged on the water outlet pipe (8).
6. The purification device for improving the quality of make-up water of the steelmaking water softening station as claimed in claim 1 or 2, wherein: the height of the partition board close to the water inlet pipe is larger than that of the water inlet pipe, and the height of the partition board close to the water outlet pipe is larger than that of the water outlet pipe.
7. The purification device for improving the quality of make-up water of the steelmaking water softening station as claimed in claim 6, wherein: the trapezoidal cylinder (12) is formed by welding four trapezoidal iron plates, is wide at the top and narrow at the bottom and is welded at the bottom of each box body.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202121124940.3U CN215232686U (en) | 2021-05-25 | 2021-05-25 | Purification device for improving quality of make-up water of steelmaking softening station |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202121124940.3U CN215232686U (en) | 2021-05-25 | 2021-05-25 | Purification device for improving quality of make-up water of steelmaking softening station |
Publications (1)
Publication Number | Publication Date |
---|---|
CN215232686U true CN215232686U (en) | 2021-12-21 |
Family
ID=79457956
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202121124940.3U Active CN215232686U (en) | 2021-05-25 | 2021-05-25 | Purification device for improving quality of make-up water of steelmaking softening station |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN215232686U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116059737A (en) * | 2023-03-14 | 2023-05-05 | 高唐县环境监控中心 | Sewage treatment ware that sewage treatment used |
-
2021
- 2021-05-25 CN CN202121124940.3U patent/CN215232686U/en active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116059737A (en) * | 2023-03-14 | 2023-05-05 | 高唐县环境监控中心 | Sewage treatment ware that sewage treatment used |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN215232686U (en) | Purification device for improving quality of make-up water of steelmaking softening station | |
CN202179886U (en) | Wastewater filter | |
CN112657241B (en) | Upward flow filter pool with heterogeneous filter material | |
CN207361975U (en) | A kind of sanitary sewage multi-stage treatment units | |
CN109663409A (en) | Roll oil filtration system | |
CN203154885U (en) | V-shaped sedimentation tank | |
CN201186173Y (en) | Sand and water separator | |
CN207347267U (en) | A kind of water treatment system of multi-composite type | |
CN215249732U (en) | Printing and dyeing wastewater recycling equipment | |
CN212450699U (en) | Unpowered purifier of circulating water | |
CN209974461U (en) | Integrated stacked water purifier | |
CN212236121U (en) | Shallow sand filter | |
KR20030058803A (en) | Simple waterworks filtration device | |
CN209392883U (en) | Roll oil filtration system | |
CN209778477U (en) | Novel small-size regulation clarification plant | |
CN207294371U (en) | A kind of aeration refined filtration all-in-one machine with siphon destroying device | |
CN202146674U (en) | Cheek type filter | |
CN219502048U (en) | Filter of sewage treatment equipment | |
CN210814268U (en) | Slag flushing tank filtering and back-blowing device | |
CN210085031U (en) | Continuous casting type turbid circulating water purification equipment | |
CN111632430B (en) | Modular inclined plate type efficient sewage precipitation process based on different media | |
CN218046644U (en) | Shallow sand bypass filter | |
CN211078711U (en) | Integrated water purifier | |
CN219194754U (en) | High ammonia nitrogen cultivation waste water quality purification device | |
CN216934818U (en) | Automatic sedimentation tank |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
GR01 | Patent grant | ||
GR01 | Patent grant |