CN204716488U - A kind of full-oil-free lubrication high pressure compressor - Google Patents
A kind of full-oil-free lubrication high pressure compressor Download PDFInfo
- Publication number
- CN204716488U CN204716488U CN201520427635.XU CN201520427635U CN204716488U CN 204716488 U CN204716488 U CN 204716488U CN 201520427635 U CN201520427635 U CN 201520427635U CN 204716488 U CN204716488 U CN 204716488U
- Authority
- CN
- China
- Prior art keywords
- high pressure
- crank shaft
- cylinder
- throw crank
- crankcase
- 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
Landscapes
- Compressor (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
The utility model discloses a kind of full-oil-free lubrication high pressure compressor, comprise driving mechanism, two-throw crank shaft, the crankcase of two W type structure and gas compressing apparatus; Two-throw crank shaft is arranged in the crankcase of two W type structure, two-throw crank shaft is connected with driving mechanism, driving mechanism drives has the two-throw crank shaft of fulcrum roller to rotate, the left and right bearings at both ends of the crankcase of two W type structure is connected with two-throw crank shaft, described gas compressing apparatus has six groups, often organize structure identical, include connecting rod, guide cylinder, cooling type cylinder, combined piston, high pressure stage air-valve assembly and cylinder head, driving mechanism drives gas compressing apparatus to carry out multistage compression to gas by two-throw crank shaft, thus exports high pressure stage pressurized gas.Adopt the technical solution of the utility model, complete machine structure is simple, low cost of manufacture, and volumetric efficiency is high, installs and easy to maintenance, and the life-span is long, reliable and stable.
Description
Technical field
The utility model relates to high pressure compressor, is specifically related to a kind of full-oil-free lubrication high pressure compressors that gas pressure reaches 35Mpa.
Background technique
High-pressure compressed air is of many uses, as all too busy to get away in the startup of the transmitting of guided missile, large-scale diesel engine, pipeline and the purging leak detection of container, the breathing of diver etc.; It is in addition, rare that bottle is filled in the recovery of noble gas high pressure, the pressurization accumulating of flammable explosive gas as hydrogen, rock gas etc. also all be unable to do without high pressure compressor.In the world, the high pressure compressors that can provide, as the high pressure compressor that Germany, Italy and the design such as domestic are produced, be glossy slip, disadvantage be gas after compression, be mixed into compressor oil to some extent, this will cause following defect: the first, for reaching the object obtaining clean pressurized gas, just must increase pressurized gas repurity equipment, make pressurized gas system complicated, set up compression system expense and raise; The second, because of without full-oil-free lubrication high pressure compressor, some department, as chemical reaction still, breathing need by high clean high pressure compressed gas etc., has to be forced to use the pressurized gas of oil-containing, affect reaction process and damage human body.
For above-mentioned situation, in conjunction with my company for many years in the achievement in research of no oil lubrication type reciprocating piston formula compressor field, design and manufacture the no oil lubrication type reciprocating piston formula high pressure compressor of two W type single-acting multistage compression.
Summary of the invention
The purpose of this utility model is to provide a kind of full-oil-free lubrication high pressure compressors, this compressor overcomes prior art defect, provide high-quality not containing the high pressure compress air body of the high-cleanness, high of oil molecule, achieve the full-oil-free lubrication of environmentally safe, complete machine structure is simple, low cost of manufacture, volumetric efficiency is high, install and easy to maintenance, the life-span is long, reliable and stable.
For achieving the above object, the utility model solves the technological scheme that its technical problem adopts: a kind of full-oil-free lubrication high pressure compressor, comprise driving mechanism, it is characterized in that, this full-oil-free lubrication high pressure compressor also comprises two-throw crank shaft, the crankcase of two W type structure and gas compressing apparatus; Described two-throw crank shaft is arranged in the crankcase of two W type structure;
Described two-throw crank shaft is connected with driving mechanism, is provided with the fulcrum roller of sealed type grease lubrication at two-throw crank shaft intermediate point, and driving mechanism drives has the two-throw crank shaft of fulcrum roller to rotate;
The left main bearing that passes on left of the crankcase of described pair of W type structure is connected with the left end of two-throw crank shaft, and right side is connected with the right-hand member of two-throw crank shaft with right main bearing by bearing support;
Described gas compressing apparatus has six groups, often organizes structure identical, includes connecting rod, guide cylinder, cooling type cylinder, combined piston, high pressure stage air-valve assembly and cylinder head; The lower end of described connecting rod is arranged in the crankcase of two W type structure, all be connected with two-throw crank shaft by connecting rod bottom-end bearing, the upper end of connecting rod is all stretched in guide cylinder corresponding thereto, and the rotary motion of two-throw crank shaft is become the linear reciprocating motion of small end microcephaly by driving mechanism; Described guide cylinder is arranged on the top of the crankcase of two W type structure and affixed with the crankcase of two W type structure, wrist pin, guide piston and push rod is provided with in guide cylinder, the upper end of described connecting rod is connected with wrist pin by small end bearing, described wrist pin is connected with guide piston, the upper end of guide piston is connected with the lower end of push rod, the upper end of push rod extend in the cooling type cylinder above it, by the linear reciprocating motion of connecting rod, the push rod of guide piston upper end is driven to do linear reciprocating motion in cooling type cylinder; Be provided with combined piston in described cooling type cylinder, high pressure stage air-valve assembly and cylinder head are installed on cooling type cylinder.
Between guide piston and guide cylinder and between push rod and cooling type cylinder, all guide ring is installed.
Described cooling type cylinder is Wind-cooling type or water-cooling type high pressure cylinder; Described water-cooling type high pressure stage cylinder is made into the split-type structural with water jacket at its skin.
Described combined piston adopts combined floating type installation, in cooling type cylinder, automatically look for the heart; The structure of combined piston is 3 stops composite structure, and it is complied with down and is up provided with first throttle ring, the second restrictor ring and the 3rd restrictor ring successively, describedly on combined piston, is also provided with multiple tracks piston ring, and described piston ring is helical structure.
The left and right main bearing of sealed type grease lubrication is set respectively at the fulcrum roller two ends that two-throw crank shaft intermediate point is provided with sealed type grease lubrication, relies on fulcrum roller and left and right main bearing these 3 to be connected by the crankcase of two-throw crank shaft with pair W type structure; Two-throw crank shaft is installed and is installed with two Balance Irons, so that compressor assembly is stressed reach balance.
In the lower end of the crankcase of two W type structure, lower seal plate is installed, at the axle head of two-throw crank shaft, shaft seal is installed, make the crankcase of two W type structure form airtight compression volume system, to be applicable to compress multiple special gas.
Described high pressure stage air-valve assembly adopts high pressure Reed Valve group.
In technique scheme, driving mechanism drives the two-throw crank shaft of compressor to rotate, under the effect of connecting rod, the combined piston of compressor moves reciprocatingly, after low pressure gas being sucked one-level cylinder compression, through the leading role of high pressure stage air-valve assembly, be discharged to one-level cooling during rolling formula cylinder to cool, then enter secondary cylinder again to compress, similarly due to the single effect of high pressure stage air-valve assembly, Exhaust Gas enters secondary cooling during rolling formula cylinder and cools, circulation like this, until three grades, level Four, Pyatyi or even six grades of compressions, then after the 6th grade of cooling type cylinder cooling, compressor is discharged, complete the process of compression boosting.The utility model has following Advantageous Effects:
First, the utility model is the no oil lubrication type reciprocating piston formula high pressure compressor of two W type structure, comprise the crankcase, connecting rod, single-acting cylinder, guide cylinder, guide piston, the combined piston that have the two-throw crank shaft of intermediate support, two W type structure of full-oil-free lubrication, air valve etc., by combination in any, continuous multi-stage compresses, its combined piston adopts three segments combined structures, adopt and three road restrictor rings and the coefficient unique texture of six road piston rings have been installed in the above, the gas realizing high pressure exports, and the pressure of gas can reach 35Mpa;
The second, what the utility model adopted is full-oil-free lubrication type bent axle with intermediate support.This structure first Application is on no oil lubrication type reciprocating piston formula high pressure compressor, and this bent axle adopts the method for casting or forging to form through mechanical time processing, and complete machine structure is simple, low cost of manufacture, installs and easy to maintenance, and the life-span is long, safe and reliable;
3rd, high pressure stage air-valve assembly of the present utility model have employed high pressure Reed Valve group, has that structure is simple, volumetric efficiency is high, reliable and stable.
4th, the lubrication of each kinematic pair of compressor adopts the high-performance lubricating grease closed, gas medium is in whole compression process, do not contact thin oil, thus be not polluted by the oil, to ensure in pressurized gas not oil-containing vapour molecule, provide high-quality not containing the pressurized gas of the high-cleanness, high of oil molecule, achieve the full-oil-free lubrication of environmentally safe.
5th, the crankcase of the two W type structures designed by the utility model is open wide, seal structure convenient to both, the effect of combination seal part, expands application area of the present utility model.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of full-oil-free lubrication high pressure compressor of the utility model.
Embodiment
Below in conjunction with drawings and Examples, a kind of full-oil-free lubrication high pressure compressor of the utility model is described in further detail.The accompanying drawing forming the application is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.
As seen from Figure 1, a kind of full-oil-free lubrication high pressure compressor of the present embodiment is made up of the crankcase 2 of driving mechanism, two-throw crank shaft 1, two W type structure and gas compressing apparatus.The driving mechanism of the present embodiment is made up of motor, vee belt and main wheel 27, and motor drives main wheel 27 to operate by vee belt.Two-throw crank shaft 1 is arranged in the crankcase 2 of two W type structure; Two-throw crank shaft 1 is connected with the main wheel 27 in driving mechanism, is provided with the fulcrum roller 3 of sealed type grease lubrication at two-throw crank shaft 1 intermediate point, and motor is driven by main wheel 27 has the two-throw crank shaft 1 of fulcrum roller 3 to rotate; The fulcrum roller 3 of sealed type grease lubrication is provided with at two-throw crank shaft 1 intermediate point, left main bearing 4 and the right main bearing 5 of sealed type grease lubrication are installed respectively at the two ends of fulcrum roller 3, rely on fulcrum roller 3 to be connected by the crankcase 2 of two-throw crank shaft 1 with two W type structure with left main bearing 4 and right main bearing 5 these 3; The left main bearing 4 that passes on left of the crankcase 2 of two W type structure is connected with the left end of two-throw crank shaft 1, and right side is connected with the right-hand member of two-throw crank shaft 1 with right main bearing 5 by bearing support 6.Two-throw crank shaft 1 is installed and is installed with two Balance Irons 2, so that compressor assembly is stressed reach balance.
In the present embodiment, the lower end of the crankcase 2 of two W type structure has to be opened wide and airtight two kinds, for reaching the object of compression special gas, in the lower end of the crankcase 2 of two W type structure, lower seal plate 25 is installed, at the axle head of two-throw crank shaft 1, shaft seal 26 is installed, the crankcase 2 of two W type structure is made to form airtight compression volume system, to be applicable to compress multiple special gas.The gas compressing apparatus of the present embodiment has six groups, often organize structure identical, as required, it is different that the size often organized opens shape to shape, often organizes gas compressing apparatus and include connecting rod 7, guide cylinder 8, cooling type cylinder 9, combined piston 10, high pressure stage air-valve assembly 11 and cylinder head 12, the lower end of connecting rod 7 is arranged in the crankcase 2 of two W type structure, all be connected with two-throw crank shaft 1 by connecting rod bottom-end bearing 13, the upper end of connecting rod 7 is all stretched in guide cylinder 8 corresponding thereto, and the rotary motion of two-throw crank shaft 1 is become the linear reciprocating motion of connecting rod 7 by driving mechanism, guide cylinder 8 is arranged on the top of the crankcase 2 of two W type structure and affixed with the crankcase 2 of two W type structure, wrist pin 14 is provided with in guide cylinder 8, guide piston 15 and push rod 16, the upper end of connecting rod 7 is connected with wrist pin 14 by small end bearing 17, wrist pin 14 is connected with guide piston 15, the upper end of guide piston 15 is connected with the lower end of push rod 16, the upper end of push rod 16 extend in the cooling type cylinder 9 above it, by the linear reciprocating motion of connecting rod 7, the push rod 16 of guide piston 15 upper end is driven to do linear reciprocating motion in cooling type cylinder 9, for preventing guide piston 15 and grazing between push rod 16 and cylinder, between guide piston 15 and guide cylinder 8 and between push rod 16 and cooling type cylinder 9, guide ring 18 is all installed, combined piston 10 is provided with in cooling type cylinder 9, high pressure stage air-valve assembly 11 and cylinder head 12 are installed on cooling type cylinder 9, in the present embodiment, high pressure stage air-valve assembly 11 adopts high pressure Reed Valve group.The cooling type cylinder 9 of this compressor has water-cooled and air-cooled two kinds of types of cooling, in the present embodiment, adopts water-cooled cooling, cylinder skin is made into the split-type structural with water jacket 19.In the present embodiment, combined piston 10 adopts combined floating type installation, automatically the heart is looked in cooling type cylinder 9, the structure of combined piston 10 is 3 stops composite structure, it is complied with down and is up provided with first throttle ring 20, second restrictor ring 21 and the 3rd restrictor ring 22 successively, combined piston 10 is also provided with multiple tracks piston ring 23, in the present embodiment, piston ring 23 is six roads, in actual applications, piston ring 23 can be 7 roads, also can 8 roads, 9 roads or 10 roads, and six road piston rings 23 are helical structure.Two-throw crank shaft 1 is provided with two Balance Irons 24, so that compressor assembly is stressed reach balance.
In the present embodiment, the fulcrum roller 3 that each kinematic pair of this compressor is used, left main bearing 4, right main bearing 5, connecting rod bottom-end bearing 13, small end bearing 17 are sealed type purport lubricating bearings.This compressors shaft seal 26 adopts unlubricated (machinery or magnetic force) sealing means, simple and reliable.
Guide ring 18 in this compression, piston ring 23, first throttle ring 20, second restrictor ring 21 and the 3rd restrictor ring 22 all adopt the macromolecular material of selflubricating to make, and wear resistance is good, long service life.
In the present embodiment, motor is driven by main wheel 27 has the two-throw crank shaft 1 of fulcrum roller 3 to rotate, the connecting rod 7 that rotarily drives of two-throw crank shaft 1 does reciprocating linear motion, under the effect of connecting rod 7, the push rod 16 of guide piston 15 upper end is driven to do linear reciprocating motion in cooling type cylinder 9, the combined piston 10 of compressor is driven to move reciprocatingly, after low pressure gas being sucked one-level cylinder compression, through the leading role of high pressure stage air-valve assembly 11, be discharged to one-level cooling during rolling formula cylinder to cool, then enter secondary cylinder again to compress, similarly due to the single effect of high pressure stage air-valve assembly, Exhaust Gas enters secondary cooling during rolling formula cylinder and cools, circulation like this, until three grades, level Four, Pyatyi or even six grades of compressions, then after the 6th grade of cooling type cylinder cooling, compressor is discharged, complete the process of compression boosting.
The present embodiment can be used for the multiple gases such as pressurized air, helium, can provide pure air or the special gas of high pressure.
The above; only embodiment of the present utility model; not the utility model is imposed any restrictions; every above embodiment is done according to the utility model technical spirit any simple modification, change and equivalent method change, all still belong in the protection domain of technical solutions of the utility model.
Claims (7)
1. a full-oil-free lubrication high pressure compressor, comprises driving mechanism, it is characterized in that, this full-oil-free lubrication high pressure compressor also comprises two-throw crank shaft (1), the crankcase (2) of two W type structure and gas compressing apparatus; Described two-throw crank shaft (1) is arranged in the crankcase (2) of two W type structure;
Described two-throw crank shaft (1) is connected with driving mechanism, is provided with the fulcrum roller (3) of sealed type grease lubrication at two-throw crank shaft (1) intermediate point, and driving mechanism drives has the two-throw crank shaft of fulcrum roller (3) (1) to rotate;
The left main bearing (4) that passes on left of the crankcase (2) of described pair of W type structure is connected with the left end of two-throw crank shaft (1), and right side is connected with the right-hand member of right main bearing (5) with two-throw crank shaft (1) by bearing support (6);
Described gas compressing apparatus has six groups, often organizes structure all identical, includes connecting rod (7), guide cylinder (8), cooling type cylinder (9), combined piston (10), high pressure stage air-valve assembly (11) and cylinder head (12), the lower end of described connecting rod (7) is arranged in the crankcase (2) of two W type structure, all be connected with two-throw crank shaft (1) by connecting rod bottom-end bearing (13), the upper end of connecting rod (7) is all stretched in guide cylinder (8) corresponding thereto, and the rotary motion of two-throw crank shaft (1) is become the linear reciprocating motion of connecting rod (7) upper end microcephaly by driving mechanism, described guide cylinder (8) is arranged on the top of the crankcase (2) of two W type structure and affixed with the crankcase (2) of two W type structure, wrist pin (14) is provided with in guide cylinder (8), guide piston (15) and push rod (16), the upper end of described connecting rod (7) is connected with wrist pin (14) by small end bearing (17), described wrist pin (14) is connected with guide piston (15), the upper end of guide piston (15) is connected with the lower end of push rod (16), the upper end of push rod (16) extend in the cooling type cylinder (9) above it, by the linear reciprocating motion of connecting rod (7), the push rod (16) of guide piston (15) upper end is driven to do linear reciprocating motion in cooling type cylinder (9), be provided with combined piston (10) in described cooling type cylinder (9), high pressure stage air-valve assembly (11) and cylinder head (12) are installed on cooling type cylinder (9).
2. a kind of full-oil-free lubrication high pressure compressor according to claim 1, is characterized in that, between guide piston (15) and guide cylinder (8) and between push rod (16) and cooling type cylinder (9), be all provided with guide ring (18).
3. a kind of full-oil-free lubrication high pressure compressor according to claim 1, is characterized in that, described cooling type cylinder (9) is Wind-cooling type or water-cooling type high pressure cylinder; Described water-cooling type high pressure cylinder is made into the split-type structural with water jacket (19) at its skin.
4. a kind of full-oil-free lubrication high pressure compressor according to claim 1, is characterized in that, described combined piston (10) adopts combined floating type installation, in cooling type cylinder (9), automatically look for the heart; The structure of described combined piston (10) is 3 stops composite structure, it is complied with down and is up provided with first throttle ring (20), the second restrictor ring (21) and the 3rd restrictor ring (22) successively, described combined piston (10) is also provided with multiple tracks piston ring (23), and described piston ring (23) is helical structure.
5. a kind of full-oil-free lubrication high pressure compressor according to claim 1, it is characterized in that, the left and right main bearing (4,5) of sealed type grease lubrication is set respectively at fulcrum roller (3) two ends that two-throw crank shaft (1) intermediate point is provided with sealed type grease lubrication, relies on fulcrum roller (3) and left and right main bearing (4,5) these 3 to be connected by the crankcase (2) of two-throw crank shaft (1) with pair W type structure; Two Balance Irons (24) are installed with, so that compressor assembly is stressed reach balance in the upper installation of two-throw crank shaft (1).
6. a kind of full-oil-free lubrication high pressure compressor according to claim 1, it is characterized in that, in the lower end of the crankcase (2) of two W type structure, lower seal plate (25) is installed, at the axle head of two-throw crank shaft (1), shaft seal (26) is installed, the crankcase (2) of two W type structure is made to form airtight compression volume system, to be applicable to compress multiple special gas.
7. a kind of full-oil-free lubrication high pressure compressor according to claim 1, is characterized in that, described high pressure stage air-valve assembly (11) adopts high pressure Reed Valve group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520427635.XU CN204716488U (en) | 2015-06-19 | 2015-06-19 | A kind of full-oil-free lubrication high pressure compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520427635.XU CN204716488U (en) | 2015-06-19 | 2015-06-19 | A kind of full-oil-free lubrication high pressure compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204716488U true CN204716488U (en) | 2015-10-21 |
Family
ID=54315490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520427635.XU Active CN204716488U (en) | 2015-06-19 | 2015-06-19 | A kind of full-oil-free lubrication high pressure compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204716488U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104895757A (en) * | 2015-06-19 | 2015-09-09 | 安庆市佰联无油压缩机有限公司 | Full-oil-free lubrication high-pressure compressor |
| CN106438269A (en) * | 2016-09-30 | 2017-02-22 | 瑞立集团瑞安汽车零部件有限公司 | Oilless air compressor transmission mechanism |
| RU210210U1 (en) * | 2021-05-19 | 2022-03-31 | Российская Федерация, от имени которой выступает Министерство промышленности и торговли Российской Федерации (Минпромторг России) | Multistage reciprocating compressor with linear drive with increased stroke relative to the stroke of the piston |
-
2015
- 2015-06-19 CN CN201520427635.XU patent/CN204716488U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104895757A (en) * | 2015-06-19 | 2015-09-09 | 安庆市佰联无油压缩机有限公司 | Full-oil-free lubrication high-pressure compressor |
| CN104895757B (en) * | 2015-06-19 | 2017-03-08 | 安庆市佰联无油压缩机有限公司 | A kind of full-oil-free lubrication high pressure compressor |
| CN106438269A (en) * | 2016-09-30 | 2017-02-22 | 瑞立集团瑞安汽车零部件有限公司 | Oilless air compressor transmission mechanism |
| RU210210U1 (en) * | 2021-05-19 | 2022-03-31 | Российская Федерация, от имени которой выступает Министерство промышленности и торговли Российской Федерации (Минпромторг России) | Multistage reciprocating compressor with linear drive with increased stroke relative to the stroke of the piston |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104895757A (en) | Full-oil-free lubrication high-pressure compressor | |
| CN204716488U (en) | A kind of full-oil-free lubrication high pressure compressor | |
| CN104019019B (en) | Energy storage type linear electric motors capsule pump | |
| CN200999710Y (en) | Non oil piston compressor for reclaiming fluoride-bearing gas working substance | |
| CN201334997Y (en) | Piston type chlorine gas compressor | |
| CN115750297A (en) | Multistage gas compressor that star type was arranged | |
| CN201650663U (en) | Efficient oil-free piston compression device | |
| CN102108957A (en) | Skid-mounted compressed natural gas (CNG) compressor set | |
| CN203098200U (en) | Mini-type full oil-free lubrication high pressure oxygen compressor | |
| CN202971083U (en) | Diaphragm type compressor | |
| CN111749868A (en) | Compression device suitable for high inlet pressure | |
| CN201650658U (en) | Vacuum pump | |
| CN201277161Y (en) | Multi-cylinder oil-free compressor of refrigerant reclaiming machine | |
| CN212656946U (en) | Oil-free high-pressure oxygen compressor and device | |
| RU127411U1 (en) | PISTON ANGULAR COMPRESSOR THREE-STAGE | |
| CN107024326A (en) | The large-scale vertical on-line Full sealing detection equipment of six cylinders diesel engine cylinder cover | |
| CN202370786U (en) | Totally oil-free lubrication high pressure air compressor | |
| CN209892396U (en) | Oil-free piston type two-stage air compressor for vehicle | |
| CN201437759U (en) | Oil-free compressor used for locomotives | |
| CN111706502A (en) | Sealing device for high-pressure plunger water injection pump packing of offshore oil platform | |
| EA202090942A1 (en) | PISTON COMPRESSOR | |
| CN203925931U (en) | A kind of compact compressor | |
| CN204476691U (en) | A kind of new type of compression crankshaft structure | |
| CN203892170U (en) | Energy-storage type linear motor capsule pump | |
| CN204113568U (en) | Without oily piston two-stage compression device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |