CN111943145A - Working method of vacuum pressure swing adsorption oxygen equipment - Google Patents
Working method of vacuum pressure swing adsorption oxygen equipment Download PDFInfo
- Publication number
- CN111943145A CN111943145A CN202010882251.2A CN202010882251A CN111943145A CN 111943145 A CN111943145 A CN 111943145A CN 202010882251 A CN202010882251 A CN 202010882251A CN 111943145 A CN111943145 A CN 111943145A
- Authority
- CN
- China
- Prior art keywords
- adsorption system
- oxygen
- tank
- pipeline
- circulation control
- 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.)
- Granted
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
- C01B13/02—Preparation of oxygen
- C01B13/0229—Purification or separation processes
- C01B13/0248—Physical processing only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/047—Pressure swing adsorption
- B01D53/0476—Vacuum pressure swing adsorption
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2210/00—Purification or separation of specific gases
- C01B2210/0001—Separation or purification processing
- C01B2210/0009—Physical processing
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oxygen, Ozone, And Oxides In General (AREA)
- Separation Of Gases By Adsorption (AREA)
Abstract
The invention discloses a working method of vacuum pressure swing adsorption oxygen equipment, which is provided with a Roots blower set and a Roots blower driving device, wherein two blowers are driven by the same motor, so that the energy consumption is reduced, the energy utilization rate is improved, the cost is reduced, and the volume of the equipment is reduced, an air inlet and exhaust circulation control device and an adsorption system output adjusting device, a connecting pipeline and a control valve on the equipment are used for further reducing the volume of a product, and the invention is provided with a stepping motor, an adsorption system output adjusting device, an adsorption system pressure equalizing adjusting device and an air inlet and exhaust circulation control device, so that the invention realizes the control of air inlet and exhaust, pressure equalization and connection and exchange of two nitrogen-oxygen separation adsorption towers and an oxygen balance tank through one stepping motor, reduces the connecting pipeline and the control valve, and reduces the volume and the operation difficulty of the traditional pressure swing adsorption oxygen equipment, the convenience of use of the invention is improved.
Description
Technical Field
The invention belongs to the technical field of oxygen generation equipment; in particular to a working method of vacuum pressure swing adsorption oxygen equipment.
Background
A vacuum pressure swing adsorption oxygen equipment is a group of devices for making oxygen by using air, and its working process is characterized by that the air source is pressurized by means of fan and fed into nitrogen-oxygen separation adsorption tower, the oxygen in the air is separated from gases of nitrogen gas, etc. by means of nitrogen-oxygen separation adsorption tower, the separated oxygen gas is fed into balance tank and buffer tank, and fed into oxygen compressor, and then fed into customer site after being pressurized by means of oxygen compressor, and the separated gases of nitrogen gas, etc. are pumped out by means of vacuum pump and discharged into atmosphere The advent of vacuum pressure swing adsorption oxygen plants that increase energy utilization, reduce control complexity, and number of lines is at hand.
Disclosure of Invention
The invention aims to provide vacuum pressure swing adsorption oxygen equipment, which comprises a base, a liquid oxygen tank connecting pipe, an oxygen output pipe, an oxygen storage tank, a connecting pipeline, an oxygen compressor driving motor, a motor fixing frame, an oxygen balancing tank, a stepping motor, an adsorption system output adjusting device, a stepping motor fixing frame, an adsorption system pressure equalizing adjusting device, a first adsorption system tank, a connecting rotating shaft, an air inlet and exhaust circulation control device, a Roots blower set, a Roots blower driving device, a second adsorption system tank, an oxygen buffer tank, an unqualified emptying pipeline and an oxygen compressor, wherein the Roots blower driving device is embedded in the inner side of the head end of the base, the Roots blower set is fixed at the upper end of the base, the Roots blower driving device is in transmission connection with the Roots blower set, and the air inlet and exhaust circulation control, and air inlet and exhaust circulation control device and roots fan group through connection, the step motor mount is located air inlet and exhaust circulation control device both sides, and the step motor mount is vertical to be fixed in on the base up end, step motor is fixed in on the step motor mount up end, adsorption system output adjusting device locates the step motor downside, and adsorption system output adjusting device and step motor output shaft rotate to be connected, adsorption system voltage-sharing adjusting device is located adsorption system output adjusting device downside, and adsorption system voltage-sharing adjusting device and adsorption system output adjusting device lower extreme fixed connection, first adsorption system jar and second adsorption system jar symmetry are fixed in step motor mount both sides, and first adsorption system jar and second adsorption system jar all are located air inlet and exhaust circulation control device upside, first adsorption system jar and second adsorption system jar lower extreme all link up with air inlet and exhaust circulation control device The upper ends of the first adsorption system tank and the second adsorption system tank are communicated with an adsorption system output adjusting device and an adsorption system pressure-equalizing adjusting device, the adsorption system output adjusting device is communicated with the upper end of an oxygen balance tank through a pipeline, the lower end of the oxygen balance tank is communicated with an oxygen buffer tank through a pipeline, an unqualified vent pipeline is fixed on the side wall of the oxygen buffer tank and communicated with the oxygen buffer tank, the lower end of the oxygen buffer tank is communicated with the upper end of an oxygen storage tank through a connecting pipeline, the oxygen compressor is arranged on the connecting pipeline and fixedly connected with an output shaft of a driving motor of the oxygen compressor, the driving motor of the oxygen compressor is fixed on the base through a motor fixing frame, the lower end of the oxygen storage tank is fixed with an oxygen output pipe, and the oxygen output pipe is communicated with the oxygen storage tank, the side wall is fixed with liquid oxygen jar connecting pipe under the oxygen output tube, liquid oxygen jar connecting pipe upper end and oxygen output tube through connection, liquid oxygen jar connecting pipe lower extreme through connection has the liquid oxygen jar, the liquid oxygen jar is embedded in the base end.
Further, the output adjusting device of the adsorption system comprises an upper cover, a rotating shaft, an indirect gear, a round cover, a first arc-shaped pipeline, through holes, an adjusting device shell, a chassis, a round pipe, a second arc-shaped pipeline and inner side teeth, wherein the round cover and the chassis are both in a flat disc shape, the first arc-shaped pipeline and the second arc-shaped pipeline are symmetrically fixed on the chassis, the round cover is arranged on the upper side of the chassis and fixed on the upper side surfaces of the first arc-shaped pipeline and the second arc-shaped pipeline, the round pipe is fixed between the first arc-shaped pipeline and the second arc-shaped pipeline and arranged on the centers of the round cover and the chassis, the round pipe is a hollow cylinder without a top and a bottom, the upper end of the round pipe penetrates through the round cover, the lower end of the round pipe penetrates through the chassis, two groups of inner side teeth are intermittently fixed on the inner side wall of the round pipe, the adjusting device shell is a hollow cylinder shell, the integrated configuration of dome, chassis, first arc pipeline and second arc pipeline rotates and is fixed in the adjusting device shell, and is three the through-hole cooperatees with arbitrary three port in first arc pipeline and the second arc pipeline respectively, indirect gear sleeve is on the rotation axis, the pipe is inboard is located to the rotation axis, and the rotation axis lower extreme runs through the inboard bottom surface of adjusting device shell, the rotation axis upper end is stretched in the dome upside, indirect gear rotation locates in the pipe, and indirect gear and the inside lateral wall inside tooth of pipe mesh mutually, the upper cover rotates the cover on the rotation axis, and the upper cover cooperatees with the dome, rotation axis upper end and step motor output shaft fixed connection.
Further, the pressure equalizing and adjusting device of the adsorption system comprises a pressure equalizing and adjusting shaft, a sealing cover, a pressure equalizing and adjusting indirect gear, a pressure equalizing and adjusting inner side tooth, a rotating ring, a pressure equalizing and adjusting through hole, a pressure equalizing and adjusting shell and a pressure equalizing and adjusting shell through hole, wherein the rotating ring is in a hollow ring shape, four through holes are uniformly arranged on the outer side wall of the rotating ring, the four through holes are symmetrically arranged in pairs, the pressure equalizing and adjusting inner side tooth is intermittently arranged on the inner side wall of the rotating ring, the pressure equalizing and adjusting indirect gear is sleeved on the pressure equalizing and adjusting shaft, the pressure equalizing and adjusting shell is a non-top bottom cylinder, two pressure equalizing and adjusting shell through holes which are symmetrically communicated are arranged on the outer side wall of the pressure equalizing and adjusting shell, the rotating ring is rotatably fixed in the pressure equalizing and adjusting shell, the, the pressure-equalizing regulating device is characterized in that the lower end of the pressure-equalizing regulating shaft penetrates through the lower end face of the pressure-equalizing regulating shell, the upper end of the pressure-equalizing regulating shaft extends to the upper side of the rotating ring, the sealing cover is rotatably sleeved on the upper end of the pressure-equalizing regulating shaft, the sealing cover is matched with the upper end of the rotating ring, the pressure-equalizing regulating indirect gear is meshed with the pressure-equalizing regulating internal side teeth, the lower end of the pressure-equalizing regulating shaft is fixedly connected with the upper end of the connecting rotating shaft, and the.
Further, the first adsorption system tank comprises a pressure equalizing pipeline, an adsorption system oxygen output pipeline, an adsorption system upper cover, an adsorption system shell and a gas input and discharge pipeline, the adsorption system upper cover is matched with the upper end of the adsorption system shell, the gas input and discharge pipeline is fixed at the lower end of the adsorption system shell and is in through connection with the adsorption system shell, the pressure equalizing pipeline and the adsorption system oxygen output pipeline are fixed on the upper end face of the adsorption system upper cover and are in through connection with the adsorption system shell, the pressure equalizing pipeline is in through connection with any one of the two pressure equalizing adjusting through holes, and the adsorption system oxygen output pipeline is in through connection with any one of the three through holes.
Further, the air intake and exhaust circulation control device comprises a circulation control indirect gear, circulation control inner side teeth, a cylindrical shell, a circulation control body, a two-position two-way pipe and a limiting ring, wherein the two-position two-way pipe is composed of two arc-shaped through pipes which are symmetrically fixed, the circulation control body is a cylinder, the limiting ring is a circular convex ring with the cross section being L, the limiting ring is fixed on the lower end face of the circulation control body, the two-position two-way pipe is embedded in the circulation control body and is communicated with the outer side wall of the circulation control body, the cylindrical shell is a cylinder without a top and a bottom, the cylindrical shell is fixed on the upper end face of the circulation control body, the circulation control inner side teeth are intermittently arranged in the cylindrical shell, the circulation control indirect gear is rotationally fixed in the cylindrical shell, and the circulation control indirect gear is meshed with the circulation control inner side teeth, the upper end of the circulation control indirect gear is fixedly connected with the lower end of the connecting rotating shaft.
Further, the Roots blower set comprises a first belt pulley, a Roots blower, an exhaust blower input pipeline, a blower output pipeline fixing frame, a blower output pipeline, a blower input pipeline, a Roots blower, a second belt pulley, a serpentine cooling pipe, a water tank, an exhaust blower input pipeline fixing frame, an exhaust blower output pipeline and a silencer, wherein the first belt pulley is fixed on a Roots blower rotating shaft, the first belt pulley is positioned outside the Roots blower, one end of the Roots blower is communicated with the exhaust blower output pipeline, the other end of the Roots blower is connected with one end of the two-position two-way pipe in a matching way through the exhaust blower input pipeline, the blower output pipeline is connected with one end of the two-position two-way pipe which is not communicated with the exhaust blower input pipeline in a matching way, the other end of the blower output pipeline is communicated with the end of the serpentine cooling pipe, and the serpentine, and the head end of the serpentine cooling pipe is in through connection with one end of the Roots blower, the other end of the Roots blower is in through connection with an input pipeline of the blower, the second belt pulley is fixedly connected with a rotating shaft of the Roots blower, and the second belt pulley is arranged on the outer side of the Roots blower.
Furthermore, the roots blower driving device comprises a first belt, a first driving belt pulley, a blower driving motor, a second belt, a second driving belt pulley and a blower driving motor output shaft, wherein the blower driving motor is a double-end motor, the first driving belt pulley and the second driving belt pulley are respectively fixed on the blower driving motor output shafts at the two ends of the blower driving motor, the first driving belt pulley is in transmission connection with the first belt pulley through the first belt, and the second driving belt pulley is in transmission connection with the second belt pulley through the second belt.
Further, the working steps of the vacuum pressure swing adsorption oxygen equipment are as follows:
1) starting the equipment, and driving a motor to rotate by a fan;
2) the fan drives the motor to rotate, so as to drive the first driving belt pulley and the second driving belt pulley to rotate, and further drive the first belt pulley and the second belt pulley to rotate;
3) the first belt pulley and the second belt pulley rotate to drive the Roots exhaust fan and the Roots blower to start, the Roots blower starts, air is sucked and compressed by the blower input pipeline, the compressed air carries out heat exchange through the serpentine cooling pipe and then enters the air inlet and exhaust circulation control device through the blower output pipeline;
4) the gas enters a second adsorption system tank through a two-position two-way pipe in the gas inlet and exhaust circulation control device, oxygen enters an adsorption system output adjusting device through an adsorption system oxygen output pipeline through pressurization, enters an oxygen balance tank through the adsorption system output adjusting device and sequentially enters an oxygen buffer tank, unqualified gas is discharged through an unqualified emptying pipeline, qualified gas is input into an oxygen storage tank through a connecting pipeline through a rotating shaft and is supplied for use through an oxygen output pipe, and oxygen can be supplied through a liquid oxygen tank when oxygen is insufficient;
5) starting the Roots exhaust fan, vacuumizing the first adsorption system tank through a two-position two-way pipe in the air intake and exhaust circulation control device by an exhaust fan input pipeline, discharging nitrogen and the like from the first adsorption system tank at the moment, discharging the nitrogen from an exhaust fan output pipeline through the Roots exhaust fan, and silencing by a silencer;
6) when the pressure in the first adsorption system tank reaches-55 kpa, the stepping motor rotates for a certain angle and drives the rotating shaft, the pressure equalizing adjusting shaft and the connecting rotating shaft to rotate;
7) at the moment, the indirect gear is not meshed with the inner side teeth, the first arc-shaped pipeline does not rotate, the second adsorption system tank is still communicated with the oxygen balance tank, meanwhile, the pressure equalizing adjustment indirect gear is meshed with the pressure equalizing adjustment inner side teeth and rotates for a certain angle, so that the second adsorption system tank is communicated with the first adsorption system tank through the pressure equalizing pipeline, pressure equalization is further performed, meanwhile, the circulation control indirect gear is not meshed with the circulation control inner side teeth, the circulation control body does not rotate, the Roots exhaust fan is still connected with the first adsorption system tank, and the Roots blower is still connected with the second adsorption system tank;
8) after the pressure equalization is finished, the stepping motor rotates for a certain angle again, and drives the rotating shaft, the pressure equalization adjusting shaft and the connecting rotating shaft to rotate;
9) at the moment, the indirect gear is meshed with the inner side teeth, the first arc-shaped pipeline rotates, the second adsorption system tank is connected with the oxygen balance tank in a closed mode, the first adsorption system tank is communicated with the oxygen balance tank, meanwhile, the pressure-equalizing adjustment indirect gear is meshed with the pressure-equalizing adjustment inner side teeth and rotates for a certain angle, the second adsorption system tank is disconnected from the first adsorption system tank through the adsorption system pressure-equalizing adjustment device, the circulation control indirect gear is meshed with the circulation control inner side teeth to drive the circulation control body to rotate, the Roots exhaust fan is connected with the second adsorption system tank, and the Roots blower is connected with the first adsorption system tank;
10) at the moment, air is sucked and compressed by an air blower input pipeline, the compressed air carries out heat exchange through a serpentine cooling pipe, then enters an air inlet and outlet circulation control device through an air blower output pipeline, enters a first adsorption system tank through a two-position two-way pipe in the air inlet and outlet circulation control device, is pressurized to enable oxygen to enter an adsorption system output adjusting device through an adsorption system oxygen output pipeline, and enters an oxygen balancing tank through an adsorption system output adjusting device;
11) starting the Roots exhaust fan, vacuumizing the second adsorption system tank through a two-position two-way pipe in the air intake and exhaust circulation control device by an exhaust fan input pipeline, discharging nitrogen and the like from the second adsorption system tank at the moment, discharging the nitrogen from an exhaust fan output pipeline through the Roots exhaust fan, and silencing by a silencer;
12) when the pressure in the second adsorption system tank reaches-55 kpa, the stepping motor rotates for a certain angle and drives the rotating shaft, the pressure equalizing adjusting shaft and the connecting rotating shaft to rotate;
13) and (5) repeating the step 3) to the step 13) to realize the circular uninterrupted oxygen generation.
The invention has the beneficial effects that: the invention is provided with a Roots blower set and a Roots blower driving device, thereby greatly reducing the usage amount of the motors, two blowers are driven by the same motor, greatly reducing the energy consumption, improving the resource utilization rate and reducing the working cost, adopting a single motor to greatly reduce the volume of the equipment and reduce the occupied space, the invention is provided with an air inlet and exhaust circulation control device, so that two nitrogen and oxygen separation adsorption towers can be randomly exchanged and connected with a Roots exhaust fan and a Roots blower through the air inlet and exhaust circulation control device, the connecting pipelines and control valves with the Roots exhaust fan and the Roots blower are reduced, the product volume is further reduced, the invention is provided with an adsorption system output adjusting device, so that the invention can realize the replacement connection of the two nitrogen and oxygen separation adsorption towers and an oxygen balance tank by rotating the adsorption system output adjusting device, and the pipelines and control valves for connecting the two nitrogen and oxygen separation adsorption towers and, the invention further reduces the product volume, and is provided with a stepping motor, an adsorption system output adjusting device, an adsorption system pressure equalizing adjusting device and an air inlet and exhaust circulation control device, so that the invention realizes air inlet and exhaust, pressure equalization and connection exchange control of two nitrogen-oxygen separation adsorption towers and an oxygen balance tank through one stepping motor, greatly reduces connecting pipelines and control valves, reduces the volume and control steps of the traditional air pressure swing adsorption oxygen equipment, and improves the use convenience of the invention.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic view of the general construction of a vacuum pressure swing adsorption oxygen plant of the present invention;
FIG. 2 is a schematic diagram of the output regulating device of the adsorption system of the vacuum pressure swing adsorption oxygen equipment of the present invention;
FIG. 3 is a schematic structural diagram of a pressure equalizing and regulating device of an adsorption system of the vacuum pressure swing adsorption oxygen equipment of the present invention;
FIG. 4 is a schematic diagram of the configuration of the first adsorption system tank of the vacuum pressure swing adsorption oxygen plant of the present invention;
FIG. 5 is a schematic structural diagram of an intake and exhaust circulation control device of the vacuum pressure swing adsorption oxygen equipment of the present invention;
FIG. 6 is a schematic structural diagram of a Roots blower unit of the vacuum pressure swing adsorption oxygen equipment of the invention;
FIG. 7 is a schematic structural diagram of a Roots blower driving device of a vacuum pressure swing adsorption oxygen plant of the present invention.
Detailed Description
Referring to fig. 1-7, a vacuum pressure swing adsorption oxygen equipment includes a base 1, a liquid oxygen tank 2, a liquid oxygen tank connection pipe 3, an oxygen output pipe 4, an oxygen storage tank 5, a connection pipe 6, an oxygen compressor driving motor 7, a motor fixing frame 8, an oxygen balance tank 9, a stepping motor 10, an adsorption system output adjusting device 11, a stepping motor fixing frame 12, an adsorption system pressure equalizing adjusting device 13, a first adsorption system tank 14, a connection rotation shaft 15, an air intake and exhaust circulation control device 16, a roots blower unit 17, a roots blower driving device 18, a second adsorption system tank 19, an oxygen buffer tank 110, an unqualified emptying pipe 111 and an oxygen compressor 112, wherein the roots blower driving device 18 is embedded inside the head end of the base 1, the roots blower unit 17 is fixed on the upper end of the base 1, the roots blower driving device 18 is in transmission connection with the roots blower unit 17, the air inlet and exhaust circulation control device 16 is fixed at the upper end of a Roots blower unit 17, the air inlet and exhaust circulation control device 16 is connected with the Roots blower unit 17 in a penetrating way, a stepping motor fixing frame 12 is positioned at two sides of the air inlet and exhaust circulation control device 16, the stepping motor fixing frame 12 is vertically fixed on the upper end surface of a base 1, a stepping motor 10 is fixed on the upper end surface of the stepping motor fixing frame 12, an adsorption system output adjusting device 11 is arranged at the lower side of the stepping motor 10, an adsorption system output adjusting device 11 is rotationally connected with an output shaft of the stepping motor 10, an adsorption system pressure equalizing adjusting device 13 is positioned at the lower side of the adsorption system output adjusting device 11, the adsorption system pressure equalizing adjusting device 13 is fixedly connected with the lower end of the adsorption system output adjusting device 11, a first adsorption system tank 14 and a second adsorption system tank 19 are symmetrically fixed at two sides of the stepping motor fixing frame 12, and the first adsorption system tank, the lower ends of a first adsorption system tank 14 and a second adsorption system tank 19 are communicated with an air inlet and exhaust circulation control device 16, the upper ends of the first adsorption system tank 14 and the second adsorption system tank 19 are communicated with an adsorption system output adjusting device 11 and an adsorption system pressure equalizing adjusting device 13, the adsorption system output adjusting device 11 is communicated with the upper end of an oxygen balance tank 9 through a pipeline, the lower end of the oxygen balance tank 9 is communicated with an oxygen buffer tank 110 through a pipeline, an unqualified emptying pipeline 111 is fixed on the side wall of the oxygen buffer tank 110, the unqualified emptying pipeline 111 is communicated with the oxygen buffer tank 110, the lower end of the oxygen buffer tank 110 is communicated with the upper end of an oxygen storage tank 5 through a connecting pipeline 6, an oxygen compressor 112 is arranged on the connecting pipeline 6, the oxygen compressor 112 is fixedly connected with an output shaft of an oxygen compressor driving motor 7, the oxygen compressor driving motor 7 is fixed on a base 1 through a motor fixing frame 8, oxygen storage jar 5 lower extreme is fixed with oxygen output tube 4, and oxygen output tube 4 and oxygen storage jar 5 through connection, and the lateral wall is fixed with liquid oxygen jar connecting pipe 3 under oxygen output tube 4, and 3 upper ends of liquid oxygen jar connecting pipe and oxygen output tube 4 through connection, 3 lower extremes of liquid oxygen jar connecting pipe through connection have liquid oxygen jar 2, and liquid oxygen jar 2 is embedded in 1 end of base.
As shown in fig. 2, the output adjusting device 11 of the adsorption system includes an upper cover 1101, a rotating shaft 1102, an indirect gear 1103, a round cover 1104, a first arc-shaped conduit 1105, a through hole 1106, an adjusting device housing 1107, a chassis 1108, a circular tube 1109, a second arc-shaped conduit 1110 and inner teeth 1111, wherein the round cover 1104 and the chassis 1108 are both flat disk-shaped, the first arc-shaped conduit 1105 and the second arc-shaped conduit 1110 are symmetrically fixed on the chassis 1108, the round cover 1104 is arranged on the upper side of the chassis 1108 and fixed on the upper side surfaces of the first arc-shaped conduit 1105 and the second arc-shaped conduit 1110, the circular tube 1109 is fixed between the first arc-shaped conduit 1105 and the second arc-shaped conduit 1110 and arranged on the centers of the round cover 1104 and the chassis 1108, the circular tube 1109 is a hollow cylinder without top and bottom, the upper end of the circular tube 1109 penetrates through the round cover, the lower end of the circular tube 1109 penetrates through the chassis 1108, two sets of inner teeth 1111 are intermittently fixed on, three through holes 1106 are distributed on the outer side wall of the adjusting device shell 1107, a round cover 1104, a chassis 1108, the combined structure of the first arc-shaped pipeline 1105 and the second arc-shaped pipeline 1110 is rotationally fixed in the adjusting device shell 1107, the three through holes 1106 are respectively matched with any three ports in the first arc-shaped pipeline 1105 and the second arc-shaped pipeline 1110, the indirect gear 1103 is sleeved on the rotating shaft 1102, the rotating shaft 1102 is arranged on the inner side of the circular pipe 1109, the lower end of the rotating shaft 1102 penetrates through the inner bottom surface of the adjusting device shell 1107, the upper end of the rotating shaft 1102 extends to the upper side of the round cover 1104, the indirect gear 1103 is rotationally arranged in the circular pipe 1109, the indirect gear 1103 is meshed with the inner side teeth 1111 of the inner side wall of the circular pipe 1109, the upper cover 1101 is rotationally sleeved on the rotating shaft 1102, the upper cover 1101 is matched with the.
As shown in fig. 3, the pressure equalizing and adjusting device 13 of the adsorption system comprises a pressure equalizing and adjusting shaft 131, a sealing cover 132, an indirect pressure equalizing and adjusting gear 133, an inner tooth 134 of the pressure equalizing and adjusting, a rotating ring 135, a pressure equalizing and adjusting through hole 136, a pressure equalizing and adjusting housing 137 and a pressure equalizing and adjusting housing through hole 138, wherein the rotating ring 135 is hollow and circular, four through holes are uniformly arranged on the outer side wall of the rotating ring 135, the four through holes are arranged symmetrically in pairs, the inner tooth 134 of the pressure equalizing and adjusting is intermittently arranged on the inner side wall of the rotating ring 135, the indirect pressure equalizing and adjusting gear 133 is sleeved on the pressure equalizing and adjusting shaft 131, the pressure equalizing and adjusting housing 137 is a non-top bottom cylinder, two symmetrical through holes 138 of the pressure equalizing and adjusting housing are arranged on the outer side wall of the pressure equalizing and adjusting housing 137, the rotating ring 135 is rotatably fixed in the, the lower end of the pressure equalizing adjusting shaft 131 penetrates through the lower end face of the pressure equalizing adjusting shell 137, the upper end of the pressure equalizing adjusting shaft 131 extends to the upper side of the rotating ring 135, the sealing cover 132 is rotatably sleeved at the upper end of the pressure equalizing adjusting shaft 131, the sealing cover 132 is matched with the upper end of the rotating ring 135, the pressure equalizing adjusting indirect gear 133 is meshed with the pressure equalizing adjusting inner side teeth 134, the lower end of the pressure equalizing adjusting shaft 131 is fixedly connected with the upper end of the connecting rotating shaft 15, and the upper end of the pressure equalizing adjusting shaft 131 is fixedly connected with the.
As shown in fig. 4, the first adsorption system tank 14 includes a pressure equalizing pipe 141, an adsorption system oxygen output pipe 142, an adsorption system upper cover 143, an adsorption system housing 144, and a gas input/output pipe 145, the adsorption system upper cover 143 is fitted to the upper end of the adsorption system housing 144, the gas input/output pipe 145 is fixed to the lower end of the adsorption system housing 144, the gas input/output pipe 145 is connected to the adsorption system housing 144 in a penetrating manner, the pressure equalizing pipe 141 and the adsorption system oxygen output pipe 142 are both fixed to the upper end face of the adsorption system upper cover 143, the pressure equalizing pipe 141 and the adsorption system oxygen output pipe 142 are connected to the adsorption system housing 144 in a penetrating manner, the pressure equalizing pipe 141 is connected to any one of the two pressure equalizing/regulating through holes 136, and the adsorption system oxygen output pipe 142 is connected to any one of the three.
As shown in fig. 5, the intake and exhaust circulation control device 16 includes a circulation control indirect gear 161, circulation control inner teeth 162, a cylindrical housing 163, a circulation control body 164, a two-position two-way pipe 165 and a limit ring 166, the two-position two-way pipe 165 is composed of two symmetrically fixed arc-shaped through pipes, the circulation control body 164 is a cylinder, the limit ring 166 is a circular convex ring with a cross section of L, the limit ring 166 is fixed on the lower end surface of the circulation control body 164, the two-position two-way pipe 165 is embedded in the circulation control body 164, the two-position two-way pipe 165 is connected with the outer side wall of the circulation control body 164 in a penetrating manner, the cylindrical housing 163 is a cylinder without a top and a bottom, the cylindrical housing 163 is fixed on the upper end surface of the circulation control body 164, the circulation control inner teeth 162 are intermittently arranged inside the cylindrical housing 163, the circulation control indirect gear 161 is rotationally fixed inside the cylindrical housing 163, and the circulation control indirect gear 161, the upper end of the indirect gear 161 for circulation control is fixedly connected with the lower end of the connecting rotating shaft 15.
As shown in fig. 6, the roots blower unit 17 includes a first belt pulley 171, a roots blower 172, a blower input pipe 173, a blower output pipe fixing frame 174, a blower output pipe 175, a blower input pipe 176, a roots blower 177, a second belt pulley 178, a serpentine cooling pipe 179, a water tank 1710, a blower input pipe fixing frame 1711, a blower output pipe 1712 and a silencer 1713, the first belt pulley 171 is fixed on a rotation shaft of the roots blower 172, the first belt pulley 171 is located outside the roots blower 172, one end of the roots blower 172 is connected to the blower output pipe 1712 in a penetrating manner, the other end of the roots blower 172 is connected to one end of a two-position two-way pipe 165 in a fitting manner through the blower input pipe 173, the blower output pipe 175 is connected to one end of the two-position two-way pipe 165 which is not connected to the blower input pipe 173 in a fitting manner, the other end of the blower output pipe 175 is connected to the end, the serpentine cooling tube 179 is disposed within the water tank 1710, and the serpentine cooling tube 179 has a head end in communication with one end of the ROOTS blower 177, the other end of the ROOTS blower 177 in communication with the blower input conduit 176, a second pulley 178 fixedly connected to the axis of rotation of the ROOTS blower 177, and the second pulley 178 disposed outside the ROOTS blower 177.
As shown in fig. 7, the roots blower driving device 18 includes a first belt 181, a first driving pulley 182, a blower driving motor 183, a second belt 184, a second driving pulley 185, and a blower driving motor output shaft 186, wherein the blower driving motor 183 is a double-head motor, the blower driving motor output shaft 186 at two ends of the blower driving motor 183 is respectively fixed with the first driving pulley 182 and the second driving pulley 185, the first driving pulley 182 is in transmission connection with the first belt 171 through the first belt 181, and the second driving pulley 185 is in transmission connection with the second belt 178 through the second belt 184.
The working steps of the vacuum pressure swing adsorption oxygen equipment are as follows:
1) starting the device, fan drive motor 183 rotates;
2) the fan driving motor 183 rotates to drive the first driving pulley 182 and the second driving pulley 185 to rotate, and further drive the first pulley 171 and the second pulley 178 to rotate;
3) the first pulley 171 and the second pulley 178 rotate to drive the roots blower 172 and the roots blower 177 to start, the roots blower 177 starts to suck air from the blower input pipe 176 and compress the air, and the compressed air is heat exchanged through the serpentine cooling pipe 179 and then enters the intake and exhaust circulation control device 16 through the blower output pipe 175;
4) the gas enters the second adsorption system tank 19 through a two-position two-way pipe 165 in the gas inlet and exhaust circulation control device 16, oxygen enters the adsorption system output adjusting device 11 through the adsorption system oxygen output pipeline 142 through pressurization, enters the oxygen balancing tank 9 through the adsorption system output adjusting device 11, and sequentially enters the oxygen buffer tank 110, unqualified gas is discharged through the unqualified emptying pipeline 111, qualified gas is input into the oxygen storage tank 5 through the connecting pipeline 6 through the rotating shaft 1102 and is supplied for use through the oxygen output pipe 4, and oxygen can be supplied through the liquid oxygen tank 2 when oxygen is insufficient;
5) starting the roots exhaust fan 172, vacuumizing the first adsorption system tank 14 through a two-position two-way pipe 165 in the air intake and exhaust circulation control device 16 by an exhaust fan input pipeline 173, discharging nitrogen and the like from the first adsorption system tank 14 at the moment, discharging the nitrogen from an exhaust fan output pipeline 1712 through the roots exhaust fan 172, and silencing by a silencer 1713;
6) when the pressure in the first adsorption system tank 14 reaches-55 kpa, the stepping motor 10 rotates by a certain angle, and the stepping motor 10 drives the rotating shaft 1102, the pressure equalizing adjusting shaft 131 and the connecting rotating shaft 15 to rotate;
7) at the moment, the indirect gear 1103 is not meshed with the inner side teeth 1111, the first arc-shaped pipeline 1105 does not rotate, the second adsorption system tank 19 is still communicated with the oxygen balance tank 9, meanwhile, the pressure equalizing adjustment indirect gear 133 is meshed with the pressure equalizing adjustment inner side teeth 134 and rotates for a certain angle, so that the second adsorption system tank 19 is communicated with the first adsorption system tank 14 through the pressure equalizing pipeline 141, pressure equalization is further performed, meanwhile, the circulation control indirect gear 161 is not meshed with the circulation control inner side teeth 162, the circulation control body 164 does not rotate, the Roots blower 172 is still connected with the first adsorption system tank 14, and the Roots blower 177 is still connected with the second adsorption system tank 19;
8) after the pressure equalization is completed, the stepping motor 10 rotates for a certain angle again, and the stepping motor 10 drives the rotating shaft 1102, the pressure equalization adjusting shaft 131 and the connecting rotating shaft 15 to rotate;
9) at the moment, the indirect gear 1103 is meshed with the inner side teeth 1111, the first arc-shaped pipeline 1105 rotates, the second adsorption system tank 19 is connected with the oxygen balance tank 9 in a closed manner, the first adsorption system tank 14 is communicated with the oxygen balance tank 9, meanwhile, the pressure equalizing adjustment indirect gear 133 is meshed with the pressure equalizing adjustment inner side teeth 134 and rotates for a certain angle, so that the second adsorption system tank 19 is disconnected from the first adsorption system tank 14 through the adsorption system pressure equalizing adjustment device 13, the circulation control indirect gear 161 is meshed with the circulation control inner side teeth 162 to drive the circulation control body 164 to rotate, the Roots blower 172 is connected with the second adsorption system tank 19, and the Roots blower 177 is connected with the first adsorption system tank 14;
10) at this time, air is sucked and compressed by a blower input pipeline 176, the compressed air exchanges heat through a serpentine cooling pipe 179, then enters the air inlet and outlet circulation control device 16 through a blower output pipeline 175, enters the first adsorption system tank 14 through a two-position two-way pipe 165 in the air inlet and outlet circulation control device 16, and is pressurized to enable oxygen to enter the adsorption system output adjusting device 11 through an adsorption system oxygen output pipeline 142 and enter the oxygen balancing tank 9 through the adsorption system output adjusting device 11;
11) the roots exhaust blower 172 is started, the exhaust blower input pipeline 173 vacuumizes the second adsorption system tank 19 through the two-position two-way pipe 165 in the air intake and exhaust circulation control device 16, at this time, the second adsorption system tank 19 starts to exhaust nitrogen and the like, the nitrogen is exhausted from the exhaust blower output pipeline 1712 through the roots exhaust blower 172 and is silenced through the silencer 1713;
12) when the pressure in the second adsorption system tank 19 reaches-55 kpa, the stepping motor 10 rotates by a certain angle, and the stepping motor 10 drives the rotating shaft 1102, the pressure equalizing adjusting shaft 131 and the connecting rotating shaft 15 to rotate;
13) and (5) repeating the step 3) to the step 13) to realize the circular uninterrupted oxygen generation.
The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the following claims.
Claims (1)
1. A working method of vacuum pressure swing adsorption oxygen equipment is characterized by comprising the following specific working steps:
starting the equipment, and driving a motor (183) to rotate by a fan;
the fan driving motor (183) rotates to drive the first driving belt pulley (182) and the second driving belt pulley (185) to rotate, and further drive the first belt pulley (171) and the second belt pulley (178) to rotate;
the first belt pulley (171) and the second belt pulley (178) rotate to drive the Roots blower (172) and the Roots blower (177) to start, the Roots blower (177) starts, air is sucked and compressed through the blower input pipeline (176), the compressed air is subjected to heat exchange through the serpentine cooling pipe (179), and then enters the air inlet and exhaust circulation control device (16) through the blower output pipeline (175);
air enters a second adsorption system tank (19) through a two-position two-way pipe (165) in an air intake and exhaust circulation control device (16), oxygen enters an adsorption system output adjusting device (11) through an adsorption system oxygen output pipeline (142) through pressurization, enters an oxygen balance tank (9) through the adsorption system output adjusting device (11), and sequentially enters an oxygen buffer tank (110), unqualified gas is discharged through an unqualified emptying pipeline (111), qualified gas is input into an oxygen storage tank (5) through a connecting pipeline (6) through a rotating shaft (1102) and is supplied for use through an oxygen output pipe (4), and oxygen can be supplied through a liquid oxygen tank (2) when oxygen is insufficient;
starting a Roots exhaust fan (172), vacuumizing a first adsorption system tank (14) through a two-position two-way pipe (165) in an air intake and exhaust circulation control device (16) by an exhaust fan input pipeline (173), discharging nitrogen and the like from the first adsorption system tank (14), discharging the nitrogen from an exhaust fan output pipeline (1712) through the Roots exhaust fan (172), and silencing by a silencer (1713);
when the pressure in the first adsorption system tank (14) reaches-55 KPa, the stepping motor (10) rotates for a certain angle, and the stepping motor (10) drives the rotating shaft (1102), the pressure equalizing adjusting shaft (131) and the connecting rotating shaft (15) to rotate;
at the moment, the indirect gear (1103) is not meshed with the inner side teeth (1111), the first arc-shaped pipeline (1105) does not rotate, the second adsorption system tank (19) is still communicated with the oxygen balance tank (9), meanwhile, the pressure equalizing adjustment indirect gear (133) is meshed with the pressure equalizing adjustment inner side teeth (134) and rotates for a certain angle, the second adsorption system tank (19) is communicated with the first adsorption system tank (14) through the pressure equalizing pipeline (141), pressure equalizing is further performed, meanwhile, the circulation control indirect gear (161) is not meshed with the circulation control inner side teeth (162), the circulation control body (164) does not rotate, the Roots blower (172) is still connected with the first adsorption system tank (14), and the Roots blower (177) is still connected with the second adsorption system tank (19);
after the pressure equalization is finished, the stepping motor (10) rotates for a certain angle again, and the stepping motor (10) drives the rotating shaft (1102), the pressure equalization adjusting shaft (131) and the connecting rotating shaft (15) to rotate;
at the moment, the indirect gear (1103) is meshed with the inner side teeth (1111), the first arc-shaped pipeline (1105) rotates, the second adsorption system tank (19) is connected with the oxygen balance tank (9) in a closed mode, the first adsorption system tank (14) is communicated with the oxygen balance tank (9), the pressure equalizing adjustment indirect gear (133) is meshed with the pressure equalizing adjustment inner side teeth (134) and rotates for a certain angle, the second adsorption system tank (19) is disconnected from the first adsorption system tank (14) through the adsorption system pressure equalizing adjusting device (13), the circulation control indirect gear (161) is meshed with the circulation control inner side teeth (162) to drive the circulation control body (164) to rotate, the Roots blower (172) is connected with the second adsorption system tank (19), and the Roots blower (177) is connected with the first adsorption system tank (14);
at the moment, air is sucked and compressed through a blower input pipeline (176), the compressed air is subjected to heat exchange through a serpentine cooling pipe (179), then enters an air inlet and outlet circulation control device (16) through a blower output pipeline (175), enters a first adsorption system tank (14) through a two-position two-way pipe (165) in the air inlet and outlet circulation control device (16), oxygen enters an adsorption system output adjusting device (11) through an adsorption system oxygen output pipeline (142) through pressurization, and enters an oxygen balance tank (9) through the adsorption system output adjusting device (11);
starting a Roots exhaust fan (172), vacuumizing the second adsorption system tank (19) through a two-position two-way pipe (165) in the air intake and exhaust circulation control device (16) by an exhaust fan input pipeline (173), discharging nitrogen and the like from the second adsorption system tank (19), discharging the nitrogen from an exhaust fan output pipeline (1712) through the Roots exhaust fan (172), and silencing by a silencer (1713);
when the pressure in the second adsorption system tank (19) reaches-55 KPa, the stepping motor (10) rotates for a certain angle, and the stepping motor (10) drives the rotating shaft (1102), the pressure equalizing adjusting shaft (131) and the connecting rotating shaft (15) to rotate;
and (5) repeating the step 3) to the step 13) to realize the circular uninterrupted oxygen generation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010882251.2A CN111943145B (en) | 2020-08-28 | 2020-08-28 | Working method of vacuum pressure swing adsorption oxygen equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010882251.2A CN111943145B (en) | 2020-08-28 | 2020-08-28 | Working method of vacuum pressure swing adsorption oxygen equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111943145A true CN111943145A (en) | 2020-11-17 |
| CN111943145B CN111943145B (en) | 2022-04-29 |
Family
ID=73366609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010882251.2A Active CN111943145B (en) | 2020-08-28 | 2020-08-28 | Working method of vacuum pressure swing adsorption oxygen equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111943145B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113230823A (en) * | 2021-05-13 | 2021-08-10 | 成都联帮医疗科技股份有限公司 | Multi-channel airflow switching device for medical molecular sieve oxygen generation system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201825725U (en) * | 2010-10-28 | 2011-05-11 | 昆山锦程气体设备有限公司 | Vacuum pressure swing adsorption system for oxygen production |
| CN203558846U (en) * | 2013-08-29 | 2014-04-23 | 阳谷祥光铜业有限公司 | Pressure swing adsorption vacuum-desorption oxygen generation device |
| JP2016215088A (en) * | 2015-05-15 | 2016-12-22 | 株式会社日立産機システム | Gas separator and method for cooling compressor used therefor |
| CN106365123A (en) * | 2016-08-27 | 2017-02-01 | 成都联帮医疗科技股份有限公司 | Single-lobe-pump dual-action medical molecular sieve oxygen generating system and oxygen generating method |
| CN106672906A (en) * | 2016-12-28 | 2017-05-17 | 北京金大万翔环保科技有限公司 | Apparatus and method for preparing oxygen through two tower low pressure adsorption and vacuum desorption |
-
2020
- 2020-08-28 CN CN202010882251.2A patent/CN111943145B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201825725U (en) * | 2010-10-28 | 2011-05-11 | 昆山锦程气体设备有限公司 | Vacuum pressure swing adsorption system for oxygen production |
| CN203558846U (en) * | 2013-08-29 | 2014-04-23 | 阳谷祥光铜业有限公司 | Pressure swing adsorption vacuum-desorption oxygen generation device |
| JP2016215088A (en) * | 2015-05-15 | 2016-12-22 | 株式会社日立産機システム | Gas separator and method for cooling compressor used therefor |
| CN106365123A (en) * | 2016-08-27 | 2017-02-01 | 成都联帮医疗科技股份有限公司 | Single-lobe-pump dual-action medical molecular sieve oxygen generating system and oxygen generating method |
| CN106672906A (en) * | 2016-12-28 | 2017-05-17 | 北京金大万翔环保科技有限公司 | Apparatus and method for preparing oxygen through two tower low pressure adsorption and vacuum desorption |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113230823A (en) * | 2021-05-13 | 2021-08-10 | 成都联帮医疗科技股份有限公司 | Multi-channel airflow switching device for medical molecular sieve oxygen generation system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111943145B (en) | 2022-04-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111943145B (en) | Working method of vacuum pressure swing adsorption oxygen equipment | |
| CN205025709U (en) | Pressure boost centrifugal pump | |
| CN111943146B (en) | Vacuum pressure swing adsorption oxygen equipment | |
| CN201335003Y (en) | Air compressor | |
| CN106321468B (en) | Multi-shaft centrifugal compressor | |
| CN215245767U (en) | Air pump unit, air pump module and vacuum sealing machine | |
| CN201184289Y (en) | Diaphragm pump | |
| CN215292789U (en) | Piston type air compressor | |
| CN213865614U (en) | High-efficiency aeration device for sewage treatment | |
| CN213394632U (en) | Low-resistance tank type heat recoverer | |
| CN209724657U (en) | A kind of oil-free oscillating-chip air compressor machine and a kind of device | |
| CN208311034U (en) | A kind of scroll compressor | |
| CN210051180U (en) | Energy-efficient vacuum unit of power plant's condenser evacuation | |
| CN114506002B (en) | Vaccine insulation can foaming production facility | |
| CN216589046U (en) | Adjusting device for improving steam volume of compressor through partition plate and rotor of compressor | |
| CN220060043U (en) | Muffler for hotel ventilator | |
| US20120045347A1 (en) | Air Compressor | |
| CN211290705U (en) | High-efficiency condensing motor for refrigerator | |
| CN214744207U (en) | Roots blower convenient to move | |
| CN208917303U (en) | A kind of vacuum coating vacuum pump | |
| CN220758600U (en) | Pressure swing adsorption oxygen generator | |
| CN215320007U (en) | Special steam chamber for tyre vulcanizer | |
| CN1764497A (en) | Suction filter, turbo compressor, and method of packaging the compressor | |
| CN211255451U (en) | Rotary air blower for stirring and aeration of industrial sewage treatment system | |
| CN108661784A (en) | A kind of simple and mechanical device of automotive air intake turbocharging |
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 | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20220408 Address after: 528000 units 501-1 and 503, 5th floor, building 7, zone a, Hantian science and Technology City, No. 17, Shenhai Road, Guicheng Street, Nanhai District, Foshan City, Guangdong Province (residence declaration) Applicant after: FOSHAN MIC MEDICAL TECHNOLOGY Co.,Ltd. Address before: 311400 no.82-18 shuizhukeng, Nanshan village, Lushan street, Fuyang District, Hangzhou City, Zhejiang Province Applicant before: Zhejiang Qince Kongfen Equipment Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |