CN218249194U - Ceramic filter used in high-temperature environment - Google Patents

Ceramic filter used in high-temperature environment Download PDF

Info

Publication number
CN218249194U
CN218249194U CN202221960642.2U CN202221960642U CN218249194U CN 218249194 U CN218249194 U CN 218249194U CN 202221960642 U CN202221960642 U CN 202221960642U CN 218249194 U CN218249194 U CN 218249194U
Authority
CN
China
Prior art keywords
filter
disc
nonrust
ceramic
slider
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
Application number
CN202221960642.2U
Other languages
Chinese (zh)
Inventor
丁卫东
秦亮
黄增银
范清臣
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhongjing Xinke Energy Equipment Shanghai Co ltd
Original Assignee
Zhongjing Xinke Energy Equipment Shanghai Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zhongjing Xinke Energy Equipment Shanghai Co ltd filed Critical Zhongjing Xinke Energy Equipment Shanghai Co ltd
Priority to CN202221960642.2U priority Critical patent/CN218249194U/en
Application granted granted Critical
Publication of CN218249194U publication Critical patent/CN218249194U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

The utility model discloses a ceramic filter for among high temperature environment, including filtering storehouse and cang gai, cang gai erection joint is on filtering the top position in storehouse, the utility model discloses in, through clearance subassembly, the trachea connector with drive actuating cylinder cooperation and use, be convenient for clear up the ceramic membrane filter tube, during the use, it begins work to drive actuating cylinder, the output pole that drives actuating cylinder descends, drive nonrust disc decline, and when descending, slide slowly gliding in the spout of filtering the inboard both ends in storehouse through first slider, go out a chimney and ceramic membrane filter tube pore contact until nonrust disc bottom a week, be connected with the trachea connector because of the air current connecting pipe, and the trachea connector is connected with outside air pump, during the use, the air pump sends the air current into nonrust disc through the air current connecting pipe in the pottery membrane, the air current in the nonrust disc blows through the chimney of bottom a week to the filter tube pore, blow off the dust of adhesion at the ceramic membrane filter tube pore, make its unobstructed effect of avoiding blockking.

Description

Ceramic filter used in high-temperature environment
Technical Field
The utility model relates to a ceramic filter technical field, concretely relates to ceramic filter for among high temperature environment.
Background
A ceramic filter, which is a relatively widely used filter and includes a rigid ceramic membrane filter tube as a filter element, is composed of a porous body having two end faces and an outer peripheral face and having a plurality of main flow paths for a fluid to be purified formed by partition walls so as to pass from one end face to the other end face, and a filter membrane disposed on an inner wall surface of the main flow path.
At present, the ceramic filter who is arranged in high temperature environment because ceramic membrane filter tube filters as filter element in the use, but after using a period, its filter tube inner tube easily glues the dust, causes the jam, needs clear up just can normally work, and during the clearance, needs shut down and dismantles various connecting pieces, leads to the very inconvenient problem of clearance because ceramic filter.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a ceramic filter for among high temperature environment to propose the current ceramic filter for among the high temperature environment among the above-mentioned background art of solution, in the use, the filter tube inner tube is because long-time use, and easy the jam needs to shut down and dismantles various connecting pieces and just can clear up, and the very inconvenient problem of clearance step.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a ceramic filter for among high temperature environment, is including filtering storehouse and cang gai, cang gai erection joint is on filtering the top position in storehouse, the upper end left side of cang gai is provided with the trachea connector, be provided with in the middle of the upper end of cang gai and filter the import, the upper end right side of cang gai is provided with drives actuating cylinder, the output end that drives actuating cylinder is located and is provided with the clearance subassembly on filtering the storehouse, the lower extreme of clearance subassembly is located and is provided with fixed subassembly on filtering the storehouse, the inboard a week of fixed subassembly is provided with the ceramic membrane filter tube, the inboard bottom of filtering the storehouse is provided with the drain, the bottom a week of filtering the storehouse is provided with the supporting leg.
The cleaning assembly comprises an airflow connecting pipe, a stainless disc, a fixing bolt, a round rod connecting sleeve, a first slider and an air outlet cylinder, wherein the first slider is arranged at two ends of the outer side of the stainless disc, the airflow connecting pipe is arranged on the left side of the upper end of the stainless disc, the round rod connecting sleeve is arranged on the right side of the upper end of the stainless disc, the fixing bolt is arranged at the front end of the round rod connecting sleeve, the air outlet cylinder is arranged on the periphery of the bottom end of the stainless disc, and the stainless disc is connected onto an output rod of a driving cylinder through the round rod connecting sleeve.
The fixed assembly comprises a round hole, a first disc frame, a second slider and a second disc frame, the second slider is arranged on the outer sides of two ends of the first disc frame, the second disc frame is arranged at the bottom end of the inner side of the second slider, the round hole is formed in the periphery of the upper end of the round hole and the periphery of the upper end of the second disc frame, and the first disc frame is connected to the filter bin through the second slider.
Wherein, it includes the bottom through-hole to filter the storehouse, filters a jar body and spout, it is provided with the bottom through-hole to filter jar body bottom inboard centre, it is provided with the spout to filter jar body inboard both ends, it connects on the supporting leg to filter the jar body.
The cleaning assembly and the driving cylinder are sleeved in advance and are fixedly connected in a rotating mode through bolts.
The fixed assembly and the filter bin are connected and mounted in a clamping mode, and the fixed assembly is mounted and connected to the inner side of the filter bin.
Wherein, the supporting leg is connected the installation through the welded mode with filtering the storehouse, just the supporting leg is connected on filtering the bottom position in storehouse.
To sum up, owing to adopted above-mentioned technique, the beneficial effects of the utility model are that:
1. the utility model discloses in, through the clearance subassembly, the trachea connector with drive actuating cylinder cooperation and use, be convenient for clear up the ceramic membrane filter tube, during the installation clearance subassembly, firstly, connect the ways on the output pole that drives actuating cylinder through the round bar, further use the rotatory fastening of fixing bolt, make it use to be difficult for droing, later be connected the left air current connecting pipe in nonrust disc upper end with the trachea connector, when using, it begins work to drive actuating cylinder, the output pole that drives actuating cylinder descends, drive nonrust disc decline, and when descending, slide slowly gliding in the spout at the inboard both ends in filter bin through first slider, go out the gas cylinder and filter tube hole contact up to nonrust disc bottom a week, later because of air current connecting pipe is connected with the trachea connector, and the trachea connector is connected with outside air pump, when making it use, the air pump sends into nonrust disc through the air current connecting pipe, later the air current in the nonrust disc blows the ceramic membrane filter tube hole through the gas cylinder hole of bottom a week, blow off the adhesion at the ceramic membrane filter tube hole, make it to make it, avoid the effect of jam, use like this, not only need not dismantle each connecting piece, and when the clearance dust is convenient to utilize, it is very practical.
2. The utility model discloses in, use through fixed subassembly and filtration storehouse cooperation, can consolidate the ceramic membrane filter tube, be difficult for when making it use receiving the effect that pressure rocked and run into bad, during the fixed subassembly of installation, at first, the second slider joint through first disc frame and second disc frame outside both ends is in the spout at the inboard both ends of filtration storehouse, rock about being difficult when making it use, when using, peg graft many ceramic membrane filter tubes in the round hole of first disc frame and second disc frame upper end a week, be difficult for rocking when making it use, accomplish the reinforcement to the ceramic membrane filter tube, can avoid the ceramic membrane filter tube to receive the pressure that produces and bump damage when equipment operation when making it use, the life of ceramic membrane filter has been prolonged.
Drawings
FIG. 1 is a schematic sectional perspective view of a ceramic filter used in a high temperature environment according to the present invention;
FIG. 2 is a schematic view of a cleaning assembly of the ceramic filter for use in high temperature environments of the present invention;
FIG. 3 is a schematic view of a fixing assembly of a ceramic filter used in a high temperature environment according to the present invention;
fig. 4 is a schematic view of a filter bin of the ceramic filter used in a high temperature environment according to the present invention.
In the figure: 1. supporting legs; 2. a ceramic membrane filter tube; 3. a fixing component; 31. a circular hole; 32. a first disc frame; 33. a second slider; 34. a second disc holder; 4. cleaning the assembly; 41. an airflow connecting pipe; 42. a stainless disc; 43. fixing the bolt; 44. a round rod connecting sleeve; 45. a first slider; 46. an air outlet cylinder; 5. a driving cylinder; 6. a filtration inlet; 7. a gas pipe connector; 8. a filtering bin; 81. a bottom through hole; 82. filtering the tank body; 83. a chute; 9. a sewage draining outlet; 10. a bin cover.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example one
Referring to fig. 1 and 2, a ceramic filter for high temperature environment, comprising a filtering chamber 8 and a chamber cover 10, wherein the chamber cover 10 is installed on the top of the filtering chamber 8, the left side of the upper end of the chamber cover 10 is provided with a gas pipe connector 7, the middle of the upper end of the chamber cover 10 is provided with a filtering inlet 6, the right side of the upper end of the chamber cover 10 is provided with a driving cylinder 5, the output end of the driving cylinder 5 is positioned on the filtering chamber 8 and is provided with a cleaning component 4, the lower end of the cleaning component 4 is positioned on the filtering chamber 8 and is provided with a fixing component 3, the circumference of the inner side of the fixing component 3 is provided with a ceramic membrane filtering pipe 2, the bottom end of the inner side of the filtering chamber 8 is provided with a sewage outlet 9, the circumference of the bottom end of the filtering chamber 8 is provided with supporting legs 1, when the ceramic filter is used, firstly, the filtering inlet 6 in the middle of the upper end of the chamber cover 10 is connected with a pipeline which needs filtering from the outside, and the gas pipe connector 7 is connected with an external air pump, then, a sewage discharge port 9 in the middle of the bottom end of the filtering bin 8 is connected with an external sewage discharge pipeline, in the using process, materials to be filtered enter the filtering bin 8 from a filtering inlet 6 and are filtered through a ceramic membrane filtering pipe 2 on the periphery of the inner side of the fixing component 3, in the using process, the ceramic membrane filtering pipe 2 is reinforced through the fixing component 3, the ceramic membrane filtering pipe 2 is prevented from being collided and damaged due to pressure generated when the ceramic membrane filtering pipe 2 is operated by equipment, the service life of the ceramic membrane filter is prolonged, after the ceramic membrane filtering pipe 2 is used for a period of time, the ceramic membrane filtering pipe 2 needs to be cleaned, the inner pipe of the ceramic membrane filtering pipe 2 is prevented from being blocked due to excessive dust adhesion, so that the filtering efficiency is influenced, in the cleaning process, the driving cylinder 5 starts to work, the output rod of the driving cylinder 5 descends, and the stainless disc 42 of the cleaning component 4 is driven to descend, and when descending, slide in the spout 83 at the inboard both ends of filter bin 8 through first slider 45 and slowly glide, go up to the play chimney 46 of stainless disc 42 bottom a week and ceramic membrane filter tube 2 pore contact, later be connected with outside air pump because of air connecting pipe 41, when making its use, the air pump sends the air current into stainless disc 42 through air connecting pipe 41, later the air current in stainless disc 42 blows to ceramic membrane filter tube 2 pore through the play chimney 46 of bottom a week, blow away the dust that glues at ceramic membrane filter tube 2 pore, make it unobstructed, avoid the effect of jam, use like this, not only need not dismantle each connecting piece, utilize gas to blow the dust during clearance, and is very convenient and practical.
In the utility model, the cleaning component 4 and the driving cylinder 5 are connected by first sleeve joint and are rotationally and fixedly connected by using bolts, the cleaning component 4 comprises an airflow connecting pipe 41, a stainless disc 42, a fixing bolt 43, a round bar connecting sleeve 44, a first slider 45 and an air outlet cylinder 46, the first slider 45 is arranged at the two ends of the outer side of the stainless disc 42, the airflow connecting pipe 41 is arranged at the left side of the upper end of the stainless disc 42, the round bar connecting sleeve 44 is arranged at the right side of the upper end of the stainless disc 42, the fixing bolt 43 is arranged at the front end of the round bar connecting sleeve 44, the air outlet cylinder 46 is arranged at the bottom of the stainless disc 42 in a circle, the stainless disc 42 is connected to the output rod of the driving cylinder 5 by the round bar connecting sleeve 44, when the cleaning component 4 is installed, firstly, the round bar connecting sleeve 44 is connected to the output rod of the driving cylinder 5, the fixing bolt 43 is further used for rotationally fastening, so that the cleaning component is not easy to fall off, then, the air flow connecting pipe 41 on the left side of the upper end of the stainless disc 42 is connected with the air pipe connector 7, when the air filter is used, the driving air cylinder 5 starts to work, the output rod of the driving air cylinder 5 descends to drive the stainless disc 42 to descend, and when the stainless disc descends, the air flow connecting pipe 41 slides in the sliding grooves 83 at the two ends of the inner side of the filter bin 8 to slowly slide downwards until the air outlet cylinder 46 at the bottom of the stainless disc 42 in a circle is in contact with the pore of the ceramic membrane filter tube 2, then the air pipe connector 7 is connected with the air pipe connector 7 because the air flow connecting pipe 41 is connected with an external air pump, when the air filter is used, the air pump sends air flow into the stainless disc 42 through the air flow connecting pipe 41, then the air flow in the stainless disc 42 blows air to the pore of the ceramic membrane filter tube 2 through the air outlet cylinder 46 at the bottom in a circle, and blows off dust adhered to the pore of the ceramic membrane filter tube 2, so that the dust is smooth and the pore is prevented from being blocked, not only does not need to dismantle each connecting piece, but also utilizes gas to blow dust during cleaning, thereby being very convenient and practical.
The working principle is as follows: when the device is used, firstly, the filtering inlet 6 in the middle of the upper end of the bin cover 10 is connected with an external pipeline to be filtered, the air pipe connector 7 is connected with an external air pump, then the sewage discharge outlet 9 in the middle of the bottom end of the filtering bin 8 is connected with an external sewage discharge pipeline, in the using process, materials to be filtered enter the filtering bin 8 from the filtering inlet 6 and are filtered through the ceramic membrane filtering pipes 2 on the periphery of the inner side of the fixing component 3, in the using process, the ceramic membrane filtering pipes 2 are reinforced through the fixing component 3, the ceramic membrane filtering pipes 2 are prevented from being collided and damaged due to pressure generated when the ceramic membrane filtering pipes 2 are operated by equipment, the service life of the ceramic membrane filter is prolonged, after the ceramic membrane filtering pipes 2 are used for a period of time, the ceramic membrane filtering pipes 2 are prevented from being blocked due to excessive adhesion of dust, and the filtering efficiency is influenced, when the ceramic membrane filter is used, the air pump sends air flow into the stainless disc 42 through the air flow connecting pipe 41, then the air flow in the stainless disc 42 blows air to the pores of the ceramic membrane filter pipe 2 through the air outlet cylinder 46 at the periphery of the bottom end, and blows off dust adhered to the pores of the ceramic membrane filter pipe 2, so that the ceramic membrane filter pipe is prevented from being blocked.
Example two
Referring to fig. 1 and 3, a ceramic filter for high temperature environment, this embodiment compares in embodiment one, fixed subassembly 3 and filtration storehouse 8 are connected the installation through the mode of joint, and fixed subassembly 3 erection joint is on the inboard position of filtration storehouse 8, fixed subassembly 3 includes round hole 31, first disk rack 32, second slider 33 and second disk rack 34, first disk rack 32 both ends outside is provided with second slider 33, the inboard bottom of second slider 33 is provided with second disk rack 34, round hole 31 and second disk rack 34 upper end a week all are provided with round hole 31, first disk rack 32 passes through second slider 33 and connects on filtration storehouse 8.
The working principle is as follows: when subassembly 3 is fixed in the installation, at first, second slider 33 joint through first disk rack 32 and second disk rack 34 outside both ends is in the spout 83 at 8 inboard both ends in filtration storehouse, it rocks about being difficult for when making it use, when using, peg graft many ceramic membrane filter tubes 2 in the round hole 31 of first disk rack 32 and second disk rack 34 upper end a week, be difficult for rocking when making its use, accomplish the reinforcement to ceramic membrane filter tube 2, can avoid ceramic membrane filter tube 2 to receive the pressure that produces and the collision damage when equipment moves when making its use, the life of ceramic membrane filter has been prolonged.
EXAMPLE III
Referring to fig. 1 and 4, a ceramic filter for high temperature environment, this embodiment compares in embodiment two, and supporting leg 1 and filter bin 8 are connected the installation through the welded mode, and supporting leg 1 connects on the bottom position of filter bin 8, and filter bin 8 includes bottom through-hole 81, filters jar body 82 and spout 83, filters jar body 82 and is provided with bottom through-hole 81 in the middle of the bottom inboard, filters jar inboard both ends of body 82 and is provided with spout 83, filters jar body 82 and connects on supporting leg 1.
The working principle is as follows: when 8, at first, will filter jar body 82's bottom and the welding of supporting leg 1, it is more firm difficult for droing when making it use, and can be to filtering jar body 82 fixed stay through supporting leg 1, and be convenient for install fixed subassembly 3 through the spout 83 of the inboard both ends of the filtering jar body 82, slide from top to bottom when conveniently clearing up subassembly 4 clearance, be convenient for connect blowdown mouth 9 through the bottom through-hole 81 of the inboard bottom of the filtering jar body 82, so that during the use, through the blowdown of drain mouth 9.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Claims (7)

1. A ceramic filter for use in high temperature environments, comprising a filter bin (8) and a bin cover (10), characterized in that: the utility model discloses a ceramic membrane filter cartridge, including storehouse lid (10), drive actuating cylinder (5), the output end that drives actuating cylinder (5) is located and is provided with clearance subassembly (4) on filter cartridge (8), the lower extreme of clearance subassembly (4) is located and is provided with fixed subassembly (3) on filter cartridge (8), the inboard a week of fixed subassembly (3) is provided with ceramic membrane filter tube (2), the inboard bottom of filter cartridge (8) is provided with drain (9), the bottom a week of filter cartridge (8) is provided with supporting leg (1).
2. A ceramic filter for use in a high temperature environment, according to claim 1, wherein: clearance subassembly (4) include air connecting pipe (41), nonrust disc (42), fixing bolt (43), round bar adapter sleeve (44), first slider (45) and play gas cylinder (46), nonrust disc (42) outside both ends are provided with first slider (45), nonrust disc (42) upper end left side is provided with air connecting pipe (41), nonrust disc (42) upper end right side is provided with round bar adapter sleeve (44), round bar adapter sleeve (44) front end is provided with fixing bolt (43), nonrust disc (42) bottom a week is provided with play gas cylinder (46), nonrust disc (42) are connected on the output pole of driving actuating cylinder (5) through round bar adapter sleeve (44).
3. A ceramic filter for use in a high temperature environment, according to claim 1, wherein: fixed subassembly (3) include round hole (31), first disc frame (32), second slider (33) and second disc frame (34), first disc frame (32) both ends outside is provided with second slider (33), second slider (33) inboard bottom is provided with second disc frame (34), round hole (31) and second disc frame (34) upper end a week all are provided with round hole (31), first disc frame (32) are connected on filtering storehouse (8) through second slider (33).
4. A ceramic filter for use in a high temperature environment, according to claim 1, wherein: filter storehouse (8) and include bottom through-hole (81), filter the jar body (82) and spout (83), it is provided with bottom through-hole (81) to filter jar body (82) bottom inboard centre, it is provided with spout (83) to filter jar body (82) inboard both ends, it connects on supporting leg (1) to filter jar body (82).
5. A ceramic filter for use in a high temperature environment, according to claim 1, wherein: the cleaning assembly (4) and the driving cylinder (5) are connected in a sleeved mode firstly and are fixedly connected in a rotating mode through bolts.
6. A ceramic filter for use in a high temperature environment, according to claim 1, wherein: fixed subassembly (3) and filtration storehouse (8) are connected the installation through the mode of joint, just fixed subassembly (3) erection joint is on the inboard position of filtering storehouse (8).
7. A ceramic filter for use in a high temperature environment, according to claim 1, wherein: the supporting legs (1) and the filter bins (8) are connected and installed in a welding mode, and the supporting legs (1) are connected to the bottom end of the filter bins (8).
CN202221960642.2U 2022-07-28 2022-07-28 Ceramic filter used in high-temperature environment Active CN218249194U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202221960642.2U CN218249194U (en) 2022-07-28 2022-07-28 Ceramic filter used in high-temperature environment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202221960642.2U CN218249194U (en) 2022-07-28 2022-07-28 Ceramic filter used in high-temperature environment

Publications (1)

Publication Number Publication Date
CN218249194U true CN218249194U (en) 2023-01-10

Family

ID=84763910

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202221960642.2U Active CN218249194U (en) 2022-07-28 2022-07-28 Ceramic filter used in high-temperature environment

Country Status (1)

Country Link
CN (1) CN218249194U (en)

Similar Documents

Publication Publication Date Title
CN213159808U (en) Blowback ash removal device of air box pulse bag type dust collector
CN113318495B (en) High-efficient environmental protection's industrial sewage treatment equipment
CN208591722U (en) A kind of high-efficiency sewage catalytic unit
CN101314489B (en) Rotary column separator
CN218249194U (en) Ceramic filter used in high-temperature environment
CN108096897A (en) The more filtering element self-cleaning filters of suctorial type
CN115318029A (en) Miniature dust remover
US20200384400A1 (en) Top inlet vacuum pulse cleaning dust collector
CN101920149A (en) Plasma smoke purifying equipment
CN109482028A (en) A kind of efficient industrial fumes energy-saving and purifying processing equipment
CN210845444U (en) Partition plate type filter
CN208049486U (en) The more filtering element self-cleaning filters of suctorial type
CN112774329A (en) Factory exhaust gas purifier
CN108939763B (en) Water film dust collector
CN111085018A (en) Filter for detecting water quality by using filter membrane method
CN218871616U (en) Purifier of numerical control cutting machine
CN2645749Y (en) Highly effective automatic air filter for removing ash
CN221579858U (en) Module silk screen filter
CN221358697U (en) Self-cleaning seawater filter cartridge
CN218924149U (en) Semi-product gas separator
CN210171023U (en) Filter cartridge and dust removal integrated machine
CN220309969U (en) Smoke environment-friendly filtering bag
CN207786063U (en) A kind of automatically cleaning bag hose
CN212017406U (en) High-temperature-resistant solid-liquid separation device
CN217594211U (en) Dust recovery system for sand blasting process

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant