CN206196384U - United reaper and its compound cleaning and sorting system - Google Patents
United reaper and its compound cleaning and sorting system Download PDFInfo
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- CN206196384U CN206196384U CN201621203769.4U CN201621203769U CN206196384U CN 206196384 U CN206196384 U CN 206196384U CN 201621203769 U CN201621203769 U CN 201621203769U CN 206196384 U CN206196384 U CN 206196384U
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Abstract
The utility model provides a kind of united reaper and its compound cleaning and sorting system, compound cleaning and sorting system is provided with material inlet including one end, the other end is provided with the separation barrel of straw outlet, the first pusher for material to be pushed to straw outlet end from the material inlet end of separation barrel is provided with separation barrel, the sorting hole for only being spilt for the seed in material and tiny debris is offered on separation barrel, it is provided with below separation barrel and clean case for receive seed and tiny debris, clean and inner core is provided with case, the passage fallen for seed and tiny debris is formed between the side of inner core and the tank wall for cleaning case, the lower end of inner core is provided with the debris import connected with the inlet scoop of induced-draught fan so that seed and tiny debris can be discharged through debris import and induced-draught fan by tiny debris after passage and clean case.Sorting hole can be realized once cleaning, and disconnected stalk can be discharged from straw outlet, and debris import siphons away tiny debris, realize it is secondary clean, the cleaning and sorting system simple structure, to clean effect good.
Description
Technical field
The utility model is related to a kind of united reaper and its compound cleaning and sorting system.
Background technology
Cleaning and sorting system is the important component of grain combine, and the quality of its performance directly influences the work of whole machine
Industry effect.At present, what the widely used blower fan of most of grain combines was engaged with vibratory sieve cleans mode, and its structure is answered
It is miscellaneous, bulky, therefore for hilly and mountainous land Mini-grain combine, due to being limited by power and locus, no
Preferably configure " blower fan-vibratory sieve " type cleaning and sorting system.At present, for the less small cereal combine harvester of feed quantity, adopt extensively
With without sieving simple aidr bells blast system or Cyclone separating cleaning system, though wherein without simple aidr bells blast system simple structure is sieved, clean matter
Amount is low.
Authorization Notice No. is CN203457560U, and authorized announcement date is disclosed for the Chinese utility model patent of 2014.03.05
A kind of cleaning and sorting system, including impurity adsorbing blower and cyclone separating tube, when using, into the material in cyclone separating tube in inertia
Under the collective effect of power, gravity and air-flow, the larger seed of proportion is into spiral motion track and final from rotation along the inwall of cylinder
The grain outlet discharge of wind cylinder lower end, the less clever chaff of proportion and disconnected stalk to cyclone separating tube intermediary movements, and through whirlwind
The gettering pipeline connected at the gettering mouthful of cylinder upper end is extracted out by impurity adsorbing blower, is finally discharged from the straw outlet of impurity adsorbing blower,
Realize that seed is separated with debris.
The cyclone separating tube in actual applications, for break stalk disposal ability be short of, firstly for than
The great disconnected stalk in specific gravity is no separating power, and the disconnected stalk of this part can be arranged from grain outlet together with seed
Go out, the effect that influence is cleaned；Next disconnected stalk suitable with specific gravity for some proportions, due to its floating velocity and seed
Almost, therefore can neither be extracted out by impurity adsorbing blower, can not be discharged from grain outlet with seed again, can only hoarded in cylinder
In, when the amount hoarded is more, it will influence cyclone separating tube cleans cyclone separating tube in effect, and united reaper
Lower section is all provided with tanker, is collected with to the seed isolated, and when cyclone separating tube power-off is stopped, stores up
Long-pending disconnected stalk will be dropped down onto down in tanker under gravity, and the seed to cleaning again results in pollution, so as to influence clear
The quality of choosing.
Utility model content
The purpose of this utility model is to provide a kind of simple structure, clean effect preferably compound cleaning and sorting system；This reality
Also resided in new purpose and a kind of united reaper using the compound cleaning and sorting system is provided.
In order to solve the above-mentioned technical problem, the technical scheme of compound cleaning and sorting system is in the utility model：
Compound cleaning and sorting system, including one end is provided with the separation barrel that material inlet, the other end are provided with straw outlet, separates
The first pusher for material to be pushed to straw outlet end from the material inlet end of separation barrel, separation barrel are provided with roller
On offer the sorting hole for only being spilt for the seed in material and tiny debris, be provided with for receiving below separation barrel
That states seed and tiny debris cleans case, cleans and inner core is provided with case, between the side of the inner core and the tank wall for cleaning case
The passage fallen for seed and tiny debris is formed, the lower end of the inner core is provided with the debris connected with the inlet scoop of induced-draught fan
Import is so that seed and tiny debris can be discharged through debris import and induced-draught fan by tiny debris after the passage and clean case.
Clean and the end of the passage is provided with the depressed part that is inwardly recessed on the tank wall of case, the depressed part has will
The spigot surface below seed and the guiding debris import of tiny debris for falling so far.
The lower end for cleaning the depressed part of case is provided with abducent air inlet.
The inner core is located at the middle part cleaned in case, and the passage has two and is symmetrically positioned in the both sides of inner core, inner core
Top is provided with and is slid to the inclined-plane of the passage for material.
It is square below the inclined-plane of the inner core, is formed between two symmetric sides of square inner core and the tank wall for cleaning case
The passage, is respectively arranged with ventilation duct on two other symmetric side of square inner core, one end of the ventilation duct with side
The inside connection of shape inner core, the other end after two ventilation ducts cross is connected with the inlet scoop of the induced-draught fan.
The outside of separation barrel is arranged with shell, and the bottom of shell offers and cleans the blanking port that case connects, and cleans case
Axial length of the axial length less than shell, be provided with the outer peripheral face of separation barrel for by the seed in shell and tiny
What debris pushed blanking port to pushes blade.
The technical scheme of united reaper is in the utility model：
United reaper, including frame, are provided with compound cleaning and sorting system in frame, be combined cleaning and sorting system and set including one end
There are material inlet, the other end to be provided with the separation barrel of straw outlet, be provided with separation barrel for by material from separation barrel
Material inlet end push first pusher at straw outlet end to, offered on separation barrel only for the seed in material and tiny miscellaneous
The sorting hole that thing spills, to be provided with below separation barrel and clean case for receive the seed and tiny debris, cleans case
Inner core is inside provided with, the passage fallen for seed and tiny debris is formed between the side of the inner core and the tank wall for cleaning case,
The lower end of the inner core is provided with the debris import connected with the inlet scoop of induced-draught fan so that seed and tiny debris are by described
Tiny debris can clean case through debris import and induced-draught fan discharge after passage.
Clean and the end of the passage is provided with the depressed part that is inwardly recessed on the tank wall of case, the depressed part has will
The spigot surface below seed and the guiding debris import of tiny debris for falling so far.
The lower end for cleaning the depressed part of case is provided with abducent air inlet.
The inner core is located at the middle part cleaned in case, and the passage has two and is symmetrically positioned in the both sides of inner core, inner core
Top is provided with and is slid to the inclined-plane of the passage for material.
It is square below the inclined-plane of the inner core, is formed between two symmetric sides of square inner core and the tank wall for cleaning case
The passage, is respectively arranged with ventilation duct on two other symmetric side of square inner core, one end of the ventilation duct with side
The inside connection of shape inner core, the other end after two ventilation ducts cross is connected with the inlet scoop of the induced-draught fan.
The outside of separation barrel is arranged with shell, and the bottom of shell offers and cleans the blanking port that case connects, and cleans case
Axial length of the axial length less than shell, be provided with the outer peripheral face of separation barrel for by the seed in shell and tiny
What debris pushed blanking port to pushes blade.
The beneficial effects of the utility model are：Due to being offered on separation barrel only for the seed in material and tiny miscellaneous
During the sorting hole that thing spills, so smaller seed and tiny debris can just spill from sorting hole and fall into and clean case,
And can then be discharged from the straw outlet of separation barrel in the presence of the first pusher than larger disconnected stalk, it is achieved thereby that seed
With efficiently separating for disconnected stalk, it is ensured that clean effect, that is, complete and once clean.And clean and be provided with case inner core, inner core
The passage fallen for seed and tiny debris is formed between the tank wall for cleaning case, seed and tiny debris are so limited
By flow, when little by flow, in seed and tiny debris by the way that after the passage, the debris import of inner core lower end can
To be easy to siphon away tiny debris, and case is cleaned through induced-draught fan discharge, it is achieved thereby that secondary clean, further ensured clear
Select effect, the compound cleaning and sorting system compared to existing technology in " blower fan-vibratory sieve " type cleaning and sorting system for, structure is significantly simple
Change, compared to Cyclone separating cleaning system for, clean effect more preferably, for break stalk disposal ability it is stronger.
Brief description of the drawings
Fig. 1 is the structural representation of the compound cleaning and sorting system in one embodiment of united reaper in the utility model；
Fig. 2 be Fig. 1 in A-A to sectional view；
Fig. 3 is the sectional view of B-B direction in Fig. 1；
Fig. 4 is the top view of part-structure in Fig. 1.
In figure：1. the 3rd pusher；2. material conveying pipe；3. the second pusher；4. shaft coupling；5. back-up roller wheel；6.
First pusher；7. shell；8. separation barrel；9. blade is pushed；10. straw outlet；11. speed change systems；12. belt pulleys；13. inhale
Blower fan；14. air outlets；15. connecting tubes；16. ventilation ducts；17. clean case；18. inner cores；19. impellers；20. air inlets；21. is recessed
The portion of falling into；22. spigot surfaces；23. debris imports；24. passages；25. inclined-planes；26. blanking ports.
Specific embodiment
One embodiment of united reaper is as shown in Fig. 1 ~ Fig. 4, including frame（Not shown in figure）, it is provided with frame
Sheller unit（Not shown in figure）With compound cleaning and sorting system, be combined cleaning and sorting system include the 3rd pusher 1, the second pusher 3 with
And separation barrel 8, wait and clean material in the 3rd pusher 1 through the seed after sheller unit threshing, clever chaff, disconnected stalk mixture
In the presence of be delivered to the bottom of the second pusher 3.Second pusher 3 is provided with material delivery pipe to be obliquely installed outside it
Road 2, under the turning effort of the second pusher 3, material to be cleaned is promoted to the material inlet of separation barrel 8.Separation barrel 8
Be horizontally disposed, its other end is provided with straw outlet 10, be provided with the first pusher 6 in separation barrel 8, the first pusher 6 with
The rotary shaft of the second pusher 3 is connected by shaft coupling 4, and under the turning effort of the first pusher 6, material to be cleaned can be from
The material inlet end of separation barrel 8 is delivered to straw outlet end.
The sorting hole for only being spilt for the seed in material and tiny debris, the separation are offered on the barrel of separation barrel 8
There is whole barrel that is numerous and being covered with separation barrel 8 in hole.The outside of separation barrel 8 is arranged with shell 7, but straw outlet 10
Expose, to ensure exhausting impurity function.Shell 7 also for horizontally disposed and cylindrical with separation barrel 8, seed and tiny miscellaneous
After thing spills from sorting hole, can fall into shell 7.The lower section of shell 7 is provided with for receiving the seed and tiny debris
Clean case 17, clean the axial length of the axial length of case 17 less than shell 7, the bottom of shell 7 offers and cleans case 17
The blanking port 26 for connecting, cleans bottom left of the case 17 positioned at shell 7, that is to say, that spill from the left end portion of separation barrel 8
Seed and tiny debris can fall directly into cleaning case 17, and the seed that is spilt from the right end portion of separation barrel 8 and thin
Small debris are fallen first in shell 7.
It is provided with the outer peripheral face of separation barrel 8 for pushing the seed in shell 7 and tiny debris to blanking port 26
Blade 9 is pushed, therefore the pusher 6 of separation barrel 8 and first is counter-rotating, the two ends of separation barrel 8 are provided with back-up roller
Wheel 5, when 8 and first pusher of separation barrel 6 distinguishes rotary motion, the seed isolated and a tiny debris part directly fall
Enter to clean in case 17, another part is pushed into from right-to-left in the presence of blade 9 is pushed after falling in shell 7 and cleans case 17
In, and be then that movement from left to right is finally discharged straw outlet 10 in the presence of the first pusher 6 than larger disconnected stalk, from
And well separate disconnected stalk, realize and once clean, it is ensured that clean effect.Compound cleaning and sorting system also includes setting
In the speed change system 11 for driving the rotation of 8 and first pusher of separation barrel 6 on the right side of separation barrel 8, speed change system 11
Right side is provided with and motor（Not shown in figure）The belt pulley 12 of drive connection.
Clean and be provided with case 17 inner core 18, inner core 18 is located at the middle part for cleaning case 17, the top of inner core 18 have it is top,
There are two symmetrical inclined-planes 25 downwards along top, fall into the seed and tiny debris cleaned in case 17 along the landing downwards of inclined-plane 25.
The inclined-plane of inner core 18 is square below 25, forms two between two of which symmetric side and the tank wall for cleaning case 17 respectively and supplies seed
The passage 24 that grain and tiny debris fall, the bottom of inner core 18 is provided with the debris import connected with the inlet scoop of induced-draught fan 13
23.Clean and the end of passage 24 is provided with the depressed part 21 that is inwardly recessed on the tank wall of case 17, depressed part 21 has will fall
So far seed and tiny debris is oriented to the spigot surface 22 of the lower section of debris import 23, so when seed and tiny debris rely on gravity
From 24 times backwardnesss of passage, in the presence of spigot surface 22, seed and tiny debris can be thrown to immediately below the bottom of inner core 18, this
When heavier seed may proceed to, and lighter tiny debris can then be inhaled into debris import in the presence of induced-draught fan 13
23, finally discharged from induced-draught fan 13, it is achieved thereby that secondary clean, further ensure and clean effect.
The lower end for cleaning the depressed part 21 of case 17 is provided with abducent air inlet 20, and the lower section for cleaning case 17 also sets up
There is tanker（Not shown in figure）, the seed for falling is fallen into tanker through air inlet 20, so as to be collected.The air inlet 20 is in dovetail
Shape, air inflow can be adjusted by the abducent degree of air inlet 20, suitable by setting according to the specification of induced-draught fan 13
Air inlet 20 can be such that air inflow is adjusted to most preferably, so that air-flow is evenly, it is to avoid also suck seed when air-flow is excessive miscellaneous
Tiny debris cannot be suctioned out when thing import and too small air-flow.
Ventilation duct 16 is respectively arranged with two other symmetric side of inner core 18, one end of the ventilation duct 16 is and inner core
18 inside connection, the other end after two ventilation ducts 16 cross is connected with the inlet scoop of induced-draught fan 13.For convenience with air draught
The inlet scoop of machine 13 is attached, and a connecting tube for taper 15 is provided with the inlet scoop of induced-draught fan 13, connecting tube 15
Large port is adapted to the inlet scoop of induced-draught fan 13, portlet is adapted to ventilation duct 16.Under the turning effort of impeller 19, it is inhaled into
The tiny debris of debris import 23 can be inhaled into induced-draught fan 13 and from air outlet 14 from any one ventilation duct 16 at two ends
Case 17 is cleaned in discharge.
Being combined the operation principle of cleaning and sorting system is：In the presence of the 3rd pusher 1, through the seed after sheller unit threshing
Grain, clever chaff, disconnected stalk mixture are waited and clean the bottom that material is transported to the second pusher 3, with the rotation of the second pusher 3
Turn, material to be cleaned is promoted to the material inlet of separation barrel 8, make in the counter-rotating of the pusher 6 of separation barrel 8 and first
Under, the sorting hole of a part of seed and tiny debris from separation barrel 8 falls directly into cleaning case 17 after spilling, another portion
Point seed and tiny debris fall in shell 7 after spilling, and are pushed into from right-to-left in the presence of blade 9 is pushed and clean case 17
In, and the larger disconnected stalk of the ratio that can not be spilt from sorting hole is then to move finally to be discharged from straw outlet 10 from left to right.And fall
Enter to clean the seed in case 17 and tiny debris then to be slid along inclined-plane 25 and moved down from the passage 24 of both sides, work as seed
After being collided on spigot surface 22 with tiny debris, can be thrown to immediately below the bottom of inner core 18, at this moment heavier seed may proceed to
Fall, and lighter tiny debris can then be inhaled into the debris import 23 of the bottom of inner core 18 in the presence of induced-draught fan 13, finally
Discharged from ventilation duct 16 and induced-draught fan 13.
Why setting inner core 18 in case 17 is being cleaned, exactly in order to form the passage fallen for seed and tiny debris,
The passage is narrow, but also to have enough width to ensure that seed and tiny debris smoothly fall and will not block up
Plug, while guarantee can not be wide unlikely too many with the material for causing to fall and break again, so that ensure that tiny debris can be siphoned away smoothly,
Quality is cleaned in raising.
Clean the axial length of the axial length of case 17 less than shell 7, thus a part of seed for being spilt from sorting hole and
Tiny debris fall into shell 7 before this, then in being just pushed into the presence of pushing blade 9 and cleaning case 17, now shell 7
Effect be exactly first to catch this part of seed and tiny debris, and the effect for pushing blade 9 is by this part of seed and thin
Small debris push-in is cleaned in case 17.In addition, the presence of shell 7 also has another to act on, due to being covered with separation barrel 8 point
From hole, under the turning effort of the pusher 6 of separation barrel 8 and first, seed and tiny debris may be from separation barrels 8
Thrown away in any one sorting hole, if now without shell 7, these seeds may be thrown to outside, cause the wave of seed
Take, quality is cleaned in influence.Axial length without will clean case 17 is set equal to the axial length of shell 7, conversely speaking,
Namely the bottom of whole shell 7 also can be directly with clean case 17 and connect, now no longer need setting to push blade 9,
It is contemplated that this kind of setting also implies that the debris import 23 of inner core 18 is also corresponding larger, so for induced-draught fan 13
Power requirement is very big, it is difficult to suitable gettering effect is obtained, therefore not as the presently preferred embodiments.
In the other embodiment of united reaper：The watt level of axial length and induced-draught fan according to shell, cleans
The axial length of case also can be consistent with the axial length of shell, now pushes blade without setting；First pusher and second is pushed away
The rotary shaft for transporting device can not also be connected by shaft coupling, but each own single drive system；Separation barrel and shell
Can be angularly disposed, can now be not provided with pushing blade on separation barrel outer peripheral face；The outside of separation barrel can not set
Shell is put, now blade is pushed without setting, now separation barrel can fix non-rotary, can be only in separation barrel
Bottom open up the sorting hole for only being spilt for seed and tiny debris；Inner core can not be positioned at middle part, such as inner core can be with
The side box wall for cleaning case is sticked, and now only one of which passage falls for seed and tiny debris；Clean the air inlet of case lower end
Can also be vertical；Clean the depressed part that can also be not provided with being inwardly recessed on the tank wall of case.
For example shown in Fig. 1 ~ Fig. 4, the concrete structure of compound cleaning and sorting system combines receipts with above-mentioned for the implementation of compound cleaning and sorting system
Compound cleaning and sorting system structure described in cutting mill embodiment is identical, will not be described in detail herein.
Claims (10)
1. cleaning and sorting system is combined, it is characterised in that：One end is provided with the separation that material inlet, the other end are provided with straw outlet
Roller, is provided with separation barrel for material first to be pushed from what straw outlet end was pushed at the material inlet end of separation barrel to
Device, offers the sorting hole for only being spilt for the seed in material and tiny debris on separation barrel, the lower section of separation barrel is set
Having clean case for receive the seed and tiny debris, cleans and inner core is provided with case, the side of the inner core with clean
The passage fallen for seed and tiny debris is formed between the tank wall of case, the lower end of the inner core is provided with the air draught with induced-draught fan
The debris import of mouth connection is so that seed and tiny debris can be through debris import and air draughts by tiny debris after the passage
Case is cleaned in machine discharge.
2. compound cleaning and sorting system according to claim 1, it is characterised in that：Clean on the tank wall of case in the end of the passage
End is provided with the depressed part being inwardly recessed, and the depressed part has seed and the guiding debris import of tiny debris that will fall so far
The spigot surface of lower section.
3. compound cleaning and sorting system according to claim 2, it is characterised in that：The lower end for cleaning the depressed part of case is set
There is abducent air inlet.
4. the compound cleaning and sorting system according to claim 1 ~ 3 any one, it is characterised in that：The inner core is located at and cleans case
Interior middle part, the passage has two and is symmetrically positioned in the both sides of inner core, is provided with to be slid to described for material at the top of inner core and leads to
The inclined-plane in road.
5. compound cleaning and sorting system according to claim 4, it is characterised in that：It is square below the inclined-plane of the inner core, side
The passage, two other symmetric side of square inner core are formed between two symmetric sides of shape inner core and the tank wall for cleaning case
On be respectively arranged with ventilation duct, the inside of one end of the ventilation duct with square inner core connects, after two ventilation ducts cross
The other end is connected with the inlet scoop of the induced-draught fan.
6. the compound cleaning and sorting system according to claim 1 ~ 3 any one, it is characterised in that：The outside of separation barrel is arranged
There is shell, the bottom of shell offers and cleans the blanking port that case connects, the axial length for cleaning case is long less than the axial direction of shell
Degree, to be provided with the outer peripheral face of separation barrel and push blade for push the seed in shell and tiny debris to blanking port.
7. united reaper, including frame, is provided with compound cleaning and sorting system in frame, it is characterised in that：Compound cleaning and sorting system bag
Include one end and be provided with the separation barrel that material inlet, the other end are provided with straw outlet, be provided with separation barrel for by material
Push first pusher at straw outlet end to from the material inlet end of separation barrel, offered on separation barrel only for the seed in material
Grain and the sorting hole that spills of tiny debris, are provided with below separation barrel for receiving cleaning for the seed and tiny debris
Case, cleans and inner core is provided with case, is formed under seed and tiny debris between the side of the inner core and the tank wall for cleaning case
The passage for falling, the lower end of the inner core is provided with the debris import connected with the inlet scoop of induced-draught fan so that seed and tiny debris
Can be discharged through debris import and induced-draught fan by tiny debris after the passage and clean case.
8. united reaper according to claim 7, it is characterised in that：Clean on the tank wall of case in the end of the passage
The depressed part being inwardly recessed is provided with, the depressed part has under the seed and the guiding debris import of tiny debris that will fall so far
The spigot surface of side.
9. united reaper according to claim 8, it is characterised in that：The lower end for cleaning the depressed part of case is provided with
Abducent air inlet.
10. the united reaper according to claim 7 ~ 9 any one, it is characterised in that：The inner core is located at and cleans case
Interior middle part, the passage has two and is symmetrically positioned in the both sides of inner core, is provided with to be slid to described for material at the top of inner core and leads to
The inclined-plane in road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621203769.4U CN206196384U (en) | 2016-11-08 | 2016-11-08 | United reaper and its compound cleaning and sorting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621203769.4U CN206196384U (en) | 2016-11-08 | 2016-11-08 | United reaper and its compound cleaning and sorting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206196384U true CN206196384U (en) | 2017-05-31 |
Family
ID=58753156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621203769.4U Expired - Fee Related CN206196384U (en) | 2016-11-08 | 2016-11-08 | United reaper and its compound cleaning and sorting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206196384U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106342491A (en) * | 2016-11-08 | 2017-01-25 | 河南科技大学 | Combine harvester and composite sorting system thereof |
| CN107360808A (en) * | 2017-06-27 | 2017-11-21 | 常州市协旺纺织品有限公司 | A kind of cereal conveys separation cleaning machine |
-
2016
- 2016-11-08 CN CN201621203769.4U patent/CN206196384U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106342491A (en) * | 2016-11-08 | 2017-01-25 | 河南科技大学 | Combine harvester and composite sorting system thereof |
| CN107360808A (en) * | 2017-06-27 | 2017-11-21 | 常州市协旺纺织品有限公司 | A kind of cereal conveys separation cleaning machine |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170531 Termination date: 20191108 |
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| CF01 | Termination of patent right due to non-payment of annual fee |