CN213760553U - Reaction tower for rectifying grease - Google Patents
Reaction tower for rectifying grease Download PDFInfo
- Publication number
- CN213760553U CN213760553U CN202022380581.XU CN202022380581U CN213760553U CN 213760553 U CN213760553 U CN 213760553U CN 202022380581 U CN202022380581 U CN 202022380581U CN 213760553 U CN213760553 U CN 213760553U
- Authority
- CN
- China
- Prior art keywords
- fixedly connected
- reaction tower
- inner chamber
- support column
- grease
- 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.)
- Expired - Fee Related
Links
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 77
- 239000004519 grease Substances 0.000 title claims abstract description 19
- 230000005540 biological transmission Effects 0.000 claims abstract description 22
- 238000009434 installation Methods 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000007792 gaseous phase Substances 0.000 claims abstract description 10
- 230000008676 import Effects 0.000 claims abstract description 10
- 239000007921 spray Substances 0.000 claims abstract description 10
- 241000220317 Rosa Species 0.000 claims abstract description 9
- 244000309464 bull Species 0.000 claims abstract description 8
- 239000007791 liquid phase Substances 0.000 claims abstract description 8
- 239000003351 stiffener Substances 0.000 claims abstract description 6
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims 4
- 239000007788 liquid Substances 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 7
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 239000012071 phase Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 7
- 238000005192 partition Methods 0.000 description 3
- 238000010992 reflux Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000016507 interphase Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Landscapes
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The utility model discloses a reaction tower of rectification grease, which comprises a supporting column, the quantity of support column is four, controls fixedly connected with connecting plate between the support column, and the fixed case of fixedly connected with between the front and back support column controls the equal fixedly connected with transmission case in the opposite one side of fixed case, controls the equal fixedly connected with installation shell in the relative one side of fixed case, the rear side of bull stick runs through to the rear side of transmission case. The utility model discloses a set up support column, stiffener, liquid phase export, connecting plate, fixed case, rose box, column plate, gaseous phase export, backward flow import, reaction tower, bull stick, transmission case, gaseous phase import, initiative bevel gear, driven bevel gear, installation shell, spacing shell, casing, fixed pin, lead screw, micro-water pump, stopper, spray line, picture peg and filter plate cooperation use, it is more abundant to possess the gas-liquid contact, has prolonged contact time, and the rectification effect is better, the stronger advantage of stability.
Description
Technical Field
The utility model relates to a grease rectification technical field specifically is a reaction tower of rectification grease.
Background
Rectification is a separation process in which the components in a mixture are separated by virtue of their different volatilities, and the conventional equipment includes a plate-type rectification column and a packed rectification column. The principle and the equipment flow of the precision rectification are the same as those of the common rectification, but the relative volatility of the components in the object system to be separated is small (< 1.05-1.10), so that the components to be separated are separated and purified by adopting the high-efficiency precision packing.
The grease rectification is usually carried out in a rectification reaction tower, gas-liquid two phases are contacted through countercurrent to carry out interphase heat and mass transfer, the gas-liquid contact area in the existing reaction tower is small, the time is short, the contact is insufficient, the rectification effect is poor, the efficiency is low, and because the height of the reaction tower is higher, the supporting structure at the bottom of the reaction tower is simpler, the stability is poor, and the risk of inclination exists in severe weather.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a reaction tower of rectification grease possesses the gas-liquid contact more fully, has prolonged contact time, and the rectification effect is better, and the advantage that stability is stronger has solved that the interior gas-liquid area of contact of current reaction tower is little, the time is short, and the contact is insufficient, leads to the rectification effect not good, and is inefficient, and the bearing structure of bottom comparatively simply leads to stability relatively poor, has the problem of slope risk in bad weather.
In order to achieve the above object, the utility model provides a following technical scheme: a reaction tower for rectifying grease comprises four support columns, a connecting plate is fixedly connected between a left support column and a right support column, a fixing box is fixedly connected between a front support column and a rear support column, one opposite side of the left and right fixing boxes is fixedly connected with a transmission box, one opposite side of the left and right fixing boxes is fixedly connected with an installation shell, an inner cavity of the transmission box is movably connected with a rotating rod, the rear side of the rotating rod penetrates through the rear side of the transmission box, a driving bevel gear is sleeved on the surface of the rotating rod, an inner cavity of the fixing box is fixedly connected with a shell, the inner cavity of the shell is movably connected with a fixing pin, an inner cavity of the fixing pin is in threaded connection with a lead screw, one opposite side of the left and right lead screws penetrates through the inner cavity of the transmission box and is sleeved with a driven bevel gear matched with the, a reaction tower is arranged between the front connecting plate and the rear connecting plate, both sides of the reaction tower are fixedly connected with inserting plates, the bottom of the inserting plate penetrates through the inner cavity of the mounting shell, the bottom of the reaction tower is communicated with a liquid phase outlet, the bottom of the right side of the reaction tower is communicated with a gas phase inlet, the top of the reaction tower is communicated with a gas phase outlet, the top of the right side of the reaction tower is communicated with a reflux inlet, the inner cavity of the reaction tower is fixedly connected with a tower plate, the top of the left side of the inner cavity of the reaction tower is fixedly connected with a spray pipe, the top of the left side of the reaction tower is fixedly connected with a filter box, the inner cavity of the filter box is movably connected with a filter screen plate, the inner cavity of the filter box is fixedly connected with a clapboard, the bottom fixedly connected with miniature pump of rose box inner chamber, miniature pump's feed liquor pipe runs through to the top of baffle, miniature pump's drain pipe runs through to the inner chamber of reaction tower and communicates with the spray pipe.
Preferably, the rear side of the rotating rod is fixedly connected with a rotating handle, and the connecting part of the surface of the rotating rod and the transmission case is movably connected through a bearing.
Preferably, the top and the bottom of the fixed pin are both fixedly connected with sliding blocks, sliding grooves are formed in the top and the bottom of the inner cavity of the shell, and one side, away from the fixed pin, of each sliding block extends to the inner cavity of each sliding groove.
Preferably, the middle part of the opposite side of the front and back connecting plates is fixedly connected with a limit shell, the middle parts of the front and back sides of the reaction tower are fixedly connected with limit blocks, and one side of each limit block, which is far away from the reaction tower, extends to the inner cavity of the limit shell.
Preferably, the front side of the reaction tower is fixedly connected with an observation window in a penetrating way, and the front side of the filter box is movably connected with a box door through a hinge and is subjected to sealing treatment.
Preferably, equal fixedly connected with stiffener between front and back support column and the left and right sides support column, the equal fixedly connected with water conservancy diversion piece in both sides at baffle top.
Compared with the prior art, the beneficial effects of the utility model are as follows:
1. the utility model discloses a set up support column, stiffener, liquid phase export, connecting plate, fixed case, rose box, column plate, gaseous phase export, backward flow import, the reaction tower, the bull stick, the transmission case, gaseous phase import, initiative bevel gear, driven bevel gear, the installation shell, spacing shell, casing, fixed pin, lead screw, micro-water pump, stopper, spray line, picture peg and filter plate cooperation are used, it is more abundant to possess the gas-liquid contact, contact time has been prolonged, the rectification effect is better, the stronger advantage of stability, be worth promoting.
2. The utility model can conveniently rotate the rotating rod by arranging the rotating handle;
the sliding block and the sliding groove are arranged, so that the fixed pin can move more stably;
the reaction tower can be conveniently and fixedly installed by arranging the limiting shell and the limiting block;
by arranging the observation window, the reaction condition in the reaction tower can be conveniently observed;
through setting up the chamber door, can conveniently take out filter plate, wash it.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a top cross-sectional view of a portion of the structure of the present invention;
FIG. 3 is an enlarged view of A in FIG. 2 according to the present invention;
FIG. 4 is a front sectional view of the reaction tower of the present invention;
fig. 5 is a front sectional view of the filter box of the present invention.
In the figure: the device comprises a support column 1, a reinforcing rod 2, a liquid phase outlet 3, a connecting plate 4, a fixed box 5, a filter box 6, a tower plate 7, a gas phase outlet 8, a reflux inlet 9, a reaction tower 10, a rotating rod 11, a transmission box 12, a gas phase inlet 13, a driving bevel gear 14, a driven bevel gear 15, a mounting shell 16, a limiting shell 17, a shell 18, a fixing pin 19, a screw rod 20, a miniature water pump 21, a limiting block 22, a spraying pipe 23, a plugboard 24 and a filter screen plate 25.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. 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.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to be referred must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "connected", and the like are to be construed broadly, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The utility model provides a support column 1, stiffener 2, liquid phase export 3, connecting plate 4, fixed case 5, rose box 6, column plate 7, gaseous phase export 8, backward flow import 9, reaction tower 10, bull stick 11, transmission case 12, gaseous phase import 13, initiative bevel gear 14, driven bevel gear 15, installation shell 16, spacing shell 17, casing 18, fixed pin 19, lead screw 20, micro-water pump 21, stopper 22, spray pipe 23, parts such as picture peg 24 and filter plate 25 are general standard or the part that technical staff in the field knows, its structure and principle all can learn through the technical manual or learn through conventional experimental method for technical staff in the field.
Referring to fig. 1-5, a reaction tower for rectifying grease comprises four support columns 1, a connecting plate 4 is fixedly connected between a left support column 1 and a right support column 1, a fixing box 5 is fixedly connected between a front support column 1 and a rear support column 1, a transmission box 12 is fixedly connected on one side opposite to the left fixing box 5 and the right fixing box 5, a mounting shell 16 is fixedly connected on one side opposite to the left fixing box 5, a rotating rod 11 is movably connected in an inner cavity of the transmission box 12, the rear side of the rotating rod 11 penetrates through the rear side of the transmission box 12, a driving bevel gear 14 is sleeved on the surface of the rotating rod 11, a shell 18 is fixedly connected in the inner cavity of the fixing box 5, a fixing pin 19 is movably connected in the inner cavity of the shell 18, a lead screw 20 is connected in the inner cavity of the fixing pin 19 in a threaded manner, one side opposite to the left lead screw 20 penetrates through the inner cavity of the transmission box 12 and is sleeved with a driven bevel gear 15 used in cooperation with the driving bevel gear 14, the opposite sides of the left and right fixing pins 19 penetrate the outer side of the mounting shell 16, a reaction tower 10 is arranged between the front and rear connecting plates 4, the two sides of the reaction tower 10 are fixedly connected with inserting plates 24, the bottom of the inserting plates 24 penetrates the inner cavity of the mounting shell 16, the bottom of the reaction tower 10 is communicated with a liquid phase outlet 3, the bottom of the right side of the reaction tower 10 is communicated with a gas phase inlet 13, the top of the reaction tower 10 is communicated with a gas phase outlet 8, the top of the right side of the reaction tower 10 is communicated with a reflux inlet 9, the inner cavity of the reaction tower 10 is fixedly connected with a tower plate 7, the top of the left side of the inner cavity of the reaction tower 10 is fixedly connected with a spray pipe 23, the top of the left side of the reaction tower 10 is fixedly connected with a filter box 6, the inner cavity of the filter box 6 is movably connected with a filter screen plate 25, the inner cavity of the filter box 6 is fixedly connected with a partition plate, the bottom of the inner cavity of the filter box 6 is fixedly connected with a micro water pump 21, and a liquid inlet pipe of the micro water pump 21 penetrates the top of the partition plate, a liquid outlet pipe of the micro water pump 21 penetrates through the inner cavity of the reaction tower 10 and is communicated with the spraying pipe 23;
the rear side of the rotating rod 11 is fixedly connected with a rotating handle, and the joint of the surface of the rotating rod 11 and the transmission case 12 is movably connected through a bearing;
the top and the bottom of the fixed pin 19 are both fixedly connected with sliding blocks, the top and the bottom of the inner cavity of the shell 18 are both provided with sliding grooves, and one side of each sliding block, which is far away from the fixed pin 19, extends to the inner cavity of each sliding groove;
the middle parts of the opposite sides of the front and rear connecting plates 4 are fixedly connected with limiting shells 17, the middle parts of the front and rear sides of the reaction tower 10 are fixedly connected with limiting blocks 22, and one side of each limiting block 22 far away from the reaction tower 10 extends to the inner cavity of each limiting shell 17;
the front side of the reaction tower 10 is fixedly connected with an observation window in a penetrating way, and the front side of the filter box 6 is movably connected with a box door through a hinge and is sealed;
reinforcing rods 2 are fixedly connected between the front and rear supporting columns 1 and the left and right supporting columns 1, and flow guide blocks are fixedly connected to two sides of the top of the partition plate;
the rotating rod 11 can be conveniently rotated by arranging the rotating handle;
the slide block and the slide groove are arranged, so that the fixed pin 19 can move more stably;
the reaction tower 10 can be conveniently and fixedly installed by arranging the limiting shell 17 and the limiting block 22;
by arranging the observation window, the reaction condition in the reaction tower 10 can be conveniently observed;
by providing the door, the filter screen plate 25 can be easily taken out and cleaned.
When the device is used, the rotating rod 11 rotates reversely, the rotating rod 11 drives the screw rod 20 to rotate reversely through the driving bevel gear 14 and the driven bevel gear 15, the fixing pin 19 is moved out of the inner cavity of the installation shell 16 by the reverse rotating screw rod 20, then the reaction tower 10 is lifted, the inserting plates 24 on two sides of the reaction tower 10 are inserted into the installation shell 16, after the inserting plates are completely inserted, the rotating rod 11 rotates forwards, the fixing pin 19 is inserted into the installation shell 16 again through the connecting structure of the rotating rod 11 and penetrates through the inserting plates 24 to fix the reaction tower 10, so that the reaction tower 10 can be more stable, the phenomenon that the reaction tower 10 is toppled in severe weather is avoided, high-temperature steam enters the reaction tower 10 through the gas phase inlet 13 and then ascends, at the moment, grease is injected into the filter box 6 and is filtered through the filter screen plate 25 in the filter box 6, the filter screen plate 25 can filter other impurities in the grease, and then the micro water pump 21 works to convey the filtered grease to the spraying pipe 23, the oil sprayed out by the spray pipe 23 can be fully contacted with the rising high-temperature steam, and when the oil falls on the tower plate 7, the contact time with the rising high-temperature air can be prolonged, so that the rectification effect is better.
In summary, the following steps: this reaction tower of rectification grease, through support column 1, stiffener 2, liquid phase export 3, connecting plate 4, fixed box 5, rose box 6, column plate 7, gaseous phase export 8, backward flow import 9, reaction tower 10, bull stick 11, transmission case 12, gaseous phase import 13, drive bevel gear 14, driven bevel gear 15, installation shell 16, spacing shell 17, casing 18, fixed pin 19, lead screw 20, micro-water pump 21, stopper 22, spray pipe 23, picture peg 24 and filter plate 25's cooperation is used, it is little to have solved current reaction tower internal gas-liquid area of contact, the time is short, the contact is insufficient, it is not good to lead to the rectification effect, inefficiency, the bearing structure of bottom is comparatively simple leads to stability relatively poor, there is the problem of slope risk in abominable weather.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a reaction tower of rectification grease, includes support column (1), its characterized in that: the quantity of support column (1) is four, controls fixedly connected with connecting plate (4) between support column (1), and fixedly connected with solid fixed box (5) between front and back support column (1) controls the equal fixedly connected with transmission case (12) in the opposite one side of solid fixed box (5), controls the equal fixedly connected with install bin (16) in the opposite one side of solid fixed box (5), the inner chamber swing joint of transmission case (12) has bull stick (11), the rear side of bull stick (11) runs through to the rear side of transmission case (12), the surface cover of bull stick (11) is equipped with initiative bevel gear (14), the inner chamber fixedly connected with casing (18) of solid fixed box (5), the inner chamber swing joint of casing (18) has fixed pin (19), the inner chamber threaded connection of fixed pin (19) has lead screw (20), controls the opposite one side of lead screw (20) and all runs through to the inner chamber of transmission case (12) and overlaps and is equipped with the driven bevel gear (14) that the cooperation was used Bevel gear (15), the outside to installation shell (16) is all run through to the one side that left and right fixed pin (19) is relative, is provided with reaction tower (10) between front and back connecting plate (4), the equal fixedly connected with picture peg (24) in both sides of reaction tower (10), the inner chamber to installation shell (16) is run through to the bottom of picture peg (24), the bottom intercommunication of reaction tower (10) has liquid phase export (3), the bottom intercommunication on reaction tower (10) right side has gaseous phase import (13), the top intercommunication of reaction tower (10) has gaseous phase export (8), the top intercommunication on reaction tower (10) right side has backflow import (9), the inner chamber fixedly connected with column plate (7) of reaction tower (10), the left top fixedly connected with spray tube (23) of reaction tower (10) inner chamber, the left top fixedly connected with rose box (6) of reaction tower (10), the inner chamber swing joint of rose box (6) has filter screen board (25), the inner chamber fixedly connected with baffle of rose box (6), the bottom fixedly connected with miniature pump (21) of rose box (6) inner chamber, the feed liquor pipe of miniature pump (21) runs through to the top of baffle, the drain pipe of miniature pump (21) runs through to the inner chamber of reaction tower (10) and communicates with spray pipe (23).
2. The reaction tower for rectifying the grease as claimed in claim 1, wherein: the rear side of the rotating rod (11) is fixedly connected with a rotating handle, and the joint of the surface of the rotating rod (11) and the transmission case (12) is movably connected through a bearing.
3. The reaction tower for rectifying the grease as claimed in claim 1, wherein: the top and the bottom of fixed pin (19) all fixedly connected with slider, the spout has all been seted up to the top and the bottom of casing (18) inner chamber, and the slider is kept away from the inner chamber that one side of fixed pin (19) extended to the spout.
4. The reaction tower for rectifying the grease as claimed in claim 1, wherein: the equal fixedly connected with in middle part of the relative one side of front and back connecting plate (4) spacing shell (17), the equal fixedly connected with stopper (22) in middle part of both sides around reaction tower (10), one side that reaction tower (10) were kept away from in stopper (22) extends to the inner chamber of spacing shell (17).
5. The reaction tower for rectifying the grease as claimed in claim 1, wherein: the front side of the reaction tower (10) is fixedly connected with an observation window in a penetrating way, and the front side of the filter box (6) is movably connected with a box door through a hinge and is sealed.
6. The reaction tower for rectifying the grease as claimed in claim 1, wherein: equal fixedly connected with stiffener (2) between front and back support column (1) and left and right sides support column (1), the equal fixedly connected with water conservancy diversion piece in both sides at baffle top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022380581.XU CN213760553U (en) | 2020-10-23 | 2020-10-23 | Reaction tower for rectifying grease |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022380581.XU CN213760553U (en) | 2020-10-23 | 2020-10-23 | Reaction tower for rectifying grease |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213760553U true CN213760553U (en) | 2021-07-23 |
Family
ID=76910702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022380581.XU Expired - Fee Related CN213760553U (en) | 2020-10-23 | 2020-10-23 | Reaction tower for rectifying grease |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213760553U (en) |
-
2020
- 2020-10-23 CN CN202022380581.XU patent/CN213760553U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN213760553U (en) | Reaction tower for rectifying grease | |
| CN203333344U (en) | Oil and water separator | |
| CN208741945U (en) | A kind of biogas slurry concentrator that concentrated effect is good | |
| CN207532829U (en) | A kind of low temperature extraction device | |
| CN216025570U (en) | Oil mechanical impurity removing device | |
| CN217887018U (en) | Anti-blocking rectifying tower | |
| CN103978721A (en) | Domestic fine filtration press | |
| CN216725832U (en) | High-efficient NMP waste liquid rectification purification device | |
| CN214571791U (en) | Novel stirring pot for beer brewing | |
| CN215195458U (en) | Device for delaying scaling of steam-water separator of triple-effect evaporation system | |
| CN206240120U (en) | A kind of petrochemical industry oily-water seperating equipment | |
| CN210220256U (en) | Four-cabin solar water tank with electric heating device | |
| CN221133379U (en) | Quick belt cleaning device is used in chinese-medicinal material processing | |
| CN220047115U (en) | Heavy-duty removal tower for toluene chloride production | |
| CN214991588U (en) | Fermenting installation convenient to clearance | |
| CN218306456U (en) | Decompression, low temperature extraction element of chinese-medicinal material | |
| CN216457916U (en) | Novel carbon steel spray tower | |
| CN217746150U (en) | Heat exchanger filter equipment | |
| CN211739925U (en) | Horizontal shell and tube condenser for fatty acid production | |
| CN217163291U (en) | Supersound soxhlet draws equipment | |
| CN220824505U (en) | Combined separating tower | |
| CN219001998U (en) | Vacuum concentration device | |
| CN220801996U (en) | Crystallization kettle for plant extraction | |
| CN211650695U (en) | Condensed water drainage structure of inlet and outlet pipe of cabinet air conditioner evaporator | |
| CN215026120U (en) | N-methylaniline rapid rectifying tower |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210723 |