CN112484673A - Intelligent modeling paint smoothness detection equipment for jet engine hood - Google Patents
Intelligent modeling paint smoothness detection equipment for jet engine hood Download PDFInfo
- Publication number
- CN112484673A CN112484673A CN202011277184.8A CN202011277184A CN112484673A CN 112484673 A CN112484673 A CN 112484673A CN 202011277184 A CN202011277184 A CN 202011277184A CN 112484673 A CN112484673 A CN 112484673A
- Authority
- CN
- China
- Prior art keywords
- inner cavity
- magnetic
- shell
- jet engine
- fixedly connected
- 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.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/30—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces
- G01B11/306—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces for measuring evenness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
- B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
- B41J3/4073—Printing on three-dimensional objects not being in sheet or web form, e.g. spherical or cubic objects
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
- B41J3/44—Typewriters or selective printing mechanisms having dual functions or combined with, or coupled to, apparatus performing other functions
- B41J3/445—Printers integrated in other types of apparatus, e.g. printers integrated in cameras
Abstract
The invention relates to the technical field of paint spraying engines and discloses intelligent molded paint surface smoothness detection equipment for a jet engine hood, which comprises a shell, wherein the left wall and the right wall of an inner cavity of the shell are fixedly connected with positioning frames, the upper ends and the lower ends of the positioning frames are fixedly connected with symmetrical magnetic tracks, the inner cavity of the magnetic tracks is connected with an inductive block in a sliding manner, an electromagnetic ring is fixedly installed between the magnetic tracks of the inner cavity of the positioning frames, and one side, far away from the electromagnetic ring, of the inner cavity of the positioning frames is connected with a magnetic seat in a sliding manner. This intelligence system molding lacquer painting smoothness check out test set that jet-propelled engine hood used, through the appropriate transform of magnetic force size of electromagnetic ring, corresponding messenger's movable frame removes, drives the piston pull rod and moves in pneumatic cylinder, and automatic extraction marking liquid only needs the test piece to promote to the board removal when deuterogamying the detection to effectively avoided the condition that the marking liquid runs out on the way in the detection, effectual promotion to the detection rate of lacquer painting.
Description
Technical Field
The invention relates to the technical field of jet engines, in particular to intelligent molded paint smoothness detection equipment for a jet engine hood.
Background
At present, when the jet engine is actually applied to the inside of the engine body, the outside of the jet engine needs to be sleeved with a corresponding engine hood so as to protect the engine, the engine hood also needs to be subjected to paint spraying and corrosion prevention treatment in the production and processing process and needs to ensure certain paint smoothness, the paint smoothness detection equipment for the general jet engine hood needs to hold detection marking equipment to mark a flaw part on a paint surface at any time by personnel in the using process, marking liquid in the marking equipment is used up at any time, so that the addition of the marking liquid needs to be noticed by operators at any time, and the detection equipment is troublesome and cannot continuously and quickly detect the paint surface, so that the corresponding detection rate is low.
Aiming at the defects of the prior art, the invention provides intelligent molded paint smoothness detection equipment for an air jet engine hood, which has the advantages of effectively avoiding the condition that the marking liquid is used up in the detection process, effectively improving the detection rate of the paint and the like, and solves the problems that when the general paint smoothness detection equipment for the air jet engine hood is used, the marking liquid is used up in the detection process when a person holds the detection marking equipment, the marking liquid needs to be added by himself, and the detection efficiency of the paint is lower.
Disclosure of Invention
In order to effectively avoid the situation that the marking liquid is used up in the detection process, effectively improve the detection rate of the paint surface and the like, the invention provides the following technical scheme: an intelligent modeling paint surface smoothness detection device for an air jet engine cover comprises a shell, wherein a positioning frame is fixedly connected to the left wall and the right wall of an inner cavity of the shell, symmetrical magnetic tracks are fixedly connected to the upper end and the lower end of the positioning frame, an induction block is slidably connected to the inner cavity of the magnetic tracks, an electromagnetic ring is fixedly installed between the inner cavity magnetic tracks of the positioning frame, a magnetic seat is slidably connected to one side, away from the electromagnetic ring, of the inner cavity of the positioning frame, a connecting rod extending to the induction block is movably connected to the magnetic seat, an elastic wedge column is fixedly connected to one end, close to the electromagnetic ring, of the magnetic seat, a liquid storage strip is fixedly installed in the middle of the inner cavity of the shell, a movable frame is slidably connected to the upper portion of the liquid storage strip, a limiting spring is fixedly connected between the movable frame and the liquid storage strip, and air compression bags are fixedly installed in, the utility model discloses a portable solar energy storage battery, including activity roof block, liquid storage strip, piston pull rod, elastic sliding column, the equal sliding connection in left part and the equal sliding connection in right part of activity roof block and activity frame has the activity roof block that extends to on the pressure gasbag, fixedly connected with supporting spring between activity roof block and the activity frame, the pneumatic cylinder of lower part fixedly connected with symmetry of liquid storage strip, the inner chamber sliding connection of pneumatic cylinder has the piston pull rod that extends to on the activity frame, the equal sliding connection in inner chamber left part and the right part of casing has elastic sliding column, elastic sliding column is close to the one end fixedly connected with butt knee of activity frame, the bottom left side fixed mounting of casing has the strip that is in the light, the left side fixed mounting that the bottom of casing was in the light strip has the lamp pearl, the right side fixed mounting.
Preferably, the bottom of the shell is fixedly connected with a slide bar matched with the comparison plate, the comparison plate is movably sleeved on the slide bar, and the comparison plate is elastically connected with the slide bar.
Preferably, the magnetic ring is electrified to have a magnetic pole opposite to that of the surface adjacent to the magnetic seat.
Preferably, the stiffness coefficient of the limiting spring is larger than that of the supporting spring.
Preferably, the surface of the elastic sliding column is provided with a groove matched with the movable ejector block, and the arc-shaped end on the movable ejector block extends into the groove in an initial state.
Preferably, the lower end of the elastic sliding column is rotatably connected with a guide roller matched with the elastic wedge column.
Preferably, the lower end of the light blocking strip is fixedly provided with a nozzle, and an air groove port is formed between the nozzles at the lower end of the light blocking strip.
Advantageous effects
Compared with the prior art, the invention provides intelligent molded paint smoothness detection equipment for an air jet engine cover, which has the following beneficial effects:
1. this intelligence system molding finish smoothness check out test set that jet-propelled engine cover was used, it is luminous not to open the lamp pearl through the initial, only supply power to the electromagnetism ring of both sides, because photosensitive resistance can not receive bright, the resistance heavy current in the electromagnetism ring place circuit is little, the electromagnetism ring can only attract the magnetic base to remove the segment distance along the inner chamber of locating frame, make elasticity wedge post driven removal, and make the elasticity sliding post of both sides extruded rebound, the arc end on the activity kicking block slides out from the recess promptly, synchronous activity kicking block extrusion pressure gasbag, make the outside blowout gas of lower extreme gas tank to the strip that is in the light, clean the surface to the board in advance, thereby the effectual detection precision to the finish smoothness that has promoted.
2. This intelligence system molding lacquer painting smoothness check out test set that jet-propelled engine cover was used, finish the back to the board cleanness through the contrast, it is luminous to open the lamp pearl, make compare on refracting light to the photo resistance to the board, the current increase in the circuit of electromagnetic ring, the magnetism seat is attracted promptly and is removed more distances, what correspond just with the butt knee of movable frame butt, then promote movable frame rebound certain distance, make the automatic mark liquid that will store up in the liquid strip of piston pull rod take out to the pneumatic cylinder in, the design of this structure need not the staff and adds mark liquid by oneself, thereby effectively avoided detecting the condition that mark liquid used up on the way.
3. After the intelligent molded paint smoothness detection equipment for the jet engine hood is debugged, the engine cover to be detected can be arranged at the left side of the opposite plate, the opposite plate is gradually and horizontally pressed, when the surface of the engine cover has flaws, the light reflection rate is reduced, correspondingly, the magnetic force of the electromagnetic ring is reduced, the elastic wedge column is reset for a part of distance, the piston pull rod is reset for a corresponding distance, the marking liquid in the air pressure cylinder is extruded to the nozzle at the lower end of the light blocking strip and is sprayed to the corresponding paint surface mark, because the engine cover continuously moves, when the elastic wedge column drives the magnetic seat to move with a certain amplitude, the inductive block can also move up and down in the magnetic track, and then make the pilot lamp at casing top light, the user of service can be according to the frequency of lighting of pilot lamp, the smooth degree of whole lacquer painting of audio-visual convenient judgement to effectual detection rate to the lacquer painting that has promoted.
Drawings
FIG. 1 is a front cross-sectional view of the present invention;
FIG. 2 is a front cross-sectional view of a connection portion such as a resilient wedge of the present invention;
FIG. 3 is a front cross-sectional view of a connecting portion of a reservoir strip or the like in accordance with the present invention;
fig. 4 is a front sectional view of a connecting portion such as a movable frame of the present invention.
In the figure: 1. a housing; 2. a positioning frame; 3. a magnetic track; 4. an inductive block; 5. an electromagnetic ring; 6. a magnetic base; 7. a connecting rod; 8. an elastic wedge column; 9. a liquid storage strip; 10. a movable frame; 11. a limiting spring; 12. pressing the air bag; 13. a movable top block; 14. a support spring; 15. an air pressure cylinder; 16. a piston rod; 17. an elastic strut; 18. abutting against the bent rod; 19. a light blocking strip; 20. a lamp bead; 21. a photoresistor; 22. and (6) comparing the plates.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, an intelligent molded paint surface smoothness detection device for a jet engine cover comprises a shell 1, an indicator lamp is fixedly installed at the top of the shell 1, a slide rod matched with a comparison plate 22 is fixedly connected to the bottom of the shell 1, the comparison plate 22 is movably sleeved on the slide rod, the comparison plate 22 is elastically connected with the slide rod, a positioning frame 2 is fixedly connected to the left wall and the right wall of an inner cavity of the shell 1, symmetrical magnetic tracks 3 are fixedly connected to the upper end and the lower end of the positioning frame 2, an inner cavity of the magnetic track 3 is slidably connected with a sensing block 4, an electromagnetic ring 5 is fixedly installed between the magnetic tracks 3 in the inner cavity of the positioning frame 2, the magnetic poles of the surfaces adjacent to a magnetic seat 6 after the electromagnetic ring 5 is electrified are opposite, the electromagnetic ring is luminous through a lamp bead 20 which is not opened initially, only the electromagnetic rings 5 on two sides are powered, and the photosensitive resistor 21 does not receive the light, so, the electromagnetic ring 5 can only attract the magnetic base 6 to move a small distance along the inner cavity of the positioning frame 2, so that the elastic wedge column 8 is driven to move, the elastic sliding columns 17 on the two sides are extruded to move upwards, the arc-shaped end on the movable top block 13 slides out of the groove, the movable top block 13 is extruded to press the air bag 12 synchronously, so that the lower end air groove of the light blocking strip 19 sprays gas outwards, the surface of the plate 22 is cleaned in advance, and the detection precision of the smoothness of the painted surface is effectively improved.
A magnetic seat 6 is slidably connected to one side of an inner cavity of the positioning frame 2, which is far away from the electromagnetic ring 5, a connecting rod 7 extending to the sensing block 4 is movably connected to the magnetic seat 6, an elastic wedge 8 is fixedly connected to one end of the magnetic seat 6, which is close to the electromagnetic ring 5, a liquid storage bar 9 is fixedly installed in the middle of the inner cavity of the shell 1, a movable frame 10 is slidably connected to the upper portion of the liquid storage bar 9, a limit spring 11 is fixedly connected between the movable frame 10 and the liquid storage bar 9, the stiffness coefficient of the limit spring 11 is greater than that of the support spring 14, air compression bags 12 are fixedly installed in the left and right inner cavities of the movable frame 10, movable top blocks 13 extending to the air compression bags 12 are slidably connected to the left and right inner cavities of the movable frame 10, the support spring 14 is fixedly connected between the movable top blocks 13 and the movable frame 10, symmetrical air pressure cylinders 15 are fixedly connected to the lower portion of, open lamp pearl 20 and give out light, make than refract light to photo resistance 21 to board 22 on, the electric current increase in the circuit of electromagnetic ring 5, magnetism seat 6 is attracted promptly and removes more distances, the butt knee 18 of corresponding just with movable frame 10 butt, then promote movable frame 10 and upwards remove certain distance, make the automatic marking liquid that will stock solution strip 9 of piston pull rod 16 take out to pneumatic cylinder 15 in, the design of this structure need not the staff and adds marking liquid by oneself, thereby effectively avoided the condition that the marking liquid used up on the way of detecting.
A piston pull rod 16 extending to the movable frame 10 is connected in a sliding manner to the inner cavity of the air pressure cylinder 15, elastic sliding columns 17 are connected in a sliding manner to the left and right parts of the inner cavity of the shell 1, grooves matched with the movable top blocks 13 are formed in the surfaces of the elastic sliding columns 17, arc-shaped ends on the movable top blocks 13 extend into the grooves in an initial state, guide rollers matched with the elastic wedge columns 8 are rotatably connected to the lower ends of the elastic sliding columns 17, abutting bent rods 18 are fixedly connected to one ends of the elastic sliding columns 17, which are close to the movable frame 10, light blocking strips 19 are fixedly installed on the left side of the bottom of the shell 1, nozzles are fixedly installed at the lower ends of the light blocking strips 19, air channel ports are formed between the nozzles at the lower ends of the light blocking strips 19, lamp beads 20 are fixedly installed on the left side of the light blocking strips 19 at the bottom of the shell 1, photoresistors 21 are fixedly installed on the right side of, after the equipment is debugged, the engine cover to be detected can be placed on the left side of the comparison plate 22, the comparison plate 22 is gradually horizontally pressed, when the surface of the engine cover has flaws, the light reflection rate is reduced, the corresponding magnetic force of the electromagnetic ring 5 is reduced, the elastic wedge column 8 is reset for a part of distance, the piston pull rod 16 is reset for a corresponding distance, the marking liquid in the air pressure cylinder 15 is extruded to a nozzle at the lower end of the light blocking strip 19 and is sprayed to a corresponding paint surface mark, because the engine cover device continuously moves, when the elastic wedge column 8 drives the magnetic seat 6 to move with a certain amplitude, the inductive block 4 can also move up and down in the magnetic track 3, and then make the pilot lamp at 1 top of casing light, the user of service can be according to the frequency of lighting of pilot lamp, the smooth degree of whole lacquer painting of audio-visual convenient judgement to effectual detection rate to the lacquer painting that has promoted.
The working principle is as follows: the intelligent modeling paint surface smoothness detection equipment for the jet engine hood only supplies power to the electromagnetic rings 5 on two sides by not opening the lamp beads 20 to emit light initially, because the light dependent resistors 21 cannot receive light, the resistance large current in the circuit where the electromagnetic rings 5 are located is small, the electromagnetic rings 5 only can attract the magnetic seat 6 to move for a small distance along the inner cavity of the positioning frame 2, so that the elastic wedge columns 8 are driven to move, the elastic sliding columns 17 on two sides are extruded by the elastic wedge columns 8 to move upwards, the arc-shaped ends on the movable top blocks 13 slide out of the grooves in the surfaces of the elastic wedge columns 8, the synchronous abutting bent rods 18 are just driven to move to be attached to the side walls of the movable frame 10, the movable top blocks 13 extrude and press the air bags 12, so that the air grooves at the lower ends of the light blocking strips 19 spray air outwards, the surfaces of the opposite plates 22 are cleaned in advance, and the smoothness of the paint surfaces of the opposite plates 22 is consistent with the smoothness of, and then be convenient for the later stage to detect the finish of engine bonnet can have the reference standard, thereby the detection precision to the finish smoothness has effectively been promoted, after finishing to contrast to board 22, open lamp pearl 20 and give out light, make to reflect light to on photo resistance 21 to board 22, the electric current in the circuit of electromagnetic ring 5 increases, magnetism seat 6 is attracted to move more distances promptly, the corresponding butt knee 18 that just supports with movable frame 10, then promote movable frame 10 and move certain distance upwards, make piston pull rod 16 automatically take out the marking fluid in stock solution strip 9 to pneumatic cylinder 15, the design of this structure need not the staff and add marking fluid by oneself, thereby effectively avoided the condition that the marking fluid used up on the way of detecting, after finishing to the equipment debugging, can arrange the engine bonnet that waits to detect in than the left side to board 22, gradually horizontal extrusion is to board 22, when there is the flaw on the surface of engine bonnet, its reflection rate can reduce promptly, the corresponding magnetic force that leads to electromagnetic ring 5 reduces, elastic wedge post 8 resets partial distance, piston pull rod 16 resets corresponding distance equally, crowd the nozzle of 19 lower extremes in the light bar of being in the shade with the mark liquid in the pneumatic cylinder 15, spout to the lacquer painting mark that corresponds, confirm the problem point when being convenient for later stage maintenance, because engine bonnet puts and is moving continuously, during the period elastic wedge post 8 drives magnetic seat 6 and has certain amplitude's removal, still can lead to the electric induction piece 4 to reciprocate in magnetic track 3, and then make the pilot lamp at casing 1 top light, the user of service can be according to the frequency of lighting of pilot lamp, the smooth degree of whole lacquer painting of audio-visual convenient judgement, thereby effectual promotion is to the detection rate of lacquer painting.
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 (7)
1. The utility model provides an intelligence system molding lacquer painting smoothness check out test set that jet engine hood used, includes casing (1), its characterized in that: the magnetic suspension type magnetic suspension device is characterized in that a positioning frame (2) is fixedly connected to the left wall and the right wall of an inner cavity of the shell (1), magnetic tracks (3) which are symmetrical are fixedly connected to the upper end and the lower end of the positioning frame (2), an inductive block (4) is connected to the inner cavity of the magnetic tracks (3), an electromagnetic ring (5) is fixedly installed between the inner cavity magnetic tracks (3) of the positioning frame (2), a magnetic base (6) is connected to one side, far away from the electromagnetic ring (5), of the inner cavity of the positioning frame (2) in a sliding mode, a connecting rod (7) extending to the inductive block (4) is movably connected to the magnetic base (6), an elastic wedge column (8) is fixedly connected to one end, close to the electromagnetic ring (5), of the magnetic base (6), a liquid storage strip (9) is fixedly installed in the middle of the inner cavity of the shell (1), a movable frame (10) is connected to the upper portion of the liquid storage strip (9) in a, the light-shielding and light-shielding integrated water tank is characterized in that a pressure air bag (12) is fixedly mounted on the left portion and the right portion of an inner cavity of the movable frame (10), a movable ejection block (13) extending to the pressure air bag (12) is connected to the left portion and the right portion of the inner cavity of the movable frame (10) in an equal sliding manner, a supporting spring (14) is fixedly connected between the movable ejection block (13) and the movable frame (10), a symmetrical air cylinder (15) is fixedly connected to the lower portion of the liquid storage strip (9), a piston pull rod (16) extending to the movable frame (10) is connected to the inner cavity of the air cylinder (15) in a sliding manner, an elastic sliding column (17) is connected to the left portion and the right portion of the inner cavity of the shell (1) in an equal sliding manner, an abutting bent rod (18) is fixedly connected to one end, close to the movable frame (10), a light-shielding strip (19) is fixedly mounted on the left side of the bottom of the shell (, the right side of the light blocking strip (19) at the bottom of the shell (1) is fixedly provided with a photosensitive resistor (21), and the lower part of the light blocking strip (19) at the bottom of the shell (1) is connected with a contrast plate (22) in a sliding manner.
2. The intelligent molded paint smoothness detection device for the jet engine cover according to claim 1, characterized in that: the bottom of the shell (1) is fixedly connected with a sliding rod matched with the comparison plate (22).
3. The intelligent molded paint smoothness detection device for the jet engine cover according to claim 1, characterized in that: the electromagnetic ring (5) is opposite to the magnetic pole of the surface adjacent to the magnetic seat (6) after being electrified.
4. The intelligent molded paint smoothness detection device for the jet engine cover according to claim 1, characterized in that: the stiffness coefficient of the limiting spring (11) is larger than that of the supporting spring (14).
5. The intelligent molded paint smoothness detection device for the jet engine cover according to claim 1, characterized in that: the surface of the elastic sliding column (17) is provided with a groove matched with the movable top block (13).
6. The intelligent molded paint smoothness detection device for the jet engine cover according to claim 1, characterized in that: the lower end of the elastic sliding column (17) is rotatably connected with a guide roller matched with the elastic wedge column (8).
7. The intelligent molded paint smoothness detection device for the jet engine cover according to claim 1, characterized in that: and the lower end of the light blocking strip (19) is fixedly provided with a nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011277184.8A CN112484673A (en) | 2020-11-16 | 2020-11-16 | Intelligent modeling paint smoothness detection equipment for jet engine hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011277184.8A CN112484673A (en) | 2020-11-16 | 2020-11-16 | Intelligent modeling paint smoothness detection equipment for jet engine hood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112484673A true CN112484673A (en) | 2021-03-12 |
Family
ID=74930504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011277184.8A Withdrawn CN112484673A (en) | 2020-11-16 | 2020-11-16 | Intelligent modeling paint smoothness detection equipment for jet engine hood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112484673A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113446923A (en) * | 2021-08-24 | 2021-09-28 | 烟台华虹建筑科技有限公司 | Steel construction installation engineering check out test set |
-
2020
- 2020-11-16 CN CN202011277184.8A patent/CN112484673A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113446923A (en) * | 2021-08-24 | 2021-09-28 | 烟台华虹建筑科技有限公司 | Steel construction installation engineering check out test set |
| CN113446923B (en) * | 2021-08-24 | 2022-07-05 | 烟台中晟金属制造有限公司 | Steel structure installation engineering detection equipment |
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Application publication date: 20210312 |