CN213761002U - Waste gas treatment conveying equipment for environmental protection equipment - Google Patents
Waste gas treatment conveying equipment for environmental protection equipment Download PDFInfo
- Publication number
- CN213761002U CN213761002U CN202022409099.4U CN202022409099U CN213761002U CN 213761002 U CN213761002 U CN 213761002U CN 202022409099 U CN202022409099 U CN 202022409099U CN 213761002 U CN213761002 U CN 213761002U
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- China
- Prior art keywords
- fixedly connected
- filter plate
- plate
- bevel gear
- box body
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- Expired - Fee Related
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- 230000007613 environmental effect Effects 0.000 title claims abstract description 15
- 239000002912 waste gas Substances 0.000 title abstract description 14
- 238000010992 reflux Methods 0.000 claims abstract description 18
- 239000007921 spray Substances 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 238000010030 laminating Methods 0.000 claims description 2
- 230000002026 carminative effect Effects 0.000 claims 1
- 238000001914 filtration Methods 0.000 abstract description 15
- 239000012535 impurity Substances 0.000 abstract description 7
- 230000002349 favourable effect Effects 0.000 abstract 1
- 239000000428 dust Substances 0.000 description 12
- 239000007789 gas Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
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- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The utility model provides a waste gas treatment conveying device for environmental protection equipment, which comprises a box body, wherein the box body is provided with a supporting plate, the supporting plate is provided with a driving motor and a reflux pump, the driving motor is provided with a fourth bevel gear, the reflux pump is provided with a reflux pipe, the reflux pipe is connected with the box body, the box body is provided with an air inlet pipe, the air inlet pipe is provided with a thread sleeve, the thread sleeve is provided with a connecting pipe, the connecting pipe is provided with a second supporting ring, the second supporting ring is provided with a second spring, the second spring is provided with a second filter plate, the second filter plate is provided with a second hemispherical block, the air inlet pipe is provided with a rotating shaft, the rotating shaft is provided with a third bevel gear, the rotating shaft is provided with a fan blade, the rotating shaft is provided with an L-shaped push plate, the rotating shaft is provided with a second bevel gear, the box body is provided with a first connecting plate, the first connecting plate is provided with a first rotating rod, the first rotating rod is provided with a transverse rod, the utility model discloses the waste gas treatment conveying device can conveniently drive the first filter plate to shake, avoid the impurities adhered to the bottom of the first filter plate, and avoid the blockage phenomenon after long-time use, the first filter plate is favorable for filtering.
Description
Technical Field
The utility model relates to a waste gas treatment equipment technical field especially relates to an exhaust-gas treatment conveying equipment for environmental protection equipment.
Background
The waste gas that the mill produced generally contains more impurity and harmful gas, and direct emission causes very big pollution to the environment, needs to use environmental protection equipment exhaust-gas treatment conveyor to in handling waste gas.
Present environmental protection equipment exhaust-gas treatment conveyor, mainly adopt soluble harmful gas and dust in the circulating water filtration waste gas, rethread filtration equipment filters, but the impurity that current filtration equipment bottom bonded easily appears blocking phenomenon after using for a long time easily, and simultaneously, the inner wall of major structure can bond a large amount of dirt, needs the manual work to clear up.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem that solve provides an exhaust-gas treatment conveying equipment for environmental protection equipment, has solved the impurity that current filtration equipment bottom bonded easily, appears blocking phenomenon easily after using for a long time, and simultaneously, major structure's inner wall can bond a large amount of dirt, needs the manual work to clear up the problem.
In order to solve the technical problem, the utility model provides a waste gas treatment conveying device for environmental protection equipment, which comprises a box body and a box cover, wherein the top of the box body is fixedly connected with the box cover for exhausting through bolts, the left side wall and the right side wall of the box body are fixedly connected with a supporting plate, the top of the supporting plate is respectively and fixedly provided with a driving motor and a reflux pump, the output end of the driving motor is fixedly connected with a fourth bevel gear, the output end of the reflux pump is fixedly connected with a reflux pipe, the reflux pipe is fixedly connected with the upper end of the box body, the box body is fixedly connected with an air inlet pipe above the driving motor, the left end of the air inlet pipe is in threaded connection with a threaded sleeve, the threaded sleeve is fixedly connected with a connecting pipe connected with an air source, the right end of the inner wall of the, the left end of the second spring is fixedly connected with a second filter plate which is in fit sliding connection with the inner wall of the connecting pipe, the right side wall of the second filter plate is uniformly and fixedly connected with a second hemispherical block, the right end of the air inlet pipe is rotatably connected with a rotating shaft through a bearing which is fixedly connected, the left end of the rotating shaft is fixedly connected with a third bevel gear which is matched with a fourth bevel gear for use, the left end of the L-shaped push plate of the rotating shaft is uniformly and fixedly connected with a fan blade which is used for driving air to flow along the circumferential direction, the left end of the fan blade of the rotating shaft is fixedly connected with an L-shaped push plate which is matched with the second hemispherical block for use, the right end of the rotating shaft is fixedly connected with a second bevel gear, a first connecting plate is fixedly connected above the second bevel gear of the box body, the first connecting plate is rotatably connected with a first rotating rod through a bearing which is fixedly connected, and the bottom of the first rotating rod is fixedly connected with a first bevel gear which is meshed with the second bevel gear, the utility model discloses a filter box, including first connecting plate, first rotation pole, the top fixedly connected with push pedal of first connecting plate, the first supporting ring of fixedly connected with is located to the below fixedly connected with horizontal pole of first connecting plate, the outer end fixedly connected with of horizontal pole and box inner wall laminating sliding connection's scraper blade, the top fixedly connected with push pedal of first rotation pole, the box is the first supporting ring of fixedly connected with in the top of first connecting plate, the even first spring of fixedly connected with in top of first supporting ring, the first filter plate of top fixedly connected with of first spring, and first filter plate setting is at the upper end the play liquid end of back flow, the even fixedly connected with in bottom of first filter plate is with the first hemisphere piece that the push pedal cooperation was used.
Furthermore, the inner end of the return pipe is fixedly connected with an annular spray pipe used for improving the spraying effect.
Furthermore, the air inlet pipe is rotatably connected with the output end of the driving motor through a bearing fixedly connected with the air inlet pipe.
Furthermore, a second sliding rod is uniformly and fixedly connected to the right side wall of the second filter plate, and the right end of the second sliding rod penetrates through a second spring and is in fit sliding connection with a second support ring.
Furthermore, the bottom of the straight hole formed in the connecting pipe is fixedly connected with an ash receiving hopper, the ash receiving hopper is connected with a baffle plate in a sliding mode through a transverse hole in an attaching mode, and the left end of the second filter plate is flush with the right end of the ash receiving hopper when the L-shaped push plate is in direct contact with the right end of the second hemispherical block.
Furthermore, the bottom of the first filter plate is uniformly and fixedly connected with a first sliding rod, and the bottom of the first sliding rod penetrates through a first spring and is connected with the cross rod in an inserting mode.
Has the advantages that:
the utility model discloses a dust carries out maximize filtration processing in will abandoning the second filter plate of connecting pipe, reduces the dust volume of box, alleviates the filter pressure of first filter plate. The utility model drives the fourth bevel gear to rotate through the driving motor, the fourth bevel gear drives the rotating shaft to rotate, the rotating shaft drives the third bevel gear to rotate, the third bevel gear drives the waste gas to flow, the rotating shaft drives the L-shaped push plate to rotate, the L-shaped push plate is periodically contacted with the second hemispherical block, the second filter plate is periodically pushed to move left through the second hemispherical block, then the second spring drives the second filter plate to move right, so as to drive the second filter plate to shake, avoid dust from being adhered to the second filter plate, ensure the filtering performance of the second filter plate, meanwhile, the rotating shaft drives the second bevel gear to rotate, the second bevel gear drives the first bevel gear to rotate, the first bevel gear drives the first rotating rod to rotate, the first rotating rod drives the push plate to rotate, the push plate periodically pushes the first hemispherical block to move upwards, the first hemispherical block periodically pushes the first filter plate to move upwards, the first spring drives the first filter plate to move downwards, conveniently drive the shake of first filter plate, avoid the impurity that first filter plate bottom bonds, the jam appears after avoiding long-time the use, do benefit to first filter plate and filter, in addition, first rotation pole drives the horizontal pole and rotates, and the horizontal pole drives the scraper blade and rotates, and the scraper blade rotates on the box inner wall, and the scraper blade is scraped the dirt that the box inner wall bonded clearly, need not the manual work and clears up, and whole device operation can realize through a set of driving motor, has reduced production and use cost.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a bottom view of the structure of the present invention;
FIG. 3 is a sectional view of the structure of the present invention;
FIG. 4 is a schematic view of the intake tube and its connection structure of the present invention;
labeled as: 1. the novel filter plate comprises a box body 2, an air inlet pipe 3, a threaded sleeve 4, a connecting pipe 5, an ash receiving hopper 6, a driving motor 7, a supporting plate 8, a box cover 9, a return pipe 10, a return pump 11, an outlet pipe 12, an annular spray pipe 13, a first half ball block 14, a first filter plate 15, a push plate 16, a first spring 17, a first connecting plate 18, a cross rod 19, a scraper 20, a first slide rod 21, a first rotating rod 22, a first bevel gear 23, a second bevel gear 24, a first supporting ring 25, a second connecting plate 26, a third bevel gear 27, a fan blade 28, a second filter plate 29, a fourth bevel gear 30, a second spring 31, a second half ball block 32, a baffle 33, a second supporting ring 34, a second slide rod 35, an L-shaped push plate 36 and a rotating shaft.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
As shown in fig. 1-4, a waste gas treatment conveying device for an environmental protection device comprises a box body 1 and a box cover 8, the top of the box body 1 is fixedly connected with the box cover 8 for exhausting through bolts, the left and right side walls of the box body 1 are fixedly connected with a supporting plate 7, the top of the supporting plate 7 is respectively and fixedly provided with a driving motor 6 and a reflux pump 10, the output end of the driving motor 6 is fixedly connected with a fourth bevel gear 29, an air inlet pipe 2 is rotatably connected with the output end of the driving motor 6 through a bearing which is fixedly connected, the output end of the reflux pump 10 is fixedly connected with a reflux pipe 9, the reflux pump 10 is connected with an external water source through a pipeline, the inner end of the reflux pipe 9 is fixedly connected with an annular spray pipe 12 for improving the spraying effect, the spraying effect is good, and the absorption is facilitated;
the return pipe 9 is fixedly connected with the upper end of the box body 1, the box body 1 is fixedly connected with the air inlet pipe 2 above the driving motor 6, the left end of the air inlet pipe 2 is in threaded connection with the threaded sleeve 3, the threaded sleeve 3 is fixedly connected with the connecting pipe 4 connected with an air source, the connecting pipe 4 is convenient to install, the second filter plate 28 is convenient to clean, the right end of the inner wall of the connecting pipe 4 is fixedly connected with the second support ring 33, the left end of the second support ring 33 is uniformly and fixedly connected with the second spring 30, the left end of the second spring 30 is fixedly connected with the second filter plate 28 which is in fit sliding connection with the inner wall of the connecting pipe 4, the second filter plate 28 of the connecting pipe 4 carries out maximum filtration treatment on waste dust, the dust amount of the box body 1 is reduced, and the filtration pressure of the first filter plate 14 is reduced;
the right side wall of the second filter plate 28 is uniformly and fixedly connected with a second slide bar 34, the right end of the second slide bar 34 penetrates through a second spring 30 to be in fit sliding connection with a second support ring 33, the right side wall of the second filter plate 28 is uniformly and fixedly connected with a second hemispherical block 31, the right end of the air inlet pipe 2 is rotatably connected with a rotating shaft 36 through a fixedly connected bearing, the left end of the rotating shaft 36 is fixedly connected with a third bevel gear 26 matched with a fourth bevel gear 29 for use, the rotating shaft 36 is uniformly and fixedly connected with a fan blade 27 used for driving air to flow at the left end of the L-shaped push plate 35 along the circumferential direction, the left end of the rotating shaft 36 at the left end of the fan blade 27 is fixedly connected with an L-shaped push plate 35 matched with the second hemispherical block 31 for use, the bottom of a straight hole formed in the connecting pipe 4 is fixedly connected with an ash receiving hopper 5, the ash receiving hopper 5 is in fit sliding connection with a baffle 32 through a transverse hole, when the L-shaped push plate 35 is in positive contact with the right end of the second hemispherical block 31, the right end of the rotating shaft 36 is fixedly connected with a second bevel gear 23, a first connecting plate 17 is fixedly connected to the box body 1 above the second bevel gear 23, the first connecting plate 17 is rotatably connected with a first rotating rod 21 through a bearing fixedly connected with the first rotating rod, the bottom of the first rotating rod 21 is fixedly connected with a first bevel gear 22 engaged with the second bevel gear 23, the first rotating rod 21 is fixedly connected with a cross rod 18 below the first connecting plate 17, the outer end of the cross rod 18 is fixedly connected with a scraper 19 jointed with the inner wall of the box body 1 in a sliding manner, the top of the first rotating rod 21 is fixedly connected with a push plate 15, a first supporting ring 24 is fixedly connected to the box body 1 above the first connecting plate 17, the top of the first supporting ring 24 is uniformly and fixedly connected with a first spring 16, the top of the first spring 16 is fixedly connected with a first filter plate 14, and the first filter plate 14 is arranged at the liquid outlet end of the upper end return pipe 9, the bottom of the first filter plate 14 is uniformly and fixedly connected with a first hemispherical block 13 matched with the push plate 15 for use, the bottom of the first filter plate 14 is uniformly and fixedly connected with a first slide rod 20, the bottom of the first slide rod 20 penetrates through a first spring 16 to be inserted into a cross rod 18, a driving motor 6 drives a fourth bevel gear 29 to rotate, the fourth bevel gear 29 drives a rotating shaft 36 to rotate, the rotating shaft 36 drives a third bevel gear 26 to rotate, the third bevel gear 26 drives waste gas to flow, the rotating shaft 36 drives an L-shaped push plate 35 to rotate, the L-shaped push plate 35 is periodically contacted with a second hemispherical block 31, the second filter plate 28 is periodically pushed to move leftwards through the second hemispherical block 31, then the second spring 30 drives the second filter plate 28 to move rightwards, the second filter plate 28 is conveniently driven to shake, dust is prevented from being adhered to the second filter plate 28, the filtering performance of the second filter plate 28 is ensured, and meanwhile, the rotating shaft 36 drives a second bevel gear 23 to rotate, the second bevel gear 23 drives the first bevel gear 22 to rotate, the first bevel gear 22 drives the first rotating rod 21 to rotate, the first rotating rod 21 drives the push plate 15 to rotate, the push plate 15 periodically pushes the first hemispherical block 13 to move upwards, the first hemispherical block 13 periodically pushes the first filter plate 14 to move upwards, the first spring 16 drives the first filter plate 14 to move downwards, the first filter plate 14 is conveniently driven to shake, impurities adhered to the bottom of the first filter plate 14 are avoided, blocking phenomena after long-time use are avoided, the first filter plate 14 is beneficial to filtering, in addition, the first rotating rod 21 drives the transverse rod 18 to rotate, the transverse rod 18 drives the scraper 19 to rotate, the scraper 19 rotates on the inner wall of the box body 1, the scraper 19 clearly scrapes dirt adhered to the inner wall of the box body 1, manual cleaning is not needed, the whole device can be operated through the group of driving motors 6, and production and use costs are reduced.
When the dust remover is used, waste gas enters the connecting pipe 4, the second filter plate 28 of the connecting pipe 4 carries out maximum filtration treatment on waste dust, the dust amount of the box body 1 is reduced, the filtration pressure of the first filter plate 14 is reduced, the reflux pump 10 pumps water into the box body 19 and then sprays the water out of the annular spray pipe 12, the water sprays the water to absorb dust and toxic gas, the driving motor 6 is started, the driving motor 6 drives the fourth bevel gear 29 to rotate, the fourth bevel gear 29 drives the rotating shaft 36 to rotate, the rotating shaft 36 drives the third bevel gear 26 to rotate, the third bevel gear 26 drives the waste gas to flow, the rotating shaft 36 drives the L-shaped push plate 35 to rotate, the L-shaped push plate 35 periodically contacts with the second hemispherical block 31, the second filter plate 28 is periodically pushed to move leftwards through the second hemispherical block 31, then the second spring 30 drives the second filter plate 28, the second filter plate 28 is conveniently driven to shake, and dust is prevented from being adhered to the second filter plate 28, the filtering performance of the second filter plate 28 is ensured, meanwhile, the rotating shaft 36 drives the second bevel gear 23 to rotate, the second bevel gear 23 drives the first bevel gear 22 to rotate, the first bevel gear 22 drives the first rotating rod 21 to rotate, the first rotating rod 21 drives the push plate 15 to rotate, the push plate 15 periodically pushes the first hemispherical block 13 to move upwards, the first hemispherical block 13 periodically pushes the first filter plate 14 to move upwards, the first spring 16 drives the first filter plate 14 to move downwards, the first filter plate 14 is conveniently driven to shake, impurities adhered to the bottom of the first filter plate 14 are avoided, the phenomenon of blockage after long-time use is avoided, the first filter plate 14 is beneficial to filtering, in addition, the first rotating rod 21 drives the cross rod 18 to rotate, the cross rod 18 drives the scraper 19 to rotate, the scraper 19 rotates on the inner wall of the box body 1, the scraper 19 clearly scrapes dirt adhered to the inner wall of the box body 1, and manual cleaning is not needed, the whole device can be operated by a group of driving motors 6, so that the production and use cost is reduced.
The electrical components appearing in the application are all electrically connected with an external main controller and 220V mains supply, and the main controller can be a computer or other conventional known devices for playing a role in control.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and those skilled in the art can make many variations and modifications of the technical solution of the present invention without departing from the scope of the technical solution of the present invention.
Claims (6)
1. The utility model provides an exhaust-gas treatment conveying equipment for environmental protection equipment, includes box and case lid, and the top of box is used for carminative case lid, its characterized in that through bolt fixedly connected with: the left side wall and the right side wall of the box body are fixedly connected with a supporting plate, the top of the supporting plate is respectively fixedly provided with a driving motor and a reflux pump, the output end of the driving motor is fixedly connected with a fourth bevel gear, the output end of the reflux pump is fixedly connected with a reflux pipe, the reflux pipe is fixedly connected with the upper end of the box body, the box body is fixedly connected with an air inlet pipe above the driving motor, the left end of the air inlet pipe is in threaded connection with a threaded sleeve, the threaded sleeve is fixedly connected with a connecting pipe connected with an air source, the right end of the inner wall of the connecting pipe is fixedly connected with a second supporting ring, the left end of the second supporting ring is uniformly and fixedly connected with a second spring, the left end of the second spring is fixedly connected with a second filter plate which is in laminating and sliding connection with the inner wall of the connecting pipe, the right side wall of, the left end of the rotating shaft is fixedly connected with a third bevel gear matched with a fourth bevel gear, the left end of the L-shaped push plate of the rotating shaft is uniformly and fixedly connected with a fan blade used for driving air to flow along the circumferential direction, the left end of the fan blade of the rotating shaft is fixedly connected with an L-shaped push plate matched with a second hemispherical block, the right end of the rotating shaft is fixedly connected with a second bevel gear, a first connecting plate is fixedly connected to the upper part of the second bevel gear of the box body, the first connecting plate is rotatably connected with a first rotating rod through a fixedly connected bearing, the bottom of the first rotating rod is fixedly connected with a first bevel gear meshed with the second bevel gear, a cross rod is fixedly connected to the lower part of the first connecting plate, the outer end of the cross rod is fixedly connected with a scraper attached to the inner wall of the box body in a sliding connection, and the top of the first rotating rod is fixedly connected with the push plate, the box is in the first support ring of the top fixedly connected with of first connecting plate department, the even fixedly connected with first spring in top of first support ring, the first filter plate of top fixedly connected with of first spring, and first filter plate setting is in the upper end the play liquid end of back flow, the even fixedly connected with in bottom of first filter plate is with the first hemisphere piece that the push pedal cooperation was used.
2. The exhaust-gas treatment conveying apparatus for an environmental protection apparatus according to claim 1, wherein: the inner end of the return pipe is fixedly connected with an annular spray pipe used for improving the spraying effect.
3. The exhaust-gas treatment conveying apparatus for an environmental protection apparatus according to claim 1, wherein: the air inlet pipe is rotatably connected with the output end of the driving motor through a bearing fixedly connected with the air inlet pipe.
4. The exhaust-gas treatment conveying apparatus for an environmental protection apparatus according to claim 1, wherein: and the right side wall of the second filter plate is uniformly and fixedly connected with a second slide bar, and the right end of the second slide bar penetrates through a second spring and is in fit sliding connection with a second support ring.
5. The exhaust-gas treatment conveying apparatus for an environmental protection apparatus according to claim 4, wherein: the bottom of the straight hole formed by the connecting pipe is fixedly connected with an ash receiving hopper, the ash receiving hopper is connected with a baffle plate in a sliding mode through a transverse hole in an attached mode, and the left end of the second filter plate is flush with the right end of the ash receiving hopper when the L-shaped push plate is in direct contact with the right end of the second hemispherical block.
6. The exhaust-gas treatment conveying apparatus for an environmental protection apparatus according to claim 1, wherein: the bottom of the first filter plate is uniformly and fixedly connected with a first sliding rod, and the bottom of the first sliding rod penetrates through a first spring and is connected with the cross rod in an inserting mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022409099.4U CN213761002U (en) | 2020-10-27 | 2020-10-27 | Waste gas treatment conveying equipment for environmental protection equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022409099.4U CN213761002U (en) | 2020-10-27 | 2020-10-27 | Waste gas treatment conveying equipment for environmental protection equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213761002U true CN213761002U (en) | 2021-07-23 |
Family
ID=76911665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022409099.4U Expired - Fee Related CN213761002U (en) | 2020-10-27 | 2020-10-27 | Waste gas treatment conveying equipment for environmental protection equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213761002U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115569452A (en) * | 2022-11-30 | 2023-01-06 | 邸玉伟 | Waste gas treatment conveyor of environmental protection equipment |
-
2020
- 2020-10-27 CN CN202022409099.4U patent/CN213761002U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115569452A (en) * | 2022-11-30 | 2023-01-06 | 邸玉伟 | Waste gas treatment conveyor of environmental protection equipment |
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| 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 |