CN111963446A - Corrosion-resistant mortar pump - Google Patents
Corrosion-resistant mortar pump Download PDFInfo
- Publication number
- CN111963446A CN111963446A CN202010829670.XA CN202010829670A CN111963446A CN 111963446 A CN111963446 A CN 111963446A CN 202010829670 A CN202010829670 A CN 202010829670A CN 111963446 A CN111963446 A CN 111963446A
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- Prior art keywords
- pump
- ring
- main shaft
- sealing
- pad
- 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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
- F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/12—Shaft sealings using sealing-rings
- F04D29/122—Shaft sealings using sealing-rings especially adapted for elastic fluid pumps
- F04D29/124—Shaft sealings using sealing-rings especially adapted for elastic fluid pumps with special means for adducting cooling or sealing fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/12—Shaft sealings using sealing-rings
- F04D29/126—Shaft sealings using sealing-rings especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/20—Mounting rotors on shafts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
- F04D29/5846—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps cooling by injection
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/708—Suction grids; Strainers; Dust separation; Cleaning specially for liquid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a corrosion-resistant mortar pump in the field of mortar pumps, which comprises a device body, wherein the device body comprises a base, a motor and a pump body, the motor and the pump body are fixed at the top end of the base, the motor is arranged at one side of the pump body, the pump body comprises a pump shell and a locking nut, the locking nut is arranged in the middle of the pump shell, a main shaft is arranged in the middle of the pump shell, one side of the main shaft is arranged in the motor, the other side of the main shaft is arranged in a middle groove of the pump shell, the locking nut is arranged at one end, close to the pump shell, of the main shaft, the locking nut is arranged at the tail end of one side of the pump body of the main shaft, an anti-rotation nut is arranged at one side of the locking nut, a spring cushion is arranged at one side of the anti-rotation nut, a washer is arranged at one side of the, and the whole length of the pump is shortened, the space is saved, and the installation is facilitated.
Description
Technical Field
The invention relates to the field of mortar pumps, in particular to a corrosion-resistant mortar pump.
Background
The mortar pump is a pump for pumping materials such as slurry, tailing mortar, sewage, concentrated liquid and the like, can be suitable for various working conditions, and is mainly used in the fields of novel building materials, mines, chemical industry, electric power, petrifaction, food, coal mines, environmental protection and the like.
At present, the mortar pump is suitable for various working conditions, such as conveying acid, alkaline clear liquid or slurry, various corrosive ore pulps in the metallurgical industry and various sewage in the environmental protection industry. Not only is strong corrosion resistance required for the mortar pump, but also good sealing properties are required. The original mortar pump is to have certain effect to the corruption of solving the pump body at metal pump body inner liner plastics anticorrosive coating (lining plastics anticorrosive coating on the terminal surface of the pump cover, impeller, pump shaft surface promptly in the pump body with the medium contact), but, has a lot of weak points, for example: the adhesion between the inner liner layer plastic, the anticorrosive coating and the pump body is poor, and after the pump is used for a period of time, the anticorrosive coating begins to produce the local shedding phenomenon, thereby reducing the service life of the mortar pump. In addition, in the existing mortar pump with the lining anti-corrosion layer, the pump shaft anti-corrosion layer and the shaft seal are easily abraded due to the motion friction between the pump body and the pump shaft, so that the pump body is not tightly sealed. The wear of the impeller of the mortar pump is also very severe, especially when there are a lot of solid particles in the transported medium.
Disclosure of Invention
The invention aims to provide a corrosion-resistant mortar pump to solve the problem of poor wear resistance in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the corrosion-resistant mortar pump comprises a device body, wherein the device body comprises a base, a motor and a pump body, the motor and the pump body are fixed at the top end of the base, the motor is arranged on one side of the pump body, the pump body comprises a pump shell and a locking nut, the locking nut is arranged in the middle of the pump shell, a main shaft is arranged in the middle of the pump shell, one side of the main shaft is arranged in the motor, the other side of the main shaft is arranged in a groove in the middle of the pump shell, one end, close to the pump shell, of the main shaft is provided with the locking nut, one side of the locking nut is provided with an anti-rotation nut, one side of the anti-rotation nut is provided with a spring pad, one side of the spring pad is provided with a washer, one side of the washer is provided with a cap splicing pad, the main shaft is fixedly sleeved, the middle part of the main shaft is wrapped with a sealing box, the top end of the sealing box is provided with a sealing retainer ring, one side of the sealing retainer ring is provided with a sealing box gasket, the right side of the impeller pad is provided with a shaft sleeve, the right side of the shaft sleeve is provided with a sealing ring, the top of the sealing ring is provided with a sealing ring top ring, the sealing ring top ring is sleeved with a sealing box gland, one side of the sealing box gland is provided with a cooling water nozzle, a water seal ring is arranged on one side of the cooling water nozzle, a cooling water ring is arranged on the top end of the cooling water nozzle, a shaft sleeve pad is arranged on one side of the shaft sleeve, a water retaining pad is arranged on the outer side of the sealing ring, a bearing is arranged in the middle of one side of the main shaft far away from the locking nut, one side of the bearing is fixed on the inner side surface of the pump shell through a bearing seat, a bearing oil seal is arranged on the bearing, and a bearing side cover is arranged on one side of the bearing.
As a further scheme of the invention: be provided with the annular structure on the main shaft of the front end of impeller, just the spring pad sets up in the annular structure, keeping away from lock nut of impeller is provided with the impeller pad, the spring pad can be used for reducing the vibration range of impeller, avoids rocking.
As a still further scheme of the invention: the cooling water ring is O-shaped, the cooling water ring is sleeved at the middle part of the cooling water nozzle, and the cooling water ring can be used for cooling the impeller and cleaning the impeller.
As a still further scheme of the invention: one side of the pump body, which is far away from the motor, is provided with a pump cover, the pump cover is connected with the pump body through threads, and a user can conveniently turn down the pump cover to clean, replace, disassemble and assemble the impeller and the main shaft.
As a still further scheme of the invention: the left side of preventing changeing the nut is provided with the pump lid pad, the pump lid pad can be fixed the position of lock nut to buffer external force.
As a still further scheme of the invention: the sealing washer is the K type, and evenly be provided with at least that there are three groups, right the rotation of main shaft reduces the vibration, guarantees transmission efficiency, avoids transmission wearing and tearing.
As a still further scheme of the invention: the four corners of base all is provided with predetermines the thread tightening foot, improves the structural stability when using, avoids rocking.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention has simple structure and reasonable design, avoids the power loss caused by using the coupler by using the connecting seat instead of using the coupler, can effectively reduce the vibration and the abrasion in the pump body when the mortar pump runs, shortens the whole length of the pump, saves the space and is beneficial to installation.
2. According to the invention, the k-shaped sealing ring is used, when the pump runs, the k-shaped sealing ring is loosened due to centrifugal force generated by rotation of the impeller and the impeller back blade, abrasion between the k-shaped sealing ring and the shaft sleeve is reduced, at the moment, the sealing cavity is in a negative pressure state, liquid leakage cannot occur, when the pump stops, the sealing cavity is changed from negative pressure to positive pressure, the k-shaped sealing ring wraps the shaft sleeve under the pressure effect to play a sealing effect, and the k-shaped sealing ring shield can block impact of slurry at the moment of stopping, so that the k-shape of the sealing ring is protected.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic sectional view of the pump body according to the present invention.
In the figure: 1. a device body; 2. a base; 3. a motor; 4. a pump body; 5. a pump cover; 6. locking the nut; 7. a pump cap pad; 8. an anti-rotation nut; 9. a spring pad; 10. washer; 11. splicing a cap pad; 12. an impeller; 13. a pump housing; 14. an impeller pad; 15. sealing the box gasket; 16. a sealing retainer ring; 17. a sealing box; 18. a shaft sleeve; 19. a seal ring; 20. a water seal ring; 21. cooling the water nozzle; 22. cooling the water ring; 23. a sealing ring top ring; 24. a gland of the sealing box; 25. a shaft sleeve pad; 26. a water-retaining cushion; 27. a bearing side cover; 28. bearing oil seal; 29. a bearing; 30. a bearing seat; 31. a main shaft.
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. 1-2, in the embodiment of the invention, the corrosion-resistant mortar pump comprises a device body 1, the device body 1 comprises a base 2, a motor 3 and a pump body 4, the motor 3 and the pump body 4 are both fixed at the top end of the base 2, the motor 3 is arranged at one side of the pump body 4, the pump body 4 comprises a pump shell 13 and a locking nut 6, the locking nut 6 is arranged at the middle part of the pump shell 13, a main shaft 31 is arranged at the middle part of the pump shell 13, one side of the main shaft 31 is arranged in the motor 3, the other side of the main shaft 31 is arranged in a middle groove of the pump shell 13, one end of the main shaft 31 close to the pump shell 13 is provided with the locking nut 6, one side of the locking nut 6 is provided with an anti-rotation nut 8, one side of the anti-rotation nut 8 is provided with a spring pad 9, one side of the spring, an impeller 12 is fixedly sleeved on a main shaft 31, an impeller pad 14 is arranged on one side of the impeller 12, a sealing box 17 is wrapped in the middle of the main shaft 31, a sealing check ring 16 is arranged at the top end of the sealing box 17, a sealing box pad 15 is arranged on one side of the sealing check ring 16, a shaft sleeve 18 is arranged on the right side of the impeller pad 14, a sealing ring 19 is arranged on the right side of the shaft sleeve 18, a sealing ring top ring 23 is arranged at the top of the sealing ring 19, a sealing box gland 24 is sleeved on the sealing ring top ring 23, a cooling water nozzle 21 is arranged on one side of the sealing box gland 24, a water seal ring 20 is arranged on one side of the cooling water nozzle 21, a cooling water ring 22 is arranged at the top end of the cooling water nozzle 21, a shaft sleeve pad 25 is arranged on one side of the shaft sleeve 18, a water blocking pad 26 is arranged on the outer side, the bearing 29 is provided with a bearing oil seal 28, and one side of the bearing 29 is provided with a bearing side cover 27.
Wherein, a main shaft 31 at the front end of the impeller 12 is provided with a ring groove structure, the spring pad 9 is arranged in the ring groove structure, and the impeller 12 is provided with an impeller pad 14 far away from the lock nut 6; the cooling water ring 22 is O-shaped, and the cooling water ring 22 is sleeved in the middle of the cooling water nozzle 21; a pump cover 5 is arranged on one side of the pump body 4, which is far away from the motor 3, and the pump cover 5 is connected with the pump body 4 through threads; the left side of the anti-rotation nut 8 is provided with a pump cover gasket 7; the sealing rings 19 are K-shaped, and at least three groups are uniformly arranged; the four corners of the base 2 are provided with preset thread fixing feet.
The working principle of the invention is as follows: when the invention is used, when the main shaft 31 drives the impeller 12 to rotate, the sealing ring 19 is loosened due to the centrifugal force generated by the rotation of the impeller 7, the abrasion between the sealing ring and the shaft sleeve 9 is reduced, the effect of reducing the abrasion is achieved, at the moment, the sealing cavity is in a negative pressure state, liquid leakage cannot occur, when the electric pump is stopped, the sealing cavity is converted from negative pressure to positive pressure, the sealing ring 19 wraps the shaft sleeve 18 under the pressure effect to play a sealing effect, and meanwhile, the sealing ring top ring 23 and the impeller pad 14 can block the impact of slurry at the moment of stopping to protect the sealing ring 19.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. The utility model provides a corrosion resistant mortar pump, includes device body (1), device body (1) includes base (2), motor (3) and pump body (4), the top of base (2) is all fixed in motor (3) and pump body (4), motor (3) set up in one side of the pump body (4), its characterized in that: the pump comprises a pump shell (13) and a locking nut (6) in a pump body (4), wherein the locking nut (6) is arranged in the middle of the pump shell (13), a main shaft (31) is arranged in the middle of the pump shell (13), one side of the main shaft (31) is arranged in a motor (3), the other side of the main shaft is arranged in a middle groove of the pump shell (13), the locking nut (6) is arranged at one end, close to the pump shell (13), of the main shaft (31), the locking nut (6) is arranged at the tail end of one side of the pump body (4) of the main shaft (31), an anti-rotation nut (8) is arranged at one side of the locking nut (6), a spring pad (9) is arranged at one side of the anti-rotation nut (8), a washer (10) is arranged at one side of the spring pad (9), a washer pad (11) is arranged at one side of the washer (, one side of the impeller (12) is provided with an impeller pad (14), the middle of the main shaft (31) is wrapped with a sealing box (17), the top end of the sealing box (17) is provided with a sealing check ring (16), one side of the sealing check ring (16) is provided with a sealing box pad (15), the right side of the impeller pad (14) is provided with a shaft sleeve (18), the right side of the shaft sleeve (18) is provided with a sealing ring (19), the top of the sealing ring (19) is provided with a sealing ring top ring (23), the sealing ring top ring (23) is sleeved with a sealing box gland (24), one side of the sealing box gland (24) is provided with a cooling water nozzle (21), one side of the cooling water nozzle (21) is provided with a water seal ring (20), the top end of the cooling water nozzle (21) is provided with a cooling water ring (22), one side of the shaft sleeve (18), the outer side of the sealing ring (19) is provided with a water retaining cushion (26), the middle of one side, away from the locking nut (6), of the main shaft (31) is provided with a bearing (29), one side of the bearing (29) is fixed on the inner side surface of the pump shell (13) through a bearing seat (30), a bearing oil seal (28) is arranged on the bearing (29), and a bearing side cover (27) is arranged on one side of the bearing (29).
2. A corrosive resistant mortar pump as set forth in claim 1, wherein: be provided with the annular structure on main shaft (31) of the front end of impeller (12), just spring pad (9) set up in the annular structure, keeping away from lock nut (6) of impeller (12) is provided with impeller pad (14).
3. A corrosive resistant mortar pump as set forth in claim 1, wherein: the cooling water ring (22) is O-shaped, and the cooling water ring (22) is sleeved in the middle of the cooling water nozzle (21).
4. A corrosive resistant mortar pump as set forth in claim 1, wherein: one side of the pump body (4) far away from the motor (3) is provided with a pump cover (5), and the pump cover (5) is connected with the pump body (4) through threads.
5. A corrosive resistant mortar pump as set forth in claim 1, wherein: and a pump cover pad (7) is arranged on the left side of the anti-rotating nut (8).
6. A corrosive resistant mortar pump as set forth in claim 1, wherein: the sealing ring (19) is K-shaped and is at least evenly provided with three groups.
7. A corrosive resistant mortar pump as set forth in claim 1, wherein: the four corners of the base (2) are provided with preset thread fixing feet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010829670.XA CN111963446A (en) | 2020-08-18 | 2020-08-18 | Corrosion-resistant mortar pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010829670.XA CN111963446A (en) | 2020-08-18 | 2020-08-18 | Corrosion-resistant mortar pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111963446A true CN111963446A (en) | 2020-11-20 |
Family
ID=73387745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010829670.XA Withdrawn CN111963446A (en) | 2020-08-18 | 2020-08-18 | Corrosion-resistant mortar pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111963446A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104948469A (en) * | 2015-07-07 | 2015-09-30 | 芜湖环球汽车配件有限公司 | Wear resistant corrosion resisting centrifugal pump |
| CN204738970U (en) * | 2015-05-20 | 2015-11-04 | 苏州沃达园林机械有限公司 | Vane pump with corrosion resistant wear resistance |
| CN204921382U (en) * | 2015-07-07 | 2015-12-30 | 芜湖环球汽车配件有限公司 | Wear -resisting corrosion resisting centrifugal pump |
| CN106884800A (en) * | 2017-04-15 | 2017-06-23 | 阮秀梅 | One kind can pre- anticlogging mortar pump |
| CN109026725A (en) * | 2018-07-17 | 2018-12-18 | 安徽南方化工泵业有限公司 | A kind of novel wear resistant corrosion-resistant chemical centrifugal pump |
| CN208518903U (en) * | 2018-05-11 | 2019-02-19 | 江苏旺源泵阀制造有限公司 | Anticorrosive anti-wear mortar pump |
| CN208702709U (en) * | 2018-06-04 | 2019-04-05 | 汕头市东兴糖机制泵有限公司 | A kind of anticorrosive anti-wear mortar pump |
-
2020
- 2020-08-18 CN CN202010829670.XA patent/CN111963446A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204738970U (en) * | 2015-05-20 | 2015-11-04 | 苏州沃达园林机械有限公司 | Vane pump with corrosion resistant wear resistance |
| CN104948469A (en) * | 2015-07-07 | 2015-09-30 | 芜湖环球汽车配件有限公司 | Wear resistant corrosion resisting centrifugal pump |
| CN204921382U (en) * | 2015-07-07 | 2015-12-30 | 芜湖环球汽车配件有限公司 | Wear -resisting corrosion resisting centrifugal pump |
| CN106884800A (en) * | 2017-04-15 | 2017-06-23 | 阮秀梅 | One kind can pre- anticlogging mortar pump |
| CN208518903U (en) * | 2018-05-11 | 2019-02-19 | 江苏旺源泵阀制造有限公司 | Anticorrosive anti-wear mortar pump |
| CN208702709U (en) * | 2018-06-04 | 2019-04-05 | 汕头市东兴糖机制泵有限公司 | A kind of anticorrosive anti-wear mortar pump |
| CN109026725A (en) * | 2018-07-17 | 2018-12-18 | 安徽南方化工泵业有限公司 | A kind of novel wear resistant corrosion-resistant chemical centrifugal pump |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20201120 |