Beer barrel walking type cleaning and double-end filling all-in-one machine
By designing a beer barrel walk-by-step cleaning and double-head filling machine, the problem of requiring two equipment before filling of beer barrels in the existing technology is solved, and the automatic cleaning and filling of beer barrels is realized, which improves efficiency and reduces cost.
Patent Information
- Application Number
- CN202421298553.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-07
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-06-07
AI Technical Summary
The existing beer barrels require two equipment to be cleaned and filled before filling, resulting in frequent handling by workers, increasing labor intensity and investment costs.
A beer barrel walk-by-step cleaning double-head filling machine is designed. By inverting the beer barrel on the filter plate, the interior of the beer barrel is cleaned by using a high-pressure water pump water jet pipe, and the clamping plate and lifting plate are realized. Automatic cleaning and filling of beer barrels.
The automated cleaning and filling of beer barrels has been realized, which reduces workers' labor, improves work efficiency, and reduces investment costs.
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Figure CN222498671U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of beer production, in particular to a beer barrel step-by-step cleaning and double-head filling integrated machine. Background Art
[0002] Beer is mainly made of wheat malt and barley malt as the main raw materials, with hops added, and is brewed through liquid gelatinization and saccharification, and then liquid fermentation. Beer is widely loved by people, so in the production process of beer, in order to facilitate the storage and transportation of beer, beer is usually filled into beer barrels.
[0003] In order to solve the problem that the existing beer barrels need to be cleaned and sterilized before filling, and then filling, the brewery needs two devices when filling beer barrels; the existing beer barrels need to be cleaned and sterilized before filling, and then filling, so the brewery needs two devices when filling beer barrels, namely a cleaning device and a filling device. In this way, when filling, the workers need to place the beer barrels on the cleaning device for cleaning, and then move them to the filling device for filling. The back and forth transportation is bound to increase the labor intensity, and the work efficiency is also low, and the investment cost is also high. To this end, the utility model proposes a beer barrel step-moving cleaning double-head filling integrated machine to solve the above problems. Utility Model Content
[0004] The purpose of the utility model is to provide a beer barrel step-type cleaning double-head filling integrated machine to solve the problems raised in the above-mentioned background technology.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a beer barrel step-type cleaning double-head filling integrated machine, comprising: a bottom plate, a fixed frame, a filling component and a water collecting box, the fixed frame is U-shaped and fixedly installed on the upper end of the bottom plate, the filling component is fixedly installed on the upper end of the fixed frame, and the upper end front and rear sides of the bottom plate are fixedly installed with support frames, the support frames are U-shaped, a sliding rod is fixedly installed on the inner side of the upper end of one of the support frames, and a threaded rod is rotatably connected to the inner side of the upper end of the other support frame;
[0006] A movable plate is movably connected between the threaded rod and the sliding rod, and a clamping component is installed at the lower end of the movable plate;
[0007] The water collecting box is located on one side of the bottom plate, a water spray pipe is installed in the water collecting box, a filter plate is elastically connected to the upper end of the water collecting box, a circular hole is opened at the center of the filter plate, and the upper end of the water spray pipe is located in the circular hole.
[0008] Preferably, a servo motor is fixedly mounted on the side wall of the other support frame, the left and right ends of the threaded rod are rotatably connected to the inner walls of the left and right ends of the support frame, and one end of the threaded rod passes through the side wall of the support frame and is fixedly connected to the output end of the servo motor.
[0009] Preferably, a sliding sleeve is fixedly installed at one end of the movable plate, and a threaded sleeve is fixedly installed at the other end, the inner wall of the sliding sleeve and the outer wall of the sliding rod are slidably connected, the inner wall of the threaded sleeve and the outer wall of the threaded rod are threadedly connected, and guide holes are opened on the left and right side walls of the movable plate.
[0010] Preferably, the clamping component includes a mounting plate, a connecting plate, a clamping plate and a driving motor, the upper end of the mounting plate is fixedly mounted with an electric push rod 1 and a guide rod, the upper end of the electric push rod 1 is fixedly connected to the lower end of the movable plate, and the upper end of the guide rod slides through the guide hole.
[0011] Preferably, there are two connecting plates in an L shape, one end of the two connecting plates are respectively fixedly mounted on the left and right sides of the lower end of the mounting plate, the other ends of the two connecting plates are rotatably connected to a rotating shaft through a bearing, a rotating plate is fixedly mounted on one end of the rotating shaft, an electric push rod 2 is fixedly mounted on the side wall of the other end of the rotating plate, a slider is fixedly mounted on the output end of the electric push rod 2, a fixing hole is provided on the upper end of the slider, a driving motor is fixedly mounted on the other end of one of the connecting plates, and the output end of the driving motor is fixedly connected to the other end of one of the rotating shafts through a coupling.
[0012] Preferably, the clamping plate is arc-shaped, and two clamping plates are provided. A fixing block is fixedly installed at the rear end of each clamping plate. A connecting groove is provided at one end of the fixing block. The upper end of the fixing block is slidably connected to a limiting pin. A spring 1 is sleeved on the outer wall of the limiting pin. One end of the spring 1 is fixedly connected to the upper outer wall of the fixing block, and the other end is fixedly connected to the other end of the limiting pin. The slider is slidably inserted into the connecting groove, and the limiting pin is inserted into the fixing hole under the action of the spring 1.
[0013] Preferably, a drain pipe is fixedly installed on one side of the lower end of the water collecting box, and a water inlet pipe is fixedly installed on the side wall of the other end, the water inlet pipe is connected to the lower end of the water spray pipe, and spring 2 is fixedly installed on the four sides of the inner end of the water collecting box, the upper end of spring 2 is fixedly connected to the lower end of the filter plate, the outer wall of the filter plate is slidably connected to the inner wall of the water collecting box, and water retaining plates are fixedly installed on the four sides of the upper end of the filter plate.
[0014] Preferably, a protective plate is provided at the lower end of the base plate, the protective plate is U-shaped, both sides of the upper end of the protective plate are fixedly installed on the lower end of the base plate, an electric push rod three is fixedly installed at the center of the inner end of the protective plate, and the output end of the electric push rod three passes through the side wall of the base plate and is connected to the lifting plate.
[0015] Preferably, telescopic rods are fixedly mounted on four sides of the inner end of the protective plate, and the upper ends of the telescopic rods pass through the side walls of the bottom plate and are fixedly connected to four sides of the lower end of the lifting plate.
[0016] Compared with the prior art, the beneficial effects of the utility model are:
[0017] By placing the beer keg upside down on the upper end of the filter plate, the filter plate moves downward due to gravity through compression spring 2, and the water spray pipe extends out of the inner side of the beer keg. The inside of the beer keg can be cleaned by starting the high-pressure water pump. After cleaning, the clamping plate is driven to clamp the beer keg, and then it is turned 180 degrees, moved and placed on the upper end of the lifting plate, and then the electric push rod 3 drives the lifting plate and the beer keg to move upward and be located at the lower end of the beer outlet pipe of the filling component. Beer is filled into the beer keg through the filling component, which reduces the labor of workers and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a front view schematic diagram of the overall structure of the utility model;
[0019] Figure 2 It is a front view schematic diagram of part of the structure of the utility model;
[0020] Figure 3 This is a schematic diagram of the internal structure of the lifting plate of the utility model;
[0021] Figure 4 This is a schematic diagram of the lower end structure of the movable plate of the utility model;
[0022] Figure 5 This is a schematic diagram of the structure of the clamping plate of the utility model when it is installed;
[0023] Figure 6 This is a schematic diagram of the connection between the water collection box and the filter plate of the utility model
[0024] Figure 7 This is a schematic diagram of the water collecting box and filter plate of the utility model.
[0025] In the figure: 1. bottom plate; 2. support frame; 3. threaded rod; 4. sliding rod; 5. servo motor; 6. moving plate; 7. sliding sleeve; 8. threaded sleeve; 9. guide hole; 10. guide rod; 11. electric push rod one; 12. mounting plate; 13. connecting plate; 14. rotating shaft; 15. rotating plate; 16. electric push rod two; 17. clamping plate; 18. fixing block; 19. limiting pin; 20. spring one; 21. sliding block; 22. driving motor; 23. protective plate; 24. lifting plate; 25. electric push rod three; 26. telescopic rod; 27. fixing frame; 28. filling component; 29. water collecting box; 30. drain pipe; 31. water inlet pipe; 32. water spray pipe; 33. spring two; 34. filter plate; 35. round hole; 36. water retaining plate. DETAILED DESCRIPTION
[0026] In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0027] In the description of the present utility model, it should be noted that the terms "center", "middle", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "one", "first", "second", "third", "fourth", "fifth", "sixth" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0029] For the purpose of simplicity and illustration, the principles of the embodiments are mainly described by reference to examples. In the following description, many specific details are proposed to provide a thorough understanding of the embodiments. However, it is obvious that for those of ordinary skill in the art, these embodiments may not be limited to these specific details in practice. In some instances, known methods and structures are not described in detail to avoid making these embodiments unnecessarily difficult to understand. In addition, all embodiments can be used in combination with each other.
[0030] See also Figures 1 to 7The utility model provides a technical solution: a beer barrel step-by-step cleaning double-head filling machine, comprising: a bottom plate 1, a fixed frame 27, a filling component 28 and a water collecting box 29, the fixed frame 27 is U-shaped and fixedly installed on the upper end of the bottom plate 1, the filling component 28 is fixedly installed on the upper end of the fixed frame 27, the filling component 28 is supported on the upper end of the bottom plate 1, the filling component 28 belongs to the existing equipment, and no further description is given here. The filling component 28 can fill beer into the beer barrel, and the front and rear sides of the upper end of the bottom plate 1 are fixedly installed with support frames 2, the support frames 2 are U-shaped, and the two support frames 2 are located on the inner side of the fixed frame 27, the upper inner side of one of the support frames 2 is fixedly installed with a sliding rod 4, the upper inner side of the other support frame 2 is rotatably connected with a threaded rod 3, and the other support A servo motor 5 is fixedly installed on the side wall of the frame 2, and the left and right ends of the threaded rod 3 are rotatably connected to the inner walls of the left and right ends of the support frame 2, and one end of the threaded rod 3 passes through the side wall of the support frame 2 and is fixedly connected to the output end of the servo motor 5. When the servo motor 5 is started, it can drive the threaded rod 3 to rotate in the forward and reverse directions. A movable plate 6 is movably connected between the two support frames 2, and a sliding sleeve 7 is fixedly installed on one end of the movable plate 6, and a threaded sleeve 8 is fixedly installed on the other end. The inner wall of the sliding sleeve 7 is slidably connected to the outer wall of the sliding rod 4. When the servo motor 5 drives the threaded rod 3 to rotate, the threaded rod 3 drives the threaded sleeve 8 to move, and the inner wall of the threaded sleeve 8 is threadedly connected to the outer wall of the threaded rod 3. The sliding sleeve 7 slides on the outer wall of the sliding rod 4, thereby driving the movable plate 6 to move back and forth between the two support frames 2.
[0031] A clamping component is installed at the lower end of the movable plate 6, and guide holes 9 are opened on the left and right side walls of the movable plate 6. The clamping component includes a mounting plate 12, a connecting plate 13, a clamping plate 17 and a driving motor 22. An electric push rod 11 and a guide rod 10 are fixedly installed on the upper end of the mounting plate 12. The upper end of the electric push rod 11 is fixedly connected to the lower end of the movable plate 6, and the upper end of the guide rod 10 slides through the guide hole 9. When the electric push rod 11 is started, the mounting plate 12 can be driven to move up and down at the lower end of the movable plate 6. At the same time, the guide rod 10 slides in the guide hole 9 to guide and limit the mounting plate 12.
[0032] There are two connecting plates 13, and they are L-shaped. One end of the two connecting plates 13 is fixedly mounted on the left and right sides of the lower end of the mounting plate 12, respectively. The other ends of the two connecting plates 13 are rotatably connected to the rotating shaft 14 through bearings. The rotating shaft 14 can rotate on the connecting plate 13 through the bearing. A rotating plate 15 is fixedly mounted on one end of the rotating shaft 14, and an electric push rod 16 is fixedly mounted on the side wall of the other end of the rotating plate 15. A slider 21 is fixedly mounted on the output end of the electric push rod 16. A fixing hole (not shown in the figure) is opened at the upper end of the slider 21. The electric push rod 16 and the rotating plate 15 can be The following rotating shaft 14 rotates on one side of the connecting plate 13, and the connecting plate 13 is L-shaped. The clamping plate 17 can be extended to one side of the mounting plate 12 to facilitate clamping the beer barrel. The driving motor 22 is fixedly mounted on the other end of one of the connecting plates 13, and the output end of the driving motor 22 is fixedly connected to the other end of one of the rotating shafts 14 through a coupling. The driving motor 22 is a servo motor and can rotate forward and backward. When the driving motor 22 is started, it can drive the clamping plate 17 to rotate 180 degrees, and the beer barrel can be swapped up and down, which is convenient for cleaning the inside of the beer barrel.
[0033] The clamping plate 17 is in an arc shape. The clamping plate 17 is provided with two pieces. A fixing block 18 is fixedly installed at the rear end of each clamping plate 17. A connecting groove (not marked in the figure) is provided at one end of the fixing block 18. The upper end of the fixing block 18 is slidably connected to a limit pin 19. A spring 20 is sleeved on the outer wall of the limit pin 19. One end of the spring 20 is fixedly connected to the upper outer wall of the fixing block 18, and the other end is fixedly connected to the other end of the limit pin 19. The slider 21 is slidably inserted into the connecting groove. The limit pin 19 is in the spring 20. 20, then the spring 20 is in a balanced state, fixing the clamping plate 17 to one end of the electric push rod 2 16. When the electric push rod 2 16 is started, the clamping plate 17 can be driven to move inward to clamp the beer keg. When the clamping plate 17 needs to be replaced, it is only necessary to pull the limit pin 19 upward, and the limit pin 19 moves upward through the tension spring 20, thereby separating from the fixing hole, and the slider 21 can be slid out of the connecting groove, and the clamping plate 17 can be quickly replaced.
[0034] A protective plate 23 is provided at the lower end of the base plate 1. The protective plate 23 is U-shaped. Both sides of the upper end of the protective plate 23 are fixedly installed on the lower end of the base plate 1. An electric push rod 3 25 is fixedly installed at the center of the inner end of the protective plate 23. The output end of the electric push rod 3 25 passes through the side wall of the base plate 1 and is connected to a lifting plate 24. The lifting plate 24 is located at the upper end of the base plate 1. Telescopic rods 26 are fixedly installed on the four sides of the inner end of the protective plate 23. The upper end of the telescopic rod 26 passes through the side wall of the base plate 1 and is fixedly connected to the four sides of the lower end of the lifting plate 24. When the electric push rod 3 25 is started, the lifting plate 24 can be lifted upward, thereby lifting the beer barrel placed on the upper end of the lifting plate 24 upward, which is convenient for filling beer into the beer barrel.
[0035] The water collecting box 29 is located at one side of the bottom plate 1 . A water spray pipe 32 is installed in the water collecting box 29 . A filter plate 34 is elastically connected to the upper end of the water collecting box 29 . A circular hole 35 is opened at the center of the filter plate 34 . The upper end of the water spray pipe 32 is located in the circular hole 35 .
[0036] A drain pipe 30 is fixedly installed on one side of the lower end of the water collecting box 29. The drain pipe 30 is used to drain the water in the water collecting box 29 and collect it for use. A water inlet pipe 31 is fixedly installed on the side wall of the other end. The water inlet pipe 31 is connected to the lower end of the water spray pipe 32. A number of water spray holes are evenly opened on the side wall of the water spray pipe 32, which can spray water in all directions. One end of the water inlet pipe 31 is connected to a high-pressure water pump, and water is transported to the water spray pipe 32 through the high-pressure water pump and sprayed out through the water spray pipe 32 to clean the beer barrel. Springs 33 are fixedly installed on the four sides of the inner end of the water collecting box 29. The springs 33 The upper end of the filter plate 3 is fixedly connected to the lower end of the filter plate 34, and the outer wall of the filter plate 34 is slidably connected to the inner wall of the water collecting box 29. By placing the beer barrel upside down on the upper end of the filter plate 34, the filter plate 34 is moved downward by the compression spring 33 due to gravity, and the water spray pipe 32 extends out of the inner side of the beer barrel. By starting the high-pressure water pump, the inside of the beer barrel can be cleaned. Water retaining plates 36 are fixedly installed on the four sides of the upper end of the filter plate 34. The cleaned water flows out of the beer barrel, is filtered by the filter plate 34, and then flows into the water collecting box 29 for collection. The water retaining plates 36 play a role in shielding the water on the filter plate 34.
[0037] When the device is working, the beer barrel is placed upside down on the upper end of the filter plate 34. The filter plate 34 is moved downward by gravity through the compression spring 2 33, and the water spray pipe 32 extends out of the inner side of the beer barrel. The inside of the beer barrel can be cleaned by starting the high-pressure water pump. After cleaning, the clamping plate 17 is driven to clamp the beer barrel, and then it is turned 180 degrees, moved and placed on the upper end of the lifting plate 24, and then the electric push rod 3 25 drives the lifting plate 24 and the beer barrel to move up and be located at the lower end of the beer outlet pipe of the filling component 28, and the beer barrel is filled with beer through the filling component 28.
[0038] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. Beer barrel walking cleaning double-head filling machine, including: A bottom plate (1), a fixed frame (27), a filling component (28) and a water collecting box (29), wherein the fixed frame (27) is U-shaped and fixedly mounted on the upper end of the bottom plate (1), and the filling component (28) is fixedly mounted on the upper end of the fixed frame (27), characterized in that: a support frame (2) is fixedly mounted on the front and rear sides of the upper end of the bottom plate (1), the support frame (2) is U-shaped, a sliding rod (4) is fixedly mounted on the inner side of the upper end of one of the support frames (2), and a threaded rod (3) is rotatably connected to the inner side of the upper end of the other support frame (2); A movable plate (6) is movably connected between the threaded rod (3) and the sliding rod (4), and a clamping component is installed at the lower end of the movable plate (6); The water collecting box (29) is located at one side of the bottom plate (1), a water spray pipe (32) is installed in the water collecting box (29), the upper end of the water collecting box (29) is elastically connected to a filter plate (34), a circular hole (35) is opened at the center of the filter plate (34), and the upper end of the water spray pipe (32) is located in the circular hole (35).
2. The beer barrel walking type cleaning double-head filling machine according to claim 1 is characterized in that: A servo motor (5) is fixedly mounted on the side wall of the other support frame (2); the left and right ends of the threaded rod (3) are rotatably connected to the inner walls of the left and right ends of the support frame (2); and one end of the threaded rod (3) passes through the side wall of the support frame (2) and is fixedly connected to the output end of the servo motor (5).
3. The beer barrel walking type cleaning double-head filling machine according to claim 1 is characterized in that: A sliding sleeve (7) is fixedly mounted on one end of the movable plate (6), and a threaded sleeve (8) is fixedly mounted on the other end; the inner wall of the sliding sleeve (7) is slidably connected to the outer wall of the sliding rod (4); the inner wall of the threaded sleeve (8) is threadedly connected to the outer wall of the threaded rod (3); and guide holes (9) are provided on the left and right side walls of the movable plate (6).
4. The beer barrel walking type cleaning double-head filling machine according to claim 1 is characterized in that: The clamping component comprises a mounting plate (12), a connecting plate (13), a clamping plate (17) and a driving motor (22); an electric push rod (11) and a guide rod (10) are fixedly mounted on the upper end of the mounting plate (12); the upper end of the electric push rod (11) is fixedly connected to the lower end of the movable plate (6); and the upper end of the guide rod (10) slides through the guide hole (9).
5. The beer barrel walking type cleaning double-head filling machine according to claim 4 is characterized in that: The connecting plates (13) are provided with two and are L-shaped. One end of the two connecting plates (13) is fixedly mounted on the left and right sides of the lower end of the mounting plate (12), respectively. The other ends of the two connecting plates (13) are rotatably connected to a rotating shaft (14) through a bearing. A rotating plate (15) is fixedly mounted on one end of the rotating shaft (14). A second electric push rod (16) is fixedly mounted on the side wall of the other end of the rotating plate (15). A slider (21) is fixedly mounted on the output end of the second electric push rod (16). A fixing hole is provided at the upper end of the slider (21). A driving motor (22) is fixedly mounted on the other end of one of the connecting plates (13), and the output end of the driving motor (22) is fixedly connected to the other end of one of the rotating shafts (14) through a coupling.
6. The beer barrel walking type cleaning double-head filling machine according to claim 5 is characterized in that: The clamping plate (17) is in an arc shape. The clamping plates (17) are provided with two pieces. A fixing block (18) is fixedly installed at the rear end of each clamping plate (17). A connecting groove is provided at one end of the fixing block (18). The upper end of the fixing block (18) is slidably connected to a limiting pin (19). A spring (20) is sleeved on the outer wall of the limiting pin (19). One end of the spring (20) is fixedly connected to the upper outer wall of the fixing block (18), and the other end is fixedly connected to the other end of the limiting pin (19). The slider (21) is slidably inserted into the connecting groove, and the limiting pin (19) is inserted into the fixing hole under the action of the spring (20).
7. The beer barrel walking type cleaning double-head filling integrated machine according to claim 1 is characterized in that: A drainage pipe (30) is fixedly mounted on one side of the lower end of the water collecting box (29), and a water inlet pipe (31) is fixedly mounted on the side wall of the other end. The lower ends of the water inlet pipe (31) and the water spray pipe (32) are connected. A spring 2 (33) is fixedly mounted on four sides of the inner end of the water collecting box (29). The upper end of the spring 2 (33) is fixedly connected to the lower end of the filter plate (34). The outer wall of the filter plate (34) is slidably connected to the inner wall of the water collecting box (29). A water retaining plate (36) is fixedly mounted on four sides of the upper end of the filter plate (34).
8. The beer barrel walking type cleaning double-head filling integrated machine according to claim 1 is characterized by: A protective plate (23) is provided at the lower end of the base plate (1), the protective plate (23) is U-shaped, both sides of the upper end of the protective plate (23) are fixedly mounted on the lower end of the base plate (1), an electric push rod three (25) is fixedly mounted at the center of the inner end of the protective plate (23), and the output end of the electric push rod three (25) passes through the side wall of the base plate (1) and is connected to the lifting plate (24).
9. The beer barrel walking type cleaning double-head filling integrated machine according to claim 8, characterized in that: Telescopic rods (26) are fixedly mounted on the four sides of the inner end of the protection plate (23), and the upper end of the telescopic rod (26) passes through the side wall of the bottom plate (1) and is fixedly connected to the four sides of the lower end of the lifting plate (24).
Citation Information
Cited By
Beer barrel walking type cleaning and double-end filling all-in-one machine
CN118723903A