CN112136521A - Automatic device of windowing in granary - Google Patents
Automatic device of windowing in granary Download PDFInfo
- Publication number
- CN112136521A CN112136521A CN202011008443.7A CN202011008443A CN112136521A CN 112136521 A CN112136521 A CN 112136521A CN 202011008443 A CN202011008443 A CN 202011008443A CN 112136521 A CN112136521 A CN 112136521A
- Authority
- CN
- China
- Prior art keywords
- grain bin
- fixedly connected
- granary
- window
- automatic
- 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.)
- Pending
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Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01F—PROCESSING OF HARVESTED PRODUCE; HAY OR STRAW PRESSES; DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE
- A01F25/00—Storing agricultural or horticultural produce; Hanging-up harvested fruit
- A01F25/16—Arrangements in forage silos
- A01F25/22—Ventilating arrangements
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F15/00—Power-operated mechanisms for wings
- E05F15/60—Power-operated mechanisms for wings using electrical actuators
- E05F15/603—Power-operated mechanisms for wings using electrical actuators using rotary electromotors
- E05F15/611—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for swinging wings
- E05F15/616—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for swinging wings operated by push-pull mechanisms
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B7/00—Special arrangements or measures in connection with doors or windows
- E06B7/16—Sealing arrangements on wings or parts co-operating with the wings
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05Y2900/00—Application of doors, windows, wings or fittings thereof
- E05Y2900/10—Application of doors, windows, wings or fittings thereof for buildings or parts thereof
- E05Y2900/13—Application of doors, windows, wings or fittings thereof for buildings or parts thereof characterised by the type of wing
- E05Y2900/148—Windows
Abstract
The invention belongs to the field of granary storage, and particularly relates to an automatic granary windowing device, which comprises a granary, wherein two adjacent side surfaces of the granary are fixedly connected with a plurality of ventilating fans, air outlets of the ventilating fans extend into the granary, two adjacent side surfaces outside the granary are rotatably connected with a window body, two adjacent side surfaces of the granary are respectively provided with a ventilating hole, the ventilating holes are matched with the window body, two adjacent side surfaces of the granary are respectively and fixedly provided with a driving box, the two driving boxes are respectively positioned above the two window bodies, one side of each driving box is fixedly connected with a motor, and an output shaft of the motor extends into the driving box and is fixedly connected with a driving shaft; the automatic grain bin windowing device body is simple to operate, realizes ventilation in the grain bin at any time, ensures that the storage environment in the grain bin is in a dry state, greatly improves the safety of grain storage, and has strong practicability.
Description
Technical Field
The invention relates to the technical field of granary storage, in particular to an automatic window opening device for a granary.
Background
Grain is a strategic material of the country and a daily necessity of people. Developing agriculture should be the central focus of developing economic efforts. In the current international grain crisis, Chinese grains are basically self-sufficient and have a certain grain reserve. The Chinese government has consistently paid high attention to grain production, and has formulated a series of preferential policies for encouraging grain production, such as canceling agricultural tax, building commercial grain production bases and the like, so as to stabilize rural labor force and ensure grain production.
The grain needs to be stored after being harvested, the grain storage quality is closely related to national grain safety and people life quality, currently, stored grain is stored by depending on a large-sized granary, the storage time of the granary is directly influenced by the internal air humidity in the storage process, and the granary needs to be ventilated and ventilated regularly when the internal air humidity of the granary is maintained within a specified range.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides an automatic grain bin windowing device.
In order to achieve the purpose, the invention adopts the following technical scheme:
an automatic grain bin window opening device comprises a grain bin, wherein two adjacent side faces of the grain bin are fixedly connected with a plurality of ventilation fans, air outlets of the ventilation fans extend into the grain bin, two adjacent side faces of the outer side of the grain bin are rotatably connected with window bodies, two adjacent side faces of the grain bin are provided with ventilation holes, the ventilation holes are matched with the window bodies, two adjacent side faces of the grain bin are fixedly provided with driving boxes, the two driving boxes are respectively positioned above the two window bodies, one side of each driving box is fixedly connected with a motor, an output shaft of the motor extends into the driving boxes and is fixedly connected with a driving shaft, a first gear is fixedly sleeved on the outer side of the driving shaft, a movable plate is connected on the inner wall of the top of the driving box in a sliding manner, a first rack is fixedly connected to the bottom of the movable plate, the first gear is meshed with the first rack, one side fixedly connected with second rack of movable plate, it is connected with the rotary rod to rotate on the bottom inner wall of drive case, the fixed cover in the outside of rotary rod is equipped with the worm, the fixed cover in the outside of rotary rod is equipped with the second gear, second gear and second rack mesh mutually, it is connected with same dwang to rotate on the both sides inner wall of drive case, the fixed cover in the outside of dwang is equipped with the worm wheel, worm wheel and worm mesh mutually, the outside cover of dwang is equipped with the connecting rod, the rotation hole has been seted up on one side inner wall of drive case, the one end through connection pole of connecting rod extends to one side of drive case, the one end of connecting rod and one side of window body are rotated and.
Preferably, the bottom of the granary is fixedly connected with a base, the height of the base is ten to fifteen centimeters, and the situation that moisture enters the granary due to the fact that the granary is directly contacted with the ground is avoided through the base.
Preferably, one side of the granary is fixedly connected with strip-shaped glass, scales are arranged on the strip-shaped glass, and the grain storage capacity in the granary can be observed by utilizing the strip-shaped glass.
Preferably, the top of the granary is fixedly connected with a feeding pipe, and grains can be conveyed into the granary by the feeding pipe.
Preferably, one side fixedly connected with a plurality of moisture detectors of granary, and moisture detector's detection head is located the granary, the outside difference fixedly connected with display operation screen and controller of granary, it is a plurality of moisture detector all with display operation screen electric connection, display operation screen and controller electric connection, display operation screen respectively with motor and ventilation fan electric connection, utilize moisture detector can detect the interior humidity of granary, in case humidity exceeds the setting value scope, moisture detector gives the controller with signal transmission this moment, the controller shows the operation screen with signal transmission, utilizes to show the operation screen and can open the motor to can open the window form, start the ventilation fan and promoted the air flow in the granary, be favorable to the interior drying of granary.
Preferably, one side fixedly connected with installation pole of window form, the one end fixedly connected with sleeve of connecting rod, the installation pole runs through the sleeve and rotates with the sleeve and be connected, utilizes installation pole and sleeve can realize that connecting rod and window form rotate to be connected.
Preferably, the top of the moving plate is fixedly connected with two guide wheels which are symmetrically arranged, the inner wall of the top of the driving box is fixedly connected with a guide rail, the two guide wheels are respectively in sliding connection with the two guide rails, and the guide wheels and the guide rails can be used for realizing the top sliding connection of the moving plate and the driving box.
Preferably, one side fixedly connected with annular sealed pad and sealed cardboard of window form, sealed cardboard and ventilation hole looks adaptation, the annular seal groove has been seted up to the outside annular of granary, and annular sealed pad and annular seal groove looks block, utilize annular sealed pad and annular seal groove to improve the leakproofness of window form and granary.
In the invention, the humidity detector can be used for detecting the humidity in the granary, once the humidity exceeds a set value range, the humidity detector transmits a signal to the controller, the controller transmits the signal to the display operation screen, the motor can be started by using the display operation screen, the motor can drive the first gear to rotate, the first gear is meshed with the first rack, so the moving plate can be driven to move transversely, the second rack on the moving plate is meshed with the second gear, so the rotating rod can be driven to rotate, the worm on the rotating rod is meshed with the worm wheel, so the rotating rod can be driven to rotate, the rotating rod can pull up the window body through the connecting rod, at the moment, the vent hole on the granary can be opened, then the ventilating fan is started, the air flow in the granary can be promoted by using the ventilating fan, and the flowing air is beneficial to discharging the humid air in the granary, when the air humidity in the granary is controlled within the specified range, the starting motor rotates reversely at the moment, the window body is closed, and meanwhile, the annular sealing gasket is clamped on the annular sealing groove, so that the sealing performance of the window body and the granary is improved, and the storage environment in the granary is prevented from being influenced by the external environment.
The automatic grain bin windowing device body is simple to operate, realizes ventilation in the grain bin at any time, ensures that the storage environment in the grain bin is in a dry state, greatly improves the safety of grain storage, and has strong practicability.
Drawings
Fig. 1 is a schematic view of the whole structure of an automatic window opening device for a granary according to the present invention;
fig. 2 is a schematic side view of the driving box of fig. 1 of an automatic window opening device for a granary according to the present invention;
fig. 3 is a schematic view of a window three-dimensional structure of an automatic granary windowing device provided by the invention;
fig. 4 is a schematic partial side sectional view of the automatic grain bin windowing device of fig. 1 according to the present invention;
fig. 5 is a schematic three-dimensional structure view of the automatic grain bin windowing device in fig. 2, wherein the first gear and the first rack are meshed;
fig. 6 is an enlarged structural schematic view of a portion a of an automatic window opening device for a granary according to the present invention;
fig. 7 is a schematic three-dimensional structure diagram of a controller of an automatic grain bin windowing device according to the present invention.
In the figure: 1. a base; 2. a granary; 3. a ventilating fan; 4. a window body; 5. a drive box; 6. a motor; 7. a drive shaft; 8. a first gear; 9. moving the plate; 10. a first rack; 11. a second rack; 12. rotating the rod; 13. a worm; 14. a second gear; 15. rotating the hole; 16. rotating the rod; 17. a worm gear; 18. a connecting rod; 19. mounting a rod; 20. a sleeve; 21. a humidity detector 22, a display operation screen; 23. a controller; 24. strip-shaped glass; 25. an annular seal; 26. a sealing clamping plate; 27. an annular seal groove; 28. a feeding pipe.
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.
Example one
Referring to fig. 1-7, an automatic window opening device for a granary comprises a granary 2, two adjacent side surfaces of the granary 2 are fixedly connected with a plurality of ventilating fans 3, air outlets of the ventilating fans 3 extend into the granary 2, two adjacent side surfaces of the outside of the granary 2 are rotatably connected with window bodies 4, two adjacent side surfaces of the granary 2 are provided with vent holes, the vent holes are matched with the window bodies 4, two adjacent side surfaces of the granary 2 are fixedly provided with driving boxes 5, the two driving boxes 5 are respectively positioned above the two window bodies 4, one side of the driving box 5 is fixedly connected with a motor 6, an output shaft of the motor 6 extends into the driving box 5 and is fixedly connected with a driving shaft 7, the outside of the driving shaft 7 is fixedly sleeved with a first gear 8, the inner wall of the top of the driving box 5 is slidably connected with a movable plate 9, the bottom of the movable plate 9 is fixedly connected with, first gear 8 and the meshing of first rack 10 mutually, one side fixedly connected with second rack 11 of movable plate 9, it is connected with rotary rod 12 to rotate on the bottom inner wall of drive box 5, the fixed cover in outside of rotary rod 12 is equipped with worm 13, the fixed cover in outside of rotary rod 12 is equipped with second gear 14, second gear 14 and the meshing of second rack 11 mutually, it is connected with same dwang 16 to rotate on the both sides inner wall of drive box 5, the fixed cover in outside of dwang 16 is equipped with worm wheel 17, worm wheel 17 and worm 13 mesh mutually, the outside cover of dwang 16 is equipped with connecting rod 18, rotation hole 15 has been seted up on one side inner wall of drive box 5, connecting rod 18's one end runs through connecting rod 18 and extends to one side of drive box 5, connecting rod 18's one end and one side.
Example two
The embodiment is improved on the basis of the first embodiment: the bottom of the granary 2 is fixedly connected with a base 1, the height of the base 1 is between ten to fifteen centimeters, the situation that moisture enters the granary 2 due to the fact that the granary 2 is directly contacted with the ground is avoided by the base 1, one side of the granary 2 is fixedly connected with a strip-shaped glass 24, scales are arranged on the strip-shaped glass 24, the grain storage amount in the granary 2 can be observed by the strip-shaped glass 24, the top of the granary 2 is fixedly connected with a feeding pipe 28, grains can be conveyed into the granary 2 by the feeding pipe 28, one side of the granary 2 is fixedly connected with a plurality of humidity detectors 21, detection heads of the humidity detectors 21 are located in the granary 2, the outer side of the granary 2 is fixedly connected with a display operation screen 22 and a controller 23 respectively, the humidity detectors 21 are electrically connected with the display operation screen 22, the display operation screen 22 is electrically connected with the controller 23, the display operation screen 22 is electrically connected with the motor 6 and the ventilating, the humidity in the granary 2 can be detected by using the humidity detector 21, once the humidity exceeds a set value range, the humidity detector 21 transmits a signal to the controller 23, the controller 23 transmits the signal to the display operation screen 22, the motor 6 can be started by using the display operation screen 22, the window 4 can be opened, the ventilating fan 3 is started to promote the air flow in the granary 2, the drying in the granary 2 is facilitated, one side of the window 4 is fixedly connected with the installation rod 19, one end of the connecting rod 18 is fixedly connected with the sleeve 20, the installation rod 19 penetrates through the sleeve 20 and is rotatably connected with the sleeve 20, the connecting rod 18 can be rotatably connected with the window 4 by using the installation rod 19 and the sleeve 20, the top of the movable plate 9 is fixedly connected with two guide wheels which are symmetrically arranged, the guide rail is fixedly connected on the inner wall of the top of the driving box 5, and the two guide wheels, utilize guide pulley and guide rail can realize the top sliding connection of movable plate 9 and drive box 5, one side fixedly connected with annular seal pad 25 and sealed cardboard 26 of window body 4, sealed cardboard 26 and ventilation hole looks adaptation, annular seal groove 27 has been seted up to the outside annular of granary 2, and annular seal pad 25 and annular seal groove 27 looks block, utilize annular seal pad 25 and annular seal groove 27 to improve the leakproofness of window body 4 and granary 2.
The working principle is as follows: the humidity detector 21 can be used for detecting the humidity in the granary 2, once the humidity exceeds a set value range, the humidity detector 21 transmits a signal to the controller 23, the controller 23 transmits a signal to the display operation screen 22, the display operation screen 22 can be used for starting the motor 6, the motor 6 can drive the first gear 8 to rotate, the first gear 8 is meshed with the first rack 10, so that the moving plate 9 can be driven to move transversely, the second rack 11 on the moving plate 9 is meshed with the second gear 14, so that the rotating rod 12 can be driven to rotate, the worm 13 on the rotating rod 12 is meshed with the worm wheel 17, so that the rotating rod 16 can be driven to rotate, the rotating rod 16 can pull up the window 4 through the connecting rod 18, at the moment, the vent hole on the granary 2 can be opened, then the ventilating fan 3 is started, the air flow in the granary 2 can be promoted by the ventilating fan 3, the air that flows is favorable to humid air to be discharged in granary 2, and when the air humidity control in granary 2 was within the appointed scope, starting motor 6 reversal this moment, with window 4 closure, with annular sealing gasket 25 block on annular seal groove 27 simultaneously, and then improved window 4 and granary 2's leakproofness, prevented the storage environment in the outside environment influence granary 2.
However, as is well known to those skilled in the art, the operation principle and wiring method of the motor device, the ventilation fan device, the humidity detector device, the display operation screen device and the controller device are common and are conventional means or common knowledge, and thus, they will not be described herein again, and those skilled in the art can make any choice according to their needs or convenience.
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 (8)
1. An automatic grain bin window opening device comprises a grain bin (2) and is characterized in that two adjacent side faces of the grain bin (2) are fixedly connected with a plurality of ventilating fans (3), air outlets of the ventilating fans (3) extend into the grain bin (2), two adjacent side faces of the outer side of the grain bin (2) are rotatably connected with window bodies (4), two adjacent side faces of the grain bin (2) are provided with ventilating holes, the ventilating holes are matched with the window bodies (4), two adjacent side faces of the grain bin (2) are fixedly provided with driving boxes (5), the two driving boxes (5) are respectively positioned above the two window bodies (4), one side of each driving box (5) is fixedly connected with a motor (6), an output shaft of the motor (6) extends into the driving box (5) and is fixedly connected with a driving shaft (7), a first gear (8) is fixedly sleeved on the outer side of the driving shaft (7), sliding connection has movable plate (9) on the top inner wall of drive case (5), the first rack of bottom fixedly connected with (10) of movable plate (9), first gear (8) and first rack (10) mesh mutually, one side fixedly connected with second rack (11) of movable plate (9), it is connected with rotary rod (12) to rotate on the bottom inner wall of drive case (5), the fixed cover in the outside of rotary rod (12) is equipped with worm (13), the fixed cover in the outside of rotary rod (12) is equipped with second gear (14), second gear (14) and second rack (11) mesh mutually, it is connected with same dwang (16) to rotate on the both sides inner wall of drive case (5), the fixed cover in the outside of dwang (16) is equipped with worm wheel (17), worm wheel (17) and worm (13) mesh mutually, the outside cover of dwang (16) is equipped with connecting rod (18), the window is characterized in that a rotating hole (15) is formed in the inner wall of one side of the driving box (5), one end of the connecting rod (18) penetrates through the connecting rod (18) and extends to one side of the driving box (5), and one end of the connecting rod (18) is rotatably connected with one side of the window body (4).
2. The automatic grain bin windowing device according to claim 1, characterized in that a base (1) is fixedly connected to the bottom of the grain bin (2), and the height of the base (1) is between ten and fifteen centimeters.
3. The automatic grain bin windowing device according to claim 1, wherein a strip-shaped glass (24) is fixedly connected to one side of the grain bin (2), and scales are arranged on the strip-shaped glass (24).
4. The automatic grain bin windowing device according to claim 1, characterized in that a feeding pipe (28) is fixedly connected to the top of the grain bin (2).
5. The automatic grain bin windowing device according to claim 1, wherein a plurality of moisture detectors (21) are fixedly connected to one side of the grain bin (2), detection heads of the moisture detectors (21) are located in the grain bin (2), a display operation screen (22) and a controller (23) are fixedly connected to the outer side of the grain bin (2) respectively, the moisture detectors (21) are all electrically connected with the display operation screen (22), the display operation screen (22) is electrically connected with the controller (23), and the display operation screen (22) is electrically connected with a motor (6) and a ventilating fan (3) respectively.
6. The automatic grain bin windowing device according to claim 1, characterized in that a mounting rod (19) is fixedly connected to one side of the window (4), a sleeve (20) is fixedly connected to one end of the connecting rod (18), and the mounting rod (19) penetrates through the sleeve (20) and is rotatably connected with the sleeve (20).
7. The automatic grain bin windowing device according to claim 1, wherein two symmetrically arranged guide wheels are fixedly connected to the top of the moving plate (9), guide rails are fixedly connected to the inner wall of the top of the driving box (5), and the two guide wheels are respectively connected with the two guide rails in a sliding manner.
8. The automatic grain bin windowing device according to claim 1, wherein an annular sealing gasket (25) and a sealing clamping plate (26) are fixedly connected to one side of the window body (4), the sealing clamping plate (26) is matched with the ventilation hole, an annular sealing groove (27) is annularly formed in the outer side of the grain bin (2), and the annular sealing gasket (25) is clamped with the annular sealing groove (27).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011008443.7A CN112136521A (en) | 2020-09-23 | 2020-09-23 | Automatic device of windowing in granary |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011008443.7A CN112136521A (en) | 2020-09-23 | 2020-09-23 | Automatic device of windowing in granary |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112136521A true CN112136521A (en) | 2020-12-29 |
Family
ID=73897794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011008443.7A Pending CN112136521A (en) | 2020-09-23 | 2020-09-23 | Automatic device of windowing in granary |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112136521A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB298500A (en) * | 1928-07-05 | 1928-10-02 | John Harold Smith Wright | Improvements in and relating to wind screens for motor cars and the like |
| CN204907232U (en) * | 2015-09-02 | 2015-12-30 | 连云港市农业科学院 | Novel rice storage grain bin |
| CN110679449A (en) * | 2019-11-14 | 2020-01-14 | 柳宝宝 | Agricultural watering mechanical equipment for irrigation |
| CN110805324A (en) * | 2019-11-15 | 2020-02-18 | 湖南省康多利油脂有限公司 | Tea-oil camellia seed storage warehouse |
| CN210512102U (en) * | 2019-07-27 | 2020-05-12 | 杭州和派空调设备有限公司 | Air-conditioning outlet convenient to adjust |
| CN111459216A (en) * | 2020-04-23 | 2020-07-28 | 湖州誉晨机械科技有限公司 | Storage information display method and device |
| CN211353174U (en) * | 2019-12-09 | 2020-08-28 | 河南西城电子科技有限公司 | Heat accumulation discharging system for granary |
-
2020
- 2020-09-23 CN CN202011008443.7A patent/CN112136521A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB298500A (en) * | 1928-07-05 | 1928-10-02 | John Harold Smith Wright | Improvements in and relating to wind screens for motor cars and the like |
| CN204907232U (en) * | 2015-09-02 | 2015-12-30 | 连云港市农业科学院 | Novel rice storage grain bin |
| CN210512102U (en) * | 2019-07-27 | 2020-05-12 | 杭州和派空调设备有限公司 | Air-conditioning outlet convenient to adjust |
| CN110679449A (en) * | 2019-11-14 | 2020-01-14 | 柳宝宝 | Agricultural watering mechanical equipment for irrigation |
| CN110805324A (en) * | 2019-11-15 | 2020-02-18 | 湖南省康多利油脂有限公司 | Tea-oil camellia seed storage warehouse |
| CN211353174U (en) * | 2019-12-09 | 2020-08-28 | 河南西城电子科技有限公司 | Heat accumulation discharging system for granary |
| CN111459216A (en) * | 2020-04-23 | 2020-07-28 | 湖州誉晨机械科技有限公司 | Storage information display method and device |
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Application publication date: 20201229 |