CN215556314U - Multi-roller distributing device - Google Patents
Multi-roller distributing device Download PDFInfo
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- CN215556314U CN215556314U CN202121156205.0U CN202121156205U CN215556314U CN 215556314 U CN215556314 U CN 215556314U CN 202121156205 U CN202121156205 U CN 202121156205U CN 215556314 U CN215556314 U CN 215556314U
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Abstract
The utility model discloses a multi-roller distributor, and belongs to the technical field of sintering. The multi-roller distributor comprises: the fixed end of the first driving unit is fixedly arranged on the rack, the action end of the first driving unit is connected with the first driving gear mechanism, and the first driving gear mechanism is connected with the first driving roller; the first driving roller is rotatably arranged on the frame; the two first idle wheels correspond to the two first driven gear mechanisms one by one, and the first driven gear mechanisms are connected with a first driving gear mechanism through the first idle wheels; the two first driven rollers are rotatably arranged on the rack; the two first driven rollers correspond to the two first driven gear mechanisms one by one, and the first driven rollers are connected with the corresponding first driven gear mechanisms. The multi-roller distributing device has the advantages of simplified load types, reduced load size and ensured service life.
Description
Technical Field
The utility model relates to the technical field of sintering, in particular to a multi-roller distributing device.
Background
A part of fine concentrates are added in all sintering raw materials in iron and steel enterprises in China, and the fine concentrates come from different producing areas and belong to different varieties. In order to fully utilize a heat source and reduce fuel consumption, a mixture strengthening granulation technology is generally adopted in each sintering plant, so that higher requirements are provided for a multi-roller material distribution technology matched with the multi-roller material distribution device, and the multi-roller material distribution device is a key device for completing the material distribution technology and has the effects of granularity segregation, re-balling, smoother material distribution, better air permeability and the like, so that the yield and the quality of sintered ores are effectively improved, and the operation cost is reduced.
The driving principle of the multi-roller distributing device is that a body is composed of N rollers which are arranged in parallel and have the same diameter, a plurality of relatively independent driving units form a driving mechanism, a plurality of intermediate wheel transitions, 1 driving gear and a plurality of driven gears are used for transmission in a transmission gear box of the driving mechanism, and a single driving unit operates independently; by eliminating a certain intermediate wheel, the working load among all the driving units is isolated, and the N roller barrels rotate synchronously.
However, in actual work, the transmission gears, especially the driving gears, of the multi-roller distributing device are worn very fast, the driving assembly generally has an operating life of about 5 months, the driving assembly can not achieve the aim of synchronous replacement with the roller wear period (12 months) or the aim of synchronous maintenance with the main sintering machine equipment fixed maintenance, and the phenomenon of 'faulty' operation (the climate can reach more than 4 months in hot summer) under the condition that part or all of the rollers are forced not to rotate often occurs, so that the yield and the quality of sintering ores are seriously influenced.
SUMMERY OF THE UTILITY MODEL
The utility model provides a multi-roller distributing device, which solves or partially solves the technical problems that in the prior art, a transmission gear, particularly a driving gear of the multi-roller distributing device is worn very fast, and the service life is influenced.
In order to solve the technical problem, the utility model provides a multi-roller distributing device which comprises: the device comprises a rack and a plurality of first roller bed devices; the first roller bed device comprises: the device comprises a first driving unit, a first driving gear mechanism, a first driving roller, two first idle wheels, two first driven gear mechanisms and two first driven rollers; the fixed end of the first driving unit is fixedly arranged on the rack, the action end of the first driving unit is connected with the first driving gear mechanism, and the first driving gear mechanism is connected with the first driving roller; the first driving roller is rotatably arranged on the rack, and the first driving roller is arranged between the two first driven rollers; the two first idle wheels correspond to the two first driven gear mechanisms one by one, and the first driven gear mechanisms are connected with a first driving gear mechanism through the first idle wheels; the two first driven rollers are rotatably arranged on the rack; the two first driven rollers correspond to the two first driven gear mechanisms one by one, and the first driven rollers are connected with the corresponding first driven gear mechanisms.
Further, the first driving unit further includes: a driving motor, a speed reducer and an output shaft; the input end of the speed reducer is connected with the action end of the driving motor, and the output end of the speed reducer is connected with the output shaft; and the end part of the output shaft departing from the speed reducer is connected with the first driving gear mechanism.
Further, the first driving gear mechanism includes: the gear assembly comprises a driving gear, a first gear supporting bearing, a first connecting shaft and a second connecting shaft; the driving gear is arranged on the rack through the first gear supporting bearing; the first end of the first connecting shaft is connected with the action end of the first driving unit, and the second end of the first connecting shaft is fixedly connected with the driving gear; the first end of the second connecting shaft is fixedly connected with the end part, deviating from the first connecting shaft, of the driving gear, and the second end of the second connecting shaft is connected with the first driving roller.
Further, the first driven gear mechanism includes: the driven gear, the second gear supporting bearing and the third connecting shaft; the driven gear is arranged on the frame through the second gear supporting bearing; the first end of the third connecting shaft is fixedly connected with the driven gear, and the third end of the second connecting shaft is connected with the first driven roller.
Further, the first driving roller and the two first driven rollers are arranged on the rack through two first supporting bearings.
Further, the multi-roller distributor further comprises: a second roller way device; and the feed inlet of the second roller way device is communicated with the discharge outlet of the last first roller way device in the plurality of first roller way devices.
Further, the second roller way device comprises: the second driving unit, the second driving gear mechanism and the second driving roller; the fixed end of the second driving unit is fixedly arranged on the rack, and the action end of the second driving unit is connected with the second driving gear mechanism; the second driving gear mechanism is connected with a second driving roller; the second driving roller is rotatably arranged on the frame.
Further, the second drive roll is arranged on the frame through two second support bearings.
Further, the multi-roller distributor further comprises: a third roller way device; the feed inlet of the third roller bed device is communicated with the discharge outlet of the last roller bed device in the plurality of first roller bed devices; the third roller way device comprises: the third driving unit, a third driving gear mechanism, a third driving roller, a second intermediate wheel, a second driven gear mechanism and a third driven roller; the fixed end of the third driving unit is fixedly arranged on the rack, the action end of the third driving unit is connected with the third driving gear mechanism, and the third driving gear mechanism is connected with the third driving roller; the third driving roller is rotatably arranged on the frame; the second driven gear mechanism is connected with a third driving gear mechanism through the second intermediate wheel; the second driven roller is rotatably arranged on the rack; the second driven roller is connected with the second driven gear mechanism.
Further, the third driving roller and the two third driven rollers are arranged on the frame through two third supporting bearings.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
because the fixed end of the first driving unit is fixedly arranged on the frame, the action end of the first driving unit is connected with the first driving gear mechanism, the first driving gear mechanism is connected with the first driving roller, the first driving roller is rotatablely arranged on the frame, the first driving roller is arranged between two first driven rollers, the two first idle wheels are in one-to-one correspondence with the two first driven gear mechanisms, the first driven gear mechanisms are connected with the first driving gear mechanism through the first idle wheels, the two first driven rollers are rotatablely arranged on the frame, the two first driven rollers are in one-to-one correspondence with the two first driven gear mechanisms, the first driven rollers are connected with the corresponding first driven gear mechanisms, when the material is to be distributed, the first driving unit is started, the action end of the first driving unit drives the first driving gear mechanism to act on the frame, the first driving gear mechanism drives the first driving roller to act, meanwhile, the first gear mechanism drives the two first driven gear mechanisms to act through the two first intermediate wheels, so that the rotating direction of the first driven gear mechanisms is the same as that of the first driving gear mechanism, one first driving gear mechanism only drives the two first driven gear mechanisms to act, the first driving gear mechanism only bears the action of driving torque moment and does not bear the action of external force, the load type is simplified, the load size is reduced, the service life is ensured, the service life can reach more than 12 months, the first driven gear mechanism can be completely matched with the fixed repair of a sintering host and the abrasion cycle of a roller, the yield and the quality of sintering ore are ensured, and then the two first driven gear mechanisms drive the first driven roller mechanisms to act on the rack, so that the distribution is realized.
Drawings
Fig. 1 is a schematic structural view of a multi-roller distributor provided in an embodiment of the present invention;
FIG. 2 is a force-resolved schematic diagram of the driving gear mechanism of the multi-roller distributing device shown in FIG. 1
Fig. 3 is a schematic structural view of a nine-roller distributing device provided by an embodiment of the utility model;
FIG. 4 is a schematic structural view of a seven-roller distributing device according to an embodiment of the present invention
Fig. 5 is a schematic structural diagram of an eleven-roller distributor according to an embodiment of the present invention.
Detailed Description
Referring to fig. 1 and 3, a multi-roller material distributor according to an embodiment of the present invention includes: a frame 1 and a plurality of first roller bed devices 2.
The first roller bed device 2 comprises: the device comprises a first driving unit 2-1, a first driving gear mechanism 2-2, a first driving roller 2-3, two first idle gears 2-4, two first driven gear mechanisms 2-5 and two first driven rollers 2-6.
The fixed end of the first driving unit 2-1 is fixedly arranged on the frame 1, the action end of the first driving unit 2-1 is connected with the first driving gear mechanism 2-2, and the first driving gear mechanism 2-2 is connected with the first driving roller 2-3.
The first driving roll 2-3 is rotatably arranged on the frame 1, and the first driving roll 2-3 is arranged between the two first driven rolls 2-6.
The two first intermediate wheels 2-4 correspond to the two first driven gear mechanisms 2-5 one by one, and the first driven gear mechanisms are connected with the first driving gear mechanism 2-2 through the first intermediate wheels 2-4.
Two first driven rollers 2-6 are rotatably arranged on the frame 1.
The two first driven rollers 2-6 correspond to the two first driven gear mechanisms 2-5 one by one, and the first driven rollers 2-6 are connected with the corresponding first driven gear mechanisms 2-5.
In the embodiment of the application, the fixed end of the first driving unit 2-1 is fixedly arranged on the frame 1, the action end of the first driving unit 2-1 is connected with the first driving gear mechanism 2-2, the first driving gear mechanism 2-2 is connected with the first driving roller 2-3, the first driving roller 2-3 is rotatably arranged on the frame 1, the two first idle gears 2-4 are in one-to-one correspondence with the two first driven gear mechanisms 2-5, the first driven gear mechanism is connected with the first driving gear mechanism 2-2 through the first idle gear 2-4, the two first driven rollers 2-6 are rotatably arranged on the frame 1, the two first driven rollers 2-6 are in one-to-one correspondence with the two first driven gear mechanisms 2-5, and the first driven rollers 2-6 are connected with the corresponding first driven gear mechanisms 2-5, therefore, when the material is to be distributed, the first driving unit 2-1 is started, the action end of the first driving unit 2-1 drives the first driving gear mechanism 2-2 to act on the frame 1, the first driving gear mechanism 2-2 drives the first driving roller 2-3 to act, meanwhile, the first gear mechanism 2-2 drives the two first driven gear mechanisms 2-5 to act through the two first intermediate wheels 2-4, so that the rotation direction of the first driven gear mechanism 2-5 is the same as that of the first driving gear mechanism 2-2, thereby realizing that one first driving gear mechanism 2-2 only drives the two first driven gear mechanisms 2-5 to act, the first driving gear mechanism 2-2 only bears the action of driving torque, does not bear the action of external force, simplifies the load types and reduces the load size, the service life is guaranteed to be more than 12 months, the service life can be completely matched with the fixed repair of a sintering host and the abrasion period of a roller, the yield and the quality of sintered ores are guaranteed, and then the two first driven gear mechanisms 2-5 drive the first driven rollers 2-6 to move on the rack 1, so that the distribution is realized.
Specifically, the first drive unit 2-1 further includes: a driving motor 2-11, a speed reducer 2-12 and an output shaft 2-13.
The fixed ends of the driving motors 2-11 are fixedly arranged on the frame 1.
The input end of the speed reducer 2-12 is connected with the action end of the driving motor 2-11, and the output end of the speed reducer 2-12 is connected with the output shaft 2-13. In the present embodiment, the speed reducers 2 to 12 may be cycloidal pin gear speed reducers, and the cycloidal pin gear speed reducers can reach 1: 87 high reduction ratio and high efficiency single-stage transmission of more than 90 percent.
The end part of the output shaft 2-13 departing from the speed reducer 2-12 is connected with the first driving gear mechanism 2-2.
In the embodiment, the driving motor 2-11 is started, the action end of the driving motor 2-11 transmits power to the output shaft 2-13 through the speed reducer 2-12, and the output shaft 2-13 transmits the power to the first driving gear mechanism 2-2.
Specifically, the first driving gear mechanism 2-2 includes: a driving gear 2-21, a first gear supporting bearing 2-22, a first connecting shaft 2-23 and a second connecting shaft 2-24.
The driving gear 2-21 is arranged on the frame 1 through a first gear supporting bearing 2-22, so that the driving gear 2-21 can smoothly rotate on the frame 1.
The first end of the first connecting shaft 2-23 is connected with the action end of the first driving unit 2-1. In the embodiment, the first end of the first connecting shaft 2-23 is connected with the output shaft 2-13 of the first driving unit 2-1, and further, the first end of the first connecting shaft 2-23 can be connected with the output shaft 2-13 of the first driving unit 2-1 through the coupling 2-25, wherein the coupling 2-25 can be a nylon rod coupling, and has the characteristics of good toughness, strong wear resistance, oil resistance, shock resistance, tensile strength, good bending strength, small water absorption, good dimensional stability and the like. The second end of the first connecting shaft 2-23 is fixedly connected with the driving gear 2-21.
The first end of the second connecting shaft 2-24 is fixedly connected with the end part of the driving gear 2-21 departing from the first connecting shaft 2-23, and the second end of the second connecting shaft 2-24 is connected with the first driving roller 2-3. In this embodiment, the second end of the second connecting shaft 2-24 may be connected to the first drive roll 2-3 via a first oldham coupling 2-26.
In the embodiment, the output shaft 2-13 of the first driving unit 2-1 transmits power to the first connecting shaft 2-23, the first connecting shaft 2-23 drives the driving gear 2-21 to rotate on the frame 1 through the first gear supporting bearing 2-21, and then the power is transmitted to the first driving roller 2-3 through the second connecting shaft 2-24. Meanwhile, the driving gear 2-21 drives the two first driven gear mechanisms 2-5 to act through the two first intermediate wheels 2-4, so that the rotating direction of the first driven gear mechanisms 2-5 is the same as that of the driving gear 2-21, one driving gear 2-21 only drives the two first driven gear mechanisms 2-5 to act, the driving gear 2-21 of the first driving gear mechanism 2-2 only bears the driving torque moment, and does not bear the external force, the load type is simplified, the load size is reduced, and the service life is ensured.
Specifically, the first driven gear mechanism 2-5 includes: a driven gear 2-51, a second gear supporting bearing 2-52 and a third connecting shaft 2-53.
The driven gear 2-51 is arranged on the frame 1 via a second gear support bearing 2-52.
The first end of the third connecting shaft 2-53 is fixedly connected with the driven gear 2-51, and the third end of the second connecting shaft 2-53 is connected with the first driven roller 2-6. In the present embodiment, the third end of the second connecting shaft 2-53 may be connected to the first driven roller 2-6 through the second oldham coupling 2-54.
In the embodiment, the driving gear 2-21 of the first driving gear mechanism 2-2 transmits power to the driven gear 2-51 of the first driven gear mechanism 2-5 through the two first intermediate gears 2-4, and the driven gear 2-51 transmits power to the first driven roller 2-6 through the third connecting shaft 2-53, so as to realize material distribution.
Referring to fig. 2, the driving form of one-driving-two is realized by the action of one driving gear 2-21 only driving the driven gears 2-51 of two first driven gear mechanisms 2-5, the most complicated part of the working condition is the driving gear 2-21, and the driving gear bears the working load transmitted by two first intermediate gears 2-4 and bears the driving torque M transmitted by a speed reducer 2-12. Because the driving gear 2-21 is located between the two first idle gears 2-4, the two driven gears 2-51 and the two idle gears 2-4 are distributed on two sides and have the same number, the two sides of the driving gear 2-21 transmit resistance to the driving gear 2-21 respectively, and the stress is decomposed according to the graph 3, then in the X direction: the sizes are equal and the directions are opposite, and are both Fx; in the Y direction: the driving gears 2-21 bear the resultant external force equal to zero and only bear the action of the driving torque M of the speed reducer 2-12, thereby greatly reducing the working load, and the 'one-driving-two' is the optimal driving unit.
Specifically, the first driving roller 2-3 and the two first driven rollers 2-6 are arranged on the frame 1 through two first supporting bearings 2-7, so that the first driving roller 2-3 and the two first driven rollers 2-6 can smoothly rotate on the frame 1.
Referring to fig. 4, the multi-roller distributor further comprises: a second roller means 3.
The feed inlet of the second roller bed device 3 is communicated with the discharge outlet of the last roller bed device in the first roller bed devices 2, and the discharge outlet of the last roller bed device in the first roller bed devices 2 can transmit materials to the second roller bed device 3.
Specifically, the second roller way device 3 includes: a second driving unit 3-1, a second driving gear mechanism 3-2 and a second driving roller 3-3.
The fixed end of the second driving unit 3-1 is fixedly arranged on the frame 1, and the action end of the second driving unit 3-1 is connected with the second driving gear mechanism 3-2. In the present embodiment, the second drive unit 3-1 has the same structure as the first drive unit 2-1.
The second drive gear mechanism 3-2 is connected to the second drive roller 3-3. In the present embodiment, the structure of the second driving gear mechanism 3-2 may be the same as that of the first driving gear mechanism 2-2.
The second drive roll 3-3 is rotatably arranged on the frame 1. In the present embodiment, the second driving roll 3-3 is disposed on the frame 1 through two second support bearings 3-4, which ensures that the second driving roll 3-3 can smoothly rotate on the frame 1.
In the embodiment, the second driving unit 3-1 is started, and the second driving unit 3-1 transmits power to the second driving roller 3-3 through the second driving gear mechanism 3-2 to drive the second driving roller 3-3 to rotate, so as to realize material distribution.
Referring to fig. 5, the multi-roller distributor further comprises: a third roller means 4.
The feed inlet of the third roller bed device 4 is communicated with the discharge outlet of the last roller bed device in the first roller bed devices 2, and the discharge outlet of the last roller bed device in the first roller bed devices 2 can transmit materials to the third roller bed device 4.
The third roller way device 4 comprises: a third driving unit 4-1, a third driving gear mechanism 4-2, a third driving roller 4-3, a second intermediate wheel 4-4, a second driven gear mechanism 4-5 and a third driven roller 4-6.
The fixed end of the third driving unit 4-1 is fixedly arranged on the frame 1, the action end of the third driving unit 4-1 is connected with the third driving gear mechanism 4-2, and the third driving gear mechanism 4-2 is connected with the third driving roller 4-3. In the present embodiment, the third driving gear mechanism 4-2 may have the same structure as the first driving gear mechanism 2-2.
The third drive roll 4-3 is rotatably arranged on the frame 1.
The second driven gear mechanism 4-5 is connected with the third driving gear mechanism 4-2 through a second intermediate wheel 4-4.
The second driven rollers 4-6 are rotatably provided on the frame 1.
The second driven roller 4-6 is connected with the second driven gear mechanism 4-5.
In the embodiment, the third driving unit 4-1 is started, the third driving unit 4-1 transmits power to the third driving gear mechanism 4-2, the third driving gear mechanism 4-2 transmits power to the third driving gear mechanism 4-2, meanwhile, the third driving gear mechanism 4-2 transmits power to the second driven gear mechanism 4-5 through the second intermediate gear 4-4, and the second driven gear mechanism 4-5 drives the third driven roller 4-6 to act, so that material distribution is realized.
The third driving roller 4-3 and the third driven roller 4-6 are arranged on the frame 1 through two third supporting bearings 4-7, so that the third driving roller 4-3 and the third driven roller 4-6 can smoothly rotate on the frame 1.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. A multiple roller distributor, comprising: the device comprises a rack and a plurality of first roller bed devices;
the first roller bed device comprises: the device comprises a first driving unit, a first driving gear mechanism, a first driving roller, two first idle wheels, two first driven gear mechanisms and two first driven rollers;
the fixed end of the first driving unit is fixedly arranged on the rack, the action end of the first driving unit is connected with the first driving gear mechanism, and the first driving gear mechanism is connected with the first driving roller;
the first driving roller is rotatably arranged on the rack, and the first driving roller is arranged between the two first driven rollers;
the two first idle wheels correspond to the two first driven gear mechanisms one by one, and the first driven gear mechanisms are connected with a first driving gear mechanism through the first idle wheels;
the two first driven rollers are rotatably arranged on the rack;
the two first driven rollers correspond to the two first driven gear mechanisms one by one, and the first driven rollers are connected with the corresponding first driven gear mechanisms.
2. The multi-roller distributor of claim 1, wherein said first drive unit further comprises: a driving motor, a speed reducer and an output shaft;
the input end of the speed reducer is connected with the action end of the driving motor, and the output end of the speed reducer is connected with the output shaft;
and the end part of the output shaft departing from the speed reducer is connected with the first driving gear mechanism.
3. The multi-roller distributor of claim 1, wherein the first drive gear mechanism comprises: the gear assembly comprises a driving gear, a first gear supporting bearing, a first connecting shaft and a second connecting shaft;
the driving gear is arranged on the rack through the first gear supporting bearing;
the first end of the first connecting shaft is connected with the action end of the first driving unit, and the second end of the first connecting shaft is fixedly connected with the driving gear;
the first end of the second connecting shaft is fixedly connected with the end part, deviating from the first connecting shaft, of the driving gear, and the second end of the second connecting shaft is connected with the first driving roller.
4. The multiple roller distributor of claim 1, wherein said first driven gear mechanism comprises: the driven gear, the second gear supporting bearing and the third connecting shaft;
the driven gear is arranged on the frame through the second gear supporting bearing;
the first end of the third connecting shaft is fixedly connected with the driven gear, and the third end of the second connecting shaft is connected with the first driven roller.
5. The multiple roller distributor of claim 1, wherein:
the first driving roller and the two first driven rollers are arranged on the rack through two first supporting bearings.
6. The multi-roller distributor of claim 1, further comprising: a second roller way device;
and the feed inlet of the second roller way device is communicated with the discharge outlet of the last first roller way device in the plurality of first roller way devices.
7. The multi-roller distributor of claim 6, wherein said second roller way means comprises: the second driving unit, the second driving gear mechanism and the second driving roller;
the fixed end of the second driving unit is fixedly arranged on the rack, and the action end of the second driving unit is connected with the second driving gear mechanism;
the second driving gear mechanism is connected with a second driving roller;
the second driving roller is rotatably arranged on the frame.
8. The multiple roller distributor of claim 7, wherein:
the second driving roller is arranged on the frame through two second supporting bearings.
9. The multi-roller distributor of claim 1, further comprising: a third roller way device;
the feed inlet of the third roller bed device is communicated with the discharge outlet of the last roller bed device in the plurality of first roller bed devices;
the third roller way device comprises: the third driving unit, a third driving gear mechanism, a third driving roller, a second intermediate wheel, a second driven gear mechanism and a third driven roller;
the fixed end of the third driving unit is fixedly arranged on the rack, the action end of the third driving unit is connected with the third driving gear mechanism, and the third driving gear mechanism is connected with the third driving roller;
the third driving roller is rotatably arranged on the frame;
the second driven gear mechanism is connected with a third driving gear mechanism through the second intermediate wheel;
the second driven roller is rotatably arranged on the rack;
the second driven roller is connected with the second driven gear mechanism.
10. The multi-roller distributor of claim 9, wherein:
the third driving roller and the two third driven rollers are arranged on the rack through two third supporting bearings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121156205.0U CN215556314U (en) | 2021-05-27 | 2021-05-27 | Multi-roller distributing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121156205.0U CN215556314U (en) | 2021-05-27 | 2021-05-27 | Multi-roller distributing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215556314U true CN215556314U (en) | 2022-01-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121156205.0U Active CN215556314U (en) | 2021-05-27 | 2021-05-27 | Multi-roller distributing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215556314U (en) |
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2021
- 2021-05-27 CN CN202121156205.0U patent/CN215556314U/en active Active
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