CN212197273U - Yellow sand quantitative conveying mechanism - Google Patents
Yellow sand quantitative conveying mechanism Download PDFInfo
- Publication number
- CN212197273U CN212197273U CN202020855039.2U CN202020855039U CN212197273U CN 212197273 U CN212197273 U CN 212197273U CN 202020855039 U CN202020855039 U CN 202020855039U CN 212197273 U CN212197273 U CN 212197273U
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- Prior art keywords
- discharging channel
- discharging
- conveying mechanism
- yellow sand
- barrel
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- 239000004576 sand Substances 0.000 title claims abstract description 36
- 239000000463 material Substances 0.000 claims abstract description 100
- 238000007599 discharging Methods 0.000 claims abstract description 78
- 238000005303 weighing Methods 0.000 claims abstract description 20
- 230000004888 barrier function Effects 0.000 claims description 15
- 230000000694 effects Effects 0.000 abstract description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 25
- 238000000034 method Methods 0.000 description 16
- 230000005540 biological transmission Effects 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model relates to a yellow sand ration conveying mechanism, including main storage bucket, main storage bucket passes through the support frame to be fixed aloft, main storage bucket upper surface is equipped with the feed inlet, be equipped with two discharging channel on the main storage bucket at least, the last subassembly of opening and close that is equipped with the outflow of control husky material of discharging channel, every discharging channel's below all is provided with the material receiving bucket that is used for receiving the material, it is equipped with the bin outlet, every to connect the material bucket lower surface the lower surface that connects the storage bucket all is equipped with the subassembly of weighing. The utility model discloses have the effect that effectively improves yellow sand ration transport efficiency.
Description
Technical Field
The utility model belongs to the technical field of yellow sand conveyor's technique and specifically relates to a yellow sand ration conveying mechanism is related to.
Background
The yellow sand is also called gravel and is granular solid, and the main component is silicon dioxide, so the yellow sand has stable chemical property, hard texture and good weather resistance. The yellow sand is mixed with cement, stones and the like to form concrete, and is widely applied to the construction industry. During the transportation and use of the yellow sand, quantitative transportation is often needed to adapt to different working conditions.
The prior Chinese utility model patent with the publication number of CN208498820U discloses a device for conveying and quantifying granules, which comprises a bracket, a material carrying barrel, a belt conveyor, a main material barrel and a weighing component, wherein a feed inlet of the belt conveyor is connected with the main material barrel, and a discharge channel of the belt conveyor is connected with the material carrying barrel; the upper end of the bracket is provided with a weighing component which is sleeved on the material carrying barrel; the upper end of the belt conveyor is provided with a cover plate which seals the upper end of the belt conveyor; the feed inlet of the belt conveyor is square, and the length of the feed inlet is not more than one fifth of the length of the working end of the belt conveyor; the belt conveyor is in a square round tube shape; the lower end of the working end of the belt conveyor is in a closed state; the belt conveyor has the advantages of low cost, large conveying capacity and suitability for application in various occasions, so that the feed port of the belt conveyor is square, does not exceed one fifth of the working end, and is stable and efficient.
The main material barrel is used for storing sand materials, the sand materials flow into the material loading barrel from the main material barrel, the weighing assembly is arranged below the material loading barrel, when a certain amount of sand materials are received in the material loading barrel, the discharging bin door below the main material barrel is closed firstly, and then the valve in the material loading barrel is opened to discharge the sand materials in the material loading barrel.
The above prior art solutions have the following drawbacks: because a main storage bucket only has been equipped with one and has carried the storage bucket, after carrying the storage bucket and weighing, at the in-process that carries the discharge of the sand material in the storage bucket through valve processing, the unloading door in the main storage bucket need be closed, waits for to carry the complete discharge of the sand material in the storage bucket and just can open the unloading door again and carry out the defeated material, and middle latency is longer, can only carry out the defeated material process of a year storage bucket once, has reduced quantitative conveying's efficiency.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a yellow sand ration conveying mechanism, it has the effect that conveying efficiency is high to the not enough of prior art existence.
The above technical purpose of the present invention can be achieved by the following technical solutions:
the utility model provides a yellow sand quantitative conveying mechanism, includes the main material bucket, the main material bucket passes through the support frame to be fixed aloft, the main material bucket upper surface is equipped with the feed inlet, be equipped with two discharging channel on the main material bucket at least, the last subassembly of opening and close that is equipped with the outflow of control husky material of discharging channel, every discharging channel's below all is provided with the material bucket that connects that is used for receiving the material, it is equipped with the bin outlet, every to connect the material bucket lower surface the lower surface that connects the material bucket all is equipped with the subassembly of weighing.
Through adopting above-mentioned technical scheme, at the defeated material in-process of husky material ration, utilize and open and close the subassembly and open a plurality of discharging channel simultaneously, fail a plurality of receipts storage bucket simultaneously, when the volume that the subassembly detected husky material of weighing reaches the requirement, utilize and open and close the subassembly and close a plurality of discharging channel simultaneously, the bin outlet is beaten to the discharge valve of meanwhile operation, connect the storage bucket to begin to arrange the row through advancing the bin outlet, treat that the husky material in a plurality of receipts storage buckets discharges completely, repeat above-mentioned operation, carry out the husky material ration transportation process of next round, this kind of mode once only can fail a plurality of receipts storage buckets, the ration delivery volume of husky material in the unit interval greatly improves, the effectual ration efficiency that has improved.
The present invention may be further configured in a preferred embodiment as: the bottom of each receiving barrel is funnel-shaped.
Through adopting above-mentioned technical scheme for connect the interior husky material's of storage bucket discharge rate, reduced latency, and then improved quantitative conveying's efficiency.
The present invention may be further configured in a preferred embodiment as: a circulating structure is arranged below the weighing component, the circulating structure comprises an annular inner rail arranged below the main material barrel, an annular outer rail arranged on the outer ring of the inner rail and a moving vehicle movably arranged on the inner rail and the outer rail, the distances between the inner rail and the outer rail are always the same, and the moving vehicle is provided with a driving component for driving the moving vehicle to move; the main material barrel is located at one end of the inner track inner ring in the length direction, and the discharge channels are uniformly distributed on the outer side wall of the main material barrel in a circumferential shape.
Through adopting above-mentioned technical scheme, after receiving a certain amount of husky material in connecing the storage bucket, start earlier and open the subassembly, seal discharging channel, then start drive assembly, drive the locomotive and move along interior track and outer track, and then drive the subassembly of weighing and receive the material bucket that connects that the completion leaves discharging channel's position, a plurality of material buckets that connect that next batch of correspondence circulate to discharging channel's below, the subassembly is opened discharging channel to the utilization is opened and close this moment, can carry out the work of connecing of a plurality of material buckets of next batch, the material bucket that connects of dress material moves to other positions and arranges the material process, should set for will arrange the material process and cut apart into two processes with the discharging process, mutual noninterference, the latency who connects the material bucket to arrange the material has been saved, the efficiency of quantitative conveying has greatly been improved.
The present invention may be further configured in a preferred embodiment as: the bottom surface of the main charging basket is provided with bulges from the periphery to the center.
Through adopting above-mentioned technical scheme for when discharging channel opened, the material can be more quick fall from discharging channel, increases the load in the unit interval under the unchangeable circumstances of discharging channel area, has improved the efficiency that the ration was carried.
The present invention may be further configured in a preferred embodiment as: the discharging channel is obliquely arranged, and the height of one end, far away from the main charging basket, of the discharging channel is lower than that of the other end of the discharging channel.
Through adopting above-mentioned technical scheme, further improve the speed of husky material ejection of compact, avoid husky material to block up and then influence the smoothness nature of the ejection of compact in discharging channel, improved the efficiency of the ejection of compact, and then improve the efficiency that husky material ration was carried.
The present invention may be further configured in a preferred embodiment as: the opening and closing assembly comprises a telescopic cylinder arranged on the upper surface of the discharging channel and a stop plate arranged at the end part of a piston rod of the telescopic cylinder, the stop plate penetrates through the upper surface of the discharging channel, and the height of the stop plate is greater than or equal to the vertical height of the discharging channel.
By adopting the technical scheme, the structure of the opening and closing assembly is provided, when the opening and closing assembly is used, if the discharge channel needs to be closed, only the telescopic cylinder needs to be started, and the telescopic cylinder drives the stop plate to move, so that the discharge channel is blocked; the step of opening discharging channel is opposite to that of closing, and the opening and closing assembly is simple in structure and simple to control.
The present invention may be further configured in a preferred embodiment as: open and close the subassembly including setting up at the servo motor of discharging channel side, setting up pivot and the fixed barrier plate of establishing on the pivot lateral wall of servo motor output shaft tip, the pivot runs through discharging channel length direction both sides face setting, the shape size of barrier plate is the same with discharging channel's vertical cross-section.
Through adopting above-mentioned technical scheme, another kind of structure of opening and close the subassembly is provided, this kind of opening and close the subassembly when using, if need close discharging channel, start servo motor, servo motor drives the pivot and rotates, and then drives the baffler and rotate, and finally the inside top surface butt of the up end discharging channel of baffler, and then seals discharging channel, and this kind of mode makes to open and close the subassembly can control discharging channel discharging rate's speed, and then the use is more nimble.
The present invention may be further configured in a preferred embodiment as: the bottom surface of the discharge channel is provided with a through groove, the stop plate is matched with the through groove in a clamping manner, and the through groove is positioned above the corresponding material receiving barrel.
Through adopting above-mentioned technical scheme, when telescopic cylinder drives the barrier plate and plugs up discharging channel, improved the stability of being connected between barrier plate and the discharging channel, avoid husky material to break away the barrier plate, guarantee the security among the quantitative conveying process.
To sum up, the utility model discloses a following at least one useful technological effect:
1. the quantitative conveying device has the advantages that the plurality of discharging channels are arranged on the main material barrel, the plurality of receiving barrels are arranged corresponding to the plurality of discharging channels, quantitative conveying is carried out on the plurality of receiving barrels at one time, so that the conveying amount in unit time is increased, and the quantitative conveying efficiency is improved;
2. establish to hopper-shaped and set up circulation mechanism in connecing the storage bucket bottom through connecing storage bucket bottom for the row's of connecing the storage bucket expects the process mutually independent with the defeated material process of main storage bucket, and mutual noninterference has reduced the row's of connecing the storage bucket material time, and then has improved the defeated efficiency of material of ration.
Drawings
FIG. 1 is a schematic view showing the overall structure of a quantitative transfer mechanism according to a first embodiment;
FIG. 2 is a schematic diagram mainly illustrating a driving assembly in the first embodiment;
FIG. 3 is a front view of FIG. 2;
FIG. 4 is a schematic view illustrating an opening and closing assembly according to the first embodiment;
fig. 5 is a partially enlarged view of a portion a in fig. 4;
FIG. 6 is a schematic view showing the opening and closing member according to the second embodiment;
fig. 7 is a partially enlarged view of a portion B in fig. 6.
In the figure, 1, a main material barrel; 2. a support frame; 3. a feed inlet; 4. a discharge channel; 5. an opening and closing assembly; 51. a telescopic cylinder; 52. a blocking plate; 53. a servo motor; 54. a rotating shaft; 55. a barrier plate; 6. a receiving barrel; 7. a discharge outlet; 8. a discharge valve; 9. a weighing assembly; 91. a weighing sensor; 92. a support plate; 10. a circulating mechanism; 101. an inner rail; 102. an outer rail; 103. a mobile vehicle; 1031. a universal roller; 11. a drive assembly; 111. a first driven gear; 112. a second driven gear; 113. a drive chain; 114. a drive motor; 115. a driving gear; 12. a through groove; 13. a fixed shaft; 14. a bearing; 15. connecting columns; 16. a support bar; 17. a protrusion; 18. and (4) a bracket.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example one
Referring to fig. 1, for the utility model discloses a yellow sand quantitative conveying mechanism, including cylindric main storage bucket 1, the lateral wall of main storage bucket 1 is equipped with four root class L shape support frames 2, the one end and the ground fixed connection of support frame 2, the support frame 2 other end and the welding of the circumference lateral wall of main storage bucket 1, and main storage bucket 1 passes through support frame 2 to be fixed aloft, is equipped with feed inlet 3 at 1 upper surface of main storage bucket.
Referring to fig. 1, a plurality of discharging channels 4 are arranged on the circumferential side wall of the main material barrel 1, in this embodiment, three discharging channels 4 are specifically arranged, an included angle between the centers of two adjacent discharging channels 4 and the horizontal line of the axis of the main material barrel 1 is ninety degrees, and a material receiving barrel 6 for receiving material is arranged below each discharging channel 4.
Referring to fig. 1, a circulation mechanism 10 is disposed below a main material bucket 1, the circulation mechanism 10 includes an annular inner rail 101 horizontally and fixedly connected to the ground, an annular outer rail 102 fixedly connected to the ground and located at an outer ring of the inner rail 101, and a plurality of traveling vehicles 103 movably connected above the inner rail 101 and the outer rail 102, and a distance between the inner rail 101 and the outer rail 102 is always the same. Specifically referring to fig. 3, four universal rollers 1031 are disposed on the lower surface of each moving vehicle 103, the moving vehicle 103 circularly moves above the annular inner rail 101 and the annular outer rail 102 via the universal rollers 1031, and the moving vehicle 103 is provided with a driving assembly 11 for driving the moving vehicle 103 to move.
Referring to fig. 2, the driving assembly 11 includes a first driven gear 111 vertically rotatably disposed on the ground at one end of the inner race 101 in the length direction of the inner race, a second driven gear 112 vertically rotatably disposed on the ground at the other end of the inner race 101 in the length direction of the inner race, a transmission chain 113 engaged with the outer rings of the first driven gear 111 and the second driven gear 112, a driving motor 114 disposed on one side of the first driven gear 111, and a driving gear 115 disposed at an output shaft end of the driving motor 114, wherein an output shaft of the driving motor 114 is disposed vertically upward, and the driving gear 115 is engaged with the first driven gear 111. Specifically, the first driven gear 111 rotates, that is, a fixed shaft 13 is fixedly connected to the ground, a bearing 14 is disposed on an outer side wall of an upper end of the fixed shaft 13, and the gear rotates on the upper end of the fixed shaft 13 through the bearing 14.
Referring to fig. 3, a weighing assembly 9 is arranged on the upper surface of the moving vehicle 103, the weighing assembly 9 includes a weighing sensor 91 arranged at the center of the upper surface of the moving vehicle 103 and a bearing plate 92 arranged above the weighing sensor 91, the weighing sensor 91 is a piezoelectric weighing sensor 91, the material receiving barrel 6 is fixedly connected to the upper surface of the bearing plate 92, specifically, the material receiving barrel 6 is cylindrical, the bottom of the material receiving barrel 6 is funnel-shaped, and the bottom surface of the material receiving barrel 6 is fixedly connected to the upper surface of the bearing plate 92 through four support rods 16. The bottom end of the material receiving barrel 6 is provided with a discharge hole 7, and the discharge hole 7 is provided with a discharge valve 8. The upper surface of each supporting plate 92 is located below the transmission chain 113 and is fixedly connected with a connecting column 15, and the top surface of each connecting column 15 is fixedly connected with the bottom surface of the transmission chain 113.
Referring to fig. 4 and 5, the main charging bucket 1 is provided with a protrusion 17 from the periphery to the center, the discharging channel 4 is provided with an opening and closing assembly 5 for controlling the sand to flow out, the opening and closing assembly 5 comprises a telescopic cylinder 51 arranged on the upper surface of the discharging channel 4 and a barrier plate 52 fixedly connected to the end part of a piston rod of the telescopic cylinder 51, and the upper surface and the lower surface of the discharging channel 4 are both provided with a through groove 12 for the barrier plate 52 to run through. The upper surface of the discharging channel 4 is provided with a bracket 18, the cylinder body of the telescopic cylinder 51 is vertically and fixedly connected to the upper surface of the bracket 18, and the piston rod of the telescopic cylinder 51 penetrates through the upper surface of the bracket 18 and is vertically arranged downwards.
The implementation principle of the embodiment is as follows: the initial state of the discharge channel 4 is a closed state, sand is infused into the main material barrel 1 from the main material barrel 1, after a certain amount of sand is stored in the main material barrel 1, the opening and closing assembly 5 is operated to open the discharge channel 4, specifically, the telescopic cylinder 51 is started first to drive the barrier plate 52 to vertically move upwards, so that the discharge channel 4 can be opened, the sand falls into the material receiving barrel 6 below through the discharge channel 4 and the through groove 12 on the bottom surface of the discharge channel 4, and at the moment, the discharge valve 8 is in a closed state;
after receiving a certain amount of sand in the material receiving buckets 6, firstly operating the opening and closing assembly 5 to close the material discharging channel 4, then starting the driving assembly 11 to drive the moving vehicle 103 to slide along the inner rail 101, specifically starting the driving motor 114, wherein the driving motor 114 drives the driving gear 115 to rotate, and further drives the first driven gear 111 to rotate, and further drives the transmission chain 113 to rotate, so that the connecting column 15 performs a circulating motion along the inner rail 101, and further drives the weighing assembly 9 and the material receiving buckets 6 which have received the sand to leave the position of the material discharging channel 4, at the moment, a next batch of corresponding material receiving buckets 6 circulate to the lower part of the material discharging channel 4, and then opening the material discharging channel 4 by using the opening and closing assembly 5, so that the material receiving work of the next batch of material receiving buckets 6 can be performed;
the material receiving barrel 6 filled with the materials is moved to other positions for discharging, the discharging valve 8 is opened, and the sand materials are discharged from the discharging opening 7. The discharging and discharging process is divided into two processes which are not interfered with each other, so that the waiting time for discharging materials from the material receiving barrel 6 is saved, and the efficiency of quantitative material conveying is greatly improved.
Example two
Referring to fig. 6 and 7, the difference from the first embodiment is that the opening and closing assembly 5 includes a servo motor 53 disposed on the side surface of the discharging channel 4, a rotating shaft 54 fixedly connected to the end of the output shaft of the servo motor 53, and a blocking plate 55 fixedly sleeved on the outer side wall of the rotating shaft 54, the rotating shaft 54 is disposed through the two side surfaces of the discharging channel 4 in the length direction, and the shape of the blocking plate 55 is the same as the cross section perpendicular to the length direction of the discharging channel 4.
The implementation principle of the embodiment is as follows: if discharging channel 4 needs to be closed, servo motor 53 is started, servo motor 53 drives rotating shaft 54 to rotate, and then drives separation plate 55 to rotate, and finally the up end and the lower terminal surface of separation plate 55 respectively with the inside butt of discharging channel 4, and then close discharging channel 4, the opening process is opposite to the closing process.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (8)
1. The utility model provides a yellow sand ration conveying mechanism, includes main storage bucket (1), main storage bucket (1) is fixed aloft through support frame (2), main storage bucket (1) upper surface is equipped with feed inlet (3), its characterized in that: at least two discharging channels (4) are arranged on the main charging basket (1), an opening and closing assembly (5) for controlling the sand to flow out is arranged on each discharging channel (4), a material receiving barrel (6) for receiving the material is arranged below each discharging channel (4), a discharging opening (7) is arranged on the lower surface of each material receiving barrel (6), a discharging valve (8) for controlling the sand to flow out is arranged on each discharging opening (7), and each weighing assembly (9) is arranged on the lower surface of each material receiving barrel (6).
2. The quantitative yellow sand conveying mechanism according to claim 1, wherein: the bottom of each receiving barrel (6) is funnel-shaped.
3. The quantitative yellow sand conveying mechanism according to claim 1, wherein: a circulating mechanism (10) is arranged below the weighing component (9), the circulating mechanism (10) comprises an annular inner track (101) arranged below the main material barrel (1), an annular outer track (102) arranged on the outer ring of the inner track (101) and a moving vehicle (103) movably arranged on the inner track (101) and the outer track (102), the distance between the inner track (101) and the outer track (102) is always the same, and the moving vehicle (103) is provided with a driving component (11) for driving the moving vehicle (103) to move; the main charging barrel (1) is located at one end of the inner ring of the inner rail (101) in the length direction, and the discharging channels (4) are uniformly distributed on the outer side wall of the main charging barrel (1) in a circumferential manner.
4. The quantitative yellow sand conveying mechanism according to claim 1, wherein: the bottom surface of the main charging basket (1) is provided with a bulge (17) from the periphery to the center.
5. The quantitative yellow sand conveying mechanism according to claim 1, wherein: the discharging channel (4) is obliquely arranged, and the height of one end, far away from the main charging basket (1), of the discharging channel (4) is lower than that of the other end of the discharging channel.
6. The quantitative yellow sand conveying mechanism according to claim 1, wherein: open and close subassembly (5) including setting up telescopic cylinder (51) at discharging channel (4) upper surface and setting up barrier plate (52) at telescopic cylinder (51) piston rod tip, barrier plate (52) run through the upper surface setting of discharging channel (4), the vertical height of highly more than or equal to discharging channel (4) of barrier plate (52).
7. The quantitative yellow sand conveying mechanism according to claim 1, wherein: open and close subassembly (5) including setting up servo motor (53) in discharging channel (4) side, setting up pivot (54) and the fixed barrier plate (55) of establishing on pivot (54) lateral wall at servo motor (53) output shaft tip, pivot (54) run through discharging channel (4) length direction both sides face setting, the shape size of barrier plate (55) is the same with the vertical cross-section of discharging channel (4).
8. The quantitative yellow sand conveying mechanism according to claim 6, wherein: through groove (12) have been seted up to the bottom surface of discharging channel (4), barrier plate (52) and through groove (12) joint cooperation, through groove (12) are located the vertical top of the material receiving bucket (6) that corresponds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020855039.2U CN212197273U (en) | 2020-05-20 | 2020-05-20 | Yellow sand quantitative conveying mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020855039.2U CN212197273U (en) | 2020-05-20 | 2020-05-20 | Yellow sand quantitative conveying mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212197273U true CN212197273U (en) | 2020-12-22 |
Family
ID=73817265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020855039.2U Expired - Fee Related CN212197273U (en) | 2020-05-20 | 2020-05-20 | Yellow sand quantitative conveying mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212197273U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112704907A (en) * | 2020-12-29 | 2021-04-27 | 石家庄正道动物药业有限公司 | Continuous traditional Chinese medicine extraction and concentration system and working method thereof |
| CN113577334A (en) * | 2021-08-04 | 2021-11-02 | 广东亚北农副产品有限公司 | Pueraria freeze-dried powder raw material pre-disinfection device and using method thereof |
-
2020
- 2020-05-20 CN CN202020855039.2U patent/CN212197273U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112704907A (en) * | 2020-12-29 | 2021-04-27 | 石家庄正道动物药业有限公司 | Continuous traditional Chinese medicine extraction and concentration system and working method thereof |
| CN113577334A (en) * | 2021-08-04 | 2021-11-02 | 广东亚北农副产品有限公司 | Pueraria freeze-dried powder raw material pre-disinfection device and using method thereof |
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Granted publication date: 20201222 |