CN104429408A - Gain filling anti-deviation device for granary and granary provided with same - Google Patents
Gain filling anti-deviation device for granary and granary provided with same Download PDFInfo
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- CN104429408A CN104429408A CN201410713606.XA CN201410713606A CN104429408A CN 104429408 A CN104429408 A CN 104429408A CN 201410713606 A CN201410713606 A CN 201410713606A CN 104429408 A CN104429408 A CN 104429408A
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- grain
- silo
- baffle plate
- bin device
- bias bin
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Abstract
The invention discloses a grain filling anti-deviation device for a granary and the granary provided with the same and belongs to the technical field of granaries. The grain filling anti-deviation device comprises a bearing frame and multiple baffles, wherein the upper ends of the multiple baffles are hinged to the bearing frame, and the multiple baffles form a funnel shape provided with an opening at the lower end in an enclosure mode. The grain filling anti-deviation device further comprises a linkage mechanism for adjusting the opening degrees of the multiple baffles. After grains are filled into the device, the linkage mechanism adjusts the opening degrees of the multiple baffles according to grain flows so that the balance between the grain filling amount in the device and the output amount can be ensured regardless of the grain flows, and vertically-dropping grain flows can form relatively flat grain face by being evenly dispersed through a grain disperser. The linkage mechanism of the grain filling anti-deviation device plays a grain flow buffering and stabilizing role when the grains are filled into the granary, the grain face flatness after filling operation is improved, and the grain deviation degree in the granary can be effectively reduced.
Description
Technical field
The present invention relates to silo technical field, refer to that a kind of silo is noted the anti-bias bin device of grain and had the silo of this device especially.
Background technology
Current domestic large-scale food storage is main mainly with silo, vertical silo, and these two kinds of storehouse types have that floor space is relatively little, storage capacity is large, mechanization degree advantages of higher, but also there is obvious shortcoming: the top due to these two kinds of storehouse types is all designed to a grain inlet and enters grain to carry out mechanization, the distance of grain inlet distance at the bottom of storehouse reaches tens of rice, when carrying out conveying grain into storehouse operation, grain fall into position at the bottom of storehouse just relatively concentrate or relatively more fixing one among a small circle in, grain and various impurity will be caused to produce automatic classification when falling and roll behind the storehouse that falls, thus cause various different accumulation of impurities in specific region, it is extremely uneven that such Nesting Zone causes grain to pile each region voidage, the aeration-cooling and stifling of grain can be affected, thus seriously govern the storage security of grain.
At present, the settling mode adopted installs various forms of grain distributer in the below of grain inlet, and drop point scope when expanding conveying grain into storehouse by the rotation of grain distributer, accomplishes even cloth grain as much as possible.Grain distributer is all the below being directly installed on silo top grain inlet, and in the course of work of carrying out conveying grain into storehouse, when conveying plant sends grain to grain inlet, the grain be transferred can fall to entering grain distributer from grain inlet.At present, there is a more general problem in this mode, after cloth grain completes, namely occurred significantly inclined storehouse situation.This also directly causes, after grain distributer completes cloth grain work of putting in storage, also needing manpower to carry out a large amount of work of closing a position, thus reducing the integrated automation degree of cloth grain system, had a strong impact on grain distributer product applying on silo and vertical silo.
Summary of the invention
The invention provides a kind of silo that effectively can reduce grain inclined storehouse degree to note the anti-bias bin device of grain and there is the silo of this device.
For solving the problems of the technologies described above, the invention provides technical scheme as follows:
The anti-bias bin device of a kind of silo note grain, comprise heavy frame and multiple baffle plate, the upper end thereof of described multiple baffle plate is on described heavy frame, described multiple baffle plate surrounds the infundibulate that lower end has opening, and the anti-bias bin device of described silo note grain also comprises the interlinked mechanism for regulating described multiple baffle opening.
Further, described interlinked mechanism comprises the bearing beam be arranged on above described multiple baffle plate, the centre of described bearing beam is provided with fixed axis, described fixed axis is arranged with flexible member and gusset piece, the upper end of described flexible member is fixed on described fixed axis, the lower end of described flexible member connects described gusset piece, and described gusset piece is hinged with multiple connecting rod, and the end of described multiple connecting rod is hinged on described multiple baffle plate respectively.
Further, described fixed axis is provided with Cone Disc above described flexible member.
Further, described interlinked mechanism comprises the bearing beam be arranged on above described multiple baffle plate, each baffle plate is hinged with respectively a connecting rod, and the end of described connecting rod connects described bearing beam respectively by flexible member.
Further, the performance element that described interlinked mechanism comprises the sensor for detecting baffle opening and is connected with described sensor for driving baffle plate, described sensor is angular transducer, displacement transducer or force snesor.
Further, described heavy frame is provided with the limit element for defining baffle aperture.
Further, the anti-bias bin device of described silo note grain also comprises housing, described housing comprises upper surface flange, lower surface flange and the chamber wall between described upper surface flange and lower surface flange, described heavy frame is arranged on the inwall of described chamber wall, and described bearing beam is arranged on the top of described upper surface flange.
Further, described heavy frame is rectangle, and described baffle plate is 4 pieces, is hinged on respectively on 4 limits of described rectangle.
A kind of silo, there is grain inlet the upper end of described silo, and described silo inside is provided with grain distributer in the below of described grain inlet, is provided with the anti-bias bin device of above-mentioned silo note grain between described grain inlet and grain distributer.
Further, the central axis coaxial of the central axis of the anti-bias bin device of described silo note grain and the crop inlet pipe of described grain distributer, described silo is silo or vertical silo.
The present invention has following beneficial effect:
Compared with prior art, the anti-bias bin device of silo note grain of the present invention, during use, this device is arranged between grain inlet and grain distributer, after grain injects this device, interlinked mechanism regulates the size of the aperture of multiple baffle plate according to grain stream, so no matter grain stream size, can ensure that grain injection rate in this device and output quantity reach balance, ensure that grain stream enters grain distributer with the motion mode of vertical drop, avoid grain and form an initial velocity in the horizontal direction while whereabouts, the even cloth that the grain of vertical drop flows through grain distributer spills and just can form more smooth grain face.The present invention plays buffering and the effect of stable grain stream when grain loads silo, improves the flatness in grain face after operation of putting in storage, effectively can reduce the degree in the inclined storehouse of grain.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the anti-bias bin device of silo of the present invention note grain;
Fig. 2 is the plan structure schematic diagram of the anti-bias bin device of silo of the present invention note grain;
Fig. 3 is the sectional structure schematic diagram of the anti-bias bin device of silo of the present invention note grain.
Embodiment
For making the technical problem to be solved in the present invention, technical scheme and advantage clearly, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
On the one hand, the invention provides the anti-bias bin device of a kind of silo note grain, as shown in Figure 1 to Figure 3, comprise heavy frame 2 and multiple baffle plate 3, the upper end thereof of multiple baffle plate 3 is on heavy frame 2, multiple baffle plate 3 surrounds the infundibulate that lower end has opening, and the anti-bias bin device of silo note grain also comprises the interlinked mechanism for regulating multiple baffle opening.
Inventor finds through further investigation, occur in prior art that the reason in inclined storehouse is: because grain distributer is all the below being directly installed on silo top grain inlet, in the course of work of carrying out conveying grain into storehouse, when conveying plant sends grain to grain inlet with certain speed, the grain be transferred also can form an initial velocity roughly in the same way in the horizontal direction while whereabouts, like this when grain is arrived after in storehouse by grain distributer, just there will be the inclined storehouse phenomenon that higher one side is lower.To this, inventor spy have developed the anti-bias bin device of silo of the present invention note grain.
Compared with prior art, the anti-bias bin device of silo note grain of the present invention, during use, this device is arranged between grain inlet and grain distributer, after grain injects this device, interlinked mechanism regulates the size of the aperture of multiple baffle plate according to grain stream, so no matter grain stream size, can ensure that grain injection rate in this device and output quantity reach balance, ensure that grain stream enters grain distributer with the motion mode of vertical drop, avoid grain and form an initial velocity in the horizontal direction while whereabouts, the even cloth that the grain of vertical drop flows through grain distributer spills and just can form more smooth grain face.The present invention plays buffering and the effect of stable grain stream when grain loads silo, improves the flatness in grain face after operation of putting in storage, effectively can reduce the degree in the inclined storehouse of grain.
As a modification of the present invention, preferably, as shown in Figure 2 to Figure 3, interlinked mechanism 4 comprises the bearing beam 5 be arranged on above multiple baffle plate 3, and the centre of bearing beam 5 is provided with fixed axis 6, fixed axis 6 is arranged with flexible member 8 and gusset piece 9, the upper end of flexible member 8 is fixed on fixed axis 6, the lower end of flexible member connects gusset piece 9, and gusset piece 9 is hinged with multiple connecting rod 10, the end of multiple connecting rod 10 is hinged on multiple baffle plate 3 respectively.
This structure is simple, does not have the parts of easy loss, also effectively can reduce the degree in the inclined storehouse of grain.When grain drops on baffle plate, because flexible member is to the effect of the restoring force of gusset piece, certain grain can be produced assemble in this device, when grain flow is less, the pressure that baffle plate bears is less, and baffle plate is just little to the active force of connecting rod, connecting rod drives gusset piece less along the distance of fixed axis slide downward, the angle that every root connecting rod rotates relative to fixed axis is less, and the aperture of baffle plate entirety is also less, and the grain piled up vertically is fallen uniformly by centre bore and identical edge slot; When grain stream is larger, the grain assembled in device increases, the pressure causing baffle plate to bear becomes large, baffle plate also becomes large to the pulling force of connecting rod, the distance that connecting plate moves down along fixed axis increases, and every root connecting rod becomes large relative to the angle that fixed axis rotates, and the overall aperture of baffle plate increases, grain whereabouts flow increases, thus realizes the injection of this device and input grain flow reaching balance.The even cloth that the grain of vertical drop flows through grain distributer spills and just can form more smooth grain face.During specific design, flexible member can use spring.Certainly, spring also can be directly used to connect bearing beam and baffle plate.
Further, as shown in Figure 2 to Figure 3, fixed axis 6 is preferably provided with Cone Disc 7 above flexible member 8.The effect of buffering grain stream and a fraction grain can be played like this; and Cone Disc is when can block enough greatly flexible member, gusset piece and connecting rod; Cone Disc can also play the effect of protection flexible member, gusset piece and connecting rod; Cone Disc can cushion the impulsive force of grain to baffle plate; thus the impulsive force that reduction baffle plate is subject to; flexible member, gusset piece and the connecting rod that can reduce like this by Cone Disc blocks says that I weares and teares; when avoiding grain stream larger; comparatively large to the impulsive force of baffle plate, each component wear of interlinked mechanism is serious.
As another improvement of the present invention, interlinked mechanism can comprise the bearing beam be arranged on above multiple baffle plate, and each baffle plate can be hinged with a connecting rod respectively, and the end of connecting rod connects bearing beam preferably by flexible member respectively.This structure is simpler, is easy to the regulating action realizing link gear.When grain drops on baffle plate, when grain flow is less, the pressure that baffle plate is subject to is also less, and the active force of baffle plate to connecting rod is less, and connecting rod pulls the power of flexible member also less, bearing beam pulls the reaction force of baffle plate also less by flexible member, the aperture of such baffle plate is also less, otherwise, when grain flow is larger, bearing beam pulls the reaction force of baffle plate comparatively large by flexible member, and baffle opening is also larger.
In specific implementation process, the top of flexible member can also be provided with Cone Disc; Flexible member is wherein spring, also can directly use spring to substitute connecting rod, and the two ends of spring are separately fixed on bearing beam and baffle plate.
Improve as another kind of the present invention, the performance element for driving baffle plate 3 that interlinked mechanism can also comprise the sensor for detecting baffle plate 3 aperture and be connected with sensor, sensor can be angular transducer, displacement transducer or force snesor.When grain is fallen on baffle plate, angular transducer, displacement transducer or force snesor can detect angle that baffle plate rotates due to the active force of grain, the displacement of generation or stressed size, the aperture of the result regulating fender that performance element detects according to angular transducer, displacement transducer or force snesor.
Certainly, interlinked mechanism, except the above-mentioned three kinds of structures of employing, can also adopt other structures that those skilled in the art easily expect, repeat no more herein.
Further, heavy frame 2 can also be provided with the limit element (not shown) for defining baffle 3 aperture.Limit element can rotate by defining baffle 3 in certain angle.Baffle plate and interlinked mechanism are installed to after on suitable position, use limit element to be fixed on heavy frame by baffle plate, for baffle plate, to provide upwards spacing and spacing when heavy frame rotates.Concrete embodiment is: limit element selects a screw, and screw number is eight.
In order to reduce the loss of miscellaneous part, ensure the present invention's operation reliably and with long-term.As shown in Figure 1 to Figure 3, the anti-bias bin device of silo note grain can also comprise housing 1, housing 1 preferably includes upper surface flange, lower surface flange and the chamber wall between upper surface flange and lower surface flange, heavy frame 2 is arranged on the inwall of chamber wall, and bearing beam 5 is preferably arranged on the top of upper surface flange.Concrete, upper surface flange and form taper contraction section respectively between lower surface flange and chamber wall, upper surface flange and grain inlet place device are bolted, lower surface Flange joint leads to the device of grain distributer, wherein two relative inwalls are being in the through hole conplane height had for tightening screw, four through holes on each side.
In the present invention, preferably, heavy frame is rectangle, and baffle plate is 4 pieces, is hinged on 4 limits of rectangle respectively; Certainly, heavy frame 2 also can be other shapes such as triangle, circle, corresponding, the number needs of baffle plate 3 will change according to the shape of heavy frame 2.Further, between adjacent two baffle plates, backgauge cloth (not shown) can be connected with, or overlap at adjacent two baffle plates of the lower end of baffle plate.When grain stream can be avoided so larger, grain drops from the space between two baffle plates in a large number, affects the result of use of this device.
Concrete, a kind of embodiment of heavy frame is as follows, and heavy frame comprises two groups of round steel with diameter, totally four, the end face circle center of four round steel axis is all drilled with the screwed hole of certain depth, and the position that two longer round steel are radial certain is drilled with two respectively near the through hole of end.Such four round steel couple together by boring screw that just can be spliced into centre be foursquare structure, the foursquare four edges surrounded cuts certain thickness at grade, form four and be in conplane rectangle facet, can be convenient to like this baffle plate loaded heavy frame or unload from it.Four facets after cutting respectively bore two tapped through holes totally eight through holes near right angle portion.Four screw holes on two round steel end faces longer in heavy frame are corresponding with four through holes of housing side to be installed, by screw-driving and level be arranged on the inwall of chamber wall.A kind of embodiment of baffle plate is as follows: the stainless steel cone-plate of baffle plate to be drift angle be arc-shaped, curve internal diameter at one edge break be the pipe closed of the non-fully more bigger than the diameter of round steel and cut the mounting hole site being applicable to placing damping element at pipe position, two spacing hole positions being used for mounting limit device are cut at its two-end part, the angle relatively folding pipe changes into fillet with larger radius, and four pieces of baffle plates are arranged on heavy frame by the angular slope that can roughly close.
On the other hand, the present invention also provides a kind of silo, and there is grain inlet the upper end of silo, and silo inside is provided with grain distributer in the below of described grain inlet, is provided with the anti-bias bin device of above-mentioned silo note grain between grain inlet and grain distributer.Concrete structure and the course of work the same, repeat no more herein.
Further, the central axis of silo note grain anti-bias bin device preferably with the central axis coaxial of the crop inlet pipe of grain distributer.The grain stream that this structure not only can make to drop on each baffle plate is impartial, and each dam forces is impartial, avoids grain stream that part baffle plate falls into comparatively large, the service life of impairment baffle plate, and can ensure that grain stream drops with the forms of motion of vertical drop.Concrete, the central axis and the grain distributer crop inlet pipe central axis that adjust the anti-bias bin device of silo note grain are when mounted concentric relation, install and grain stream that buffering enters can be played after adjusting to the right place and regulate the direction of motion of grain stream to be the forms of motion of vertical drop, simultaneously can carry out adaptive aperture adjustment along with the size of grain stream, thus completing smoothly of ensureing that mechanization cloth grain puts in storage.
The present invention is applicable to various silo, is specially adapted to silo or vertical silo.
To sum up, the present invention has the following advantages:
1, structure is simple, easy to manufacture, does not need to consume additional energy source, and cost is lower, can extensively promote the use of;
2, be installed on after on grain distributer, use interlinked mechanism controllable register aperture, effectively can reduce the degree in the inclined storehouse of grain, improve the flatness in grain face after operation of putting in storage, reduce the workload of closing a position into the laggard pedestrian's work of grain, effectively can reduce the overall use cost of cloth grain system;
3, highly versatile, various grain distributer all can be installed and used by after the suitable adjusted design of interface size;
4, install and dismantle all than being easier to, maintenance is convenient, without the parts of easy loss, can run stably in a long term.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from principle of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. the anti-bias bin device of silo note grain, it is characterized in that, comprise heavy frame and multiple baffle plate, the upper end thereof of described multiple baffle plate is on described heavy frame, described multiple baffle plate surrounds the infundibulate that lower end has opening, and the anti-bias bin device of described silo note grain also comprises the interlinked mechanism for regulating described multiple baffle opening.
2. the anti-bias bin device of silo note grain according to claim 1, it is characterized in that, described interlinked mechanism comprises the bearing beam be arranged on above described multiple baffle plate, the centre of described bearing beam is provided with fixed axis, described fixed axis is arranged with flexible member and gusset piece, the upper end of described flexible member is fixed on described fixed axis, the lower end of described flexible member connects described gusset piece, described gusset piece is hinged with multiple connecting rod, and the end of described multiple connecting rod is hinged on described multiple baffle plate respectively.
3. the anti-bias bin device of silo note grain according to claim 2, is characterized in that, described fixed axis is provided with Cone Disc above described flexible member.
4. the anti-bias bin device of silo note grain according to claim 1, it is characterized in that, described interlinked mechanism comprises the bearing beam be arranged on above described multiple baffle plate, each baffle plate is hinged with respectively a connecting rod, and the end of described connecting rod connects described bearing beam respectively by flexible member.
5. the anti-bias bin device of silo note grain according to claim 1, it is characterized in that, the performance element that described interlinked mechanism comprises the sensor for detecting baffle opening and is connected with described sensor for driving baffle plate, described sensor is angular transducer, displacement transducer or force snesor.
6. the anti-bias bin device of silo note grain according to claim 1, is characterized in that, described heavy frame is provided with the limit element for defining baffle aperture.
7. the anti-bias bin device of silo note grain according to claim arbitrary in claim 1 to 6, it is characterized in that, the anti-bias bin device of described silo note grain also comprises housing, described housing comprises upper surface flange, lower surface flange and the chamber wall between described upper surface flange and lower surface flange, described heavy frame is arranged on the inwall of described chamber wall, and described bearing beam is arranged on the top of described upper surface flange.
8. the anti-bias bin device of silo note grain according to claim 7, it is characterized in that, described heavy frame is rectangle, and described baffle plate is 4 pieces, is hinged on respectively on 4 limits of described rectangle.
9. a silo, there is grain inlet the upper end of described silo, described silo inside is provided with grain distributer in the below of described grain inlet, it is characterized in that, is provided with the anti-bias bin device of silo note grain in claim 1 to 8 described in arbitrary claim between described grain inlet and grain distributer.
10. silo according to claim 9, is characterized in that, the central axis coaxial of the central axis of the anti-bias bin device of described silo note grain and the crop inlet pipe of described grain distributer, described silo is silo or vertical silo.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410713606.XA CN104429408B (en) | 2014-11-28 | 2014-11-28 | Silo is noted the anti-bias bin device of grain and is had the silo of this device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410713606.XA CN104429408B (en) | 2014-11-28 | 2014-11-28 | Silo is noted the anti-bias bin device of grain and is had the silo of this device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104429408A true CN104429408A (en) | 2015-03-25 |
| CN104429408B CN104429408B (en) | 2016-05-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410713606.XA Withdrawn - After Issue CN104429408B (en) | 2014-11-28 | 2014-11-28 | Silo is noted the anti-bias bin device of grain and is had the silo of this device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104429408B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106742895A (en) * | 2016-11-30 | 2017-05-31 | 山东省元丰节能装备科技股份有限公司 | The method in the anti-bias storehouse of silo |
| CN110155758A (en) * | 2019-06-06 | 2019-08-23 | 中国计量大学 | The intelligent parallel robot of closing a position of rope driving |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH08116783A (en) * | 1994-10-26 | 1996-05-14 | Ishii Seisakusho:Kk | Elevation device for heavy material |
| CN201400415Y (en) * | 2009-03-20 | 2010-02-10 | 常州市荣创自动化设备有限公司 | Anti-segregation feed bin |
| CN202310648U (en) * | 2011-12-02 | 2012-07-11 | 安徽燕之坊食品有限公司 | Bulk granary |
| CN202625386U (en) * | 2012-05-08 | 2012-12-26 | 高凯旋 | Material distribution device |
| CN203582034U (en) * | 2013-09-30 | 2014-05-07 | 中煤集团山西金海洋能源有限公司 | Anti-blocking guide device used for multiple unloading rollers |
| CN203865621U (en) * | 2014-06-05 | 2014-10-08 | 江苏中矿立兴能源科技有限公司 | Vertical feeding funnel type buffer device for solid filling mining |
| CN204377477U (en) * | 2014-11-28 | 2015-06-10 | 北京华卓精科科技有限公司 | Silo is noted the anti-bias bin device of grain and is had the silo of this device |
-
2014
- 2014-11-28 CN CN201410713606.XA patent/CN104429408B/en not_active Withdrawn - After Issue
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08116783A (en) * | 1994-10-26 | 1996-05-14 | Ishii Seisakusho:Kk | Elevation device for heavy material |
| CN201400415Y (en) * | 2009-03-20 | 2010-02-10 | 常州市荣创自动化设备有限公司 | Anti-segregation feed bin |
| CN202310648U (en) * | 2011-12-02 | 2012-07-11 | 安徽燕之坊食品有限公司 | Bulk granary |
| CN202625386U (en) * | 2012-05-08 | 2012-12-26 | 高凯旋 | Material distribution device |
| CN203582034U (en) * | 2013-09-30 | 2014-05-07 | 中煤集团山西金海洋能源有限公司 | Anti-blocking guide device used for multiple unloading rollers |
| CN203865621U (en) * | 2014-06-05 | 2014-10-08 | 江苏中矿立兴能源科技有限公司 | Vertical feeding funnel type buffer device for solid filling mining |
| CN204377477U (en) * | 2014-11-28 | 2015-06-10 | 北京华卓精科科技有限公司 | Silo is noted the anti-bias bin device of grain and is had the silo of this device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106742895A (en) * | 2016-11-30 | 2017-05-31 | 山东省元丰节能装备科技股份有限公司 | The method in the anti-bias storehouse of silo |
| CN106742895B (en) * | 2016-11-30 | 2018-11-30 | 山东省元丰节能装备科技股份有限公司 | The method in the anti-bias library of silo |
| CN110155758A (en) * | 2019-06-06 | 2019-08-23 | 中国计量大学 | The intelligent parallel robot of closing a position of rope driving |
| CN110155758B (en) * | 2019-06-06 | 2024-03-08 | 中国计量大学 | Rope-driven intelligent parallel robot for flat bins |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104429408B (en) | 2016-05-25 |
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Address after: 100084 Beijing, Tsinghua University, Haidian District Institute of science and technology building, room B902 Applicant after: BEIJING U-PRECISION TECH Co.,Ltd. Address before: 100084 Beijing, Tsinghua University, Haidian District Institute of science and technology building, room B902 Applicant before: U-PRECISION TECH Co.,Ltd. |
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