CN206798666U - A kind of boom type flows bulk goods feeding apparatus for piling and filling - Google Patents

A kind of boom type flows bulk goods feeding apparatus for piling and filling Download PDF

Info

Publication number
CN206798666U
CN206798666U CN201720608814.2U CN201720608814U CN206798666U CN 206798666 U CN206798666 U CN 206798666U CN 201720608814 U CN201720608814 U CN 201720608814U CN 206798666 U CN206798666 U CN 206798666U
Authority
CN
China
Prior art keywords
hinged
piling
filling
working rig
bulk goods
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201720608814.2U
Other languages
Chinese (zh)
Inventor
袁建明
田颖辉
李勇智
王贡献
杨仲
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WUHAN K-CRANE OCEAN LIFTING TECHNOLOGY Co Ltd
Original Assignee
WUHAN K-CRANE OCEAN LIFTING TECHNOLOGY Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by WUHAN K-CRANE OCEAN LIFTING TECHNOLOGY Co Ltd filed Critical WUHAN K-CRANE OCEAN LIFTING TECHNOLOGY Co Ltd
Priority to CN201720608814.2U priority Critical patent/CN206798666U/en
Application granted granted Critical
Publication of CN206798666U publication Critical patent/CN206798666U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Earth Drilling (AREA)

Abstract

It the utility model is related to bulk material heap high-tech sector, disclose a kind of boom type flowing bulk goods feeding apparatus for piling and filling, including running gear, feeding machine and working rig, revolving dial and retractor device are installed on running gear, it is connected using revolving dial with working rig and retractor device is connected with feeding machine, during use, pass through the height and angle of retractor device adjustable feed machine, during meeting to use, in operation process, feeding machine one end lands, play a part of support, and when not in use, feeding machine can be lifted by retractor device, reach the purpose of quick transition so as to drive it to walk using running gear;And working rig of the present utility model is connected by then passing through revolving dial with supporting table, and it is hinged with the universal free bearing of feeding machine, therefore, in use, the adjustment of its position to working rig by revolving dial, can be realized, so as to expand the high region of the heap of working rig, meet to be actually needed.

Description

A kind of boom type flows bulk goods feeding apparatus for piling and filling
Technical field
Bulk material heap high-tech sector is the utility model is related to, is fed more particularly, to a kind of boom type flowing bulk goods Expect apparatus for piling and filling.
Background technology
In the occasion that mine, harbour etc. need to load and unload bulk cargo, what is be commonly used at present is grab bucket and conveyer belt dress Put, material is grabbed using grab bucket and conveyed on conveyer belt.It is badly in need of a kind of loading machine of the loose unpacked material of new way.
Based on this problem, there is the bulk cargo loading machine that unit have developed a new generation, such as in Chinese patent 2006100483214 A kind of disclosed apparatus for piling and filling bulk material, it includes vehicle body, conveyer belt and feeding structure, and wherein material fetching mechanism is a motorized pulleys, The purpose of feeding is realized to material grasping on conveyer belt by motorized pulleys, but the loading machine of this kind of structure is more complicated, because its Motorized pulleys are mounted on a mechanical arm, mechanical arm it is complicated, rigidity is also poor, is generally suitable for some wheats etc. The loading of grain, when loading the materials such as ore, coal, the problem of rocking just occurs.
In order to further solve above-mentioned technical problem, a kind of shifting is provided in Chinese patent CN201410457823.7 Dynamic formula bulk cargo loading machine, including vehicle body, conveyer mechanism and material fetching mechanism, conveyer mechanism include framework, transmission belt, scraper bowl and Idler assembly.The invention uses all-hydraulic design, and walking, feeding and conveyer belt all use hydraulic-driven, have automatic material feeding Function, while material fetching mechanism feeding, vehicle body can constantly be fed, and realize the action of automatic material feeding.Passed so as to solve System feeding loading machine poor rigidity and the technical problem easily rocked, still, during actual harbour bulk goods is accumulated, due to heap Dress material form and the influence for stowing place, the scraper bowl of one side part said structure can not effectively carry out feeding, on the other hand, Existing transport mechanism limited height, can not also realize the high purpose of its quick heap, and above-mentioned structure must combine extraneous bottom surface The gradient, it could accumulate and reach design height.
Utility model content
The utility model provides boom type flowing that is a kind of simple and compact for structure and being applicable to different working environments and dissipated Goods feeding apparatus for piling and filling, ability and the technical problem of the high limited height of heap are applicable to solve existing bulk goods apparatus for piling and filling place.
According to one side of the present utility model, there is provided a kind of boom type flows bulk goods feeding apparatus for piling and filling, including walking dress Put, feeding machine and working rig, the running gear include walking chassis, retractor device and supporting table, the supporting table is installed in In the walking chassis, and revolving dial is equiped with the supporting table, the working rig is hinged with the revolving dial;Institute State retractor device to be hinged in the supporting table, and be hinged and connected with the feeding machine, and the supporting table and the feeding machine It is hinged and connected;The working rig is provided with elevation mount, and universal free bearing is provided with the feeding machine, the elevation mount with The universal free bearing is hinged and connected.
On the basis of such scheme preferably, the elevation mount includes hydraulic cylinder and at least two support arms, the support Arm one end is connected with the working rig, and its other end is hinged;Described hydraulic cylinder one end is hinged with the support arm, and its is another End is hinged with the universal free bearing.
On the basis of such scheme preferably, the universal free bearing is globular hinge seat, the hydraulic cylinder and the spherical hinge Joint chair is hinged and connected.
On the basis of such scheme preferably, the support arm is hinged with the working rig.
On the basis of such scheme preferably, the walking chassis includes the crawler body that two parallel intervals are set, described Crawler belt is equiped with outside crawler body, and between the supporting table is installed in described two crawler bodies.
On the basis of such scheme preferably, the running gear also includes the control system being installed in the supporting table, The control system includes controller, and the elevation mount and retractor device are electrical connected with the controller respectively.
On the basis of such scheme preferably, the working rig includes one-level belt feeder, second belt machine and truss, and described two Level belt feeder is fixed at the top of the truss, and the one-level belt feeder extension type is installed in the truss, and the truss It is hinged on by the revolving dial in the supporting table.
On the basis of such scheme preferably, the feeding machine includes frame and conveying device, and the conveying device is installed in In the frame, and the retractor device is hinged in the frame, and the frame is hinged with the supporting table.
On the basis of such scheme preferably, the conveying device includes motor, carrier chain, drive sprocket and driven chain Wheel, the carrier chain is installed between the drive sprocket and the driven sprocket, and the output shaft of the motor and institute State drive sprocket to be connected, and closed belt is also equiped with the drive chain.
On the basis of such scheme preferably, the closed belt is spliced by least two pieces of belts.
The utility model provides a kind of boom type flowing bulk goods feeding apparatus for piling and filling, and revolving dial is installed on running gear And retractor device, it is connected using revolving dial with working rig and retractor device is connected with feeding machine, in use, passes through retractor device The height and angle of adjustable feed machine, to meet in use, feeding machine one end lands, play a part of support, and without using When, feeding machine can be lifted by retractor device, reach the purpose of quick transition so as to drive it to walk using running gear;And Working rig of the present utility model is connected by then passing through revolving dial with supporting table, and is hinged with the universal free bearing of feeding machine, because This, in use, the adjustment of its position to working rig by revolving dial, can be realized, so as to expand the Dui Gao areas of working rig Domain, meet to be actually needed.
A kind of boom type flowing bulk goods feeding apparatus for piling and filling of the present utility model, using running gear by feeding machine and working rig It is combined, makes its structure compacter, disclosure satisfy that the purpose of zonule operation;Feeding machine automation of the present utility model simultaneously Lift moves, and its quick transition can be achieved, convenient to use;And coordinate revolving dial, it can adjust the Dui Gao areas of working rig Domain, so as to improve its job area, use is more flexible.
Brief description of the drawings
Fig. 1 is the first structure graph that a kind of boom type of the present utility model flows bulk goods feeding apparatus for piling and filling;
Fig. 2 is second of structure graph that a kind of boom type of the present utility model flows bulk goods feeding apparatus for piling and filling;
Fig. 3 is second of state right view that a kind of boom type of the present utility model flows bulk goods feeding apparatus for piling and filling;
In figure:100th, running gear;110th, walking chassis;111st, crawler body;112nd, crawler belt;400th, control system; 120th, retractor device;130th, supporting table;140th, revolving dial;200th, feeding machine;210th, frame;220th, conveying device;300th, make Industry machine;310th, elevation mount;311st, hydraulic cylinder;312nd, support arm;313rd, universal free bearing;320th, one-level belt feeder;330th, two level Belt feeder;340th, truss.
Embodiment
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is described in further detail.Below Embodiment is used to illustrate the utility model, but is not limited to the scope of the utility model.
Refer to shown in Fig. 1, the utility model provides a kind of boom type flowing bulk goods feeding apparatus for piling and filling, including walking dress 100, feeding machine 200 and working rig 300 are put, wherein, running gear 100 is used to convey feeding machine 200 and working rig 300 to difference Place and region, and feeding machine 200 is used to treat the high article of heap to the conveying of working rig 300, working rig 300 is then responsible for article is defeated Deliver to designated area and give heap height, make full use of space so as to reach, the purpose to save space.
Refer to shown in Fig. 2, and with reference to shown in Fig. 3, running gear 100 of the present utility model includes walking chassis 110, stretched Compression apparatus 120 and supporting table 130, wherein, supporting table 130 is installed in walking chassis 110, and is equiped with supporting table 130 Revolving dial 140, working rig 300 are be hinged with revolving dial 140;One end of retractor device 120 is hinged in supporting table 130, its The other end is hinged and connected with feeding machine 200, and supporting table 130 is hinged and connected with feeding machine 200, and working rig 300 is provided with pitching Device 310, feeding machine 200 are provided with universal free bearing 313, and elevation mount 310 is hinged and connected with universal free bearing 313.
In use, feeding machine can be achieved by the be hinged and retractor device 120 between supporting table 130 in feeding machine 200 200 fixation on running gear 100, meanwhile, elongate or shorten achievable feeding machine 200 and ground using retractor device 120 The regulation of contact or disengaging between face, during use, when feeding machine 200 is in running order, retractor device 120 contracts It is short, feeding machine 200 then the pin joint between feeding machine 200 and supporting table 130 as the point of rotation so that feeding machine 200 is around this The point of rotation moves, and is contacted until feeding machine 200 directly produces with ground, so as to share the pressure on feeding machine 200, without making Used time, then retractor device 120 extend, feeding machine 200 then the pin joint between feeding machine 200 and supporting table 130 as the point of rotation, Feeding machine 200 is set to depart from ground, to facilitate running gear 100 to drive 200 rapid transition of feeding machine or adjustment relative position.
Working rig 300 of the present utility model, then using the revolving dial 140 being arranged in supporting table 130, coordinate pitching dress 310 are put, the adjustment of the operating area and height of the adjustment of angle and working rig 300 between working rig 300 and ground can be achieved.Tool Body process is that the one end of elevation mount 310 is be hinged with feeding machine 200, and the other end is connected with working rig 300, utilizes elevation mount 310 Drive the working rig 300 so that working rig 300 is using the pin joint on the pin joint on revolving dial 140 and feeding machine 200 as branch Support point carries out angle adjustment;When being limited by place or needing to carry out operation to the peripheral region of feeding machine 200, then can lead to The effect with the pin joint of universal free bearing and revolving dial 140 is crossed, is rotated in horizontal level, need not be changed so as to realize Become the position of feeding machine 200, and bulk goods is carried out to the peripheral region of feeding machine 200 and stowed, use is more convenient.
Please continue to refer to shown in Fig. 2, elevation mount 310 of the present utility model supports including hydraulic cylinder 311 and at least two Arm 312, as shown in Fig. 2 have three support arms 312 in the figure, and hydraulic cylinder 311 can also be pneumatic cylinder, hydraulic cylinder herein 311 do not have to be limited the scope of the utility model, are used only as example and are explained.Each support arm 312 of the present utility model One end is hinged and connected with working rig 300, and the other end of each support arm 312 is hinged;The one end of hydraulic cylinder 311 and support Arm 312 is be hinged, and the universal free bearing of its other end and feeding machine 200 is hinged.
During work, the horizon elevation angle of working rig 300 can be changed by elongating or shortening for the expansion link of hydraulic cylinder 311, tool Body running process is:Hydraulic cylinder 311 expansion link elongation so that working rig 300 using the strong point on panoramic table as fulcrum, around The fulcrum rotates down, to reach the purpose for reducing the elevation angle of working rig 300, as shown in Figure 1;And when the expansion link of hydraulic cylinder 311 During retraction so that working rig 300 is rotated up using the strong point on panoramic table as fulcrum around the fulcrum, to reach complete machine work The purpose at the elevation angle of industry machine 300, meet the needs of different heap high height, as shown in Figure 2.
Preferably, universal free bearing 313 of the present utility model is globular hinge seat, and hydraulic cylinder 311 is hinged with globular hinge seat It is connected.In use, using the effect of globular hinge seat and revolving dial 140, working rig 300 can be driven to be revolved in the horizontal plane Transhipment is dynamic, is not changing the relative position of running gear so as to realize, is completing the operation to the peripheral region of feeding machine 200, uses It is more convenient.Further, support arm 312 of the present utility model and working rig 300 are be hinged.
In another preferred embodiment of the present utility model, walking chassis 110 of the present utility model includes two parallel Every the crawler body 111 of setting, crawler body 111 is equiped with crawler belt 112 outside, and supporting table 130 is installed in into two track bottoms Between disk 111 so that the structure of H-shaped is formed between crawler body 111 and supporting table 130, with utility model feeding machine 200 and is made The installation of industry machine 300, meanwhile, the bearing capacity of guarantee running gear 100.
In another preferred embodiment of the present utility model, running gear 100 also includes the control being installed in supporting table 130 System 400 processed, control system 400 include controller, and elevation mount 310 and retractor device 120 are electrical connected with controller respectively. The Automated condtrol to working rig 300 and the state of feeding machine 200 can be realized using controller, so that its use is more convenient Fast.
In another preferred embodiment of the present utility model, working rig 300 of the present utility model includes one-level belt feeder 320th, second belt machine 330 and truss 340, second belt machine 330 are fixed on the top of truss 340, and one-level belt feeder 320 is scalable Formula is installed in truss 340, and truss 340 is hinged in supporting table 130 by revolving dial 140.I.e. working rig 300 utilizes one-level Belt feeder 320 and second belt machine 330 can improve the operating area of working rig 300, to meet the place needs of different range.
In another preferred embodiment of the present utility model, feeding machine 200 of the present utility model includes frame 210 and conveying Device 220, frame 210 are in the L-type of bending, and conveying device 220 is installed in frame 210, and retractor device 120 is hinged on frame On 210, and make frame 210 be hinged with the supporting table 130.In use, realize goods from feeding machine using conveying device 220 200 arrive the transport of working rig 300, and at the same time, the utility model also coordinates season by the way that retractor device 120 and frame 210 are be hinged Section is be hinged with supporting table 130, forms two hinged support points, is moved by retractor device 120, drives frame 210 around two Hinged support point moves, so as to realize the ground connection of feeding machine 200 with departing from the transformation of ground two states, to meet to use needs.
Further, conveying device 220 of the present utility model includes motor, carrier chain, drive sprocket and driven chain Wheel, wherein, carrier chain is installed between drive sprocket and driven sprocket, and the output shaft of the motor and drive sprocket phase Even, and closed belt is also equiped with drive chain.Drive sprocket rotation is driven using motor so that carrier chain turns It is dynamic, to realize the conveying of goods, and at the same time, in order to meet the conveying of bulk goods, bulk goods is avoided from the gap between carrier chain It is scattered, the utility model also sets closed belt on carrier chain, to realize the sealing in gap between carrier chain.
Because boom type flowing bulk goods feeding apparatus for piling and filling is used in harbour service or mineral course of conveying, therefore, this Width between the carrier chain of utility model is larger, and in actual production, width is bigger, and the cost of belt is also higher, in order to Its production cost is reduced, closed belt of the present utility model is spliced by more root skin bands.Certainly, sealing skin of the present utility model Band can also be that a root skin band is formed, so as to ensure its sealing effectiveness.
The utility model provides a kind of boom type flowing bulk goods feeding apparatus for piling and filling, and revolution is installed on running gear 100 Platform 140 and retractor device 120, are connected using revolving dial 140 with working rig 300 and retractor device 120 is connected with feeding machine, In use, by the height and angle of the adjustable feed machine 200 of retractor device 120, to meet in use, the one end of feeding machine 200 Land, play a part of support, without in use, can be lifted feeding machine 200 by retractor device 120, so as to utilize walking Its walking of the drive of device 100 reaches the purpose of quick transition;And working rig 300 of the present utility model is by then passing through revolving dial 140 are connected with supporting table 130, and are hinged with the universal free bearing of feeding machine 200, therefore, in use, can by revolving dial 140, The adjustment of its position to working rig 300 is realized, so as to expand the high region of the heap of working rig 300, meets to be actually needed.
A kind of boom type flowing bulk goods feeding apparatus for piling and filling of the present utility model, using running gear 100 by the He of feeding machine 200 Working rig 300 is combined, and is made its structure compacter, be disclosure satisfy that the purpose of zonule operation;Confession of the present utility model simultaneously The automation lift motion of material machine, can be achieved its quick transition, convenient to use;And coordinate revolving dial 140, it can adjust and make The high region of heap of industry machine 300, so as to improve its job area, use is more flexible.
Finally, the present processes are only preferable embodiment, are not intended to limit the scope of protection of the utility model. All any modification, equivalent substitution and improvements within the spirit and principles of the utility model, made etc., should be included in this reality Within new protection domain.

Claims (10)

1. a kind of boom type flows bulk goods feeding apparatus for piling and filling, it is characterised in that including running gear, feeding machine and working rig, institute Stating running gear includes walking chassis, retractor device and supporting table, and the supporting table is installed in the walking chassis, and in institute State and revolving dial is equiped with supporting table, the working rig is hinged with the revolving dial;The retractor device is hinged on described In supporting table, and it is hinged and connected with the feeding machine, and the supporting table is hinged and connected with the feeding machine;On the working rig Provided with elevation mount, and universal free bearing is provided with the feeding machine, the elevation mount is hinged and connected with the universal free bearing.
A kind of 2. boom type flowing bulk goods feeding apparatus for piling and filling as claimed in claim 1, it is characterised in that the elevation mount bag Hydraulic cylinder and at least two support arms are included, described support arm one end is connected with the working rig, and its other end is hinged;It is described Hydraulic cylinder one end is hinged with the support arm, and its other end is hinged with the universal free bearing.
3. a kind of boom type flowing bulk goods feeding apparatus for piling and filling as claimed in claim 2, it is characterised in that the universal free bearing is Globular hinge seat, the hydraulic cylinder are hinged and connected with the globular hinge seat.
4. a kind of boom type flowing bulk goods feeding apparatus for piling and filling as claimed in claim 2, it is characterised in that the support arm and institute Working rig is stated to be hinged.
A kind of 5. boom type flowing bulk goods feeding apparatus for piling and filling as claimed in claim 1, it is characterised in that the walking chassis bag The crawler body that two parallel intervals are set is included, is equiped with crawler belt outside the crawler body, and institute is installed in the supporting table State between two crawler bodies.
6. a kind of boom type flowing bulk goods feeding apparatus for piling and filling as claimed in claim 1, it is characterised in that the running gear is also Including the control system being installed in the supporting table, the control system includes controller, the elevation mount and flexible dress Put and be electrical connected respectively with the controller.
7. a kind of boom type flowing bulk goods feeding apparatus for piling and filling as claimed in claim 1, it is characterised in that the working rig includes One-level belt feeder, second belt machine and truss, the second belt machine are fixed at the top of the truss, and the one-level belt feeder can It is telescopic to be installed in the truss, and the truss is hinged in the supporting table by the revolving dial.
8. a kind of boom type flowing bulk goods feeding apparatus for piling and filling as claimed in claim 1, it is characterised in that the feeding machine includes Frame and conveying device, the conveying device are installed in the frame, and the retractor device is hinged in the frame, and The frame is set to be hinged with the supporting table.
A kind of 9. boom type flowing bulk goods feeding apparatus for piling and filling as claimed in claim 8, it is characterised in that the conveying device bag Motor, carrier chain, drive sprocket and driven sprocket are included, the carrier chain is installed in the drive sprocket and the driven chain Between wheel, and the output shaft of the motor is connected with the drive sprocket, and sealing is also equiped with the drive chain Belt.
A kind of 10. boom type flowing bulk goods feeding apparatus for piling and filling as claimed in claim 9, it is characterised in that the closed belt It is spliced by least two pieces of belts.
CN201720608814.2U 2017-05-27 2017-05-27 A kind of boom type flows bulk goods feeding apparatus for piling and filling Active CN206798666U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720608814.2U CN206798666U (en) 2017-05-27 2017-05-27 A kind of boom type flows bulk goods feeding apparatus for piling and filling

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201720608814.2U CN206798666U (en) 2017-05-27 2017-05-27 A kind of boom type flows bulk goods feeding apparatus for piling and filling

Publications (1)

Publication Number Publication Date
CN206798666U true CN206798666U (en) 2017-12-26

Family

ID=60743492

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201720608814.2U Active CN206798666U (en) 2017-05-27 2017-05-27 A kind of boom type flows bulk goods feeding apparatus for piling and filling

Country Status (1)

Country Link
CN (1) CN206798666U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107117466A (en) * 2017-05-27 2017-09-01 武汉开锐海洋起重技术有限公司 A kind of boom type flows bulk goods feeding apparatus for piling and filling
CN110053984A (en) * 2019-06-10 2019-07-26 成渝钒钛科技有限公司 Schreyerite stock yard blending yard integration capability method for improving

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107117466A (en) * 2017-05-27 2017-09-01 武汉开锐海洋起重技术有限公司 A kind of boom type flows bulk goods feeding apparatus for piling and filling
CN110053984A (en) * 2019-06-10 2019-07-26 成渝钒钛科技有限公司 Schreyerite stock yard blending yard integration capability method for improving

Similar Documents

Publication Publication Date Title
CN102758625B (en) Material rolling-raking loader and material rolling-raking loading method
CN206798666U (en) A kind of boom type flows bulk goods feeding apparatus for piling and filling
CN107857056A (en) A kind of Extendible belt conveyer applied to logistics transportation
CN205575135U (en) Screw ship unloader
CN203781398U (en) Loading system and energy-saving loading device thereof
CN111874537A (en) Automatic bulk cargo case packer of flexible belt oscillating
CN104192585A (en) Movable loader for bulk materials
FI127094B (en) Material processing plant
CN205471708U (en) Rotatory windrow discharge apparatus
CN102785943A (en) Movable large bulk cargo stacking device
CN209651245U (en) A kind of granule materials conveyer belt handler
CN207393252U (en) A kind of spoil automatic filling system
CN103771157A (en) Ship loader
CN105775778B (en) Flow-type side is fed chain type apparatus for piling and filling bulk material
CN107117466A (en) A kind of boom type flows bulk goods feeding apparatus for piling and filling
CN109650092A (en) Mobile piler
CN106986194A (en) A kind of rubber-tyred moving stacking device
CN105540280B (en) The remote control bin discharger that a kind of dual rotary multi-angle adjusts
CN208516529U (en) A kind of Novel packaged cement train loading machine
CN206827654U (en) A kind of tyre rotation flow-type bulk goods apparatus for piling and filling
CN202642860U (en) Movable large-scale bulk cargo stacking equipment
CN205739513U (en) A kind of crawler type rehandling facilities
CN107082292B (en) Bulk cargo receiving and unloading equipment
CN109808912A (en) A kind of airport vehicle-mounted telescopic conveyer
JP2006206254A (en) Self-propelled transport device

Legal Events

Date Code Title Description
GR01 Patent grant