CN208066979U - A kind of inverted plate drawing machine pressing device - Google Patents
A kind of inverted plate drawing machine pressing device Download PDFInfo
- Publication number
- CN208066979U CN208066979U CN201820293515.9U CN201820293515U CN208066979U CN 208066979 U CN208066979 U CN 208066979U CN 201820293515 U CN201820293515 U CN 201820293515U CN 208066979 U CN208066979 U CN 208066979U
- Authority
- CN
- China
- Prior art keywords
- roller
- pedestal
- pressing device
- drawing machine
- stand
- 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.)
- Expired - Fee Related
Links
- 238000003825 pressing Methods 0.000 title claims abstract description 22
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 57
- 229910052802 copper Inorganic materials 0.000 claims abstract description 57
- 239000010949 copper Substances 0.000 claims abstract description 57
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 39
- 230000004323 axial length Effects 0.000 claims abstract description 3
- 238000005452 bending Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 230000001681 protective effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 240000008564 Boehmeria nivea Species 0.000 description 1
- 241001631457 Cannula Species 0.000 description 1
- -1 Copper-Aluminum compound Chemical class 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The utility model discloses a kind of inverted plate drawing machine pressing devices, field is produced and processed applied to copper pipe, its key points of the technical solution are that including hold-down roller, oil cylinder and compressing support, hold-down roller includes the roller for being fixed in the roller seat of oil cylinder output end and being rotatably connected on roller seat, compressing support includes affixed pedestal on the support frame and the stand that is slidably connected on bearing, oil cylinder is fixed on the stand, the glide direction of stand is parallel with the pivot center of roller, the axial length of roller is less than the sliding length of stand, help to reduce the shape difference in a roll of copper pipe everywhere.
Description
Technical field
The utility model is related to copper pipes to produce and process field, more particularly to a kind of inverted plate drawing machine pressing device.
Background technology
A kind of metal pipe material drawing equipment of the inverted plate drawing machine as high speed, is used in copper pipe, aluminum pipe, Copper-Aluminum compound
In the drawing production of pipe, copper pipe and other minor diameter thin wall pipes, using very extensively especially in copper pipe processing.
Existing inverted plate drawing machine, such as the Chinese patent that Authorization Notice No. is CN201760456U, structure is mainly wrapped
Braced frame, main motor, main gear reducer, pull-disc, pressing device, drawing die seat assembly, uncoiler, winder and electricity are included
Device hydropneumatic system, wherein pressing device include hold-down roller and oil cylinder, are drawn tubing and are released by uncoiler, by drawing
It after die holder assembly drawing molding, is wrapped on pull-disc, main motor, main gear reducer driving pull-disc are rotated to being drawn pipe
Material provides pulling capacity, and the hold-down roller in several groups pressing device makes drawing pipes be tightly attached on pull-disc, the tubing after drawing
It falls into winder charging basket after winding several circles on pull-disc, to complete the complete drawing process of tubing, realizes
Tube reducing, the purpose for subtracting wall.
The length of the hold-down roller of the pressing device of this inverted plate drawing machine, entire volume tubing is coiled on pull-disc
Whole height is all limited in the range of compression.But such design be easy to cause the journey that the copper pipe of different location is extruded
Degree is different.The copper pipe first wound, which can pass through, repeatedly to be compressed, and the number that the copper pipe then wound receives compression is relatively fewer.It is easy to make
At a roll of copper pipe having a certain difference in shape everywhere.
Utility model content
The purpose of this utility model is to provide a kind of inverted plate drawing machine pressing device, helps to reduce each in a roll of copper pipe
The shape difference at place.
The above-mentioned technical purpose of the utility model technical scheme is that：
A kind of inverted plate drawing machine pressing device, including hold-down roller, oil cylinder and compressing support, hold-down roller include being fixed in oil
The roller seat of cylinder output end and the roller being rotatably connected on roller seat, compressing support include affixed pedestal on the support frame with
And it is slidably connected at the stand on bearing, oil cylinder is fixed on the stand, the glide direction of stand and the pivot center of roller
Parallel, the axial length of roller is less than the sliding length of stand.
By using above-mentioned technical proposal, setting sliding stand and relatively small roller, the copper for making each roller compress
Pipe quantity is reduced, with copper pipe disk increases around the number of turns can be with, stand can drive hold-down roller slide downward, ensure that roller can begin
Terminating is wrapped in the copper pipe on pull-disc after touch, it is possible to reduce be first coiled on pull-disc by with hub disk around copper pipe
Between the number difference by hold-down roller.Keep the degree that copper pipe is compacted everywhere similar, can effectively reduce in compaction process
The copper pipe uneven deformation of generation, helps to improve the quality of copper pipe.
Preferably, being provided with indent compatible with copper pipe diameter, the surface of the indent and copper pipe on the periphery of roller
Contact.
By using above-mentioned technical proposal, setting indent makes roller fitting copper pipe more closely, while indent can conduct
Guide frame copper pipe disk around during, indent moves towards to drive stand slide downward along copper pipe, the movement of stand completely by
The coiling situation of copper pipe determines, the movement of hold-down roller and stand can be kept without independent driving；Avoid roller simultaneously
The case where being detached with copper pipe improves the positional precision of hold-down roller.
Preferably, being provided at least two indents on each roller, adjacent indent is closely adjacent.
By using above-mentioned technical proposal, at least two indents of setting can utilize the spacing that indent ensures that copper pipe is wound,
Contribute to the winding that copper pipe is neat.
Preferably, the edge rounded corner of indent.
By using above-mentioned technical proposal, avoids the sharp edges of indent from scratching the outer wall of copper pipe, help to ensure that copper pipe
Quality.
Preferably, roller seat includes pedestal, two connecting plates and is detachably fixed the positioning plate being connected on pedestal, pedestal
On be provided with socket, connecting plate is respectively positioned on positioning plate in the socket, connecting plate bending, formed between pedestal and positioning plate with it is curved
Compatible limit gap at folding, the both ends for taking turns roller are rotatably connected on respectively on two connecting plates.
By using above-mentioned technical proposal, the structure setting that support roller wheel is rotated for ease of dismounting structure, to just
In the dismounting of roller, this structure makes it possible the rollers of a variety of indent shapes of configuration, and different indents, which is arranged, to be adapted to
Various sizes of copper pipe ensures that the design of indent does not interfere with the versatility of equipment entirety.
Preferably, being provided with mounting hole on pedestal, the fixed link for being inserted into positioning plate is plugged in the mounting hole.
It is simple in structure using the form connected positioning plate and pedestal of plugged and fixed bar by using above-mentioned technical proposal, easily
In grafting, structural strength and rigidity are preferable.
Preferably, being connected with bearing on the end face of two connecting plates toward each other, splined shaft, roller are connected on the bearing
Axis hole compatible with splined shaft is provided on wheel.
By using above-mentioned technical proposal, setting bearing ensures that the rotation of roller is smooth, while splined shaft and axis hole is arranged,
Convert connection more complicated in pressure roller disassembly process to the grafting process of splined shaft and axis hole, the operation letter of operating personnel
Just.
Preferably, be rotatably connected to adjusting seat on pedestal, the axis that pedestal is rotated relative to adjusting seat is perpendicular to roller
Axis.
By using above-mentioned technical proposal, when the diameter for being processed copper pipe changes, copper pipe is coiled on pull-disc
Inclined degree be also not quite similar, the relative rotation of adjusting seat and pedestal is set, make the inclinations of two being adapted to property of roller with
The practical tendency of copper pipe is adapted.
In conclusion the utility model has the advantages that：
Can reduce first be coiled on pull-disc by hub disk around copper pipe between the number by hold-down roller
Difference；Effectively reduce the copper pipe uneven deformation generated in compaction process；Help to improve the quality of copper pipe；Contribute to copper pipe neat
Winding；The versatility of equipment entirety is good；It is easy to operate.
Description of the drawings
Fig. 1 is the structural schematic diagram of inverted plate drawing machine pressing device；
Fig. 2 is the schematic diagram that hold-down roller is contacted with copper pipe；
Fig. 3 is the sectional view of hold-down roller；
Fig. 4 is hold-down roller exploded perspective view；
Fig. 5 is the structural schematic diagram of Wipe assembly；
Fig. 6 is the axial sectional view of Wipe assembly；
Fig. 7 is the structural schematic diagram being in charge of；
Fig. 8 is the radial cross-section of Wipe assembly.
In figure, 1, hold-down roller；11, roller seat；111, pedestal；1111, socket；1112, mounting hole；112, connecting plate；113,
Positioning plate；1131, fixed secondary orifices；114, adjusting seat；115, gap is limited；116, fixed link；12, roller；122, axis hole；121, it presses
Slot；13, bearing；14, splined shaft；2, oil cylinder；3, compressing support；31, pedestal；311, slot is found；32, stand；321, casting lug thereon；4,
Wipe assembly；41, stock；411, casing；4111, it is in charge of；4112, protrusion；4113, recess portion；4114, sealing plate；4115, inserted block；
413, switch block；4131, slot；42, fixed frame；421, turn trough；43, elastic cleaning part；44, protective cover；5, pull-disc；6, copper
Pipe.
Specific implementation mode
The utility model is described in further detail below in conjunction with attached drawing.The identical attached drawing of wherein identical parts
Label indicates.It should be noted that word "front", "rear" used in the following description, "left", "right", "up" and "down" refer to
It is the direction in attached drawing, word " bottom surface " and " top surface ", "inner" and "outside" are referred respectively to towards or away from particular elements geometry
The direction at center.
A kind of inverted plate drawing machine pressing device, as depicted in figs. 1 and 2, including hold-down roller 1, oil cylinder 2, compressing support 3 with
And Wipe assembly 4.
Compressing support 3 includes pedestal 31 and the stand 32 being slidably connected on pedestal 31.Pedestal 31 is fixed in inverted disk
In the braced frame of machine drawing, and positioned at the side of inverted plate drawing machine pull-disc 5.Pedestal 31 is towards the end face of pull-disc 5
On be provided with through-hole, stand 32 slides in the through-hole along the axis direction of pull-disc 5.It is provided on the side wall of the through-hole perpendicular
Straight vertical slot 311 is connected with casting lug thereon compatible with vertical slot 311 321 on the side wall of stand 32.
In conjunction with shown in Fig. 3 and Fig. 4, stand 32 is towards being provided with notch, the affixed institute of oil cylinder 2 on the end face of pull-disc 5
It states in notch, and the telescopic end of oil cylinder 2 stretches out stand 32 from indentation, there.The telescopic direction of 2 telescopic end of oil cylinder and pull-disc 5
Axis intersects vertically.The telescopic end of oil cylinder 2 is connected with hold-down roller 1.
As shown in figure 4, hold-down roller 1 includes roll stand and two rollers 12 being rotatably connected in roll stand.The setting of roller 12 exists
Hold-down roller 1 is close to one end of pull-disc 5.Roll stand include the adjusting seat 114 affixed with 2 telescopic end of oil cylinder, with 114 turns of adjusting seat
The pedestal 111 of dynamic connection, the positioning plate 113 being arranged on pedestal 111 and connecting plate 112.Roller 12 is arranged in connecting plate 112
On.
Pedestal 111 is parallel with the telescopic direction of oil cylinder 2 relative to the pivot center of adjustment.Pedestal 111 is far from adjusting seat 114
End face on be provided with socket 1111.Two connecting plates 112 and positioning plate 113 are inserted into socket 1111.Two connecting plates 112
It is identical, be arranged abutted respectively with the upper and lower surface of socket 1111 one on the other, positioning plate 113 between two connecting plates 112 simultaneously
It is abutted with two connecting plates 112.One end in two 112 sockets 1111 of connecting plate is bent toward each other, in 111 socket 1111 of pedestal
Limit gap compatible with the bending place 115 is formed between wall and positioning plate 113.It is provided with through seat on the side wall of pedestal 111
Body 111 and the mounting hole 1112 passed through from socket 1111, are provided with fixed secondary orifices 1131 on positioning plate 113.One fixed link 116 is set
It is passed through from mounting hole 1112 and fixed secondary orifices 1131, positioning plate 113 and the relative position of pedestal 111 is made to fix.
Roller 12 is sandwiched between two connecting plates 112.Two connecting plates 112 have two on end face toward each other
A blind hole is connected with bearing 13 in the blind hole.The inner ring of each bearing 13 is affixed, and there are one splined shafts 14.The axis of roller 12
Axis hole compatible with the splined shaft 14 122 is provided on end face.
Three annular indents 121 are provided on the periphery of roller 12, three indents 121 are coaxial with roller 12 and closely arrange
On the circumferential surface of roller 12,12 circumferential surface of roller is taken.The cross section of indent 121 be arch, the bowed diameter with added
6 diameter of copper pipe of work is identical.The edge rounded corner of indent 121.
In conjunction with shown in Fig. 5, Fig. 6 and Fig. 8, Wipe assembly 4 includes fixed frame 42, stock 41, elastic cleaning part 43 and protects
Shield 44.Fixed frame 42 is fixed on the bottom surface of pedestal 111, and is extended to the side of pedestal 111.Fixed frame 42 is towards copper pipe 6
Extend into the side of hold-down roller 1 and pull-disc 5.42 generally curved plate of fixed frame, the upper surface of fixed frame 42 is provided with
Arc-shaped turn trough 421, turn trough 421 are T-slot.The turn trough 421 is parallel with the axis of pull-disc 5, and and adjacent roller
The theoretical circle of the center of circle composition of 121 cross section of minimum indent is tangent on 12.
Stock 41 includes switch block 413 compatible with turn trough 421, it is solid to be fixed in fixed ring 412 and grafting on switch block 413
Determine the casing 411 in ring 412.Switch block 413 moves in turn trough 421, and the whole axis around turn trough 421 of stock 41 rotates.Casing
411 be pipe, casing 411 be divided into two along its own axis to be formed two it is independent be in charge of 4111,43 He of elastic cleaning part
Protective cover 44 is wrapped in casing 411.In conjunction with shown in Fig. 7, it is in charge of 4111 between another be in charge of on the surface that 4111 are combined
Every setting protrusion 4112 and recess portion 4113.Two when being in charge of 4111 opposite synthesis complete cannula 411, protrusion 4112 is inserted into another
It is in charge of in 4111 recess portion 4113.The both ends of casing 411 seal elastic cleaning part 43 and protective cover 44, sealing plate equipped with sealing plate 4114
The through-hole for only allowing copper pipe 6 to pass through is provided on 4114.
The upper surface of switch block 413 is provided with slot 4131, and slot 4131 is T-slot, and slot 4131 is set along the radial direction of turn trough 421
It sets.Slot 4131 is shut close to one end of 421 axis of turn trough, far from open at one end.It is in charge of on 4111 for two and has been respectively and fixedly connected with L-type
Inserted block 4115, after two are in charge of 4111 splits, two L-type inserted blocks 4115 piece together T-type compatible with slot 4131.Two
Inserted block 4115 is plugged in slot 4131 simultaneously.
In conjunction with shown in Fig. 6 and Fig. 8, elastic cleaning part 43 is made of sponge, and elastic cleaning part 43 includes two semi-circle tubulars
Part.In its natural state, internal diameter is less than the outer diameter of copper pipe 6 to the semi-circular tube, and outer diameter is more than the maximum gauge of casing 411.It protects
Shield 44 is made of flexible material, such as ramie cotton fabric, and there are two wrap up the two of elastic cleaning part 43 respectively for the setting of protective cover 44
Part.
In use, stand 32 is moved to 31 top of pedestal, two elastic cleaning parts 43 with protective cover 44 are distinguished
It fills in two to be in charge of in 4111, between the setting of copper pipe 6 two is in charge of 4111, is in charge of 4111 opposite synthesis complete cannulas by two
411, casing 411 clamps copper pipe 6, and inserted block is inserted into slot, 6 end of copper pipe is fixed on pull-disc 5, and by copper pipe 6
It is sent into the indent 121 of 12 bottom of roller, starts oil cylinder 2 and roller 12 is pressed into pull-disc 5, copper pipe 6 is justified with pull-disc 5
Circumferential surface abuts, and pull-disc 5 starts to rotate, and is slipped over by intermediate from elastic cleaning part 43, through overpressure grooves 121, is coiled in drawing
It pulls out on disk 5, after one circle of the winding of copper pipe 6, initial copper pipe 6 enters intermediate indent 121, and the second circle 6 entrance of copper pipe is most lower
The indent 121 of side, stand 32 slowly move down, until copper pipe 6 is all wrapped on pull-disc 5.
When multiple pressing devices are arranged, the Wipe assembly 4 only at first on the pressing device of contact copper pipe 6 connects with copper pipe 6
It touches.The roller 12 of multigroup different model can be configured, indent on different model roller 12 121 is different, cross section with often
See being adapted for model copper pipe 6.
This specific embodiment is only the explanation to the utility model, is not limitations of the present invention, ability
Field technique personnel can as needed make the present embodiment the modification of not creative contribution after reading this specification, but
As long as all being protected by Patent Law in the right of the utility model.
Claims (8)
1. a kind of inverted plate drawing machine pressing device, including hold-down roller (1), oil cylinder (2) and compressing support (3), hold-down roller (1) packet
Include the roller (12) for being fixed in the roller seat (11) of oil cylinder (2) output end and being rotatably connected on roller seat (11), it is characterised in that：
Compressing support (3) includes affixed pedestal (31) on the support frame and the stand (32) that is slidably connected on bearing, oil cylinder
(2) it is fixed on the stand (32), the glide direction of stand (32) is parallel with the pivot center of roller (12), roller (12)
Axial length is less than the sliding length of stand (32).
2. inverted plate drawing machine pressing device according to claim 1, it is characterised in that：It is opened on the periphery of roller (12)
There are indent (121) compatible with copper pipe (6) diameter, the surface of the indent (121) to be contacted with copper pipe (6).
3. inverted plate drawing machine pressing device according to claim 2, it is characterised in that：It is provided on each roller (12)
At least two indents (121), adjacent indent (121) are close adjacent.
4. inverted plate drawing machine pressing device according to claim 2, it is characterised in that：The edge rounding of indent (121)
Angle.
5. inverted plate drawing machine pressing device according to claim 2, it is characterised in that：Roller seat (11) includes pedestal
(111), two connecting plates (112) and it is detachably fixed the positioning plate (113) being connected on pedestal (111), on pedestal (111)
It is provided with socket (1111), connecting plate (112) is respectively positioned on positioning plate (113) in the socket (1111), and connecting plate (112) is curved
Folding forms limit gap (115) compatible with bending place between pedestal (111) and positioning plate (113), the both ends for taking turns roller turn respectively
It is dynamic to be connected on two connecting plates (112).
6. inverted plate drawing machine pressing device according to claim 5, it is characterised in that：Pedestal is provided with fixation on (111)
Hole (1112), the mounting hole (1112) is interior to be plugged with the fixed link (116) for being inserted into positioning plate (113).
7. inverted plate drawing machine pressing device according to claim 5, it is characterised in that：Two connecting plate (112) directions
It is connected with bearing (13) on mutual end face, splined shaft (14) is connected on the bearing (13), is provided on roller (12) and flower
The compatible axis hole (122) of key axis (14).
8. inverted plate drawing machine pressing device according to claim 5, it is characterised in that：Pedestal is rotatablely connected on (111)
There is an adjusting seat (114), axis of the axis that pedestal (111) is rotated relative to adjusting seat (114) perpendicular to roller (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820293515.9U CN208066979U (en) | 2018-03-01 | 2018-03-01 | A kind of inverted plate drawing machine pressing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820293515.9U CN208066979U (en) | 2018-03-01 | 2018-03-01 | A kind of inverted plate drawing machine pressing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208066979U true CN208066979U (en) | 2018-11-09 |
Family
ID=64039550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820293515.9U Expired - Fee Related CN208066979U (en) | 2018-03-01 | 2018-03-01 | A kind of inverted plate drawing machine pressing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208066979U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109570250A (en) * | 2018-11-23 | 2019-04-05 | 曹县爱伦金属加工有限公司 | A kind of method and ultra-thin-wall copper pipe for processing ultra-thin-wall copper pipe |
| CN110404989A (en) * | 2019-08-05 | 2019-11-05 | 苏州奥智智能设备股份有限公司 | The pressing roller regulating mechanism of disk cylinder drawbench |
| CN110648836A (en) * | 2019-09-26 | 2020-01-03 | 武汉市华兴特种变压器制造有限公司 | Multifunctional long round water-cooling copper pipe winding device and winding method |
-
2018
- 2018-03-01 CN CN201820293515.9U patent/CN208066979U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109570250A (en) * | 2018-11-23 | 2019-04-05 | 曹县爱伦金属加工有限公司 | A kind of method and ultra-thin-wall copper pipe for processing ultra-thin-wall copper pipe |
| CN110404989A (en) * | 2019-08-05 | 2019-11-05 | 苏州奥智智能设备股份有限公司 | The pressing roller regulating mechanism of disk cylinder drawbench |
| CN110404989B (en) * | 2019-08-05 | 2024-02-23 | 苏州奥智智能设备股份有限公司 | Pinch roller adjusting mechanism of bobbin drawing machine |
| CN110648836A (en) * | 2019-09-26 | 2020-01-03 | 武汉市华兴特种变压器制造有限公司 | Multifunctional long round water-cooling copper pipe winding device and winding method |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20181109 |