CN206682086U - A kind of double mode billet caster straightening hydraulic system - Google Patents
A kind of double mode billet caster straightening hydraulic system Download PDFInfo
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- CN206682086U CN206682086U CN201720382343.8U CN201720382343U CN206682086U CN 206682086 U CN206682086 U CN 206682086U CN 201720382343 U CN201720382343 U CN 201720382343U CN 206682086 U CN206682086 U CN 206682086U
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Abstract
A kind of double mode billet caster straightening hydraulic system, belong to continuously casting technical field, purpose is to improve the utilization rate of billet caster, its technical scheme is, the straightening hydraulic system, which is formed, includes the upper pressure roller multiple throwing hydraulic cylinders being connected with the every first-class each throwing frame of billet caster and the hydraulic cylinder of moulding adobe blocks being connected with the upper pressure roller of every first-class frame of moulding adobe blocks respectively, and with each throwing hydraulic cylinder and hydraulic cylinder multiple hydraulic control systems correspondingly of moulding adobe blocks, the hydraulic control system of each throwing hydraulic cylinder includes slighter compress hydraulic pressure unit, the hydraulic control system of part throwing frame is provided with conventional hydraulic unit.The utility model is provided with the hydraulic control system with slighter compress hydraulic pressure unit and conventional hydraulic unit in every one stream of billet caster, two kinds of hydraulic pressure units can switch over according to the species of product, utilization rate of equipment and installations is thus substantially increased, realizes the maximization of the performance of enterprises.
Description
Technical field
It the utility model is related to a kind of billet caster straightening hydraulic pressure that operational mode can be selected according to the species of product
System, belong to continuously casting technical field.
Background technology
Withdrawal straightening machine is the nucleus equipment of billet caster, and straightening hydraulic system is the core of withdrawal straightening machine.Conventional
Straightening hydraulic system fault is few, system run all right, and has the advantages that pulling rate is fast, yield is big, is producing common steel grade
Aspect has obvious advantage.
With exploitation of the variety steel on billet caster, new want is proposed to the crudy of billet caster
Ask.Production fine quality steel needs withdrawal straightening machine to have dynamic soft-reduction function, and so-called slighter compress just refers to by continuous casting billet liquid
Core end nearby revolves plus-pressure and produces certain drafts to compensate the solidification shrinkage amount of strand, on the one hand can eliminate or reduce
Strand shrinks the internal voids to be formed, and prevents the molten steel of intergranular solute element from being flowed to strand central cross；On the other hand,
Squeezing action caused by slighter compress can also promote the solute element molten steel that wick-containing center is enriched with along throwing direction reverse flow,
Solute element is set to be redistributed in molten steel, so that the solidification of strand more even compact, playing improves center segregation and subtract
The effect of few center porosity.The hydraulic system of withdrawal straightening machine with dynamic soft-reduction function is more complicated, and fault rate is high and repairs
It is difficult.Withdrawal straightening machine is under light pressure condition due to process control be present（The Accurate Determining of solidification end and automatic quick progress roll gap
Regulation）, its pulling rate is relatively slow.
Due to the change of the market demand, it is sometimes desirable to quickly produce common steel grade, it is sometimes desirable to produce fine quality steel, be
Raising utilization rate of equipment and installations, realizes the maximization of the performance of enterprises, it is desirable to billet caster has both had the ability of production ordinary steel,
There is the ability of production variety steel again, and requirement of both products to straightening hydraulic system is different, therefore design a kind of
Billet caster straightening hydraulic system with two kinds of operational modes is very important.
Utility model content
The purpose of this utility model is the drawback for prior art, there is provided a kind of double mode billet caster straightening
Hydraulic system, to improve utilization rate of equipment and installations, realize the maximization of the performance of enterprises.
Problem described in the utility model is realized with following technical proposals：
A kind of double mode billet caster straightening hydraulic system, composition are included respectively with billet caster per first-class
Each throwing frame upper pressure roller connected multiple throwing hydraulic cylinders and be connected with the upper pressure roller of every first-class frame of moulding adobe blocks
Mould adobe blocks hydraulic cylinder, and with each throwing hydraulic cylinder and hydraulic cylinder multiple hydraulic control systems correspondingly of moulding adobe blocks, Mei Gela
The hydraulic control system of base hydraulic cylinder includes slighter compress hydraulic pressure unit, and the hydraulic control system of part throwing frame is provided with routine
Hydraulic pressure unit.
Above-mentioned double mode billet caster straightening hydraulic system, the slighter compress hydraulic pressure unit commutate including model selection
Valve, hydraulic control one-way valve, servo valve and dual hydraulic control one-way valve, the P mouths of the servo valve by hydraulic control one-way valve welding system pressure oil,
T mouth connected tanks, A mouths and B mouths are connected with the ante-chamber and back cavity of corresponding throwing hydraulic cylinder respectively by dual hydraulic control one-way valve；The mould
Formula selects the P mouth welding system pressure oils of reversal valve, and T mouths connect control oil pipe, A mouths and B mouths control hydraulic control one-way valve and double hydraulic control list
Opening and closing to valve.
Above-mentioned double mode billet caster straightening hydraulic system, the conventional hydraulic unit include low-pressure relief valve, pressure
Power selection reversal valve, throwing select reversal valve and the voltage-controlled check valve of biliquid, the low-pressure relief valve to be kept to system pressure up and down
The P mouths of pressure selection reversal valve are sent into after low pressure, the T mouths of the pressure selection reversal valve connect high-pressure oil pipe, and A mouths are connect above and below throwing
The P mouths of reversal valve are selected, the throwing selects the T mouth connected tanks of reversal valve up and down, and A mouths and B mouths pass through the voltage-controlled check valve of biliquid
Connected respectively with the ante-chamber and back cavity of corresponding throwing hydraulic cylinder.
Above-mentioned double mode billet caster straightening hydraulic system, the hydraulic control system of the frame of moulding adobe blocks include low pressure
Overflow valve, high-pressure overflow valve, pressure selection valve, mould adobe blocks pressure-reducing valve and selection reversal valve up and down of moulding adobe blocks, the pressure-reducing valve of moulding adobe blocks will
System pressure is sent into the upper and lower P mouths and control oil pipe for selecting reversal valve of moulding adobe blocks after being kept to high pressure, and the P mouths of the pressure selection valve connect
Mould adobe blocks the control port of pressure-reducing valve, T mouths connect control oil pipe, and the A mouths of pressure selection valve connect the oil inlet and high pressure of low pressure relief valve
The oil-out of overflow valve, B mouths connect the oil-out of low pressure relief valve and the oil inlet of high-pressure overflow valve；The selection up and down of moulding adobe blocks is changed
To the T mouth connected tanks of valve, A mouths and B mouths are connected with the back cavity and ante-chamber of the hydraulic cylinder for frame of moulding adobe blocks respectively.
Above-mentioned double mode billet caster straightening hydraulic system, billet caster are equipped with a pressure regulation list per one stream
Member, the pressure regulation unit include high-pressure pressure-reducing valve and pressure gauge, and the high-pressure pressure-reducing valve is sent into after system pressure is kept into high pressure
The high-pressure oil pipe of conventional hydraulic unit, the pressure gauge are connected on the output end of high-pressure pressure-reducing valve.
Above-mentioned double mode billet caster straightening hydraulic system, the output end of the low-pressure relief valve are provided with throwing accumulation of energy
Device；The output end of the pressure-reducing valve of moulding adobe blocks is provided with accumulator of moulding adobe blocks.
Above-mentioned double mode billet caster straightening hydraulic system, the ante-chamber of the throwing hydraulic cylinder are provided with protection overflow
Valve.
Above-mentioned double mode billet caster straightening hydraulic system, the quantity of throwing frame during billet caster is often first-class
For six when, the throwing hydraulic cylinder that conventional hydraulic unit is provided with hydraulic control system is the first, second, the 4th and the 6th throwing
The throwing hydraulic cylinder of frame.
A kind of above-mentioned double mode billet caster straightening hydraulic system, the throwing accumulator and accumulator of moulding adobe blocks are
Bag type accumulator.
The utility model is provided with slighter compress hydraulic pressure unit and conventional liquid in billet caster is per one stream
The throwing frame hydraulic control system of unit is pressed, two kinds of hydraulic pressure units can switch over according to the species of product, thus significantly
Utilization rate of equipment and installations is improved, realizes the maximization of the performance of enterprises.
Brief description of the drawings
Fig. 1 is billet caster Hydraulic System Principle block diagram；
Fig. 2 is the hydraulic schematic diagram of pressure regulation unit；
Fig. 3 is the hydraulic control system of the first, second, the 4th and the 6th throwing frame；
Fig. 4 is the hydraulic control system of the three, the 5th throwing frames；
Fig. 5 is straightening hydraulic cylinder and mould adobe blocks hydraulic cylinder and the connection figure of straightening frame.
Marked in figure as follows：The throwing frame of 1~6, first throwing frame~the 6th, 7, pressure regulation unit, 8, throwing hydraulic cylinder,
9th, hydraulic control system, 10, upper pressure roller, 11, frame of moulding adobe blocks, 12, hydraulic cylinder of moulding adobe blocks, 13, high-pressure pressure-reducing valve, 14, pressure gauge,
15th, low-pressure relief valve, 16, pressure selection reversal valve, 17, throwing select reversal valve up and down, 18, throwing accumulator, 19, Double-hydraulic
Control check valve, 20, model selection reversal valve, 21, hydraulic control one-way valve, 22, servo valve, 23, dual hydraulic control one-way valve, 24, protection overflows
Flow valve, 25, slighter compress hydraulic pressure unit, 26, conventional hydraulic unit, 27, selection reversal valve up and down of moulding adobe blocks, 28, pressure-reducing valve of moulding adobe blocks,
29th, pressure selection valve, 30, high-pressure overflow valve, 31, low pressure relief valve, 32, accumulator of moulding adobe blocks.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings.
The utility model provide it is a kind of can fast and easy produce the conticaster of common steel grade and can production high-quality steel
Straightening hydraulic system, often stream has six throwing frames to billet caster（That is the throwing frame 6 of the first throwing frame the 1~the 6th）With
One frame 11 of moulding adobe blocks, six throwing frames are densely arranged and are respectively provided with slighter compress function（It is equipped with slighter compress hydraulic pressure list
Member）, wherein conventional hydraulic unit is provided with the hydraulic control system of the first, second, the 4th and the 6th throwing frame, each machine
Pressure roller and lower compression roller are installed, upper pressure roller joins hydraulic cylinder on frame（The upper pressure roller of throwing frame joins throwing hydraulic cylinder 8, takes off
The upper pressure roller of base frame, which joins, pulls base hydraulic cylinder 12）, the hydraulic cylinder of each frame has a corresponding hydraulic control system
9, there is a shared pressure regulation unit 7 per six throwing frames of one stream.
When producing common steel grade, pass through the switching of general mode, the liquid of the first, second, the 4th and the 6th throwing frame
Pressure cylinder piston bar moves up with corresponding upper pressure roller, is allowed in a high position, does not participate in and draws steel production, only the remaining 3rd, the
The throwing roller of five throwing frames participates in production, when producing variety steel, is switched to slighter compress pattern, the first throwing frame~6
The throwing roller of throwing frame all participates in production, is controlled by the servo valve of hydraulic system, to reach required roll gap
Size, drafts expected from realization.Reaching improves the purpose of small billet steel billet quality.
Pressure regulation unit and all hydraulic cylinder hydraulic control system are all arranged in hydraulic station, throwing accumulator 18 and storage of moulding adobe blocks
Energy device 32 is bag type accumulator, plays accumulation of energy, pressurize and improves servo valve response speed.In the pressure regulation shown in Fig. 2
In unit, system pressure P（10MPa）, system pressure is kept to PD (high pressure 6MPa) by high-pressure pressure-reducing valve 13, and shown in Fig. 3
First, in the hydraulic control system of the second, the 4th and the 6th throwing frame, low-pressure relief valve 15 is system pressure P（10MPa）It is kept to
Low pressure（3MPa）, it is corresponding to produce common steel grade and production high-quality steel grade.
Operation principle of the present utility model is as follows：
1. general mode
Referring to Fig. 3, in the hydraulic control system of the first, second, the 4th and the 6th throwing frame, 3DT dead electricity, pattern is selected
Select reversal valve 20 and just pass through double hydraulic control in right position, hydraulic control one-way valve 21, the locking of dual hydraulic control one-way valve 23, slighter compress hydraulic pressure unit 25
Check valve 23 disconnects with throwing hydraulic cylinder 8,1DT dead electricity, 2DT obtain it is electric, pressure selection reversal valve 16 be in high pressure in left position, system
（6MPa）State, 4DT obtain electric, 5DT dead electricity, and throwing selects reversal valve 17 to be drawn in right position, the first, second, the 4th and the 6th up and down
The hydraulic cylinder piston rod of base frame moves up with upper pressure roller 10, is allowed in a high position.
Referring to Fig. 4, in the hydraulic control system of the three, the 5th throwing frames, 3DT obtains electric, model selection reversal valve 20
In left position, servo valve 22 makes the piston rod of the throwing hydraulic cylinder 8 of the three, the 5th throwing frames pop-up under automatically controlled signal effect
Roller pull-up, the upper supporting roller in the three, the 5th throwing frames is set to be in a high position, then 3DT dead electricity, model selection reversal valve 20 is on the right side
Position, hydraulic control one-way valve 21 and the locking of dual hydraulic control one-way valve 23, therefore the three, the 5th throwing frame Hydrauservo Systems are in a high position certainly
Lock status.
Referring to Fig. 5,7DT obtains electric, and pressure selection valve 29 is upper, and high-pressure overflow valve 30 works, and pressure-reducing valve 28 of moulding adobe blocks is to being
System pressure（10MPa）Hydraulic system pressure after decompression is high pressure（6MPa）State, 8DT obtain electric, selection reversal valve up and down of moulding adobe blocks
27 lift in left position, upper roller of moulding adobe blocks.Thus having carried out send dummy ingot to prepare.
Dummy bar is sent into straightening frame, when the dummy bar head of dummy bar enters between the up-down rollers of the 6th throwing frame, 5
DT obtains electric, 4DT dead electricity, and throwing selects reversal valve 17 to be depressed in left position, the throwing hydraulic cylinder 8 of the 6th throwing frame up and down, with
When dummy bar is sequentially entered between the four, the second, first throwing frame up-down rollers, the throwing of the four, the second, first throwing frame
Hydraulic cylinder is depressed successively, and dummy bar is admitted to crystallizer, and drawing steel preparation so far in the normal mode is ready.
When starting to draw steel, dummy bar head hauls 9DT when steel billet enters the pressure range for roller of moulding adobe blocks and obtains electric, 8DT dead electricity, moulds adobe blocks
Selection reversal valve 27 disengages steel billet and dummy bar head under right position, roll-in of moulding adobe blocks up and down, while 7DT dead electricity, low pressure relief valve 31
Work, hydraulic cylinder of moulding adobe blocks are in low pressure（3MPa）State.2DT dead electricity, 1DT obtain electric, and pressure selects reversal valve 16 in right position, the
First, the hydraulic cylinder of the second, the 4th and the 6th throwing frame is also at low pressure（3MPa）State, until drawing steel to terminate.
2. slighter compress pattern
In the hydraulic control system of the first, second, the 4th and the 6th throwing frame, 4DT dead electricity, 5DT also dead electricity, throwing
Selection reversal valve 17 is in middle position up and down, the locking of dual hydraulic control one-way valve 19, the voltage-controlled check valve 19 of biliquid conventional hydraulic unit 26 and
Throwing hydraulic cylinder 8 disconnects, while 3DT obtains electric, and model selection reversal valve 20 is in left position, hydraulic control one-way valve 21, dual hydraulic control one-way valve
23 are unlocked, and slighter compress hydraulic pressure unit 25 is connected with throwing hydraulic cylinder 8, while the hydraulic control system of the three, the 5th throwing frames
Middle 3DT obtains electric, and model selection reversal valve 20 is unlocked in left position, hydraulic control one-way valve 21 and dual hydraulic control one-way valve 23, and the three, the 5th draw
The slighter compress hydraulic pressure unit 25 of base frame is connected with hydraulic cylinder.
Referring to Fig. 5, when sending dummy ingot, pressure selection valve 29 is upper, and high-pressure overflow valve 30 works, and pressure-reducing valve 28 of moulding adobe blocks is right
System pressure（10MPa）Hydraulic system pressure after decompression is high pressure（6MPa）State, 8DT obtain electric, 9DT dead electricity, mould adobe blocks up and down
Selection reversal valve 27 lifts in left position, upper roller of moulding adobe blocks.Six, the five, the four, the three, the second, the upper pressure roller of the first throwing frame
Lifted successively in the presence of corresponding servo valve, when the dummy bar head of dummy bar is entered between frame up-down rollers, corresponding machine
The electric signal of frame is acted on corresponding servo valve, the throwing hydraulic cylinder 8 of the frame is driven upper pressure roller pressure.So complete to send
The operation of dummy ingot.
When start draw steel when, dummy bar head haul steel billet enter mould adobe blocks roller pressure range when, 9DT obtains electric, 8DT dead electricity, take off
Base selects reversal valve 27 in right position up and down, and the upper pressure roller pressure for frame of moulding adobe blocks disengages steel billet and dummy bar head, at the same 7DT obtain it is electric,
Pressure selection valve 29 works in bottom, low pressure relief valve 31, and hydraulic cylinder of moulding adobe blocks is in low pressure（3MPa）State.Slighter compress pattern
Under, Ju is according to roll gap technological parameter corresponding to different steel grades, by electric signal to the throwing frame hydraulic pressure of the first throwing frame~the 6th
The servo valve of system is controlled, to reach required roll gap size, drafts expected from realization.Improve small side so as to reach
The purpose of base steel billet quality.
Claims (9)
1. a kind of double mode billet caster straightening hydraulic system, it is characterized in that, composition include respectively with continuous small-billet casting
Machine is per the connected multiple throwing hydraulic cylinders of the upper pressure roller of first-class each throwing frame（8）With with every first-class frame of moulding adobe blocks（11）
The connected hydraulic cylinder of moulding adobe blocks of upper pressure roller（12）, and with each throwing hydraulic cylinder（8）With hydraulic cylinder of moulding adobe blocks（12）Correspond
Multiple hydraulic control systems, each throwing hydraulic cylinder（8）Hydraulic control system include slighter compress hydraulic pressure unit（25）, portion
The hydraulic control system of throwing frame is divided to be provided with conventional hydraulic unit（26）.
2. a kind of double mode billet caster straightening hydraulic system according to claim 1, it is characterized in that, the light pressure
Lower hydraulic pressure unit（25）Including model selection reversal valve（20）, hydraulic control one-way valve（21）, servo valve（22）And dual hydraulic control one-way valve
（23）, the servo valve（22）P mouths pass through hydraulic control one-way valve（21）Welding system pressure oil, T mouth connected tanks, A mouths and B mouths pass through
Dual hydraulic control one-way valve（23）Respectively with corresponding throwing hydraulic cylinder（8）Ante-chamber connected with back cavity；The model selection reversal valve
（20）P mouth welding system pressure oils, T mouths connect control oil pipe, A mouths and B mouths control hydraulic control one-way valve（21）And dual hydraulic control one-way valve
（23）Opening and closing.
3. a kind of double mode billet caster straightening hydraulic system according to claim 2, it is characterized in that, the routine
Hydraulic pressure unit（26）Including low-pressure relief valve（15）, pressure selection reversal valve（16）, throwing up and down select reversal valve（17）With it is double
Hydraulic pressure control check valve（19）, the low-pressure relief valve（15）System pressure is kept to be sent into pressure selection reversal valve after low pressure（16）
P mouths, the pressure selects reversal valve（16）T mouths connect high-pressure oil pipe, A mouths connect throwing and select reversal valve up and down（17）P mouths,
The throwing selects reversal valve up and down（17）T mouth connected tanks, A mouths and B mouths pass through the voltage-controlled check valve of biliquid（19）Respectively with it is right
Answer throwing hydraulic cylinder（8）Ante-chamber connected with back cavity.
4. a kind of double mode billet caster straightening hydraulic system according to claim 3, it is characterized in that, it is described to mould adobe blocks
The hydraulic control system of frame includes low pressure relief valve（31）, high-pressure overflow valve（30）, pressure selection valve（29）, pressure-reducing valve of moulding adobe blocks
（28）With selection reversal valve up and down of moulding adobe blocks（27）, the pressure-reducing valve of moulding adobe blocks（28）On system pressure is kept to be sent into after high pressure moulding adobe blocks
Lower selection reversal valve（27）P mouths and control oil pipe, the pressure selection valve（29）P mouths connect pressure-reducing valve of moulding adobe blocks（28）Control
Hydraulic fluid port, T mouths connect control oil pipe, pressure selection valve（29）A mouths connect low pressure relief valve（31）Oil inlet and high-pressure overflow valve
（30）Oil-out, B mouths connect low pressure relief valve（31）Oil-out and high-pressure overflow valve（30）Oil inlet；It is described to mould adobe blocks up and down
Select reversal valve（27）T mouth connected tanks, A mouths and B mouths respectively with frame of moulding adobe blocks（11）The back cavity of hydraulic cylinder connected with ante-chamber.
5. a kind of double mode billet caster straightening hydraulic system according to claim 4, it is characterized in that, small billet connects
Casting machine is equipped with a pressure regulation unit per one stream（7）, the pressure regulation unit（7）Including high-pressure pressure-reducing valve（13）And pressure gauge
（14）, the high-pressure pressure-reducing valve（13）Conventional hydraulic unit is sent into after system pressure is kept into high pressure（26）High-pressure oil pipe, institute
State pressure gauge（14）It is connected on high-pressure pressure-reducing valve（13）Output end.
6. a kind of double mode billet caster straightening hydraulic system according to claim 5, it is characterized in that, the low pressure
Pressure-reducing valve（15）Output end be provided with throwing accumulator（18）；The pressure-reducing valve of moulding adobe blocks（28）Output end be provided with and mould adobe blocks accumulator
（32）.
7. a kind of double mode billet caster straightening hydraulic system according to claim 6, it is characterized in that, the throwing
Hydraulic cylinder（8）Ante-chamber be provided with protection overflow valve（24）.
8. a kind of double mode billet caster straightening hydraulic system according to claim 7, it is characterized in that, small billet connects
When the quantity of throwing frame is six in the every one stream of casting machine, conventional hydraulic unit is provided with hydraulic control system（26）Throwing liquid
Cylinder pressure（8）For the throwing hydraulic cylinder of the first, second, the 4th and the 6th throwing frame.
9. a kind of double mode billet caster straightening hydraulic system according to claim 8, it is characterized in that, the throwing
Accumulator（18）With accumulator of moulding adobe blocks（32）It is bag type accumulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720382343.8U CN206682086U (en) | 2017-04-12 | 2017-04-12 | A kind of double mode billet caster straightening hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720382343.8U CN206682086U (en) | 2017-04-12 | 2017-04-12 | A kind of double mode billet caster straightening hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206682086U true CN206682086U (en) | 2017-11-28 |
Family
ID=60398877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720382343.8U Withdrawn - After Issue CN206682086U (en) | 2017-04-12 | 2017-04-12 | A kind of double mode billet caster straightening hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206682086U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110394434A (en) * | 2019-08-06 | 2019-11-01 | 北京首钢国际工程技术有限公司 | A kind of big pressure rolling mill screwdown roller hydraulic control valve platform of continuous casting billet |
-
2017
- 2017-04-12 CN CN201720382343.8U patent/CN206682086U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110394434A (en) * | 2019-08-06 | 2019-11-01 | 北京首钢国际工程技术有限公司 | A kind of big pressure rolling mill screwdown roller hydraulic control valve platform of continuous casting billet |
| CN110394434B (en) * | 2019-08-06 | 2024-03-29 | 北京首钢国际工程技术有限公司 | Continuous casting billet large-reduction rolling mill reduction roll hydraulic control valve table |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20171128 Effective date of abandoning: 20220705 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20171128 Effective date of abandoning: 20220705 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |