CN209671325U - Mating trailer wheels are to hydraulic control system after shield machine - Google Patents
Mating trailer wheels are to hydraulic control system after shield machine Download PDFInfo
- Publication number
- CN209671325U CN209671325U CN201920420436.4U CN201920420436U CN209671325U CN 209671325 U CN209671325 U CN 209671325U CN 201920420436 U CN201920420436 U CN 201920420436U CN 209671325 U CN209671325 U CN 209671325U
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- Prior art keywords
- valve
- shield machine
- oil
- mating
- solenoid
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- 230000013011 mating Effects 0.000 title claims abstract description 50
- 238000006073 displacement reaction Methods 0.000 claims abstract description 24
- 238000012544 monitoring process Methods 0.000 claims abstract description 13
- 239000002828 fuel tank Substances 0.000 claims abstract description 7
- 239000012530 fluid Substances 0.000 claims abstract description 6
- 238000001914 filtration Methods 0.000 claims description 6
- 241000736199 Paeonia Species 0.000 claims 1
- 235000006484 Paeonia officinalis Nutrition 0.000 claims 1
- 239000003921 oil Substances 0.000 description 55
- 239000000446 fuel Substances 0.000 description 5
- 239000010720 hydraulic oil Substances 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 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
- 230000000750 progressive effect Effects 0.000 description 1
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Abstract
The utility model discloses mating trailer wheels after a kind of shield machine to hydraulic control system, the technical problem that the rear mating trailer walking stability for solving existing shield machine is poor, control is complicated for operation.The utility model includes motor-driven hydraulic pump, the oil inlet of hydraulic pump is connected with fuel tank, oil outlet and is connected with hydraulic control valve and leveling cyclinder in turn by fluid pressure line, the telescoping cylinder of the leveling cyclinder and the wheel of trailer mating after shield machine are to being connected, leveling cyclinder is built-in with the displacement sensor of monitoring telescoping cylinder movement, displacement sensor is connected with PLC control unit, the hydraulic control valve includes solenoid directional control valve and Solenoid ball valve, and solenoid directional control valve and Solenoid ball valve are connected with PLC control unit.The utility model is easy to operate, monitoring is accurate, feedback is timely, erection rate is fast, can make after shield machine that mating trailer is stable, walks exactly along set direction.
Description
Technical field
The utility model relates to take turns to technical field of hydraulic, mating trailer wheels are to liquid after particularly relating to a kind of shield machine
Pressure control system.
Background technique
With being constantly progressive for human civilization, urban ground traffic more attracts attention to the pollution problem of environment how
More efficiently utilizing to Urban Underground Space Excavation becomes the problem of industry is paid close attention to, in the constructing of city tunnel, shield method
Construction quality that urban ground traffic, city dweller normally live and obtained and high speed of application etc. are not influenced because having
Feature, rapid Popularization And Development.
The walking manner of mating trailer is mainly divided to rail and two kinds of trackless after shield machine, and trackless walking refers to using glue coating wheel
Directly walking on section of jurisdiction, which eliminate the track cost of long range, saved track change step the time, from economy
From the aspects of high efficiency two, opposite rail walking has advantage outstanding, therefore, the trackless walking manner of glue coating wheel at
For mainstay matched after shield.But the travelling control of glue coating wheel and the HYDRAULIC CONTROL SYSTEM stability to match it is poor,
It controls complicated for operation.
Utility model content
For the deficiency in above-mentioned background technique, the utility model proposes mating trailer wheels after a kind of shield machine to hydraulic control
System processed, the technical problem that the rear mating trailer walking stability for solving existing shield machine is poor, control is complicated for operation.
Mating trailer wheels are to hydraulic control system after the technical solution of the utility model is achieved in that a kind of shield machine
System, including motor-driven hydraulic pump, the oil inlet of hydraulic pump is connected with fuel tank, oil outlet is connected in turn by fluid pressure line
Hydraulic control valve and leveling cyclinder, the telescoping cylinder of the leveling cyclinder, to being connected, pass through liquid with the wheel of trailer mating after shield machine
Control of the press pump to leveling cyclinder, can easily adjust the state of the wheel pair of mating trailer after shield machine, and then prevent shield
The rear mating trailer skew of machine deviates set direction.Leveling cyclinder is built-in with the displacement sensor of monitoring telescoping cylinder movement, displacement
Sensor is connected with PLC control unit, and the state of displacement sensor can be monitored in real time in PLC control unit, and then can be accurate
Quickly learn the operating status of rear mating trailer.The hydraulic control valve includes solenoid directional control valve and Solenoid ball valve, PLC control
Unit processed can control solenoid directional control valve and Solenoid ball valve, and then be capable of the working condition of automatically controlled leveling cyclinder.Solenoid directional control valve,
Solenoid ball valve and displacement sensor are connected with PLC control unit, form a closed control loop, PLC control unit pair
The monitoring signals of the displacement sensor received carry out processing judgement, then control solenoid directional control valve and Solenoid ball valve is made accordingly
Adjustment compensating movement, and then rear mating trailer can be made voluntarily to correct, steadily walked according to set direction.
Further, horizon detector, horizon detector and PLC control unit phase are provided with after shield machine on mating trailer
Even, the horizon detector and displacement sensor pass through PID controller and communicate with PLC control unit, horizon detector and position
The operating status of displacement sensor mating trailer after monitoring jointly, and real-time Transmission is to PLC control unit, PLC control unit root
According to the signal synchronously control Solenoid ball valve and electromagnetic switch valve events received.
Further, the leveling cyclinder is double-outlet cylinder, double-outlet cylinder include symmetrical the first oil pocket and
The longitudinal section area equation of second oil pocket, the first oil pocket and the second oil pocket ensure that left and right wheels to the accuracy of tuning.Electromagnetism changes
It is arranged in front of Solenoid ball valve to valve, there are two output oil pipe, one of output oil pipe and the first oil for solenoid directional control valve setting
Chamber is connected, another output oil pipe is connected with the oil inlet of Solenoid ball valve, and the oil outlet of Solenoid ball valve is connected with the second oil pocket.
PLC control unit controls Solenoid ball valve and solenoid directional control valve respectively and carries out oil-feeding control to the first oil pocket and the second oil pocket, sufficiently
It ensure that the accuracy of leveling control.
Further, a left side is provided at left and right sides of the left and right sides of rear mating trailer front and rear mating trailer rear portion
Right two pairs of two wheels pair, each wheel is to being above provided with a double-outlet cylinder, two opposite double-outlet cylinders of left and right
The first oil pocket be connected with the same solenoid directional control valve, the second oil pocket of two opposite double-outlet cylinders of left and right is connected separately with
One Solenoid ball valve is connected between two Solenoid ball valves by oil pipe.It is opposite to two or so using the same solenoid directional control valve
The first oil pocket fuel feeding, fuel feeding demand, save the cost can either be met, and can individually regulate and control double-outlet cylinder, the synchronization of side
Regulate and control the double-outlet cylinder of two sides.Second oil pocket of two opposite double-outlet cylinders of left and right is connected separately with an electromagnetic ball
Valve is connected between two Solenoid ball valves by oil pipe, it can be ensured that in leveling, the displacement of the double-outlet cylinder of the left and right sides
It is equal, it is ensured that wheel does not suppress power to operation synchronization.
Further, superposition balanced valve is provided between the solenoid directional control valve and Solenoid ball valve.Superposition balanced valve is answered
With that can balance the load, keep the operation of double-outlet cylinder more steady, while being superimposed balanced valve to carry out double-outlet cylinder
Pressure maintaining keeps load.
Further, it is provided with filter between the hydraulic pump and solenoid directional control valve, is arranged between fuel tank and hydraulic pump
There is oil suction filter core.Filter and oil suction filter core play the role of hydraulic oil filtering jointly, and double-filtration has fully ensured that hydraulic oil
Cleannes.
Further, safe valve group is provided between the filter and hydraulic pump, safe valve group is opening and closing element, not by outer
Power effect is lower to be in normally off, when the hydraulic fluid pressure in oil pipe, which increases, is more than specified value, passes through the relief liquor to outside system
Pressure oil is come to prevent pressure in pipeline be more than specified value.Speed governing valve is provided between filter and solenoid directional control valve.Speed governing valve
It is the combination valve being connected in series by uniform-pressure-drop valve and throttle valve, throttle valve is used to adjust the flow passed through, and uniform-pressure-drop valve is then
The influence of automatic compensation load variation, makes the pressure difference definite value before and after throttle valve, eliminates influence of the load variation to flow.
Further, check valve is provided between the solenoid directional control valve and speed governing valve, check valve substantially avoids hydraulic
Oil reflux.
The utility model is easy to operate, monitoring is accurate, feedback is timely, erection rate is fast, can make mating after shield machine drag
Vehicle is stable, walks exactly along set direction.Solenoid directional control valve, Solenoid ball valve, horizon detector and displacement sensor with
PLC control unit is connected, and forms closed control loop, PLC control unit is to the displacement sensor received and horizontal detection
The monitoring signals of instrument carry out processing judgement, then control solenoid directional control valve and Solenoid ball valve makes corresponding adjustment compensating movement,
And then rear mating trailer can be made voluntarily to correct, steadily walk according to set direction.The utility model can be controlled with PLC
It is remotely monitored, can be passed by the inclination angle of horizon detector real-time monitoring trailer by displacement on the connected host computer of unit
Stroke of the sensor real-time monitoring wheel to oil cylinder.The control model of the utility model is divided into automatically and manually control model, automatic to control
Under molding formula, system calculates leveling cyclinder direction of action and actuating length according to tilt angle automatically；Under MANUAL CONTROL mode,
Operator can be artificial according to tilt angle set target value, then system is controlled according to the target value of setting.
Detailed description of the invention
It, below will be to attached drawing needed in embodiment description in order to illustrate more clearly of the utility model embodiment
It is briefly described, it should be apparent that, the drawings in the following description are merely some embodiments of the present invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is the hydraulic principle figure of the utility model；
Fig. 2 is the front view of the utility model hydraulic control valve；
Fig. 3 is the side view of Fig. 2；
Fig. 4 is the rearview of Fig. 2.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are under that premise of not paying creative labor
Every other embodiment obtained, fall within the protection scope of the utility model.
Embodiment 1, mating trailer wheels are to hydraulic control system after a kind of shield machine, as shown in Figs 1-4, including 1 band of motor
Dynamic hydraulic pump 5, the oil inlet of hydraulic pump 5 are connected with fuel tank 2, oil outlet and are connected with hydraulic control valve in turn by fluid pressure line
With leveling cyclinder 16, the telescoping cylinder of leveling cyclinder 16 and the wheel of trailer mating after shield machine are to being connected.It is leveled by 5 Duis of hydraulic pump
The fuel feeding of oil cylinder 16, can easily adjust the state of the wheel pair of mating trailer after shield machine, and then prevent the rear of shield machine from matching
It covers trailer skew and deviates set direction.
The leveling cyclinder 16 is built-in with the displacement sensor of monitoring telescoping cylinder movement, and displacement sensor is connected with PLC control
The data that displacement sensor monitors can be monitored in real time in unit processed, PLC control unit, and then after accurately capable of quickly learning
The operating status of mating trailer.
The hydraulic control valve includes the solenoid directional control valve 12 and Solenoid ball valve 14 assembled by valve block 15, and PLC control is single
Member can control the movement of solenoid directional control valve 12 and Solenoid ball valve 14, and then be capable of the working condition of automatically controlled leveling cyclinder 16.Electricity
Magnetic reversal valve 12, Solenoid ball valve 14 and displacement sensor are connected with PLC control unit, form a closed control loop,
PLC control unit carries out processing judgement to the monitoring signals of the displacement sensor received, then controls 12 He of solenoid directional control valve
Solenoid ball valve 14 makes corresponding adjustment compensating movement, and then rear mating trailer can be made voluntarily to correct, steadily according to set
Direction walking.
Further, horizon detector, horizon detector and PLC control unit phase are provided with after shield machine on mating trailer
Even, the horizon detector and displacement sensor pass through PID controller and communicate with PLC control unit.Horizon detector and position
The operating status of displacement sensor mating trailer after monitoring jointly, and real-time Transmission is to PLC control unit, PLC control unit root
According to the movement of the signal synchronously control Solenoid ball valve 14 and solenoid directional control valve 12 that receive.The setting of horizon detector is further protected
Wheel has been demonstrate,proved to the reliability of leveling.
Embodiment 2, for mating trailer wheels to hydraulic control system, the leveling cyclinder 16 is double rods oil after a kind of shield machine
Cylinder, double-outlet cylinder include symmetrical the first oil pocket and the second oil pocket, the longitudinal section area of the first oil pocket and the second oil pocket
It is equal, it ensure that left and right wheels to the accuracy of tuning.
The front of Solenoid ball valve 14 is arranged in the solenoid directional control valve 12, and there are two output oil for the setting of solenoid directional control valve 12
Pipe, one of output oil pipe are connected with the first oil pocket, another output oil pipe is connected with the oil inlet of Solenoid ball valve 14, electromagnetism
The oil outlet of ball valve 14 is connected with the second oil pocket.PLC control unit controls Solenoid ball valve 14 and solenoid directional control valve 12 to respectively
One oil pocket and the second oil pocket carry out oil-feeding control, have fully ensured that the accuracy of leveling control.
Two pairs of left and right is provided at left and right sides of the left and right sides of mating trailer front and rear mating trailer rear portion afterwards
Two wheels pair, for each wheel to a double-outlet cylinder is above provided with, the first of two opposite double-outlet cylinders of left and right is oily
Chamber is connected with the same solenoid directional control valve 12, and the second oil pocket of two opposite double-outlet cylinders of left and right is connected separately with an electricity
Magnetic ball valve 14 is connected between two Solenoid ball valves 14 by oil pipe.It is opposite to two or so using the same solenoid directional control valve 12
The first oil pocket fuel feeding, fuel feeding demand, save the cost can either be met, and can individually regulate and control the double-outlet cylinder 16, same of side
The double-outlet cylinder 16 of step control two sides.Second oil pocket of two opposite double-outlet cylinders 16 of left and right is connected separately with an electricity
Magnetic ball valve 14 is connected between two Solenoid ball valves 14 by oil pipe, it can be ensured that in leveling, the double-outlet cylinder of the left and right sides
16 displacement is equal, it is ensured that wheel does not suppress power to operation synchronization.
The other structures of the present embodiment are same as Example 1.
There are two types of action modes for the present embodiment known to above design:
1, linkage pattern is then
PLC control unit control is respectively connected with two upper double-outlet cylinders 16 with rear mating trailer front or rear wheel
Two Solenoid ball valves 14 power off simultaneously, then two double-outlet cylinders 16 are connected to by two Solenoid ball valves 14, at this point, PLC is controlled
Unit control solenoid directional control valve 12 processed works, can be with synchronously control two double rods by the left and right position switching of solenoid directional control valve 12
Oil cylinder 16 adjusts, and realizes the left and right tuning of wheel pair.
2, single control mode
PLC control unit control distinguishes phase to two upper double-outlet cylinders with rear mating trailer front or one, rear portion wheel
A Solenoid ball valve 14 even obtains electric, 14 power loss of Solenoid ball valve, at this point, PLC control unit controls 12 work of solenoid directional control valve
Make, a double-outlet cylinder 16 can individually be controlled by the left and right position switching of solenoid directional control valve 12 and adjusted, realize wheel centering
The independent control of one wheel.
Embodiment 3, mating trailer wheels are to hydraulic control system, the solenoid directional control valve 12 and electromagnetic ball after a kind of shield machine
Superposition balanced valve 13 is provided between valve 14.The application of superposition balanced valve 13 can balance the load, and make the operation of double-outlet cylinder
It is more steady, while being superimposed balanced valve 13 can be such that load keeps double-outlet cylinder progress pressure maintaining.
The other structures of the present embodiment are identical as embodiment 1 or 2.
Embodiment 4, mating trailer wheels are to hydraulic control system, the hydraulic pump 5 and solenoid directional control valve after a kind of shield machine
It is provided with filter 9 between 12, ball valve 8 is provided between filter 9 and hydraulic pump 5.It is provided between fuel tank 2 and hydraulic pump 5
Oil suction filter core 3 and butterfly valve 4.Filtering 9 and oil suction filter core 3 play the role of hydraulic oil filtering jointly, and double-filtration has fully ensured that liquid
The cleannes of pressure oil.
The other structures of the present embodiment are identical as embodiment 1 or 2 or 3.
Embodiment 5, mating trailer wheels are to hydraulic control system after a kind of shield machine, between the filter 9 and hydraulic pump 5
It is provided with safe valve group 6, safe valve group 6 is connected with oil pressure gauge 7.Safe valve group 6 is opening and closing element, not in normal under by external force
Closed state, when the hydraulic fluid pressure in oil pipe, which increases, is more than specified value, by outside system relief liquor pressure oil prevent pipeline
Interior pressure is more than specified value.Speed governing valve 11 is provided between filter 9 and solenoid directional control valve 12.Speed governing valve 11 is by surely poor
The combination valve that pressure reducing valve and throttle valve are connected in series, throttle valve are used to adjust the flow passed through, and uniform-pressure-drop valve then compensates automatically
The influence for loading variation, makes the pressure difference definite value before and after throttle valve, eliminates influence of the load variation to flow.
The other structures of the present embodiment are same as Example 4.
Embodiment 6, mating trailer wheels are to hydraulic control system, the solenoid directional control valve 12 and speed governing valve after a kind of shield machine
Check valve 10 is provided between 11, check valve 10 substantially avoids hydraulic oil reflux.
The other structures of the present embodiment are same as Example 5.
The not detailed place of the utility model is conventional technical means known in those skilled in the art.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection scope within.
Claims (8)
1. mating trailer wheels are to hydraulic control system after a kind of shield machine, including the hydraulic pump (5) that motor (1) drives, hydraulic pump
(5) oil inlet is connected with fuel tank (2), oil outlet and is connected with hydraulic control valve and leveling cyclinder in turn by fluid pressure line
(16), it is characterised in that: the telescoping cylinder of the leveling cyclinder (16) and the wheel of trailer mating after shield machine are to being connected, leveling cyclinder
(16) it is built-in with the displacement sensor of monitoring telescoping cylinder movement, displacement sensor is connected with PLC control unit, the hydraulic control
Valve includes solenoid directional control valve (12) and Solenoid ball valve (14), and solenoid directional control valve (12) and Solenoid ball valve (14) control with PLC single
Member is connected.
2. mating trailer wheels are to hydraulic control system after shield machine according to claim 1, it is characterised in that: after shield machine
Horizon detector is provided on mating trailer, horizon detector is connected with PLC control unit, and the horizon detector and displacement pass
Sensor passes through PID controller and communicates with PLC control unit.
3. mating trailer wheels are to hydraulic control system after shield machine according to claim 2, it is characterised in that: the leveling
Oil cylinder (16) is double-outlet cylinder, and double-outlet cylinder includes symmetrical the first oil pocket and the second oil pocket, solenoid directional control valve
(12) setting is in the front of Solenoid ball valve (14), and there are two output oil pipe, one of output oil for solenoid directional control valve (12) setting
Pipe be connected with the first oil pocket, another output oil pipe is connected with the oil inlet of Solenoid ball valve (14), Solenoid ball valve (14) it is fuel-displaced
Mouth is connected with the second oil pocket.
4. mating trailer wheels are to hydraulic control system after shield machine according to claim 3, it is characterised in that: mating afterwards to drag
Two wheels pair of two pairs of left and right, each wheel are provided at left and right sides of the left and right sides in Chinese herbaceous peony portion and rear mating trailer rear portion
To being above provided with a double-outlet cylinder, the first oil pocket and the same electromagnetic switch of two opposite double-outlet cylinders of left and right
Valve (12) is connected, and the second oil pocket of two opposite double-outlet cylinders of left and right is connected separately with a Solenoid ball valve (14), and two
It is connected between Solenoid ball valve (14) by oil pipe.
5. mating trailer wheels are to hydraulic control system after shield machine according to claim 4, it is characterised in that: the electromagnetism
Superposition balanced valve (13) is provided between reversal valve (12) and Solenoid ball valve (14).
6. mating trailer wheels are to hydraulic control system after shield machine according to claim 1-5, it is characterised in that:
It is provided with filter (9) between the hydraulic pump (5) and solenoid directional control valve (12), is provided between fuel tank (2) and hydraulic pump (5)
Oil suction filter core (3).
7. mating trailer wheels are to hydraulic control system after shield machine according to claim 6, it is characterised in that: the filtering
It is provided between device (9) and hydraulic pump (5) safe valve group (6), is provided with speed regulation between filter (9) and solenoid directional control valve (12)
Valve (11).
8. mating trailer wheels are to hydraulic control system after shield machine according to claim 7, it is characterised in that: the electromagnetism
Check valve (10) are provided between reversal valve (12) and speed governing valve (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920420436.4U CN209671325U (en) | 2019-03-29 | 2019-03-29 | Mating trailer wheels are to hydraulic control system after shield machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920420436.4U CN209671325U (en) | 2019-03-29 | 2019-03-29 | Mating trailer wheels are to hydraulic control system after shield machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209671325U true CN209671325U (en) | 2019-11-22 |
Family
ID=68573197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920420436.4U Withdrawn - After Issue CN209671325U (en) | 2019-03-29 | 2019-03-29 | Mating trailer wheels are to hydraulic control system after shield machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209671325U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109812470A (en) * | 2019-03-29 | 2019-05-28 | 中铁工程装备集团有限公司 | Mating trailer wheels are to hydraulic control system after a kind of shield machine |
| CN113156880A (en) * | 2021-02-02 | 2021-07-23 | 中船第九设计研究院工程有限公司 | Hydraulic trolley control system |
-
2019
- 2019-03-29 CN CN201920420436.4U patent/CN209671325U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109812470A (en) * | 2019-03-29 | 2019-05-28 | 中铁工程装备集团有限公司 | Mating trailer wheels are to hydraulic control system after a kind of shield machine |
| CN109812470B (en) * | 2019-03-29 | 2024-01-19 | 中铁工程装备集团有限公司 | Hydraulic control system for rear matched trailer wheel pair of shield tunneling machine |
| CN113156880A (en) * | 2021-02-02 | 2021-07-23 | 中船第九设计研究院工程有限公司 | Hydraulic trolley control system |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20191122 Effective date of abandoning: 20240119 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20191122 Effective date of abandoning: 20240119 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |