CN206158749U - Secretly dig platform truck drilling depth control system and secretly dig platform truck drilling equipment - Google Patents
Secretly dig platform truck drilling depth control system and secretly dig platform truck drilling equipment Download PDFInfo
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- CN206158749U CN206158749U CN201621033647.5U CN201621033647U CN206158749U CN 206158749 U CN206158749 U CN 206158749U CN 201621033647 U CN201621033647 U CN 201621033647U CN 206158749 U CN206158749 U CN 206158749U
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- drilling
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- rock drill
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Abstract
The utility model relates to a secretly dig platform truck drilling depth control system and secretly dig platform truck drilling equipment, wherein, control system includes: including control unit (1), length detection part (6) and ratio adjusting valve group (2), establish on hydraulic cylinder (4) of secretly digging the platform truck length detection part (6) for detect the displacement volume of hydraulic cylinder (4), control unit (1) is used for judging the resistance that rock drill (5) received according to hydraulic cylinder's (4) displacement volume when driling to the regulation is applyed in the control current of ratio adjusting valve group (2), with adjustment hydraulic cylinder's (4) the pressure and/or the penetration rate of rock drill (5). This kind of control system can be in drilling process carries out automatic control to whole drilling equipment's power to hinder the force variation in mating drilling process, can make penetration rate more even, avoid sticking of tool phenomenon as far as possible, like this under the prerequisite of guaranteeing drilling efficiency, improved the life of drill bit and drilling rod.
Description
Technical field
The utility model is related to tunneling chassis technical field, more particularly to a kind of tunneling chassis drilling depth control system and
Tunneling chassis drilling equipment.
Background technology
The underground space special equipment that tunneling chassis is specific to Metro Tunnel boring construction engineering method and develops, can
It is adapted to various stratum operations such as weak soil, sandy gravel, possesses shoveling, skim, conveying, fluting, beat anchor pole, auxiliary shoring, auxiliary
The several functions such as wet shot.Boring construction is flexible and changeable due to its low cost, version, to surface structures, road and buried pipe
Line affects little, removes the advantages of taking up an area less, disturb residents few, pollution urban environment is few, is widely used, and sends out in subway work field
Wave particularly important effect.
Traditional drilling depth control technology, is that a kind of being stretched by rock drill and hydraulic jack matches to realize drilling
A kind of hydraulic control system.It artificially realizes what rock drilling acc power and oil cylinder stretched mainly according to drilling load pressure size
One kind matching.In existing tunneling Control System of Trolley, due to the difference of actual condition, in drilling it is possible that rock drilling
Machine and the unmatched phenomenon of telescopic oil cylinder, so as to cause the phenomenon such as fast or slow, drill bit bit freezing during drilling, and with operating efficiency
The shortcomings of low, maintenance difficult and big construction intensity.
Although also having introduced industrial control unit (ICU) in the existing control technology of the chassis of tunneling at present realizes that drilling depth is automatically controlled,
But it simply realizes autostop when drilling depth reaches setting value and controls, and its control process is not carried out hydraulic cylinder and chisel
The power match of rock machine.According to setting drilling depth, the flexible completing drilling of rock drill and hydraulic cylinder is controlled by handle, its
The linear transducer that drilling depth can only pass through on hydraulic cylinder reads, and when drilling depth reaches setting value, rock drill is shut down, moved back
Return.This control system, when the construction operating mode of complexity is run into, it is difficult to realize preferable control effect.
Prior art is the data that linear transducer transmission on oil cylinder is read according to controller realizing rock drill
Switch, although can so realize that drilling depth is automatically controlled, it cannot realize hydraulic jack and rock drill in boring procedure
Power match, the phenomenons such as the fast or slow, bit freezing of drilling progress can be caused.Therefore existing scheme can go out during keyhole
The phenomenons such as anchor pole overwork, drill bit bit freezing are now beaten, the life-span of anchor pole is beaten in impact.
Utility model content
The purpose of this utility model is to propose a kind of tunneling chassis drilling depth control system and tunneling chassis drilling equipment,
Can in operation process automatically flexible keyhole operating mode.
For achieving the above object, the utility model first aspect provides a kind of tunneling chassis drilling depth control system,
Including control unit, length detection part and proportion adjustment valve group, the length detection part and the ratio adjusting valve component
It is not connected with the control unit,
The length detection part is located on the hydraulic jack of tunneling chassis, for detecting the displacement of the hydraulic jack
Amount；
The control unit be used for according to the displacement of the hydraulic jack judge rock drill drilling when be subject to hinder
Power, so as to adjust the control electric current for putting on the proportion adjustment valve group, to adjust the pressure of the hydraulic jack and/or described
The penetration rate of rock drill.
Further, the control unit is additionally operable to detect the rock drill in the length detection part and reaches default
During drilling depth, control the rock drill and stop drilling.
Further, the proportion adjustment valve group includes the first proportion magnetic valve and the second proportion magnetic valve, described first
Proportion magnetic valve is used to control the pressure of the hydraulic jack by the control unit, and second proportion magnetic valve is used to lead to
Cross the penetration rate that the control unit controls the rock drill.
Further, the control unit includes analog input interface and two PWM output interfaces, and the analog quantity is defeated
Incoming interface is connected with the length detection part, two PWM output interfaces respectively with first proportion magnetic valve and institute
State the connection of the second proportion magnetic valve.
For achieving the above object, the utility model second aspect provides a kind of tunneling chassis drilling equipment, including execution
Tunneling chassis drilling depth control system described in part and above-described embodiment.
Further, the execution unit includes hydraulic jack, rock drill and coasting mechanism, and the hydraulic jack is used to drive
The dynamic coasting mechanism motion, the rock drill is located on the coasting mechanism.
Further, also including support arm, the execution unit is located at one end of the support arm, the control unit and
The proportion adjustment valve group is located at the other end of the support arm.
Based on above-mentioned technical proposal, tunneling chassis drilling depth control system of the present utility model can be in drilling equipment
During work, the resistance that rock drill is subject in drilling is judged according to the displacement of hydraulic jack, regulation puts on proportion adjustment
The control electric current of valve group, to adjust the pressure of hydraulic jack and/or the penetration rate of rock drill.This kind of control system can bored
The power of whole drilling equipment is automatically controlled during hole, with the change of resistance during match-drilled, drilling can be made
Speed is more uniform, and the phenomenon of drill bit bit freezing occurs in reduction, so on the premise of drilling efficiency is ensured, improves drill bit and brill
The service life of bar, it is to avoid drilling equipment breaks down in the course of the work.
Description of the drawings
Accompanying drawing described herein is used for providing further understanding to of the present utility model, constitutes the part of the application,
Schematic description and description of the present utility model is used to explain the utility model, does not constitute to of the present utility model improper
Limit.In the accompanying drawings：
Fig. 1 is the structural representation of one embodiment of the utility model tunneling chassis drilling equipment；
Fig. 2 is the principle schematic of one embodiment of the utility model tunneling chassis drilling depth control system.
Specific embodiment
The utility model described further below.In the following paragraphs, the different aspect of embodiment is defined in more detail.
The each side for so limiting can be combined with any other one side or many aspects, not can be combined unless explicitly stated otherwise.Especially
It is, it is considered to be preferred or favourable any feature one or more can be considered as preferred or favourable spy with other
Levy combination.
The term descriptions merely for convenience such as " first ", " second " occurred in the utility model, to distinguish with identical
The different building blocks of title, are not offered as priority or primary-slave relation.
First, the utility model provides a kind of tunneling chassis drilling depth control system, as shown in figure 1, including control
Part 1, length detection part 6 and proportion adjustment valve group 2.Length detection part 6 is located on the hydraulic jack 4 of tunneling chassis, is used
In the displacement of detection hydraulic jack 4, for example, length detection part 6 is arranged on the piston rod of hydraulic jack 4, to detect work
The absolute displacement of stopper rod motion.Control unit 1 is used to judge that rock drill 5 is received in drilling according to the displacement of hydraulic jack 4
The resistance for arriving, so as to adjust the control electric current for putting on proportion adjustment valve group 2, to adjust pressure and/or the rock drilling of hydraulic jack 4
The penetration rate of machine 5.
Wherein, the extension and contraction control rock drill 5 of hydraulic jack 4 is pushed ahead or retracted backward, adjusts the pressure of hydraulic jack 4
The size of the drilling dynamics of rock drill 5 can be changed, adjusting the penetration rate of rock drill 5 can change the drilling power of rock drill 5, and this two
The regulation of individual parameter can change the drilling power of whole drilling equipment, with external drag real-time matching.
There are three kinds of regulation situations in the embodiment：Only adjust the pressure of hydraulic jack 4, the only penetration rate of rock drill 5, same
When adjust hydraulic jack 4 pressure and rock drill 5 penetration rate.In these three regulation situations, hydraulic pressure is preferably first adjusted
The pressure of oil cylinder 4, because under the low speed drilling is easier to ensure the security that drill bit is used, if only by increasing hydraulic jack
4 pressure can not still reduce the resistance that drills, and at this moment further increase the penetration rate of rock drill 5, with first increase rock drill 5
Penetration rate, the control mode of the pressure of rear increase hydraulic jack 4 are compared, it is not easy to bit freezing occur, because more holding under the low speed
Easily apply boring pressure, after rotating speed is improved, pressure may not catch up with, cause occur shutdown phenomenon in boring procedure.
In the annexation of all parts, as shown in Fig. 2 control unit 1 is connected with length detection part 6, ratio is adjusted
Section valve group 2 is connected with control unit 1, and this annexation had both been presented as that hardware connected, also with transmission data or control signal
Etc. function.For example, the selectable lengths sensor of length detection part 6, control unit 1 may be selected controller, or PLC, integrated
The hardware unit of the compositions such as circuit, associated components.
Because tunneling chassis carries out operation in subterranean tunnel, the adamantine situation of geological stratification, Er Qieshou are frequently encountered
The restriction in light and space in tunnel, judges front operating mode simultaneously by way of real-time adjustment drilling parameter, it is impossible to accurate artificial
Ground ensures that the use of drilling equipment matches with actual demand.
For the tunneling chassis operative scenario of itself, the tunneling chassis drilling depth control system of the utility model embodiment
System, can judge the resistance that rock drill is subject in drilling when rock drill works according to the displacement of hydraulic jack, adjust
The control electric current of proportion adjustment valve group is put on, to adjust the pressure of hydraulic jack and/or the penetration rate of rock drill.This kind of control
System processed can be automatically controlled in boring procedure to the power of whole drilling equipment, with resistance during match-drilled
Change, can make penetration rate more uniform, and the phenomenon of the too fast slow or bit freezing excessively of penetration rate is avoided as far as possible, so ensure to bore
On the premise of hole efficiency and accuracy, the service life for beating anchor pole is improve, it is to avoid drilling equipment occurs in the course of the work event
Barrier.Meanwhile, boring procedure is carried out to automatically control the burden that can also mitigate operator.
In actual control process, the resistance that rock drill 5 is subject in drilling can determine as follows：First according to liquid
The variable quantity of the extension elongation of displacement calculation hydraulic jack 4 of compressing cylinder 4, further according to the variable quantity of the extension elongation of hydraulic jack 4
The resistance that rock drill 5 is subject in drilling is gone out by pre-programmed curve correspondence.The variable quantity of the extension elongation of hydraulic jack 4 refers to hydraulic pressure
Variable quantity of the extension elongation of oil cylinder 4 within the unit interval, if the variable quantity of the extension elongation of hydraulic jack 4 is in reduction trend,
The resistance increase that rock drill 5 is subject in drilling is then illustrated, otherwise is then reduced.
Wherein, pre-programmed curve is obtained according to historical data or prior information.For example, hydraulic jack 4 is passed through in certain model
The flow gradually increased in enclosing, the scope of the extension elongation variable quantity of hydraulic jack 4 is measured in each flow point, then by test
The curve (including peak and minimum) with regard to flow and extension elongation variable quantity is obtained, as pre-programmed curve control is stored in
In part 1.So during actual borehole, if being passed through corresponding flow, the variable quantity of the extension elongation of hydraulic jack 4 is bent
Minimum in line, then can pass through to table look-up the relation that draw rock drill 5 in drilling between the resistance that is subject to and default resistance.
In order to improve drilling safe, in another embodiment, control unit 1 is additionally operable to be examined in length detection part 6
When measuring rock drill 5 and reaching default drilling depth, control rock drill 5 stops drilling, or further, also can control drill bit and move back
Return.Wherein, default drilling depth is set according to actual job demand.The embodiment can make drilling depth more accurately
Match with actual demand, can also avoid hydraulic jack 4 and the extra work of rock drill 5.
In a preferred embodiment, as shown in Fig. 2 proportion adjustment valve group 2 includes the first proportion magnetic valve 21 and the
Two proportion magnetic valves 22, the first proportion magnetic valve 21 is used to control the pressure of hydraulic jack 4, the second ratio by control unit 1
Magnetic valve 22 is used to control the penetration rate of rock drill 5 by control unit 1.The embodiment can make hydraulic jack 4 and rock drilling
The control process of machine 5 is relatively independent, and the rotating speed for facilitating implementation the pressure only to hydraulic jack 4 or rock drill 5 is individually controlled,
And, it is not easy when wherein a proportion magnetic valve breaks down on another generation impact, so as to improve whole control system
The reliability of system.
Specifically, as shown in Fig. 2 control unit 1 includes analog input interface A1 and two PWM output interfaces, respectively
For PWM1 and PWM2 output interfaces.Wherein, analog input interface A1 is connected with length detection part 6, for receiving length inspection
Survey the displacement of the hydraulic jack of the detection of part 6.PWM1 output interfaces are connected with the first proportion magnetic valve 21, for making control unit
Part 1 to the first proportion magnetic valve 21 exports pwm control signal, to change the control electric current for putting on the first proportion magnetic valve 21,
So as to change the pressure of hydraulic jack 4.PWM2 output interfaces are connected with the second proportion magnetic valve 22, for make control unit 1 to
Second proportion magnetic valve 22 exports pwm control signal, to change the control electric current for putting on the second proportion magnetic valve 22, so as to change
Become the rotating speed of rock drill 5.In addition, control unit 1 may also include power interface, for example, connect 24V dc sources.The embodiment is led to
Cross PWM and realize that current control can improve system's transient response speed, increase the stability of system.
Secondly, the utility model additionally provides a kind of tunneling chassis drilling equipment, in one embodiment, as shown in figure 1,
Including the tunneling chassis drilling depth control system described in hydraulic jack 4, rock drill 5, coasting mechanism 3 and above-described embodiment.
Specifically, the upper end level of the support arm 7 of drilling equipment is provided with coasting mechanism 3 and hydraulic jack 4, hydraulic jack 4
The horizontal movement of coasting mechanism 3 can be driven, rock drill 5 is located at the top of coasting mechanism 3, can realize under the drive of coasting mechanism 3 to
Advance to return backward so that the drill bit installed in the front end of rock drill 5 is drilled or is return.In order to real-time detection liquid
The displacement of compressing cylinder 4, arranges length detection part 6 on hydraulic jack 4, can also be judged according to the displacement of hydraulic jack 4
Go out the resistance that rock drill 5 is subject in drilling.
In addition, control unit 1 and solenoid valve block 2 are installed in the lower end of support arm 7.Embodiment the holding drilling equipment
Row part and control system are respectively provided at the two ends of support arm 7, because rock drill 5 is drilling to front rock or wall
When, working condition is more severe, seriously polluted, and vibration is violent, and this setup can avoid execution unit operationally as far as possible
Control system is impacted, this kind of part higher to control accuracy requirement of proportion adjustment valve group 2 can be especially protected, so as to carry
The reliability and service life of high control system.
In order that those skilled in the art more clearly understand the worked of the utility model tunneling chassis drilling equipment
Journey, below by by taking the concrete structure shown in Fig. 1 and Fig. 2 as an example illustrating the method for work of this kind of drilling equipment.
First, drilling parameter is initialized, in a specific embodiment, control hydraulic jack 4 is according to default
Pressure drilling, control unit 1 can be made to be applied to the first pre-set current value of the first proportion magnetic valve 21 maximum less than first
The 80% of electric current, maximal work ability of first maximum current corresponding to hydraulic jack 4.Control rock drill 5 is according to default
Speed drills, and control unit 1 can be made to be applied to the second pre-set current value of the second proportion magnetic valve 22 less than the second maximum electricity
The 80% of stream, maximal work ability of second maximum current corresponding to rock drill 5.So can to a certain extent prevent drill bit
It is damaged.
After bore operation starts, control hydraulic jack 4 according to default pressure drill and/or control rock drill 5 according to
Default speed drilling.Then in boring procedure in real-time detection tunneling chassis hydraulic jack 4 displacement, and according to hydraulic pressure
The displacement of oil cylinder 4 judges the resistance that rock drill 5 is subject in drilling, then judges the resistance that rock drill 5 is subject in drilling
Whether beyond default Resistance Value, if it is, the control electric current of the first proportion magnetic valve 21 is put on according to the increase of default step-length,
Otherwise continue by default drilling parameter work.
After the control electric current of the first proportion magnetic valve 21 is put on according to the increase of default step-length, judge that rock drill 5 is being bored
Whether the resistance being subject to during hole is returned within default Resistance Value, if it is reduces the output of PWM1, until the first ratio electromagnetism
The control electric current of valve 21 is decreased to the first pre-set current value, otherwise continues to put on the first ratio electromagnetism according to the increase of default step-length
The control electric current of valve 21.
After judging to drill resistance more than default Resistance Value, according to step-length the control of the first proportion magnetic valve 21 is gradually increased
Electric current processed, can make the increase of the pressure of hydraulic jack 4 more steady, it is not easy to damage drill bit.And increasing control electricity each time
After stream, also further exchanging nodule fruit carries out checking judgement, to be back to default drilling parameter in time when resistance is less,
There is too great fluctuation process so as to prevent penetration rate, and save the power of whole drilling equipment.
In order to prevent putting on after the control electric current of the first proportion magnetic valve 21 according to the increase of default step-length, control electric current
Within permissible range.More preferably, if it is judged that the resistance that rock drill 5 is subject in drilling exceeds default Resistance Value, then
Judge whether the current control electric current of the first proportion magnetic valve 21 exceedes default first maximum controlling current value, if not less than
Then the control electric current of the first proportion magnetic valve 21 is put on according to the increase of default step-length, if it exceeds then needing further adjustment chisel
The rotating speed of rock machine 5, i.e., put on the control electric current of the second proportion magnetic valve 22 according to the increase of default step-length.
In order to prevent bit force from excessively occurring damaging, the first maximum controlling current value is preferably no more than the first maximum electricity
The 80% of stream, maximal work ability of first maximum current corresponding to hydraulic jack 4.
The advantage of the embodiment is can to increase drilling equipment by two ways superposition when the resistance that drills is larger
Power, be adapted to the higher drilling object of hardness.And this pressure for first increasing hydraulic jack 4, rear increase rock drill 5
Penetration rate control mode, increase under the low speed pressure and easily realize, bit freezing phenomenon is reduced, so as to keep away as far as possible
Exempt from occur shutdown phenomenon in boring procedure.
After the control electric current of the second proportion magnetic valve 22 is put on according to the increase of default step-length, judge that rock drill 5 exists
Whether the resistance being subject to during drilling is returned within default Resistance Value, if it is first reduce PWM2 output, until rock drill 5 according to
Default speed drilling, then reduce PWM1 outputs, until hydraulic jack 4 drills according to default pressure, otherwise continue according to pre-
If step-length increase puts on the control electric current of the second proportion magnetic valve 22.This control mode can return to default in drilling resistance
After in value, drill bit release under the low speed is made, in case occurring in the phenomenon that rotating speed is uprushed when pressure is reduced suddenly, prevent drill bit to be subject to
Damage.
In order to prevent putting on after the control electric current of the second proportion magnetic valve 22 according to the increase of default step-length, control electric current
Within permissible range.Before every time increase puts on the control electric current of the second proportion magnetic valve 22, second is also can determine whether
Whether the current control electric current of proportion magnetic valve 22 exceedes default second maximum controlling current value, if it is controls rock drill
5 stop drilling, or drill bit can further return, and otherwise put on the second proportion magnetic valve according to the increase of default step-length
22 control electric current.
Wherein, default second maximum controlling current value can correspond to the limit to be reached of the drill bit on rock drill 5
Rotating speed.
The utility model is described in detail above, specific embodiment used herein is to of the present utility model
Principle and embodiment are set forth, the explanation of above example be only intended to help understand method of the present utility model and its
Core concept.It should be pointed out that for those skilled in the art, before without departing from the utility model principle
Put, some improvement and modification can also be carried out to the utility model, these are improved and modification also falls into the utility model right
In the protection domain of requirement.
Claims (7)
1. a kind of tunneling chassis drilling depth control system, it is characterised in that including control unit (1), length detection part (6)
With proportion adjustment valve group (2), the length detection part (6) and the proportion adjustment valve group (2) respectively with the control unit
(1) connect,
The length detection part (6) is located on the hydraulic jack of tunneling chassis (4), for detecting the hydraulic jack (4)
Displacement；
The control unit (1) for according to the displacement of the hydraulic jack (4) judge rock drill (5) drilling when be subject to
Resistance, so as to adjust the control electric current for putting on the proportion adjustment valve group (2), to adjust the pressure of the hydraulic jack (4)
The penetration rate of power and/or the rock drill (5).
2. tunneling chassis drilling depth control system according to claim 1, it is characterised in that the control unit (1)
It is additionally operable to, when the length detection part (6) detects the rock drill (5) and reaches default drilling depth, control the rock drilling
Machine (5) stops drilling.
3. tunneling chassis drilling depth control system according to claim 1, it is characterised in that the proportion adjustment valve group
(2) including the first proportion magnetic valve (21) and the second proportion magnetic valve (22), first proportion magnetic valve (21) is for passing through
The control unit (1) controls the pressure of the hydraulic jack (4), and second proportion magnetic valve (22) is for by the control
Part (1) processed controls the penetration rate of the rock drill (5).
4. tunneling chassis drilling depth control system according to claim 3, it is characterised in that the control unit (1)
Including analog input interface and two PWM output interfaces, the analog input interface is with the length detection part (6) even
Connect, two PWM output interfaces are respectively with first proportion magnetic valve (21) and second proportion magnetic valve (22) even
Connect.
5. a kind of tunneling chassis drilling equipment, it is characterised in that arbitrary described dark including execution unit and Claims 1 to 4
Digging stillage truck drilling depth control system.
6. tunneling chassis drilling equipment according to claim 5, it is characterised in that the execution unit includes hydraulic jack
(4), rock drill (5) and coasting mechanism (3), the hydraulic jack (4) for drive the coasting mechanism (3) move, the chisel
Rock machine (5) is located on the coasting mechanism (3).
7. tunneling chassis drilling equipment according to claim 5, it is characterised in that also including support arm (7), the execution
Part is located at one end of the support arm (7), and the control unit (1) and the proportion adjustment valve group (2) are located at the support
The other end of arm (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621033647.5U CN206158749U (en) | 2016-08-31 | 2016-08-31 | Secretly dig platform truck drilling depth control system and secretly dig platform truck drilling equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621033647.5U CN206158749U (en) | 2016-08-31 | 2016-08-31 | Secretly dig platform truck drilling depth control system and secretly dig platform truck drilling equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206158749U true CN206158749U (en) | 2017-05-10 |
Family
ID=58651368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621033647.5U Withdrawn - After Issue CN206158749U (en) | 2016-08-31 | 2016-08-31 | Secretly dig platform truck drilling depth control system and secretly dig platform truck drilling equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206158749U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106223973B (en) * | 2016-08-31 | 2019-01-25 | 徐工集团工程机械有限公司 | Tunneling trolley drilling depth control method, system and tunneling trolley drilling equipment |
-
2016
- 2016-08-31 CN CN201621033647.5U patent/CN206158749U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106223973B (en) * | 2016-08-31 | 2019-01-25 | 徐工集团工程机械有限公司 | Tunneling trolley drilling depth control method, system and tunneling trolley drilling equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170510 Effective date of abandoning: 20190125 |