CN205778843U - The detection device of getting working face front stress distribution situation - Google Patents
The detection device of getting working face front stress distribution situation Download PDFInfo
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- CN205778843U CN205778843U CN201620673991.4U CN201620673991U CN205778843U CN 205778843 U CN205778843 U CN 205778843U CN 201620673991 U CN201620673991 U CN 201620673991U CN 205778843 U CN205778843 U CN 205778843U
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Abstract
This utility model relates to stress of coal seam detection device, the detection device of a kind of getting working face front stress distribution situation simultaneously measuring diverse location stress in the coal bed drilling in getting working face front.Including double-deck cylinder steel pipe, outer rubber sleeve, it is provided with multiple stressometer being evenly arranged between outer rubber sleeve and double-deck cylinder steel pipe, cement mortar is full of the space between outer rubber sleeve and hole wall, hydraulic pressure is used to hold up the upper end open cylinder type hollow cylinder of stressometer, all inner sides with outer rubber sleeve contact, it is provided with the spring of mutual pushing tow in the cavity that the lower ending opening cylinder type hollow cylinder of stressometer and upper end open cylinder type hollow cylinder are formed, in upper end open cylinder type hollow cylinder, is provided with the one-way check device adapted with spring.The effect efficiency evaluation of dynamic disaster risk assessment that this utility model is getting working face front and prophylactico-therapeutic measures thereof provides a kind of method, solve getting working face front stress in coal bed cannot directly, the technical barrier that simultaneously measures of multiple spot.
Description
Technical field
This utility model relates to a kind of stress of coal seam detection device, a kind of coal seam drilling in getting working face front
Measure the detection device of the getting working face front stress distribution situation of diverse location stress in hole simultaneously.
Background technology
It is known that at underground coal mine, according to stress intensity, getting working face front substantially can be divided into 3 regions and (unload
Nip, area of stress concentration and primitive stress district), the stress in distressed zone is less than primitive stress, and the stress in area of stress concentration is wanted
Higher than primitive stress, area of stress concentration dynamic disaster often start district, distressed zone have hinder dynamic disaster development merit
Can, therefore, for dynamic disaster preventing and controlling, both can reduce the stress concentration degree of area of stress concentration (as protective layer is opened
Adopt), it is possible to expand the width (such as deep hole standing shot) of distressed zone, no matter be to take which kind of prophylactico-therapeutic measures, be required for grasp and adopt
The stress distribution situation in pick work surface front, only in this way, just can make dynamic disaster preventing and controlling the most economical, safety again.
At present, the stress mornitoring method about mining work front is as follows；The most traditional method is to drill, and measures
Coal powder quantity of bore, coal powder quantity of bore is the biggest, and stress is the biggest, and this is a kind of indirect, qualitative determination method, and drilling cuttings is discharged to hole from bit location
Mouth exists the most delayed, and the drilling cuttings that aperture receives is also not exclusively from bit location, and therefore, the reliability of measurement result is not
Height, borehole stressmeter can only pinpoint mensuration stress, it is impossible to accomplishes that synchronization measures the stress of boring diverse location；Patent Shen
Number disclose a kind of getting working face crustal stress distribution characteristics detection method for the utility model patent of CN201410028572.0,
The method measures, calculates the vibration velocity of wave of getting working face front diverse location, and according to velocity of wave and the relation of crustal stress, determines
Crustal stress distribution characteristics, this is also that one determines method indirectly, and measures, calculates and analyze complex.
Therefore, in order to allow coal mining enterprise accurately grasp the stress distribution situation in getting working face front, power is carried out smoothly
Diaster prevention and control works, explore a kind of technique that simultaneously can the most directly measure getting working face front difference drilling depth stress with
Device just seems the most urgent.
Utility model content
This utility model aims to solve the problem that the problems referred to above, thus provides the inspection of a kind of getting working face front stress distribution situation
Survey device.
This utility model solves described problem, the technical scheme is that
The detection device of a kind of getting working face front stress distribution situation, including double-deck cylinder steel pipe, double-deck cylindrical steel
Pipe front end is connected by helicitic texture preposition termination, and double-deck cylinder steel pipe rear end is provided with ring flange, and ring flange is by bolt even
Be connected to rearmounted termination, outside double-deck cylinder steel pipe, be set with outer rubber sleeve, outer rubber sleeve two ends respectively with preposition termination and rear side
Head connects, and ring flange is respectively equipped with what the annular housing of the return pipe that is placed in outside outer rubber sleeve and double-deck cylinder steel pipe connected
Joint steel pipe, the inner tube rear end of double-deck cylinder steel pipe connects slip casting high-pressure rubber pipe, and joint steel pipe and slip casting high-pressure rubber pipe are respectively
Connect topping-up pump and grouting pump, between outer rubber sleeve and double-deck cylinder steel pipe, be provided with multiple stressometer being evenly arranged；Stressometer
Including lower end hold-down support, upper end open cylinder type hollow cylinder, lower ending opening cylinder type hollow cylinder, lower end hold-down support is placed in double
Connecting on layer cylinder steel pipe and with the annular housing of double-deck cylinder steel pipe, the opening of lower end hold-down support passes through sliding ring
Being connected with upper end open cylinder type hollow cylinder, the opening of upper end open cylinder type hollow cylinder is sleeved on lower ending opening cylindrical empty
On heart cylinder, in the cavity that lower ending opening cylinder type hollow cylinder and upper end open cylinder type hollow cylinder are formed, it is provided with the bullet of mutual pushing tow
Spring, is provided with the one-way check device adapted with spring in upper end open cylinder type hollow cylinder.
Using this utility model of technique scheme, compared with prior art, its prominent feature is:
There is provided the detection device of a kind of getting working face front stress distribution situation for enterprise, this device is positioned over coal seam drilling
Kong Zhong, arranges multiple stressometers along drilling axis direction, monitors the stress from boring rib around simultaneously, uses spring
Decrement measures stress intensity, use one-way check device guarantee spring can only one-way movement, when liquid release, stressometer
Upper end open cylinder type hollow cylinder drives entire lowering, separates with outer rubber sleeve, and now reversion can extract determinator, and obtains
Take stress reading, solve getting working face front stress in coal bed cannot directly, the technical barrier that simultaneously measures of multiple spot, application this
Device can grasp the stress distribution situation in getting working face front, and is the dynamic disaster risk assessment in getting working face front
And the effect efficiency evaluation of prophylactico-therapeutic measures provides a kind of method.
As preferably, this utility model further technical scheme is:
Joint steel pipe is by the conical surface and sealing ring built-up joint and double-deck cylinder fastener for connection.
Joint steel pipe is connected with topping-up pump by fluid injection high-pressure rubber pipe.
Outer rubber sleeve front end is contained on preposition termination by hoop sleeve.
Outer rubber sleeve rear end is bonding with rearmounted termination by seccotine.
One-way check device is evenly arranged multiple along the inwall of upper end open cylinder type hollow cylinder, each one-way check device check
Sheet bottom is fixed on upper end open cylinder type hollow cylinder by rivet.
Accompanying drawing explanation
Fig. 1 is the structural representation of this utility model embodiment；
Fig. 2 is the partial enlarged drawing of A in Fig. 1；
Fig. 3 is the partial enlarged drawing of B in Fig. 1；
In figure: coal seam 1；Preposition termination 2；Outer rubber sleeve 3；Stressometer 4；Spring 4-1；One-way check device 4-2；Lower ending opening
Cylinder type hollow cylinder 4-3；Upper end open cylinder type hollow cylinder 4-4；Sliding ring 4-5；Lower end hold-down support 4-6；Rear side
5；Return pipe 6；Bolt 7；Ring flange 8；Joint steel pipe 9；Fluid injection high-pressure rubber pipe 10；Topping-up pump 11；Slip casting high-pressure rubber pipe 12；Note
Stock pump 13；Hole wall 14；Double-deck cylinder steel pipe 15；Ring flange 16；Annular housing 17；Inner tube 18；The conical surface and sealing ring built-up joint
19。
Detailed description of the invention:
Below in conjunction with embodiment, the utility model is described in further detail, and purpose is only that and is more fully understood that this utility model
Content, therefore, the cited case is not limiting as protection domain of the present utility model.
Seeing Fig. 1, Fig. 2, Fig. 3, inner tube 18 front end of double-deck cylinder steel pipe 15 is connected by helicitic texture preposition termination
2, inner tube 18 rear end of double-deck cylinder steel pipe 15 is set with ring flange 8, and ring flange 8 is connected by bolt 7 rearmounted termination 5, double
Being set with outer rubber sleeve 3 outside layer cylinder steel pipe 15, outer rubber sleeve 3 front end is contained on preposition termination 2 by hoop sleeve, outer rubber sleeve
3 rear ends are bonding with rearmounted termination 5 by seccotine, and joint steel pipe 9 one end is connect through ring flange 8 by the conical surface and sealing ring combination
19 connect with the annular housing 17 of double-deck cylinder steel pipe 15, and joint steel pipe 9 other end passes through fluid injection high-pressure rubber pipe 10 and fluid injection
Pump 11 connects, and inner tube 18 rear end of double-deck cylinder steel pipe 15 is connected with grouting pump 13 by slip casting high-pressure rubber pipe 12, stressometer 4 edge
Double-deck cylinder steel pipe 15 and be evenly arranged 26, each stressometer 4 is close by a lower end hold-down support 4-6, a slip
Seal 4-5, one-way check device 4-2, lower ending opening cylinder type hollow cylinder 4-3, a upper end open cylinder type hollow
Cylinder 4-4 and spring 4-1 composition, lower end hold-down support 4-6 be welded on double-deck cylinder steel pipe 15 and with double-deck cylinder steel pipe
The annular housing 17 of 15 connects, and the opening of lower end hold-down support 4-6 is by sliding ring 4-5 and upper end open cylindrical empty
Heart cylinder 4-4 connect, upper end open cylinder type hollow cylinder 4-4 under stress effect, retractable, upper end open cylinder type hollow
The opening of cylinder 4-4 is sleeved on lower ending opening cylinder type hollow cylinder 4-3, and lower ending opening cylinder type hollow cylinder 4-3 opens with upper end
Be provided with in the cavity that mouthful cylinder type hollow cylinder 4-4 is formed spring 4-1, the spring 4-1 two ends of mutual pushing tow respectively with lower ending opening
Cylinder type hollow cylinder 4-3 and upper end open cylinder type hollow cylinder 4-4 welding, upper end open cylinder type hollow cylinder 4-4 inwall sets
The one-way check device 4-2 that a circle and spring 4-1 adapt, each one-way check device 4-2 check sheet bottom is had to be fixed by rivet
On upper end open cylinder type hollow cylinder 4-4, lower to rotating within the specific limits, spring 4-1 can retrain its rotational steps, and
Make it have reset trend.
The making material of preposition termination 2 is rustless steel, and cross section is rounded, internal diameter 15mm, external diameter 60mm, long 20mm；Double-deck
The agent structure internal diameter 30mm of cylinder steel pipe 15, external diameter 40mm, long 20m, its front inner diameter 12mm, external diameter 14mm, long 20mm；
The making material of outer rubber sleeve 3 is silica gel, diameter 90mm, long 20m；The structure of each stressometer 4 and making material are completely the same,
Lower end hold-down support 4-6 is a hollow cylindrical tube, and material is rustless steel, internal diameter 20mm, external diameter 24mm, high 20mm；Slide close
Seal 4-5 is O RunddichtringO, internal diameter 16mm, external diameter 22mm, thick 5mm；One-way check device 4-2 is made up of plastic sheet and little spring,
The making material of plastics is high-strength engineering plastic, and cross section is trapezoidal, and upper and lower width is 10mm and 15mm respectively, thick 5mm；Little spring
For common spring, long 8mm；The making material of upper end open cylinder type hollow cylinder 4-4 is rustless steel, internal diameter 16mm, external diameter 18mm,
High 20mm；The making material of lower ending opening cylinder type hollow cylinder 4-3 is rustless steel, internal diameter 10mm, external diameter 12mm, high 15mm；Bullet
The long 25mm of spring 4-1, thick 10mm；Bolt 30 is conventional hexagonal bolt, long 50mm, thick 10mm；The making material of ring flange 16 is not
Rust steel, internal diameter 20mm, external diameter 92mm, thick 30mm；The making material of rearmounted termination 5 is rustless steel, internal diameter 70mm, external diameter 90mm,
Thick 30mm；The frustoconical bevel angle of the conical surface and sealing ring built-up joint 19 is 30o, and sealing ring is O RunddichtringO, external diameter 8mm, internal diameter
6mm；Joint steel pipe 9 is circular, and long 150mm, external diameter 10mm, wall thickness 1mm, making material is rustless steel；Slip casting high-pressure rubber pipe 12
It is rubber with the making material of fluid injection high-pressure rubber pipe 10, long 10-15m, external diameter 10mm, wall thickness 1mm；Return pipe 6 is circular, long
100mm, external diameter 10mm, wall thickness 1mm, making material is rustless steel；Topping-up pump 11 is permanent boat SB-10 type manual pressure test pump；Slip casting
Pump 13 is 3ZBQS1210 moulded coal mining biliquid Pneumatic grouting pump.
Use helicitic texture to be connected between preposition termination 2 with double-deck cylinder steel pipe 15, when measuring end-of-job, unload purgation
Blue dish 16, the double-deck cylinder steel pipe 15 of reversion is that is separable, extracts boring；The inner tube 18 of double-deck cylinder steel pipe 15 is by slip casting high pressure
Sebific duct 12 injects the cement mortar from grouting pump 13, and cement mortar flows between hole wall 14 and whole device through boring front
Gap, and can judge whether to be full of by return pipe 6, by joint steel pipe 9 He in the annular housing 17 of double-deck cylinder steel pipe 15
Fluid injection high-pressure rubber pipe 10 injects the highly pressurised liquid from topping-up pump 11, by the compression of liquid, is opened the upper end of stressometer 4
Mouth cylinder type hollow cylinder 4-4 entirety is lifted；Outer rubber sleeve 3 has certain intensity and elasticity concurrently, both can be effectively isolated periphery
The cement mortar injected, can have good deformability when hole wall 14 compresses again；Ring flange 16 passes through bolt 7 with rearmounted
Termination 5 is connected, and the cement mortar of the interior injection that can effectively prevent from holing is excessive；Boring surrounding medium stress by cement mortar and
Outer rubber sleeve 3 passes to the lower ending opening cylinder type hollow cylinder 4-3 of stressometer 4 upper end, and promotes spring 4-1 to move down,
Under the control of one-way check device 4-2, spring 4-1 often declines a ring, is all again blocked, and only declines, it is impossible to upwards rebound, work as survey
After determining end-of-job, loosening topping-up pump 11, release, the upper end open cylinder type hollow cylinder 4-4 on stressometer 4 drives under entirety
Fall, and realize stressometer 4 and separate with outer rubber sleeve 3, stressometer 4 is evenly arranged along double-deck cylinder steel pipe 15, each stress
The bottom liquid pressure of meter 4 is equal, and the gap between top hole wall 14 and outer rubber sleeve 3 is each filled with cement mortar, therefore, and can be true
Property (include measuring work and initially and terminate two moment) while protecting diverse location stressometer 4 work；Spring 4-1 can on ground
First carry out compression experiment, draw the corresponding relation between different reduction length and stress, when disconnecting topping-up pump 11 and grouting pump 13,
Open ring flange 16, the double-deck cylinder steel pipe 15 of reversion, after extracting boring, by observing the decline displacement of spring 4-1, can differentiate
The size of stress, and draw out the getting working face front distribution curve of stress along drilling axis direction.
The work process of this device is as follows:
In advance stressometer 4 is installed, is welded on double-deck cylinder steel pipe 15, by preposition termination 2, outer rubber sleeve 3 and after
Put termination 5 to connect, fix.
Above-mentioned ready device is nested together, tightens, sends into and measure boring, reach precalculated position.
Bolt 7 mounting flange 16(return pipe 6 and ring flange 16 is utilized to weld together) and rearmounted termination 5, tighten, and
By the conical surface and sealing ring built-up joint 19 connected double-layer cylinder steel pipe 15 and joint steel pipe 9, seal tight.
Fluid injection high-pressure rubber pipe 10 and slip casting high-pressure rubber pipe 12 is utilized to connect topping-up pump 11 and grouting pump 13 respectively.
Start grouting pump 13, by the inner tube 18 of slip casting high-pressure rubber pipe 12 and double-deck cylinder steel pipe 15 to boring front and hole
Wall 14 surrounding injects cement mortar, and is observed by return pipe 6, until serosity till return pipe 6 flows out.
Priming pump 11, by fluid injection high-pressure rubber pipe 10 and joint steel pipe 9 to the annular housing of double-deck cylinder steel pipe 15
Inject inflation fluid in 17, promote the upper end open cylinder type hollow cylinder 4-4 of stressometer 4 to drive entirety to move up, until with outward
Rubber sleeve 3 contacts (concrete suppressed time and final pressure can be determined) by ground experiment.
Observation a period of time, (As time goes on, boring surrounding medium was under stress effect, to hole contract, compressing
Spring 4-1 in stressometer 4 moves down), lay down slip casting high-pressure rubber pipe 12, open the pressure-relief valve of topping-up pump 11, double-deck cylinder
Hydraulic pressure in the annular housing 17 of steel pipe 15 is released from, and the upper end open cylinder type hollow cylinder 4-4 of stressometer 4 drives overall downward
Mobile, and separate with outer rubber sleeve 3.
Unclamp bolt 7, unload lower flange 16(return pipe 6 and weld together with ring flange 16), the double-deck cylinder steel pipe of reversion
15, and extract boring.
Decrement and ground test result (spring 4-1 decrement and the corresponding relation of stress) according to spring 4-1 read
The stress of spring 4-1, and draw out the distribution curve of stress along drilling axis direction, draw its distribution situation.
This utility model uses the decrement of spring 4-1 to measure stress intensity, uses one-way check device 4-2 to guarantee spring
4-1 can only one-way movement, when liquid release, the upper end open cylinder type hollow cylinder 4-4 of stressometer 4 drives entire lowering, with
Outer rubber sleeve 3 separates, and now, reversion can extract determinator, and obtains stress reading, is core skill of the present utility model
Art；Use the space that cement mortar is full of between outer rubber sleeve 3 and hole wall 14, use hydraulic pressure to hold up the upper end open of stressometer 4
Cylinder type hollow cylinder 4-4, all inner side with outer rubber sleeve 3 contact, and arrange many group stressometers 4 along drilling axis, have not
With the function of the stress synchronous detecting of measuring point, and stress mornitoring is actual measurement, is the advantage of this utility model maximum.
This utility model can be the detection device that enterprise provides a kind of getting working face front stress distribution situation, this device
It is positioned in the boring in coal seam 1, arranges multiple stressometers 4 along drilling axis direction, monitor from boring surrounding hole wall simultaneously
The stress of 14, after withdrawing device to be reversed, i.e. can read the surveyed data of stressometer 4, and solving getting working face front coal body should
Power cannot directly, the technical barrier that simultaneously measures of multiple spot, apply this device can grasp the stress distribution shape in getting working face front
Condition, and provide one for the dynamic disaster risk assessment in getting working face front and the effect efficiency evaluation of prophylactico-therapeutic measures thereof
Method.
The foregoing is only the embodiment that this utility model is the most feasible, not thereby limit to power of the present utility model
Profit scope, the equivalence change that all utilization this utility model description and accompanying drawing content thereof are made, it is both contained in of the present utility model
Within interest field.
Claims (6)
1. the detection device of a getting working face front stress distribution situation, it is characterised in that: include double-deck cylinder steel pipe, double
Layer cylinder steel pipe front end is connected by helicitic texture preposition termination, and double-deck cylinder steel pipe rear end is provided with ring flange, and ring flange leads to
Cross bolt to connect and have a rearmounted termination, outside double-deck cylinder steel pipe, be set with outer rubber sleeve, outer rubber sleeve two ends respectively with preposition termination
Connect with rearmounted termination, ring flange is respectively equipped with the return pipe being placed in outside outer rubber sleeve and the annular chamber of double-deck cylinder steel pipe
The joint steel pipe of body connection, the inner tube rear end of double-deck cylinder steel pipe connects slip casting high-pressure rubber pipe, joint steel pipe and slip casting high pressure
Sebific duct connects topping-up pump and grouting pump respectively, is provided with multiple stress being evenly arranged between outer rubber sleeve and double-deck cylinder steel pipe
Meter；Stressometer includes lower end hold-down support, upper end open cylinder type hollow cylinder, lower ending opening cylinder type hollow cylinder, and lower end is fixed
Bearing is placed on double-deck cylinder steel pipe and connects with the annular housing of double-deck cylinder steel pipe, and the opening of lower end hold-down support passes through
Sliding ring is connected with upper end open cylinder type hollow cylinder, and the opening of upper end open cylinder type hollow cylinder is sleeved on lower end and opens
On mouth cylinder type hollow cylinder, in the cavity that lower ending opening cylinder type hollow cylinder and upper end open cylinder type hollow cylinder are formed, it is provided with phase
The spring of pushing tow, is provided with the one-way check device adapted with spring in upper end open cylinder type hollow cylinder mutually.
The detection device of getting working face front the most according to claim 1 stress distribution situation, it is characterised in that: connect
Steel pipe is by the conical surface and sealing ring built-up joint and double-deck cylinder fastener for connection.
The detection device of getting working face front the most according to claim 1 stress distribution situation, it is characterised in that: connect
Steel pipe is connected with topping-up pump by fluid injection high-pressure rubber pipe.
The detection device of getting working face front the most according to claim 1 stress distribution situation, it is characterised in that: outer glue
Leather sheath front end is contained on preposition termination by hoop sleeve.
The detection device of getting working face front the most according to claim 1 stress distribution situation, it is characterised in that: outer glue
Leather sheath rear end is bonding with rearmounted termination by seccotine.
The detection device of getting working face front the most according to claim 1 stress distribution situation, it is characterised in that: unidirectional
Holdback is evenly arranged multiple along the inwall of upper end open cylinder type hollow cylinder, and riveting is passed through in each one-way check device check sheet bottom
Nail is fixed on upper end open cylinder type hollow cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620673991.4U CN205778843U (en) | 2016-06-30 | 2016-06-30 | The detection device of getting working face front stress distribution situation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620673991.4U CN205778843U (en) | 2016-06-30 | 2016-06-30 | The detection device of getting working face front stress distribution situation |
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| Publication Number | Publication Date |
|---|---|
| CN205778843U true CN205778843U (en) | 2016-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620673991.4U Expired - Fee Related CN205778843U (en) | 2016-06-30 | 2016-06-30 | The detection device of getting working face front stress distribution situation |
Country Status (1)
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| CN (1) | CN205778843U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105927219A (en) * | 2016-06-30 | 2016-09-07 | 华北科技学院 | Device for detecting stress distribution condition in front of excavation working face |
| CN106593412A (en) * | 2017-02-20 | 2017-04-26 | 中国矿业大学(北京) | All-angle dynamic monitoring device for stability of gas extraction drilling hole and monitoring method |
| CN111750902A (en) * | 2020-06-24 | 2020-10-09 | 兰州理工大学 | Multi-sensitivity piezoelectric bolt looseness monitoring device and use and identification method thereof |
-
2016
- 2016-06-30 CN CN201620673991.4U patent/CN205778843U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105927219A (en) * | 2016-06-30 | 2016-09-07 | 华北科技学院 | Device for detecting stress distribution condition in front of excavation working face |
| CN105927219B (en) * | 2016-06-30 | 2023-08-25 | 华北科技学院 | Detection device for front stress distribution condition of mining working face |
| CN106593412A (en) * | 2017-02-20 | 2017-04-26 | 中国矿业大学(北京) | All-angle dynamic monitoring device for stability of gas extraction drilling hole and monitoring method |
| CN106593412B (en) * | 2017-02-20 | 2023-12-01 | 中国矿业大学(北京) | Dynamic monitoring device and monitoring method for stability of full-angle gas extraction borehole |
| CN111750902A (en) * | 2020-06-24 | 2020-10-09 | 兰州理工大学 | Multi-sensitivity piezoelectric bolt looseness monitoring device and use and identification method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161207 Termination date: 20210630 |