CN207703207U - A kind of wind-driven generator tower testing apparatus for verticality - Google Patents
A kind of wind-driven generator tower testing apparatus for verticality Download PDFInfo
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- CN207703207U CN207703207U CN201721634940.1U CN201721634940U CN207703207U CN 207703207 U CN207703207 U CN 207703207U CN 201721634940 U CN201721634940 U CN 201721634940U CN 207703207 U CN207703207 U CN 207703207U
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Abstract
The utility model discloses a kind of wind-driven generator tower testing apparatus for verticality, include multiple hydrostatic levels by connecting communicating pipe and multiple hydrostatic level fixation kits, each hydrostatic level fixation kit includes horizontal suspension, arc frame, two shafts and two arc cards；Horizontal suspension is connected with vertical connection sheet, and vertical connection sheet is set on the madial wall of wind-driven generator tower, and the end set of horizontal suspension has horizontal axis set, one end rotation connection at the intermediate position in arc frame outside and the shaft being horizontally set in horizontal axis set；Each shaft is each passed through one end of arc frame, and two shafts are mutually conllinear and perpendicular with shaft, and the outer end of shaft is connected with catch；Two arc cards are separately positioned on the inside at the both ends of arc frame, and the intermediate position on the outside of each arc card is fixedly connected with the inner end of shaft；Each hydrostatic level is clipped in respectively among two arc cards.The structure of the detecting device is simple, easy to use, is not interfered by tower outside environment, high certainty of measurement, efficient.
Description
Technical field
The utility model belongs to technical field of wind power, is filled more particularly, to a kind of wind-driven generator tower measuring for verticality
It sets.
Background technology
The tower height of wind-driven generator is generally 70~90m, similar with the high-rise structures such as chimney, and wind turbine is whole to incline
It is tiltedly the state index for needing emphasis to monitor in fan operation.
The inclined method of traditional measurement wind-driven generator tower mainly has theodolite sciagraphy, total powerstation non-prism method,
Cardinal principle is all to calculate wind turbine inclination with the bias in the horizontal direction of lower planes central point is measured.However, this method
It needs setting station at 1.5~2 times of tower height of tower, for part mountain wind field, fan platform is smaller, it is difficult to which satisfaction is set
Standing, big, operation requires height, measurement method cumbersome by extraneous factor interference for required distance, and total powerstation etc., especially for installation
The larger wind field of capacity, wind turbine quantity is more, and practical measurement efficiency is not high.
Utility model content
In order to solve the above problem, the purpose of this utility model is to provide a kind of wind-driven generator tower measuring for verticality dresses
It sets, can simply, quickly be laid in wind-driven generator tower and wind-driven generator tower verticality is measured, detection dress
It sets simple in structure, easy to use, is not interfered by tower outside environment, it is high certainty of measurement, efficient.
In order to achieve the above object, the utility model is resolved using following technical scheme.
The content of the utility model proposes a kind of wind-driven generator tower testing apparatus for verticality, including multiple static levels
Instrument and multiple hydrostatic level fixation kits are connected by communicating pipe between the multiple hydrostatic level, each static(al)
Spirit level fixation kit includes horizontal suspension, arc frame, two shafts and two arc cards；The horizontal suspension is connected with vertical connection
Piece, the vertical connection sheet are set on the madial wall of the wind-driven generator tower, and the end set of the horizontal suspension has horizontal axis
It covers, shaft is horizontally arranged in the horizontal axis set；The centering angle of the arc frame is more than 180 °, in the outside of the arc frame
Between one end of position and the shaft be rotatablely connected；Each shaft is each passed through one end of the arc frame, described in two
Shaft is mutually conllinear, and perpendicular with the shaft, and one end that the shaft stretches into the inside of the arc frame is inner end, is located at institute
The one end for stating the outside of arc frame is outer end, and the outer end of the shaft is connected with catch；Two arc cards are separately positioned on
The centering angle of the inside at the both ends of the arc frame, the arc card is less than 180 °, the centre in the outside of each arc card
Position is fixedly connected with the inner end of the shaft；Each hydrostatic level is clipped in two of the inside of the arc frame respectively
Among the arc card.
The horizontal axis set of wind-driven generator tower testing apparatus for verticality according to the present utility model, horizontal suspension end is interior laterally
Shaft is set, and one end of shaft is rotatablely connected arc frame, and the centering angle of arc frame is more than 180 °, axis is conveniently arranged on arc frame
Simultaneously the arc card for hydrostatic level to be clamped is arranged in the inside of arc frame by shaft in bar, and the centering angle of arc card is less than
180 ° so that arc card can be with the clamping hydrostatic level of free and stable；Hydrostatic level is clamped in the two of the interior survey of arc frame
Among a arc card, and it can bear a heavy burden in the lower end of hydrostatic level, hydrostatic level can rotate under the effect of gravity with shaft,
Keep hydrostatic level vertical with horizontal plane holding always, reduce the error to wind-force tower measuring for verticality, it is accurate to improve detection
Degree.
The madial wall of the vertical connection sheet and wind-driven generator tower that are connected on horizontal suspension connects, and thus consolidates hydrostatic level
Determine component and hydrostatic level is fixedly connected on the madial wall of tower, multiple hydrostatic levels are separately fixed at a certain height of tower
On the same cross section of degree, and multiple spirit level fixation kits and hydrostatic level cloth are set as axisymmetrical shape, multiple static(al) water
It is connected by communicating pipe between quasi- instrument, forms linker, hydrostatic level is connect with data collecting system respectively, each to record
Height residing for hydrostatic level, hydrostatic level and data collecting system can be connected wirelessly, also, data acquire
Instrument is also associated with data processing module, and data processing module can calculate to obtain by the liquid level that each hydrostatic level monitors
The angle of inclination of wind-driven generator tower and tilt quantity；In addition, can also be in wind driven generator base periphery foundation settlement datum mark
One hydrostatic level of upper laying assists the settling amount of detection wind-driven generator tower with this.
The wind-driven generator tower testing apparatus for verticality of the utility model is simple in structure, easy to operate, in wind-power electricity generation
Laying mode in machine tower is easy, is not limited and is done by the extraneous factors such as platform size residing for tower height and tower
It disturbs；Also, the detection device can also carry out long term monitoring to the verticality of wind-driven generator tower.
Preferably, the shaft is sliding bar, the shaft rod upper sleeve is equipped with spiral compression spring, the helical compression
One end of spring withstands on the inside of the arc frame, and the other end withstands on the outside of the arc card.
Wind-driven generator tower testing apparatus for verticality according to the present utility model is equipped with spiral compression spring on shaft,
One end of spiral compression spring withstands on the inside of arc frame, and the other end withstands on the outside of arc card；Spiral compression spring can make two
Space in a arc card arbitrarily changes, and is suitable for different types of hydrostatic level, and using the elastic reinforcement arc of spring
Degree of fixation of the shape card to hydrostatic level.
Preferably, being provided with screw thread on the side wall of the shaft, the shaft is threadedly attached in the arc
The both ends of frame, the inner end of the shaft are connect with the outside squash bowl of the arc card.
Wind-driven generator tower testing apparatus for verticality according to the present utility model, the mode that shaft is connected through a screw thread are solid
The both ends of arc frame are scheduled on, the inner end of shaft connect with the outside squash bowl of arc card, is achieved in and is stuck in hydrostatic level
Among two arc cards, also, since arc frame is rotatably connected on one end of shaft, thus make hydrostatic level that can remain
With horizontal plane, the accuracy of the liquid level of hydrostatic level is improved, and then improves the detection device to wind-driven generator
The accuracy in detection of the verticality of tower.
Preferably, being connected with magnet base in the vertical connection sheet, the vertical connection sheet is adsorbed on institute by magnet base
It states on the madial wall of wind-driven generator tower.
Wind-driven generator tower testing apparatus for verticality according to the present utility model, vertical connection sheet are adsorbed on by magnet base
On the madial wall of wind-driven generator tower, facilitate the wind-driven generator tower testing apparatus for verticality in wind-driven generator tower
Fixation on wall and dismounting.
Preferably, being provided with connecting hole in the vertical connection sheet, the vertical connection sheet is bolted to connection
On the madial wall of the tower.
Wind-driven generator tower testing apparatus for verticality according to the present utility model, vertical connection sheet are bolted to connection
On the madial wall of the tower, facilitate the wind-driven generator tower testing apparatus for verticality on wind-driven generator tower inner wall
Fixation and dismounting.
Preferably, the multiple hydrostatic level is even number.
Wind-driven generator tower testing apparatus for verticality according to the present utility model, on wind-driven generator tower madial wall
The hydrostatic level of setting is even number, and multiple hydrostatic level cloth are set as axisymmetrical shape so that multiple hydrostatic levels
Multiple angles of wind-driven generator tower can be monitored, can more accurately detect the vertical of wind-driven generator tower
Degree.
Description of the drawings
The utility model is described in further details in the following with reference to the drawings and specific embodiments.
Fig. 1 is a kind of structural representation of embodiment of the wind-driven generator tower testing apparatus for verticality of the utility model
Figure；
Fig. 2 is the structural representation of the hydrostatic level fixation kit of wind-driven generator tower testing apparatus for verticality in Fig. 1
Figure；
Fig. 3 is the structural schematic diagram that hydrostatic level is clamped in the hydrostatic level fixation kit of Fig. 2.
In figs. 1 to 3：1 hydrostatic level；2 hydrostatic level fixation kits；3 communicating pipes；4 wind-driven generator towers；
5 horizontal suspensions；6 vertical connection sheets；7 horizontal axis sets；8 shafts；9 arc frames；10 shafts；11 catch；12 arc cards；13 helical compression bullets
Spring；14 magnet bases.
Specific implementation mode
With reference to figure 1 and Fig. 2, wind-driven generator tower verticality that the embodiment of content according to the present utility model is proposed
Detection device, including multiple hydrostatic levels 1 and multiple hydrostatic level fixation kits 2, between the multiple hydrostatic level 1
It is connected by communicating pipe 3, each hydrostatic level fixation kit 2 includes 9, two horizontal suspension 5, arc frame shafts 10 and two
A arc card 12；The horizontal suspension 5 is connected with vertical connection sheet 6, and the vertical connection sheet 6 is set to the wind-driven generator tower 4
Madial wall on, the end set of the horizontal suspension 5 has horizontal axis to cover 7, and shaft 8 is horizontally arranged in the horizontal axis set 7；The arc
The centering angle of shape frame 9 is more than 180 °, and the intermediate position in the outside of the arc frame 9 is rotatablely connected with one end of the shaft 8；Often
A shaft 10 is each passed through one end of the arc frame 9, and two shafts 10 are mutually conllinear, and hangs down with 8 phase of the shaft
Directly, one end that the shaft 10 stretches into the inside of the arc frame 9 is inner end, and one end positioned at the outside of the arc frame 9 is
The outer end of outer end, the shaft 10 is connected with catch 11；Two arc cards 12 are separately positioned on the both ends of the arc frame 9
Inside, the centering angle of the arc card 12 is less than 180 °, the intermediate position in the outside of each arc card 12 and the axis
The inner end of bar 10 is fixedly connected；Each hydrostatic level 1 is clipped in two arcs of the inside of the arc frame 9 respectively
Among card 12.
In the embodiment above, shaft 8 is laterally set in the horizontal axis set 7 of 5 end of horizontal suspension, and one end rotation of shaft 8 connects
Arc frame 9 is connect, the centering angle of arc frame 9 is more than 180 °, shaft 10 is conveniently arranged on arc frame 9 and by shaft 10 in arc
The arc card 12 for hydrostatic level 1 to be clamped is arranged in the inside of frame 9, and the centering angle of arc card 12 is less than 180 ° so that arc
Card 12 can be with the clamping hydrostatic level 1 of free and stable；Hydrostatic level 1 is clamped in two arc cards of the interior survey of arc frame 9
It among 12, and can bear a heavy burden in the lower end of hydrostatic level 1 so that hydrostatic level 1 is vertical with horizontal plane holding always, reduction pair
The error of wind-force tower measuring for verticality improves detection precision.
The vertical connection sheet 6 connected on horizontal suspension 5 is connect with the madial wall of wind-driven generator tower 4, thus by static level
1 fixation kit of instrument and hydrostatic level 1 are fixedly connected on the madial wall of tower, and multiple hydrostatic levels 1 are separately fixed at tower
On the same cross section of a certain height of cylinder, and multiple spirit level fixation kits and 1 cloth of hydrostatic level are set as axisymmetrical shape, more
It is connected by communicating pipe 3 between a hydrostatic level 1, forms linker, hydrostatic level 1 connects with data collecting system respectively
It connects, to record the height residing for each hydrostatic level 1, hydrostatic level 1 and data collecting system can wirelessly connect
It connects, also, data collecting instrument is also associated with data processing module, data processing module can be monitored by each hydrostatic level 1
Liquid level calculate to obtain angle of inclination and the tilt quantity of wind-driven generator tower 4；In addition, can also be in wind driven generator base
A hydrostatic level 1 is laid on peripheral foundation settlement datum mark, and the settling amount of detection wind-driven generator tower 4 is assisted with this.
Specifically, the method being detected to the verticality of wind-driven generator tower using the detection device is as follows：Step
1, select the same cross-section of a certain height of wind-driven generator tower to be monitored into line tilt, by multiple hydrostatic level fixation groups
Part, which is separately fixed in all directions of selected same cross section, is used as monitoring point, and monitoring points are N, N >=4；Step 2,
Multiple hydrostatic levels are mounted on hydrostatic level fixation kit, ensure hydrostatic level in hydrostatic level fixation kit
On level altitude it is identical, so that the height of multiple hydrostatic levels is on the same cross section of wind-driven generator, multiple static(al)s
It is connected by communicating pipe between spirit level, forms linker；Step 3, it after hydrostatic level installs, is acquired by data
Module hydrostatic level liquid level h each to current timeit, wherein 1≤i≤N, t are the current acquisition moment；Step 4, exist
Maximum value is selected in current multiple hydrostatic level level sensing dataAnd minimum valueAnd according to formulaMaximum value is calculatedAnd minimum valueThe relatively tiltedly poor h of corresponding two monitoring pointst,
The a diameter of D of blower fan tower barrel at the known height, then the moment angle of inclination is θt=arctan (htD), wind turbine tilt quantity is δt=
H×sinθt, wherein H is the height of wind-driven generator tower.
When the verticality of the above detection wind-driven generator tower, it should meet that extraneous wind speed is smaller, and wind turbine is in and shuts down
State reduces detection error with this；Meanwhile the liquid level of the hydrostatic level for monitoring, can also take monitoring one section when
Between the mode that is averaged of data.
Further, it is also possible to using the settling amount of the detection means measure wind-driven generator tower, the specific method is as follows：Step
1, select the same cross-section of a certain height of wind-driven generator tower to be monitored into line tilt, by multiple hydrostatic level fixation groups
Part, which is separately fixed in all directions of selected same cross section, is used as monitoring point, and monitoring points are N, N >=4；Step 2,
Multiple hydrostatic levels are mounted on hydrostatic level fixation kit, ensure hydrostatic level in hydrostatic level fixation kit
On level altitude it is identical, so that the height of multiple hydrostatic levels in wind-driven generator tower is in wind-driven generator tower
On the same cross section of wall；In addition, laying a hydrostatic level on wind driven generator base periphery foundation settlement datum mark；
It is connected by communicating pipe between multiple hydrostatic levels, forms linker；Step 3, pass through data collecting module collected static(al) water
The initial liquid level height h of quasi- instrument10、h20、…hN0、hk0, N is instrument installation number on the inside of blower fan tower barrel, hk0On the basis of put static(al)
Spirit level liquid level；Current time hydrostatic level liquid level h is recorded with fixed frequency respectively1t、h2t、…hNt、hkt, because
This, any measuring point relative datum point height change value is △ h on the inside of tower in the periodit(k)=(hit-hkt)-(hi0-hk0), choosing
Go out maximum, minimum measuring point height change value in the period, calculate wind turbine angle of inclination and tilt quantity, while detection outlet air can be assisted
The settling amount of power generator tower.
Furthermore it is also possible at each wind-driven generator inner wall different height for passing through data collecting module collected different moments
Cross section on the liquid level of hydrostatic level laid, the angle of inclination at different cross section height and inclination is calculated
Amount judges the architecture quality of wind-driven generator tower by comparing each angle of inclination and tilt quantity.
With reference to figure 2, one embodiment according to the present utility model, the shaft 10 is sliding bar, is covered on the shaft 10
Equipped with spiral compression spring 13, one end of the spiral compression spring 13 withstands on the inside of the arc frame 9, and the other end withstands on institute
State the outside of arc card 12.
In the embodiment above, spiral compression spring 13 is housed, one end of spiral compression spring 13 withstands on arc on shaft 10
The inside of shape frame 9, the other end withstand on the outside of arc card 12；Spiral compression spring 13 can make the space in two arc cards 12 with
Meaning variation, is suitable for different types of hydrostatic level 1, and using the elastic reinforcement arc card 12 of spring to hydrostatic level
1 degree of fixation.
With reference to figure 2, one embodiment according to the present utility model is provided with screw thread on the side wall of the shaft 10, described
Shaft 10 is threadedly attached in the both ends of the arc frame 9, the lateral wall of the inner end of the shaft 10 and the arc card 12
Ball bowl connects.
In the embodiment above, the mode that shaft 10 is connected through a screw thread is fixed on the both ends of arc frame 9, shaft 10 it is interior
End is connect with the outside squash bowl of arc card 12, is achieved in and hydrostatic level 1 is stuck among two arc cards 12, also,
Since arc frame 9 is rotatably connected on one end of shaft 8, thus make hydrostatic level 1 that can remain and horizontal plane, improves
The accuracy of the liquid level of hydrostatic level 1, and then improve inspection of the detection device to the verticality of wind-driven generator tower 4
Survey accuracy.
With reference to figure 3, one embodiment according to the present utility model is connected with magnet base 14 in the vertical connection sheet 6, described
Vertical connection sheet 6 is adsorbed on by magnet base 14 on the madial wall of the wind-driven generator tower 4.
In the embodiment above, connection sheet 6 is indulged to be adsorbed on by magnet base 14 on the madial wall of wind-driven generator tower 4,
Facilitate the fixation and dismounting of 4 testing apparatus for verticality of wind-driven generator tower on 4 inner wall of wind-driven generator tower.
With reference to figure 3, one embodiment according to the present utility model is provided with connecting hole in the vertical connection sheet 6, described vertical
Connection sheet 6 is bolted to connection on the madial wall of the tower.
In the embodiment above, it indulges connection sheet 6 to be bolted to connection on the madial wall of the tower, facilitates the wind
Fixation and dismounting of 4 testing apparatus for verticality of power generator tower on 4 inner wall of wind-driven generator tower.
With reference to figure 1, one embodiment according to the present utility model, the multiple hydrostatic level 1 is even number.
In the embodiment above, the hydrostatic level 1 being arranged on 4 madial wall of wind-driven generator tower is even number, and
1 cloth of multiple hydrostatic levels is set as axisymmetrical shape so that multiple hydrostatic levels 1 can be to the more of wind-driven generator tower 4
A angle is monitored, and can more accurately detect the verticality of wind-driven generator tower 4.
Obviously, those skilled in the art can carry out the utility model various modification and variations without departing from this practicality
Novel spirit and scope.If in this way, these modification and variations of the utility model belong to the utility model claims and
Within the scope of its equivalent technologies, then the utility model is also intended to include these modifications and variations.
Claims (6)
1. a kind of wind-driven generator tower testing apparatus for verticality, which is characterized in that including multiple hydrostatic levels (1) and multiple
Hydrostatic level fixation kit (2) passes through communicating pipe (3) connection, each static(al) between the multiple hydrostatic level (1)
Spirit level fixation kit includes：
Horizontal suspension (5), the horizontal suspension (5) are connected with vertical connection sheet (6), and the vertical connection sheet (6) is set to the wind-force hair
On the madial wall of motor tower (4), the end set of the horizontal suspension (5) has a horizontal axis set (7), in the horizontal axis set (7) laterally
It is provided with shaft (8)；
Arc frame (9), the centering angle of the arc frame (9) is more than 180 °, the intermediate position in the outside of the arc frame (9) and institute
State one end rotation connection of shaft (8)；
Two shafts (10), each shaft (10) are each passed through one end of the arc frame (9), two shafts (10)
Mutually conllinear and perpendicular with the shaft (8), one end that the shaft (10) stretches into the inside of the arc frame (9) is inner end,
One end positioned at the outside of the arc frame (9) is outer end, and the outer end of the shaft (10) is connected with catch (11)；
Two arc cards (12), two arc cards (12) are separately positioned on the inside at the both ends of the arc frame (9), described
The centering angle of arc card (12) is less than 180 °, intermediate position and the shaft (10) in the outside of each arc card (12)
Inner end is fixedly connected；
Two arc cards (12) of the inside that each hydrostatic level (1) is clipped in the arc frame (9) respectively are intermediate.
2. wind-driven generator tower testing apparatus for verticality according to claim 1, which is characterized in that the shaft (10)
For sliding bar, the shaft rod upper sleeve is equipped with spiral compression spring (13), and one end of the spiral compression spring (13) withstands on described
The inside of arc frame (9), the other end withstand on the outside of the arc card (12).
3. wind-driven generator tower testing apparatus for verticality according to claim 1, which is characterized in that the shaft (10)
Side wall on be provided with screw thread, the shaft (10) is threadedly attached in the both ends of the arc frame (9), the shaft (10)
Inner end connect with the outside squash bowl of the arc card (12).
4. wind-driven generator tower testing apparatus for verticality according to claim 1, which is characterized in that the vertical connection sheet
(6) magnet base (14) is connected on, the vertical connection sheet (6) is adsorbed on the wind-driven generator tower by magnet base (14)
(4) on madial wall.
5. wind-driven generator tower testing apparatus for verticality according to claim 1, which is characterized in that the vertical connection sheet
(6) connecting hole is provided on, the vertical connection sheet (6) is bolted to connection in the interior of the wind-driven generator tower (4)
On side wall.
6. wind-driven generator tower testing apparatus for verticality according to claim 1, which is characterized in that the multiple static(al)
Spirit level (1) is even number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721634940.1U CN207703207U (en) | 2017-11-30 | 2017-11-30 | A kind of wind-driven generator tower testing apparatus for verticality |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721634940.1U CN207703207U (en) | 2017-11-30 | 2017-11-30 | A kind of wind-driven generator tower testing apparatus for verticality |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207703207U true CN207703207U (en) | 2018-08-07 |
Family
ID=63024502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721634940.1U Expired - Fee Related CN207703207U (en) | 2017-11-30 | 2017-11-30 | A kind of wind-driven generator tower testing apparatus for verticality |
Country Status (1)
| Country | Link |
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| CN (1) | CN207703207U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111536938A (en) * | 2020-04-30 | 2020-08-14 | 三一重能有限公司 | Fan tower settlement monitoring mechanism and monitoring method |
| CN112344909A (en) * | 2020-11-06 | 2021-02-09 | 国核信息科技有限公司 | Method and device for monitoring inclination of fan tower |
| CN114295105A (en) * | 2021-12-30 | 2022-04-08 | 赤峰华源新力科技有限公司 | Novel measure wind power tower cylinder inclination device |
-
2017
- 2017-11-30 CN CN201721634940.1U patent/CN207703207U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111536938A (en) * | 2020-04-30 | 2020-08-14 | 三一重能有限公司 | Fan tower settlement monitoring mechanism and monitoring method |
| CN112344909A (en) * | 2020-11-06 | 2021-02-09 | 国核信息科技有限公司 | Method and device for monitoring inclination of fan tower |
| CN112344909B (en) * | 2020-11-06 | 2022-04-26 | 国核信息科技有限公司 | Method and device for monitoring inclination of fan tower |
| CN114295105A (en) * | 2021-12-30 | 2022-04-08 | 赤峰华源新力科技有限公司 | Novel measure wind power tower cylinder inclination device |
| CN114295105B (en) * | 2021-12-30 | 2024-05-28 | 赤峰华源新力科技有限公司 | Novel measure wind-powered electricity generation tower section of thick bamboo inclination device |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
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| CF01 | Termination of patent right due to non-payment of annual fee |