CN205669804U - Temperature gas cooled reactor steam generator feedwater connecting tube single poling attachment structure - Google Patents
Temperature gas cooled reactor steam generator feedwater connecting tube single poling attachment structure Download PDFInfo
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- CN205669804U CN205669804U CN201620536092.XU CN201620536092U CN205669804U CN 205669804 U CN205669804 U CN 205669804U CN 201620536092 U CN201620536092 U CN 201620536092U CN 205669804 U CN205669804 U CN 205669804U
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- feedwater
- connecting tube
- tube
- section
- attachment structure
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Abstract
The utility model discloses a kind of temperature gas cooled reactor steam generator feedwater connecting tube single poling attachment structure, including feedwater tube sheet (1), spiral heat exchange tube (3), with feedwater connecting tube (2), described feedwater connecting tube (2) one end is connected with feedwater tube sheet (1), the other end is connected with spiral heat exchange tube (3), described feedwater connecting tube (2) includes multiple straight section and multiple transition bend, feedwater connecting tube (2) can rotate along tube bore axis after being connected with feedwater tube sheet (1), the upper all of transition bend of feedwater connecting tube (2) is all in perpendicular.This utility model has filled up the blank in this field, achieve single poling, reduce poling difficulty and risk, and in limited space, be provided with many groups connect the feedwater connecting tube of tube bank (7), it is possible to meet Flow vibration, thermal stress, weld, the requirement such as assembling.
Description
Technical field
This utility model relates to nuclear power generating equipment field, particularly relates to a kind of temperature gas cooled reactor steam generator feedwater connecting tube
Single poling attachment structure.
Background technology
Temperature gas cooled reactor steam generator feedwater connecting tube is that steam generator connects spiral heat exchange tube and feedwater tube sheet
Bridge.How to arrange in limited space and disclosure satisfy that Flow vibration, thermal stress, welding, fixed bearing, it is achieved single wear
Pipe, reduces poling difficulty and risk is the key that feedwater connecting tube designs.
It is reported that Germany's once design is disclosed the vaporizer of major diameter spiral coil, belong to the installation side of non-modular
Formula, i.e. uses independent major diameter tube bank to connect.And assembly type is had in limited space lining is put, minor spiral
The vaporizer of coil pipe, but cannot realize.
Chinese patent CN201944823U discloses the attachment structure of a kind of temperature gas cooled reactor steam generator connecting pipe, bag
Include steam (vapor) outlet tube sheet, spiral heat exchange tube, spiral heat exchange tube is provided with the steam of multi units tube bundle by geometric arrangements and goes out
Mouth connecting tube, steam (vapor) outlet connecting tube is as connecting the bridge of spiral heat exchange tube and steam feedwater tube sheet all by transition bend mistake
Crossing connection, the steam (vapor) outlet connecting tube after connection all has two kinds of transition bends: plane of bending is perpendicular to the transition bend of horizontal plane
With the transition bend that plane of bending is parallel to horizontal plane, described horizontal plane is the plane at spiral heat exchange tube place, when mounted, needs
First all of steam (vapor) outlet connecting tube is installed according to default requirement after connecting as entirety again with steam (vapor) outlet
Tube sheet connects, and the steam (vapor) outlet connecting tube after connecting described in installation process can not rotate along tube bore axis direction, because of
The transition bend that plane of bending all can be caused to be perpendicular to horizontal plane for the rotation of any angle is parallel to horizontal plane with plane of bending
Transition bend pile up, so manufacturing process and assembly technology are had high requirement.Therefore, this attachment structure
Being only used for overall poling, it is impossible to realize single poling, assembly difficulty is big, and poling quality and poling are inefficient.
For above-mentioned reasons, the present inventor's attachment structure to existing temperature gas cooled reactor steam generator feedwater connecting tube
Conduct in-depth research, in order to design can realize that the mounting means of single poling can arrange again in limited space can
Meet Flow vibration, thermal stress, welding, the attachment structure of fixed supported feedwater connecting tube.
Utility model content
In order to overcome the problems referred to above, present inventor has performed and study with keen determination, design a kind of HTGR steam generation
The attachment structure of the device feedwater single poling of connecting tube, it is possible to realize single poling and disclosure satisfy that Flow vibration, thermal stress, it is simple to weldering
Connect, fix connection, be substantially reduced assembly difficulty, improve poling quality and poling efficiency.
Specifically, the purpose of this utility model be provide following aspect:
First aspect, a kind of temperature gas cooled reactor steam generator feedwater connecting tube single poling attachment structure, its feature exists
In, including feedwater tube sheet 1, spiral heat exchange tube 3 and the feedwater connecting tube 2 of steam generator, wherein, described feedwater connecting tube 2 one
Holding and be connected with feedwater tube sheet 1, the other end is connected with spiral heat exchange tube 3.
Second aspect, according to described in first aspect feed water the single poling of connecting tube attachment structure, it is characterised in that described
Feedwater connecting tube 2 includes multiple straight section and multiple transition bend,
Described straight section includes laterally disposed straight section and the vertical straight section placed,
Described transition bend includes being bent into U-shaped or V-arrangement or Z-shaped elbow.
The third aspect, according to described in second aspect feed water the single poling of connecting tube attachment structure, it is characterised in that described
U-shaped transition bend, for connecting two laterally disposed straight sections or the straight section of two vertical placements, wherein, is laterally put for described two
The straight section put is in same perpendicular.
Fourth aspect, according to described in second aspect feed water the single poling of connecting tube attachment structure, it is characterised in that described
V-arrangement transition bend is for connecting the straight section of vertical placement and laterally disposed straight section.
5th aspect, according to described in second aspect feed water the single poling of connecting tube attachment structure, it is characterised in that described
Z-shaped transition bend is for connecting two laterally disposed straight sections or the straight section of two vertical placements.
6th aspect, according to described in second aspect feed water the single poling of connecting tube attachment structure, it is characterised in that described
In feedwater connecting tube 2, all adjacent transition bends are all in perpendicular.
7th aspect, according to described in first aspect feed water the single poling of connecting tube attachment structure, it is characterised in that described
Feedwater connecting tube 2 is bundled into connection tube bank 7 by pipe clamp 4,
Wherein, described connection tube bank 7 includes many feedwater connecting tubes 2,
Described pipe clamp 4 has two or more clamp.
Eighth aspect, according to described in the 7th aspect feed water the single poling of connecting tube attachment structure, it is characterised in that described
The combined shaped of pipe clamp 4 is triangle or rectangle or hexagon or polygon.
9th aspect, according to described in the 7th aspect feed water the single poling of connecting tube attachment structure, it is characterised in that described
Connect tube bank 7 and include convergence section (71), rule section 72 and divergent section 73 successively,
Described convergence section 71 one end is connected with spiral heat exchange tube bundle 5, and the other end is connected with rule section 72,
Described divergent section 73 one end is connected with feedwater tube sheet 1, and the other end is connected with rule section 72.
Tenth aspect, according to described in the 9th aspect feed water the single poling of connecting tube attachment structure, it is characterised in that converge
The distance between many feedwater connecting tubes 2 in poly-section 71 is progressively smaller until and is connected with rule section 72, in rule section 72
Many feedwater connecting tubes 2 are parallel to each other until being connected with divergent section 73, in divergent section many feed water between connecting tubes 2 away from
From being gradually increased until being connected with feedwater tube sheet 1.
The structure of the temperature gas cooled reactor steam generator provided by the utility model feedwater single poling of connecting tube, fills up
The blank of the vaporizer of middle spiral coil, and it is capable of single poling, greatly reduce poling difficulty and poling risk, energy
In limited space, enough arrange the many groups of connection tube banks 7 meeting Flow vibration, thermal stress, welding.
Accompanying drawing explanation
Fig. 1 illustrates the temperature gas cooled reactor steam generator feedwater connecting tube according to a kind of preferred implementation of this utility model
The structural representation of single poling.
Fig. 2 illustrates the structural representation of spiral heat exchange tube in Fig. 1.
Fig. 3 illustrates the Z-shaped transition bend of a kind of preferred implementation of this utility model.
Fig. 4-a illustrates the V-arrangement transition bend that angle is 90 ° of a kind of preferred implementation of this utility model.
Fig. 4-b illustrates the V-arrangement transition bend that angle is 45 ° of a kind of preferred implementation of this utility model.
Fig. 5 illustrates U-shaped transition bend.
Fig. 6-a illustrates the square pipe clamp 4 of a kind of preferred implementation of this utility model.
Fig. 6-b illustrates the rectangle pipe clamp 4 of a kind of preferred implementation of this utility model.
Fig. 6-c illustrates the triangle pipe clamp 4 of a kind of preferred implementation of this utility model.
Fig. 6-d illustrates the hexagon pipe clamp 4 of a kind of preferred implementation of this utility model.
Fig. 7 illustrates the structural representation connecting tube bank of a kind of preferred implementation of the present invention.
Fig. 8 illustrates the structural representation connecting tube bank of a kind of preferred implementation of the present invention.
Drawing reference numeral explanation
1-feeds water tube sheet
2-feeds water connecting tube
3-spiral heat exchange tube
4-pipe clamp
5-spiral heat exchange tube bundle
6-location-plate
7-connects tube bank
71-convergence section
72-rule section
73-divergent section
T01-the first straight section
T02-the second straight section
T03-the 3rd straight section
T04-the 4th straight section
T05-the 5th straight section
Detailed description of the invention
Below by drawings and Examples, this utility model is further described.Being illustrated by these, this practicality is new
The feature of type and advantage will become more apparent from clearly.
The most special word " exemplary " means " as example, embodiment or illustrative ".Here as " exemplary "
Illustrated any embodiment should not necessarily be construed as preferred or advantageous over other embodiments.Although embodiment shown in the drawings is each
Kind aspect, but unless otherwise indicated, it is not necessary to accompanying drawing drawn to scale.
In this utility model, with spiral heat exchange tube 3 place plane as horizontal plane, the plane being perpendicular to horizontal plane is vertical
Plane.Described laterally for being parallel to horizontal plane or having a direction of certain angle with horizontal plane, described be vertically perpendicular or
The direction angled with perpendicular, described certain angle is more than 0 ° less than 180 °, and concrete angle can be wanted according to product
Ask setting.
In the present invention, the angle of V-arrangement transition bend, in the range of 0 °～180 °, can be any angle in the range of this
Degree, such as 30 °, 45 °, 60 °, 90 °, 150 °, concrete angle can set according to product requirement.Accompanying drawing of the present invention only gives
The schematic diagram of the V-arrangement transition bend of 45 ° and 90 °, but V-arrangement transition bend of the present invention includes but not limited to 45 ° and the V of 90 °
Shape transition bend.
As in figure 2 it is shown, spiral heat exchange tube 3 is assembled spiral heat exchange tube bundle 5, fix with location-plate 6, spiral heat exchange tube bundle
The cross section of the spiral heat exchange tube 3 that 5 comprise constitutes a geometry, wherein, geometry can be triangle, rectangle, six
Limit shape or polygon.
A kind of temperature gas cooled reactor steam generator feedwater connecting tube single poling attachment structure that this utility model provides, bag
Include the feedwater tube sheet 1 of steam generator, spiral heat exchange tube 3 and feedwater connecting tube 2, wherein, described feedwater connecting tube 2 one end with give
Water tube plate 1 is connected, and the other end is connected with spiral heat exchange tube 3.
Wherein, described feedwater connecting tube 2 includes multiple straight section and multiple transition bend, and described straight section includes laterally disposed
Straight section and the vertical straight section placed, described transition bend include but not limited to be bent into Z-shaped transition bend as shown in Figure 3, as
V-arrangement transition bend shown in Fig. 4-a and 4-b and U-shaped transition bend as shown in Figure 5.
Described U-shaped transition bend is for connecting two laterally disposed straight sections or the straight section of two vertical placements, wherein, institute
State two laterally disposed straight sections in same perpendicular, described V-arrangement transition bend for connect vertical placement straight section and
Laterally disposed straight section, described Z-shaped transition bend is used for connecting two laterally disposed straight sections or the straight section of two vertical placements,
Described two laterally disposed straight sections are in same perpendicular.
In one preferred embodiment, in the connecting tube 2 that feeds water, all adjacent transition bends are all in perpendicular.
Below in conjunction with accompanying drawing, this utility model is further described.
Temperature gas cooled reactor steam generator feedwater connecting tube single poling attachment structure as shown in Figures 1 to 5, including steaming
The feedwater tube sheet 1 of vapour generator, spiral heat exchange tube 3 and feedwater connecting tube 2, in the present embodiment, connect on described spiral heat exchange tube 3
It is connected to the first straight section T01 vertically placed, makes described straight section by V-shaped transition bend and the second laterally disposed straight section T02
Connecting, described the second laterally disposed straight section T02 is connected with vertical the 3rd straight section T03 placed by V-arrangement transition bend, described
Vertical the 3rd straight section T03 placed is connected with vertical the 4th straight section T04 placed by V-arrangement transition bend, vertically the of placement
Four straight section T04 are connected a piece complete feedwater connecting tube 2 of composition by V-arrangement transition bend with vertical the 5th straight section T05 placed,
The 5th straight section T05 making described vertical placement is connected with the feedwater tube sheet 1 of steam generator.
In this utility model, in units of an independent feedwater connecting tube 2, it is connected tube sheet 1 with feedwater connects, and
With all of feedwater connecting tube 2, to be an entirety is not connected tube sheet 1 with feedwater connects, and, the connecting tube 2 that feeds water comprises
All transition bends are all in vertical plane, and therefore, feedwater connecting tube 2 can rotate along tube bore axis direction after penetrating feedwater tube sheet 1,
Avoid connecting between tube bank and mutually collide, it is simple to feedwater connecting tube 2 poling and welding with spiral heat exchange tube 3.
Consider practical application effect, arrange in limited space and meet the requirements such as Flow vibration, thermal stress, fixed bearing
Feedwater connecting tube 2 be necessary for corresponding transition bend, by transition bend can eliminate tube bank expand produced secondary should
Power.
Considering single poling, all transition bends that feedwater connecting tube 2 includes are each perpendicular to horizontal plane, more preferably
, all transition bends are all in same perpendicular, it is achieved that feedwater connecting tube 2 can be along pore after penetrating feedwater tube sheet 1
Axis rotates, it is simple to feedwater connecting tube 2 is welded with spiral heat exchange tube 3.
The feedwater tube sheet 1 of the present embodiment is horizontal positioned, can place the most in other forms, and the connecting tube 2 that feeds water
As steam from spiral heat exchange tube 3 to the bridge of feedwater tube sheet 1, its shape and installation site also can be varied from.
It addition, in actual applications, it is considered to transition bend quantity limits and poling difficulty, can stay between feedwater connecting tube 2
Certain interval, but its gap must be minimized, and utilizes pipe clamp 4 to be removed in described gap in this utility model, described to reduce
Slip between feedwater connecting tube 2, increases the rigidity of tube bank.
In this utility model, pipe clamp 4 is utilized to be tied to connect tube bank by single or many feedwater connecting tube 2, to reduce
Slip between described feedwater connecting tube 2, increases the rigidity of tube bank.
In this utility model, the described feedwater connecting tube 2 connecting tube bank includes many feedwater connecting tubes 2, main basis
Flow vibration calculates depending on requiring.
In one preferred embodiment, described connection tube bank 7 includes convergence section 71, rule section 72 and divergent section successively
73,
Described convergence section 71 one end is connected with spiral heat exchange tube bundle 5, and the other end is connected with rule section 72,
Described divergent section 73 one end is connected with feedwater tube sheet 1, and the other end is connected with rule section 72.
It is highly preferred that the many distances fed water between connecting tubes 2 in convergence section 71 are progressively smaller until and rule section
72 are connected, and many feedwater connecting tubes 2 in rule section 72 are parallel to each other until being connected with divergent section 73, many in divergent section
Distance between root feedwater connecting tube 2 is gradually increased until being connected with feedwater tube sheet 1.
In one preferred embodiment, many feedwater connecting tubes 2 in rule section 72 are parallel to each other, and, institute
State the distance between many feedwater connecting tubes 2 equal.
In one preferred embodiment, every feedwater in convergence section 71, rule section 72 and divergent section 73 connects
Pipe 2 can include one or more transition bend, it is also possible to does not has transition bend, it is furthermore preferred that described transition bend is all perpendicular
In facing directly.In one preferred embodiment, as it is shown in fig. 7, every feedwater connecting tube 2 in convergence section 71 comprises a V
Shape transition bend, convergence section 71 is connected with rule section 72 by V-arrangement transition bend, every feedwater connecting tube in rule section 72
2 comprise a V-arrangement transition bend, and rule section 72 is connected with divergent section 73 by V-arrangement transition bend, every in divergent section 73
Feedwater connecting tube 2 comprises a V-arrangement transition bend.
In actual application, every feedwater connecting tube 2 all includes multiple transition bend, further through pipe clamp 4 by many feedwater
Connecting tube 2 is bundled into connection tube bank 7, makes the connecting tube 2 that feeds water in therefore the plurality of transition bend being arranged on perpendicular
Can rotate along tube bore axis direction after penetrating feedwater tube sheet 1, it is to avoid connect and mutually collide between tube bank 7, it is simple to feedwater connecting tube 2
Poling and welding with spiral heat exchange tube 3.
In this utility model, the feedwater connecting tube 2 connecting tube bank of indication is a heat exchange unit, and each heat exchange list
Unit is made up of the feedwater connecting tube of n root heat exchange.In the application, heat exchange unit quantity and each group of heat exchange unit number of tubes can roots
Depending on evaporator heat exchange power.
In one preferred embodiment, pipe clamp 4 has two or more clamp.
In this utility model, the combined shaped of pipe clamp 4 is the clamp of N limit shape.During application, this pipe clamp 4 be shaped as three
Dihedral, square, rectangle or polygon.The shape making its pipe clamp 4 is consistent with the described cross sectional shape connecting tube bank assembled.
In this utility model, as shown in Fig. 6-a, 6-b, 6-c and 6-d, described pipe clamp 4 is the N limit symmetrical by two
The clamp composition of shape, the joint of each clamp is with the connection member for fastening, and type of attachment is optional to be connected with, sell
Axle connects or any one or more type of attachment in welding, and in figure, circled positions is optional link position, but is not limited to this position.
In this utility model, described pipe clamp 4 is to use two symmetrical clamp compositions.In addition, described pipe
Folder 4 can also is that asymmetrical clamp forms.
In this utility model, according to application characteristic, if feedwater tube sheet 1, spiral heat exchange tube 3, outside the pipe of feedwater connecting tube
When velocity of medium, temperature etc. change, the shape of feedwater connecting tube 2 also can be varied from.
In one preferred embodiment, it is achieved the temperature gas cooled reactor steam generator feedwater connecting tube list shown in Fig. 1
The method of root poling attachment structure, the method comprises the following steps:
Step 1): choose a wherein feedwater connecting tube 2, penetrate in the pore of feedwater tube sheet 1 correspondence；
Step 2): described feedwater connecting tube 2 is rotated to an angle, makes feedwater connecting tube 2 vertically place spiral shell with corresponding
The straight length of rotation heat exchanger tube 3 aligns and welds；
Step 3): repeat step 1) and step 2) until all of feedwater connecting tube 2 all with tube sheet 1 and the spiral heat exchange of feeding water
Pipe 3 is connected.
In one preferred embodiment, the method also includes step 4): by pipe clamp 4, feedwater connecting tube is bundled into
Connecting tube bank, described connection tube bank 7 includes many feedwater connecting tubes 2.
Temperature gas cooled reactor steam generator provided by the utility model feedwater connecting tube single poling attachment structure also may be used
To realize overall poling.
Being preferably carried out in mode at one, transition bend described in this utility model is to be bent by feedwater connecting tube end
Form.
Above in association with being preferred embodiment illustrated this utility model, but these embodiments are only models
Example, only play illustrative effect.On this basis, this utility model can be carried out multiple replacement and improvement, these
Each fall within protection domain of the present utility model.
Claims (10)
1. a temperature gas cooled reactor steam generator feedwater connecting tube single poling attachment structure, it is characterised in that include steam
The feedwater tube sheet (1) of generator, spiral heat exchange tube (3) and feedwater connecting tube (2), wherein, described feedwater connecting tube (2) one end with
Feedwater tube sheet (1) is connected, and the other end is connected with spiral heat exchange tube (3).
The attachment structure of the feedwater single poling of connecting tube the most according to claim 1, it is characterised in that described feedwater connecting tube
(2) multiple straight section and multiple transition bend are included,
Described straight section includes laterally disposed straight section and the vertical straight section placed,
Described transition bend includes being bent into U-shaped or V-arrangement or Z-shaped elbow.
The attachment structure of the feedwater single poling of connecting tube the most according to claim 2, it is characterised in that described U-shaped transition is curved
Head is for connecting two laterally disposed straight sections or the straight section of two vertical placements, wherein, described two laterally disposed straight sections
In same perpendicular.
The attachment structure of the feedwater single poling of connecting tube the most according to claim 2, it is characterised in that described V-arrangement transition is curved
Head is for connecting the straight section of vertical placement and laterally disposed straight section.
The attachment structure of the feedwater single poling of connecting tube the most according to claim 2, it is characterised in that described Z-shaped transition is curved
Head is for connecting two laterally disposed straight sections or the straight section of two vertical placements.
The attachment structure of the feedwater single poling of connecting tube the most according to claim 2, it is characterised in that described feedwater connecting tube
(2) upper all adjacent transition bends are all in perpendicular.
The attachment structure of the feedwater single poling of connecting tube the most according to claim 1, it is characterised in that described feedwater connecting tube
(2) it is bundled into connection tube bank (7) by pipe clamp (4),
Wherein, described connection tube bank (7) includes many feedwater connecting tubes (2),
Described pipe clamp (4) has two or more clamp.
The attachment structure of the feedwater single poling of connecting tube the most according to claim 7, it is characterised in that described pipe clamp (4)
Combined shaped is triangle or rectangle or hexagon or polygon.
The attachment structure of the feedwater single poling of connecting tube the most according to claim 7, it is characterised in that described connection is restrained
(7) convergence section (71), rule section (72) and divergent section (73) are included successively,
Described convergence section (71) one end is connected with spiral heat exchange tube bundle (5), and the other end is connected with rule section (72),
Described divergent section (73) one end is connected with feedwater tube sheet (1), and the other end is connected with rule section (72).
10. according to the attachment structure of the single poling of connecting tube that feeds water described in claims 9, it is characterised in that in convergence section
(71) distance between many feedwater connecting tube (2) in is progressively smaller until and is connected with rule section (72), in rule section (72)
Many interior feedwater connecting tubes (2) are parallel to each other until being connected with divergent section (73), many feedwater connecting tubes in divergent section
(2) distance between is gradually increased until being connected with feedwater tube sheet (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620536092.XU CN205669804U (en) | 2016-06-02 | 2016-06-02 | Temperature gas cooled reactor steam generator feedwater connecting tube single poling attachment structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620536092.XU CN205669804U (en) | 2016-06-02 | 2016-06-02 | Temperature gas cooled reactor steam generator feedwater connecting tube single poling attachment structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205669804U true CN205669804U (en) | 2016-11-02 |
Family
ID=57194462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620536092.XU Expired - Fee Related CN205669804U (en) | 2016-06-02 | 2016-06-02 | Temperature gas cooled reactor steam generator feedwater connecting tube single poling attachment structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205669804U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105823034A (en) * | 2016-06-02 | 2016-08-03 | 哈电集团（秦皇岛）重型装备有限公司 | Single-pipe passing connection structure for water supply connecting pipe of high-temperature gas cooled reactor steam generator |
-
2016
- 2016-06-02 CN CN201620536092.XU patent/CN205669804U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105823034A (en) * | 2016-06-02 | 2016-08-03 | 哈电集团（秦皇岛）重型装备有限公司 | Single-pipe passing connection structure for water supply connecting pipe of high-temperature gas cooled reactor steam generator |
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| 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: 20161102 Termination date: 20190602 |