CN215164623U - Prefabricated small box girder bridge hanger formula centralized drainage device - Google Patents
Prefabricated small box girder bridge hanger formula centralized drainage device Download PDFInfo
- Publication number
- CN215164623U CN215164623U CN202120267077.0U CN202120267077U CN215164623U CN 215164623 U CN215164623 U CN 215164623U CN 202120267077 U CN202120267077 U CN 202120267077U CN 215164623 U CN215164623 U CN 215164623U
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- Prior art keywords
- drain pipe
- longitudinal
- hanger
- drainage device
- box girder
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 109
- 239000010959 steel Substances 0.000 claims abstract description 109
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 39
- 239000011384 asphalt concrete Substances 0.000 claims description 7
- 239000004567 concrete Substances 0.000 claims description 4
- 230000003139 buffering effect Effects 0.000 claims 1
- 239000003292 glue Substances 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 6
- 239000012141 concentrate Substances 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000002411 adverse Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract 1
- 238000009434 installation Methods 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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Abstract
The utility model belongs to the technical field of bridge design and construction, concretely relates to prefabricated little case girder bridge hanger bracket type concentrates drainage device, including drainage device and fixing device, drainage device is vertical water-drain pipe, elbow, three way connection, vertical drain pipe, fixing device is jib screw-thread steel, gallows angle steel, round steel pipe card, arc steel sheet, vertical drain pipe connection total drain pipe, and total drain pipe connection abutment or pier side cause ground. The utility model discloses an effective effect does: adopt the drainage device is concentrated to hanger bracket formula, can satisfy the concentrated drainage demand of bridge floor, can guarantee the reliable fixed of longitudinal drain pipe again to can freely adjust longitudinal drain pipe height and horizontal position, can realize the drainage of adverse slope, have linear pleasing to the eye, simple to operate, long service life and later stage maintenance change advantage such as simple and convenient.
Description
Technical Field
The utility model belongs to the technical field of bridge design and construction, concretely relates to drainage device is concentrated to prefabricated little case girder bridge hanger formula.
Background
When water source protection grounds such as reservoir, river are strideed across to prefabricated small box girder bridge, need set up longer concentrated drainage paragraph, the vertical drain pipe diameter increases along with concentrated drainage paragraph length increase, and traditional concentrated drainage adopts the vertical drain pipe of iron ring parcel, and it is fixed to squeeze into the small box girder through expansion bolts, has both destroyed the roof beam body and is difficult to guarantee linear smooth-going and durability, and life is shorter, and the high altitude construction time is long when changing comparatively difficultly, and the safety risk is higher, and the change time is longer, and the quality is difficult to control.
SUMMERY OF THE UTILITY MODEL
To the technical problem that exists at present, the utility model provides a drainage device is concentrated to prefabricated little case girder bridge hanger formula adopts hanger formula to concentrate drainage device, can satisfy long paragraph bridge floor and concentrate the drainage demand, can guarantee the reliable fixed of vertical drain pipe again to can freely adjust vertical drain pipe height and transverse position, realize the adverse slope drainage, have linear pleasing to the eye, operate simple and easy, simple to operate, long service life and later stage maintenance change advantage such as simple and convenient.
The technical scheme of the utility model as follows:
a prefabricated small box girder bridge hanging bracket type centralized drainage device comprises a drainage device and a fixing device; the drainage device comprises a vertical drain pipe, an elbow, a three-way joint and a longitudinal drainage pipe, wherein the drain pipe penetrates through a prefabricated small box girder cantilever, a C50 concrete layer and an asphalt concrete layer on the inner side of the guardrail, the bottom of the vertical drain pipe is connected with one end of the three-way joint through the elbow, and the other opposite two ends of the three-way joint are respectively connected with the longitudinal drainage pipe; the fixing device comprises hanger threaded steel, hanger angle steel, a round steel pipe clamp and an arc-shaped steel plate, wherein the two hanger threaded steel are respectively positioned at symmetrical positions on two sides of the longitudinal drain pipe; the top of the hanger angle steel is provided with an arc-shaped steel plate matched with the longitudinal drain pipe, the arc-shaped steel plate is positioned between the two symmetrical hanger rod deformed steels, and the top of the hanger angle steel is provided with two strip-shaped through holes which are respectively positioned at two ends of the arc-shaped steel plate; the arc-shaped steel plate is in contact connection with the bottom of the longitudinal drain pipe; the round steel pipe clamp surrounds the upper part of the longitudinal water drainage pipe, two ends of the round steel pipe clamp penetrate through the long-strip through hole and are movably connected with the hanger angle steel respectively, the longitudinal water drainage pipe is connected with the main water drainage pipe, and the main water drainage pipe is connected with the bridge abutment or the side surface of the bridge pier and leads to the ground.
Preferably, a buffer ring is sleeved at the contact position of the longitudinal water drainage pipe and the arc-shaped steel plate and the round steel pipe clamp; further preferably, the buffer plate is a rubber ring; further preferably, the buffer ring is connected with the longitudinal drain pipe in an adhesive mode, and therefore bonding compactness is guaranteed. The buffer ring is arranged for stabilizing the position of the longitudinal drain pipe on one hand and for protecting the longitudinal drain pipe on the other hand.
Further preferably, the width of each buffer ring is larger than the width of the arc-shaped steel plate and the diameter of the round steel pipe clamp.
Preferably, the bend is a 90 ° bend.
Preferably, the threaded steel of the hanger rod is positioned at the front and the rear positions close to the longitudinal direction of the vertical drain pipe, so that the construction is convenient, and the stability of the structure is more facilitated.
Preferably, the top of the vertical water drain pipe is provided with the rainwater grate, the elevation and the slope rate of the top of the rainwater grate and the asphalt concrete are consistent, the rainwater on the bridge floor can effectively enter the vertical water drain pipe through meshes of the rainwater grate, and the appearance is also favorable.
Preferably, two symmetrical jib screw-thread steels do with gallows angle steel both ends swing joint's mode respectively: two symmetrical hanger rod screw-thread steels pass through rectangular notches formed in two ends of hanger frame angle steel and are fixed through nuts. So as to be convenient for the installation of the longitudinal water discharge pipe to transversely move and adjust the line shape.
Preferably, the tee fitting is a reducing tee fitting.
Preferably, the top of the vertical water drain pipe is of a funnel structure, so that more rainwater can be collected conveniently.
The utility model discloses can select the elbow of different angles according to the needs of reality.
The utility model discloses in, the rainwater of bridge floor can be collected to vertical water-drain pipe, connect three way connection's one end through the elbow, longitudinal drain pipe is connected respectively at opposite both ends in addition, the position of the more nimble control longitudinal drain pipe of design of elbow, and then the diameter size of control longitudinal drain pipe, because prefabricated little case roof beam cantilever length is limited, if do not design the elbow, prefabricated little case roof beam will influence the diameter specification that uses longitudinal drain pipe and the height of longitudinal drain pipe, can't install and longitudinal drain pipe height is difficult to adjust when the diameter specification of longitudinal drain pipe is great, seriously influence the drainage condition of longer paragraph; the elbow is connected to the three-way joint, and the longitudinal drain pipe is connected through the three-way joint, so that long-section drainage can be performed; meanwhile, the angle of the elbow and the angle of the tee joint can control the reverse slope drainage; the utility model provides a support for the longitudinal drain pipe through hanging hanger rod screw steel and hanger angle steel, and simultaneously the position of the longitudinal drain pipe is more conveniently controlled through the arc-shaped steel plate and the round steel pipe clamp, the longitudinal drain pipe is placed on the arc-shaped steel plate, the stress area of the longitudinal drain pipe is increased, and because two strip-shaped through holes are arranged at the top of the hanger angle steel, the round steel pipe clamp can conveniently adjust the position of the longitudinal drain pipe; the utility model discloses the setting can not be to the bridge top of the direct drainage in ground such as water source protection grounds such as reservoir, river, through setting up the vertical water-drain mast of a plurality of, through vertical drain pipe and three way connection intercommunication, through fixing device fixed drain pipe and vertical water-drain mast, can satisfy the drainage of longer paragraph between the vertical water-drain mast.
The utility model has the advantages that: the hanging bracket type centralized drainage device can meet the centralized drainage requirement of long-section bridge floors, can ensure the reliable fixation of the longitudinal drainage pipes, can freely adjust the height and the transverse position of the longitudinal drainage pipes, realizes the drainage on a reverse slope, and has the advantages of attractive line shape, simplicity and easiness in operation, convenience in installation, long service life, simplicity and convenience in later-stage maintenance and replacement and the like.
Drawings
FIG. 1 is a schematic cross-sectional view of the vertical water drain pipe of the present invention;
FIG. 2 is a schematic cross-sectional view along the threaded steel of the hanger rod according to the present invention;
FIG. 3 is a schematic longitudinal section along the direction of the drainage pipe according to the present invention;
in the drawing, 1 is vertical water drain pipe, 2 is the elbow, 3 is the gallows angle steel, 4 is jib screw-thread steel, 5 is prefabricated trabecula cantilever, 6 is the guardrail, 7 is the rainwater grate, 8 is asphalt concrete layer, 9 is C50 concrete layer, 10 is the arc steel sheet, 11 is vertical drain pipe, 12 is the cushion ring, 13 is three way connection, 14 is the round steel pipe strap, 15 is prefabricated trabecula, 16 is the pier, 17 is total drain pipe.
Detailed Description
The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by the teaching of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as the present invention, fall within the protection scope of the present invention.
As shown in fig. 1-3, the utility model provides a prefabricated small box girder bridge hanger type centralized drainage device, which comprises a drainage device and a fixing device; the drainage device comprises a vertical water drain pipe 1, a 90-degree elbow, a reducing tee joint and a longitudinal drainage pipe 11, wherein the vertical water drain pipe 1 penetrates through a prefabricated small box girder cantilever 5, a C50 concrete layer 9 and an asphalt concrete layer 8 on the inner side of a guardrail, the top of the vertical water drain pipe 1 is of a funnel structure, more rainwater can be collected conveniently, the bottom of the vertical water drain pipe 1 is connected with one end of the reducing tee joint through an elbow 2, and the other opposite two ends of the reducing tee joint are respectively connected with the longitudinal drainage pipe 11; the fixing device comprises hanger rod screw-thread steels 4, hanger angle steels 3, round steel pipe clamps 14, arc-shaped steel plates 10 and rubber rings, wherein the two hanger rod screw-thread steels 4 are respectively positioned at symmetrical positions on two sides of a longitudinal water drainage pipe 11; the top of the suspender deformed steel bar 4 is fixedly connected with a prefabricated small box girder cantilever 5, the symmetrical suspender deformed steel bars 4 are positioned at the front and rear positions close to the longitudinal direction of the vertical water drain pipes 1, and the two groups of symmetrical suspender deformed steel bars 4 are used for fixing the positions of the vertical water drain pipes 1, the reducing tee joints, the 90-degree elbows and the longitudinal water drain pipes, so that the construction is facilitated, the stability of the structure is further facilitated, namely the symmetrical suspender deformed steel bars 4 are arranged at the positions between every two vertical water drain pipes 1, and meanwhile, in order to ensure the stability of the longitudinal water drain pipes 11, a plurality of groups of symmetrical suspender deformed steel bars 4 can be hung between every two vertical water drain pipes 1; two symmetrical hanger rod screw-thread steels 4 pass through rectangular notches formed at two ends of a hanger angle steel 3 and are fixed with the hanger angle steel 3 through nuts, the hanger angle steel 3 is arranged below the longitudinal drain pipe 11, and the rectangular notches are formed so as to facilitate the transverse movement and linear adjustment during the installation of the longitudinal drain pipe 11; the top of the hanger angle steel 3 is provided with an arc-shaped steel plate 10 matched with the longitudinal drain pipe 11, the longitudinal drain pipe 11 is placed on the arc-shaped steel plate 10, the stress area of the longitudinal drain pipe 11 is increased, the arc-shaped steel plate 10 is positioned between the symmetrical hanger threaded steels 4, the top of the hanger angle steel 3 is provided with two strip-shaped through holes which are respectively positioned at two ends of the arc-shaped steel plate 10, and the strip-shaped through holes can be conveniently adjusted in a linear shape by moving transversely when the longitudinal drain pipe 11 is installed; the arc-shaped steel plate 10 is in contact connection with the bottom of the longitudinal drain pipe 11; the round steel pipe clamp 14 surrounds the upper part of the longitudinal drain pipe 11, two ends of the round steel pipe clamp respectively penetrate through the long through hole to be movably connected with the hanger angle steel 3, and the round steel pipe clamp 14 can move in the long through hole to further adjust the position of the longitudinal drain pipe 11; the longitudinal drain pipe 11 is sleeved with a buffer ring 12 at the position where the arc-shaped steel plate 10 and the round steel pipe clamp 14 are in contact with each other, the buffer ring 12 is a rubber ring, the rubber ring is connected with the longitudinal drain pipe 11 through adhesive, so that the adhesion is tight, and the rubber ring is arranged to stabilize the position of the longitudinal drain pipe 11 and protect the longitudinal drain pipe 11; the width of the rubber ring is larger than the width of the arc-shaped steel plate 10 and the diameter of the circular steel pipe clamp 14; the top of the vertical water drain pipe 1 is provided with the rainwater grate 7, the elevation and the slope rate of the top of the rainwater grate 7 are consistent with those of the asphalt concrete layer 8, the rainwater on the bridge floor can effectively enter the vertical water drain pipe 1 through meshes of the rainwater grate, and the appearance is also favorable; the longitudinal drainage pipe 11 is connected with a main drainage pipe 17, the main drainage pipe 17 is connected with a pier 16 or the side surface of a bridge abutment and led to the ground, the longitudinal drainage pipe 11 is inclined to the direction of the main drainage pipe 17, water can be conveniently drained to the main drainage pipe 17 through the longitudinal drainage pipe 11, a bridge spans over water source protection places such as a reservoir and a river, and collected rainwater can be discharged to the ground or the river or other discharge positions along the direction of the pier 16 through the main drainage pipe 17 when water can be drained.
According to the long section bridge floor centralized drainage demand of reality, need set up a plurality of groups the utility model discloses a drainage device realizes that longer bridge paragraph concentrates the drainage.
Preferably, inner diameter PVC pipes are pre-buried at the prefabricated small box girder cantilever 5, conditions are reserved for installation of the suspender deformed steel bars 4, the suspender deformed steel bars 4 need to be installed before bridge deck pavement and SS-level guardrail pouring construction, and epoxy mortar is poured between the suspender deformed steel bars 4 and the pre-buried PVC pipes to be tightly filled; the hanger rod deformed steel bar 4 and the hanger bracket angle steel 3 are subjected to hot dip galvanizing treatment before installation, so that the corrosion resistance is improved.
In the utility model, the vertical water drain pipe 1 can collect the rainwater on the bridge floor, one end of the reducing three-way joint is connected through the elbow 2, the longitudinal drain pipe 11 is connected to the opposite two ends respectively in addition, the position of the longitudinal drain pipe 11 is controlled more flexibly by the design of the elbow 2, and then the diameter size of the longitudinal drain pipe is controlled, because the length of the small box girder cantilever 1 is limited, if the elbow is not designed, the prefabricated small box girder 15 can influence the diameter specification of the longitudinal drain pipe 11 and the height of the longitudinal drain pipe 11, the longitudinal drain pipe 11 can not be installed when the diameter specification of the longitudinal drain pipe 11 is large, and the height of the longitudinal drain pipe 11 is difficult to adjust, thus seriously influencing the centralized drainage condition of the long-section bridge floor; the elbow 2 is connected to the reducing tee joint, and the longitudinal drain pipe 11 is communicated through the reducing tee joint, so that long-section drainage can be performed; meanwhile, the angle of the elbow 2 and the angle of the reducing tee joint can control the reverse slope drainage; the hanging hanger type water drainage pipe support structure has the advantages that the threaded steel 4 of the hanging hanger and the hanger angle steel 3 provide support for the longitudinal water drainage pipe 11, meanwhile, the position of the longitudinal water drainage pipe 11 is more conveniently controlled through the arc-shaped steel plate 10 and the round steel pipe clamp 14, the longitudinal water drainage pipe 11 is placed on the arc-shaped steel plate 10, the stress area of the longitudinal water drainage pipe 11 is increased, two strip-shaped through holes and two rectangular notches are formed in the top of the hanger angle steel 3, the position of the longitudinal water drainage pipe 11 is conveniently adjusted, and the linear shape can be conveniently adjusted through transverse movement during installation. The utility model discloses the setting can not be to the bridge top of the direct drainage in ground such as water source protection grounds such as reservoir, river, through setting up the vertical water-drain mast 1 of a plurality of, through vertical drain pipe 11 and three way connection 3 intercommunication between the vertical water-drain mast 1, through fixed vertical drain pipe of fixing device and vertical water-drain mast, can satisfy the drainage of longer paragraph.
The utility model has the advantages that: the hanger frame type centralized drainage device can meet the requirement of centralized drainage of long-section bridge floors, can ensure the reliable fixation of the longitudinal drainage pipes, can freely adjust the height and the transverse position of the longitudinal drainage pipes, realizes the drainage on a reverse slope, and has the advantages of attractive line shape, simplicity and easiness in operation, convenience in installation and the like.
Claims (10)
1. A prefabricated small box girder bridge hanger frame type centralized drainage device comprises a drainage device and a fixing device, wherein the drainage device comprises a vertical drain pipe (1) and a longitudinal drain pipe (11), the longitudinal drain pipe (11) is connected with a main drain pipe (17), and the main drain pipe (17) is connected with the side surface of a bridge abutment or a bridge pier and led to the ground; the drainage device is characterized by further comprising an elbow (2) and a three-way joint (13), wherein the vertical water drain pipe (1) penetrates through a prefabricated small box girder cantilever (5) and a C50 concrete layer (9) on the inner side of the guardrail (6) and an asphalt concrete layer (8), the bottom of the vertical water drain pipe (1) is connected with one end of the three-way joint (13) through the elbow (2), and the other opposite two ends of the three-way joint (13) are respectively connected with a longitudinal drainage pipe (11); the fixing device comprises hanger threaded steels (4), hanger angle steels (3), a round steel pipe clamp (14) and an arc-shaped steel plate (10), wherein the two hanger threaded steels (4) are respectively positioned at symmetrical positions on two sides of a longitudinal drain pipe (11), the tops of the hanger threaded steels (4) are fixedly connected with prefabricated small box girder cantilevers (5), the two symmetrical hanger threaded steels (4) are respectively movably connected with two ends of the hanger angle steels (3), and the hanger angle steels (3) are arranged below the longitudinal drain pipe (11); the top of the hanger angle steel (3) is connected with an arc-shaped steel plate (10) matched with the longitudinal drain pipe (11), the arc-shaped steel plate (10) is positioned between the two symmetrical hanger rod screw-thread steels (4), and the top of the hanger angle steel (3) is provided with two strip-shaped through holes which are respectively positioned at two ends of the arc-shaped steel plate (10); the arc-shaped steel plate (10) is in contact connection with the bottom of the longitudinal drain pipe (11); the round steel pipe clamp (14) surrounds the upper part of the longitudinal drain pipe (11), and two ends of the round steel pipe clamp respectively penetrate through the long-strip through hole to be movably connected with the hanger angle steel (3).
2. The hanging frame type centralized drainage device for the prefabricated small box girder bridges is characterized in that a buffer ring (12) is sleeved at the position where the longitudinal drainage pipe (11) is contacted with the arc-shaped steel plate (10) and the round steel pipe clamp (14).
3. The hanging frame type centralized drainage device for the prefabricated small box girder bridges of claim 2, wherein the buffering ring (12) is connected with the longitudinal drainage pipe (11) by glue.
4. The hanging frame type centralized drainage device for the prefabricated small box girder bridges as claimed in claim 2, wherein the width of the buffer ring (12) is larger than the width of the arc-shaped steel plate (10) and the diameter of the round steel pipe clamp (14).
5. The small box girder bridge hanger type centralized drainage device of claim 1, wherein the elbow (2) is a 90-degree elbow.
6. The hanging bracket type centralized drainage device of the prefabricated small box girder bridge according to claim 1, wherein the threaded steel bars (4) of the hanging rods are respectively positioned at the front and the rear positions close to the longitudinal direction of the vertical drainage pipe (1).
7. The hanging frame type centralized drainage device for the prefabricated small box girder bridge according to claim 1, wherein a rainwater grate (7) is arranged at the top of the vertical drain pipe (1), and the elevation and the slope rate of the top of the rainwater grate (7) are consistent with those of an asphalt concrete layer (8).
8. The hanging bracket type centralized drainage device of the prefabricated small box girder bridge according to claim 1, wherein the two symmetrical hanging bracket screw-thread steels (4) are respectively movably connected with two ends of a hanging bracket angle steel (3) in a way that: two symmetrical hanger rod screw-thread steels (4) pass through rectangular notches formed in two ends of the hanger angle steel (3) and are fixed through nuts.
9. The hanging frame type centralized drainage device for the prefabricated small box girder bridge according to claim 1, wherein the tee joint (13) is a reducing tee joint.
10. The hanging rack type centralized drainage device for the prefabricated small box girder bridges as claimed in claim 1, wherein the top of the vertical drainage pipe (1) is of a funnel structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120267077.0U CN215164623U (en) | 2021-01-29 | 2021-01-29 | Prefabricated small box girder bridge hanger formula centralized drainage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120267077.0U CN215164623U (en) | 2021-01-29 | 2021-01-29 | Prefabricated small box girder bridge hanger formula centralized drainage device |
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| Publication Number | Publication Date |
|---|---|
| CN215164623U true CN215164623U (en) | 2021-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120267077.0U Expired - Fee Related CN215164623U (en) | 2021-01-29 | 2021-01-29 | Prefabricated small box girder bridge hanger formula centralized drainage device |
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| CN (1) | CN215164623U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114541254A (en) * | 2022-03-09 | 2022-05-27 | 中铁大桥勘测设计院集团有限公司 | Secondary drainage system for hybrid composite beam cable-stayed bridge |
-
2021
- 2021-01-29 CN CN202120267077.0U patent/CN215164623U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114541254A (en) * | 2022-03-09 | 2022-05-27 | 中铁大桥勘测设计院集团有限公司 | Secondary drainage system for hybrid composite beam cable-stayed bridge |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 250031 No. 576 Wushanxi Road, Tianqiao District, Jinan City, Shandong Province Patentee after: Shandong transportation planning and Design Institute Group Co.,Ltd. Address before: 250031 No. 576 Wushanxi Road, Tianqiao District, Jinan City, Shandong Province Patentee before: Shandong transportation planning and Design Institute Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211214 |
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| CF01 | Termination of patent right due to non-payment of annual fee |