CN207904917U - Deep layer buried tube type prefabrication type energy pile pile - Google Patents
Deep layer buried tube type prefabrication type energy pile pile Download PDFInfo
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- CN207904917U CN207904917U CN201820206959.4U CN201820206959U CN207904917U CN 207904917 U CN207904917 U CN 207904917U CN 201820206959 U CN201820206959 U CN 201820206959U CN 207904917 U CN207904917 U CN 207904917U
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- pile
- deep layer
- type energy
- heat exchanger
- prefabrication type
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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Abstract
The utility model belongs to building pile foundation and field of energy source developing technology, it is related to a kind of deep layer buried tube type prefabrication type energy pile pile that geothermal clean energy resource utilization rate can be improved, which includes prefabrication type energy pile pile, deep layer drill heat exchange well, heat exchanger tube and backfill material；Prefabrication type energy pile pile and deep layer drill heat exchange well are coaxially disposed from top to bottom；Axial direction inside prefabrication type energy pile pile and inside deep layer drill heat exchange well along prefabrication type energy pile pile is both provided with vertical drilling；Heat exchanger tube is integrally U-shaped；Heat exchanger tube stretches to deep layer drill heat exchange bottom at the top of prefabrication type energy pile pile；Backfill material is filled between heat exchanger tube and vertical drilling.The utility model is reasonable for structure, can save drilling expense and not influence construction of prefabricated piles, is a kind of novel energy prefabricated pile form efficiently, environmentally friendly.
Description
Technical field
The utility model belongs to building pile foundation and field of energy source developing technology, is related to a kind of energy pile pile more particularly to one
The deep layer buried tube type prefabrication type energy pile pile of geothermal clean energy resource utilization rate can be improved in kind.
Background technology
Since 21 century, China has become global first energy-consuming big country, and China's energy resource structure relies primarily on coal etc.
Fossil fuel, flue dust, the CO of coal burning discharge2The problem of environmental pollution Deng caused by receives the whole world and attractes attention.Earth source heat pump system
System has become a kind of principal mode of clean energy resource, earth source heat pump application by advantages such as energy saving, reduction pollutant emissions
It is the core of underground space energy source use engineering, there is special advantage compared with other air-conditioning systems.《National energy " 13
Five " planning》Planning is pointed out, the year two thousand twenty is arrived, and China's geothermal heating system or refrigeration area will have reached 1,600,000,000 square metres, alternative altogether
72,100,000 tons of coal is marked, the earth source heat pump industry as energy conservation and environmental protection industry has welcome new dawn.Traditional pipe-buried geothermal heat
Pump technology is because taking up a large area, and upper space is difficult to be utilized, and the technology is caused to be difficult in the land supplies such as urban district anxiety plot
It promotes and applies.Energy pile technology in building pile foundation by burying heat exchanger tube, realizing carrying building upper load and exchanging shallow-layer for
The dual function of underground heat.Energy pile has many advantages, such as to be not take up additional area, saving part drilling expense.Usual pile foundation stake is long
In 20~30m, and earth source heat pump drilling depth reaches 100m, therefore is difficult in limited stake is long to obtain sufficient heat exchange amount, because
This, buried tube type energy pile heat exchange amount is less in traditional stake.And current energy pile mainly based on bored concrete pile, is incited somebody to action by artificial
Heat exchanger tube binding is fixed on steel reinforcement cage, is influenced on the pile foundation construction of mechanization very big, it is difficult to work continuously.
Utility model content
In order to solve the above technical problems in background technology, the utility model provides a kind of high-efficiency environment friendly, energy
Enough deep layer buried tube type prefabrication type energy pile piles for saving drilling expense and portion's influence construction of prefabricated piles.
To achieve the goals above, the utility model adopts the following technical solution：
A kind of deep layer buried tube type prefabrication type energy pile pile, it is characterised in that：The deep layer buried tube type prefabrication type energy pile pile
Including prefabrication type energy pile pile, deep layer drill heat exchange well, heat exchanger tube and backfill material；The prefabrication type energy pile pile and deep layer
Drilling heat exchange well is coaxially disposed from top to bottom；Along prefabricated inside the prefabrication type energy pile pile inside and deep layer drill heat exchange well
The axial direction of type energy pile pile is both provided with vertical drilling；The heat exchanger tube is integrally U-shaped；The heat exchanger tube is from prefabrication type energy source capsule
Deep layer drill heat exchange bottom is stretched at the top of stake；The backfill material is filled between heat exchanger tube and vertical drilling.
Preferably, prefabrication type energy pile pile used by the utility model includes a section or more piece prefabricated reinforced concrete
Pile pile；The prefabricated reinforced concrete pile pile is coaxially disposed from top to bottom with deep layer drill heat exchange well；The precast reinforced coagulation
When native pile pile is more piece, more piece prefabricated reinforced concrete pile pile is sequentially connected from top to bottom.
Preferably, prefabrication type energy pile pile used by the utility model further includes that setting is precast reinforced mixed in top
The stake top heat exchanger tube protective device for protecting prefabricated reinforced concrete pile pile and heat exchanger tube at the top of solidifying soil pile pile.
Preferably, stake top heat exchanger tube protective device used by the utility model includes pre-formed disk steel member and anchor
Bolt；Anchor bolt through-hole and heat exchange pipe through-hole are provided on the pre-formed disk steel member；The heat exchanger tube passes through heat exchange pipe through-hole
Deep layer drill heat exchange bottom is stretched at the top of prefabrication type energy pile pile afterwards；The anchor bolt is by anchor bolt through-hole by pre-formed disk
Steel member is connected with top prefabricated reinforced concrete pile pile.
Preferably, heat exchanger tube used by the utility model includes water inlet pipe and the outlet pipe that is connected with water inlet pipe；
The water inlet pipe is whole U-shaped after being connected with outlet pipe.
Preferably, heat exchanger tube used by the utility model is single U-shaped, double U tandem types or double U parallel connection types.
Preferably, backfill material used by the utility model is fine sand or bentonite.
Preferably, deep layer buried tube type prefabrication type energy pile pile used by the utility model further includes being arranged in prefabrication type
At the top of energy pile pile and the connection cushion cap steel reinforcement cage that is placed in vertical drilling.
The utility model has the advantages that：
The utility model provides a kind of deep layer buried tube type prefabrication type energy pile pile, the deep layer buried tube type prefabrication type energy source capsule
Stake can solve that buried tube type energy pile heat exchange amount in stake in the prior art is inadequate and traditional earth source heat pump land occupation area
Problem improves overall heat exchange amount and heat exchange efficiency.The utility model is using opened type prefabricated tubular pile inner deep drilling pipe laying
Structure type, be symmetric in heat transfer process because heat exchange generates additional temp load, this be it is a kind of it is relatively better by
Power state.Stake top heat exchanger tube protective device used by the utility model can not only protect the prefabricated tubular pile after section stake
Shield, and can play the role of protecting heat exchanger tube and horizontal inlet heat exchanger tube in stake.Prefabricated tubular pile lower boreholes variable depth, this
Utility model can select different drilling depths to obtain different heat exchange amounts according to user demand.Different from pouring type energy pile
Heat exchanger tube need to be bound when transferring steel reinforcement cage in the construction process, the utility model is tied using prefabrication type energy pile pile as carrying
Structure can greatly be saved and manually put into and ensure pile quality.The utility model discloses the deep layer buried tube type prefabrication type energy
The construction technology of pile pile is smaller in face of former pile foundation construction scheme influence in construction party, and saves the drilling inside prefabricated tubular pile
Expense.Therefore, the utility model has both the advantages of traditional prefabrication type energy pile and earth source heat pump, is a kind of environmentally protective and carries
The good novel energy stake of characteristic, has broad application prospects.The utility model is downward by continuing in prefabricated tubular pile bottom
Drilling, makes pipe laying depth reach 100m, can effectively improve its heat exchange efficiency and heat exchange amount.Prefabricated pile has rapid construction,
The advantages that structure type is fixed considers that buried heat exchanger tube does not influence pile foundation construction in prefabricated tubular pile, and structure type is reasonable, has
Wide application prospect.
Description of the drawings
Fig. 1 a are the overall schematic of deep layer buried tube type prefabrication type energy pile pile provided by the utility model；
Fig. 1 b are the cross-sectional view of deep layer buried tube type prefabrication type energy pile pile provided by the utility model；
Fig. 2 is the structural schematic diagram of connection cushion cap steel reinforcement cage used by the utility model；
Fig. 3 is the positive structure diagram of stake top heat exchanger tube protective device used by the utility model；
Fig. 4 is the overlooking structure diagram of stake top heat exchanger tube protective device used by the utility model；
The reference numerals are as follows：
1- connection cushion cap steel reinforcement cages；2- anchor bolts；3- stake top heat exchanger tube protective devices；4- prefabrication type energy pile piles；5- is prefabricated
Reinforced concrete pipe pile；6- heat exchanger tubes；7- deep layer drill heat exchange wells；8- backfill material.
Specific implementation mode
The utility model provides a kind of good novel energy stake of environmentally protective and bearer properties, efficiently uses prefabrication type
The reasonable combination of energy pile pile and deep layer drill heat exchange well greatly improves the heat exchange amount and heat exchange efficiency of energy pile, has good
Good stress performance, has good market prospects and promotional value.
Referring to Fig. 1 a and Fig. 1 b, the utility model provides a kind of deep layer buried tube type prefabrication type energy pile pile, the deep layer
Buried tube type prefabrication type energy pile pile includes prefabrication type energy pile pile 4, deep layer drill heat exchange well 7, heat exchanger tube 6 and backfill material 8；In advance
Type energy pile pile 4 and deep layer drill heat exchange well 7 processed are coaxially disposed from top to bottom；4 inside of prefabrication type energy pile pile and deep layer
Axial direction inside drilling heat exchange well 7 along prefabrication type energy pile pile 4 is both provided with vertical drilling；Heat exchanger tube 6 is whole U-shaped；Heat exchange
Pipe 6 stretches to 7 bottom of deep layer drill heat exchange well from the top of prefabrication type energy pile pile 4；Backfill material 8 be filled in heat exchanger tube 6 with it is vertical
Between drilling.Prefabrication type energy pile pile 4 is more parallel settings on deep layer drill heat exchange well 7；Contiguous prefabricated type energy pile pile 4
The distance between be not less than 4 meters, prevent in vertical drilling to neighboring vertical drilling have interference.
Prefabrication type energy pile pile 4 includes a section or more piece prefabricated reinforced concrete pile pile 5；Prefabricated reinforced concrete pile pile 5
It is coaxially disposed from top to bottom with deep layer drill heat exchange well 7；When prefabricated reinforced concrete pile pile 5 is more piece, more piece is precast reinforced mixed
Solidifying soil pile pile 5 is sequentially connected from top to bottom, and the pile crown of prefabricated reinforced concrete pile pile 5 is opened type.
Prefabrication type energy pile pile 4 further includes being arranged in the pre- for protecting of 5 top of top prefabricated reinforced concrete pile pile
The stake top heat exchanger tube protective device 3 of reinforced concrete pipe pile 5 and heat exchanger tube 6 processed.Referring to Fig. 3 and Fig. 4, the utility model institute
The stake top heat exchanger tube protective device 3 of use includes pre-formed disk steel member and anchor bolt 2；It is provided with anchor on pre-formed disk steel member
Bolt throughhole and heat exchange pipe through-hole；Pre-formed disk steel member is embedded in prefabrication type energy pile pile 4 by bottom overhanging end and is fixed
And protect pile crown；Heat exchanger tube 6 stretches to deep layer drill heat exchange well 7 after heat exchange pipe through-hole from the top of prefabrication type energy pile pile 4
Bottom；Pre-formed disk steel member is connected by anchor bolt 2 by anchor bolt through-hole with top prefabricated reinforced concrete pile pile 5.
Heat exchanger tube 6 includes water inlet pipe and the outlet pipe being connected with water inlet pipe；It is in U that water inlet pipe is whole after being connected with outlet pipe
Type, heat exchanger tube 6 are single U-shaped, double U tandem types or double U parallel connection types.
Backfill material 8 is fine sand or bentonite.
Fig. 2 is participated in, deep layer buried tube type prefabrication type energy pile pile provided by the utility model further includes being arranged in prefabrication type
The connection cushion cap steel reinforcement cage 1 energy pile pile 4 top and be placed in vertical drilling.It connects cushion cap steel reinforcement cage 1 and is free of backing board, this reality
It is obstructed without backing board come closely knit pile pile internal voids with backfill backfill material 8 is taken inside novel provided prefabricated tubular pile
Wadding weft variation is exposed to pile pile hollow space.
Deep layer buried tube type prefabrication type energy pile pile provided by the utility model includes the following steps in Specific construction：
1) sinking apparatus is used, by prefabricated reinforced concrete pile pile 5 by design scheme in designated position pile sinking；It is precast reinforced
When concrete tubular pile 5 is more piece, the stake bottom of two adjacent sections prefabricated reinforced concrete pile pile 5 and stake top by ring flange connection method,
Welding and/or slurry anchor method carry out head and the tail pile extension；
2) pile follower depth is calculated according to design requirement, stops pile follower after pile follower to designed elevation；When pile follower to design mark
When stopping pile follower after height, if prefabricated reinforced concrete pile pile 5 leaks outside, length is more than design value, is more than mark using cutting equipment cutting
High part pile pile exposes pile crown；
3) stake top heat exchanger tube protective device 3 is embedded in and is fixed in prefabricated reinforced concrete pile pile using 4 anchor bolts 2
5 pile crown；
4) drilling machine is set up, from the fixing device lowered inside casing and drilling rod of 5 pile crown of prefabricated reinforced concrete pile pile, downwards
Vertical drilling；When the depth of vertical drilling is not less than 100 meters, drilling rod and casing are extracted；
5) heat exchanger tube 6 is transferred in vertical drilling until 6 bottom end of heat exchanger tube arrival vertical drilling bottom, blocks heat exchanger tube 6
The exposed redundance in top simultaneously carries out seal protection；
6) using the gap between 8 backfill heat exchanger tube 6 of backfill material and vertical drilling, in prefabricated reinforced concrete pile pile 5
The reserved deep gouge no more than 1m in top；
7) the decentralization connection cushion cap steel reinforcement cage 1 in deep gouge, the bottom end of connection cushion cap steel reinforcement cage 1 is inserted back into filler 8, top
The stake top of prefabricated reinforced concrete pile pile 5 is fixed on by transverse steel；
8) use elbow by 6 welding of heat exchanger tube in horizontal heat exchange tube and vertical drilling, then horizontal heat exchange pipe port is close
Envelope protection is laid with 5~10cm sand bedding courses in horizontal heat exchange bottom of the tube and is protected；
9) according to the design requirement of 5 top structure of prefabricated reinforced concrete pile pile to 5 top of prefabricated reinforced concrete pile pile
Pour foundation platform or foundation beam；
10) horizontal heat exchange tube is connected with the condensate correcting-distribuing device of heat-exchange system.
The structure of the utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings：
Embodiment：
The long 28m of deep layer buried tube type prefabrication type energy pile pile top stake, lower part deep layer drill well depth reach 100m.It selects prefabricated
Pile pile specification：Outer diameter 400mm, wall thickness 95mm, single-unit stake long 10m, concrete strength of pile C80.Corresponding stake top heat exchange protection dress
Set specification：Outer diameter 400mm, internal diameter 200mm, height 60mm are embedded in depth 80mm in stake.Connect cushion cap round bar cage specification：It is main
6, muscleStirrupSpacing 200mm.
Implementation steps are as follows：
1) static pile press is used, by prefabricated reinforced concrete pile pile by design scheme in designated position pile sinking, using weldering
It connects and the stake bottom of 3 section prefabricated reinforced concrete pile piles is subjected to pile extension with stake top.
2) pile follower depth 28m is reached according to design requirement, stops pile follower.By pile pile pile cutting machine by design absolute altitude,
Expose pile crown, clears up the laitance and sundries of pile pile inner wall.
3) consistency of stake top heat exchanger tube protective device size and prefabricated tubular pile is checked, stake top heat exchanger tube protective device is embedding
Enter pile crown, and pile crown is fixed in using 4 anchor bolts.
4) drilling machine is set up, bit diameter selectes 140mm, deep layer drill well diameter 150mm.The subordinate out of pile crown fixing device
Casing and drilling rod are put, is drilled downward vertically.Extraction drilling rod and casing hole to be drilled after being drilled into 100m depths.
5) type of attachment of heat exchanger tube is double U parallel connection types, prepares 4 according to the unilateral long 110m of heat exchanger tube, by 4 heat exchanger tubes
Bottom end be fused into respectively two it is U-shaped.By connect two U heat exchanges, interior water-filling, and the plus-pressure table on gas port are managed, is made
With not less than 12Kgf/cm2Pressure pressure testing, it is ensured that pipeline is excellent.Heat exchanger tube is transferred, heat exchanger tube bottom end reaches foot of hole,
It blocks the exposed redundance in top and carries out seal protection.
6) using backfill material backfill deep layer drill heat exchange well and top prefabricated tubular pile internal pore part, the top of pile pile is reserved
1m deep space gaps.
7) decentralization connection cushion cap steel reinforcement cage, steel reinforcement cage bottom end are inserted back into filler, and stake is fixed in top by transverse steel
Top.
8) use elbow by heat exchanger tube welding in horizontal direction inlet and outlet heat exchanger tube and stake, then by horizontal inlet and outlet heat exchanger tube
Port sealing is protected, and then checks again for air-tightness, and be laid with 5~10cm sand bedding courses in horizontal heat exchange bottom of the tube and protected.
9) pile pile top inner wall must be cleaned out, and brush inorganic agent, it is ensured that wadding weft variation and tubular pile body concrete
Globality.Foundation platform or foundation beam are poured according to the design requirement of superstructure, wadding weft variation is first poured marked as C30
Build wadding weft variation.
10) inlet and outlet heat exchanger tube is connected with the condensate correcting-distribuing device of heat-exchange system.
Claims (8)
1. a kind of deep layer buried tube type prefabrication type energy pile pile, it is characterised in that：The deep layer buried tube type prefabrication type energy pile pile packet
Include prefabrication type energy pile pile（4）, deep layer drill heat exchange well（7）, heat exchanger tube（6）And backfill material（8）；The prefabrication type energy source capsule
Stake（4）And deep layer drill heat exchange well（7）It is coaxially disposed from top to bottom；The prefabrication type energy pile pile（4）Internal and deep layer
Drill heat exchange well（7）Inside is along prefabrication type energy pile pile（4）Axial direction be both provided with vertical drilling；The heat exchanger tube（6）It is whole
It is U-shaped；The heat exchanger tube（6）From prefabrication type energy pile pile（4）Top stretch to deep layer drill heat exchange well（7）Bottom；Described time
Filler（8）It is filled in heat exchanger tube（6）Between vertical drilling.
2. deep layer buried tube type prefabrication type energy pile pile according to claim 1, it is characterised in that：The prefabrication type energy source capsule
Stake（4）Including a section or more piece prefabricated reinforced concrete pile pile（5）；The prefabricated reinforced concrete pile pile（5）With deep layer drill
Heat exchange well（7）It is coaxially disposed from top to bottom；The prefabricated reinforced concrete pile pile（5）When being more piece, the precast reinforced coagulation of more piece
Native pile pile（5）It is sequentially connected from top to bottom.
3. deep layer buried tube type prefabrication type energy pile pile according to claim 2, it is characterised in that：The prefabrication type energy source capsule
Stake（4）Further include being arranged in top prefabricated reinforced concrete pile pile（5）Top is used to protect prefabricated reinforced concrete pile pile
（5）And heat exchanger tube（6）Stake top heat exchanger tube protective device（3）.
4. deep layer buried tube type prefabrication type energy pile pile according to claim 3, it is characterised in that：The stake top heat exchanger tube is protected
Protection unit（3）Including pre-formed disk steel member and anchor bolt（2）；Be provided on the pre-formed disk steel member anchor bolt through-hole and
Exchange heat pipe through-hole；The heat exchanger tube（6）From prefabrication type energy pile pile after heat exchange pipe through-hole（4）Top stretch to deep layer drill
Heat exchange well（7）Bottom；The anchor bolt（2）By anchor bolt through-hole by pre-formed disk steel member and top prefabricated reinforced concrete pipe
Stake（5）It is connected.
5. deep layer buried tube type prefabrication type energy pile pile according to claim 1 or 2 or 3 or 4, it is characterised in that：It is described to change
Heat pipe（6）The outlet pipe being connected including water inlet pipe and with water inlet pipe；The water inlet pipe is whole U-shaped after being connected with outlet pipe.
6. deep layer buried tube type prefabrication type energy pile pile according to claim 5, it is characterised in that：The heat exchanger tube（6）It is
Single U-shaped, double U tandem types or double U parallel connection types.
7. deep layer buried tube type prefabrication type energy pile pile according to claim 6, it is characterised in that：The backfill material（8）It is
Fine sand or bentonite.
8. deep layer buried tube type prefabrication type energy pile pile according to claim 7, it is characterised in that：The deep layer buried tube type is pre-
Type energy pile pile processed further includes being arranged in prefabrication type energy pile pile（4）Top and the connection cushion cap steel reinforcement cage being placed in vertical drilling
（1）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820206959.4U CN207904917U (en) | 2018-02-06 | 2018-02-06 | Deep layer buried tube type prefabrication type energy pile pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820206959.4U CN207904917U (en) | 2018-02-06 | 2018-02-06 | Deep layer buried tube type prefabrication type energy pile pile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207904917U true CN207904917U (en) | 2018-09-25 |
Family
ID=63563404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820206959.4U Expired - Fee Related CN207904917U (en) | 2018-02-06 | 2018-02-06 | Deep layer buried tube type prefabrication type energy pile pile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207904917U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108166486A (en) * | 2018-02-06 | 2018-06-15 | 湖北工业大学 | Deep layer buried tube type prefabrication type energy pile pile and its construction technology |
| CN110118445A (en) * | 2019-04-18 | 2019-08-13 | 东南大学 | A kind of semi open model forced convection heat transfer energy pile tubular pole system |
| CN114076418A (en) * | 2021-10-27 | 2022-02-22 | 中交第二公路勘察设计研究院有限公司 | Heat exchange system based on deep buried pipe energy support pile and construction process |
-
2018
- 2018-02-06 CN CN201820206959.4U patent/CN207904917U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108166486A (en) * | 2018-02-06 | 2018-06-15 | 湖北工业大学 | Deep layer buried tube type prefabrication type energy pile pile and its construction technology |
| CN108166486B (en) * | 2018-02-06 | 2024-02-02 | 湖北工业大学 | Deep buried pipe type prefabricated energy pipe pile and construction process thereof |
| CN110118445A (en) * | 2019-04-18 | 2019-08-13 | 东南大学 | A kind of semi open model forced convection heat transfer energy pile tubular pole system |
| CN114076418A (en) * | 2021-10-27 | 2022-02-22 | 中交第二公路勘察设计研究院有限公司 | Heat exchange system based on deep buried pipe energy support pile and construction process |
| CN114076418B (en) * | 2021-10-27 | 2024-04-23 | 中交第二公路勘察设计研究院有限公司 | Heat exchange system based on deep buried pipe energy support pile and construction process |
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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 |