CN215213786U - Heat storage and exchange integrated power generation device for solar power generation system - Google Patents
Heat storage and exchange integrated power generation device for solar power generation system Download PDFInfo
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- CN215213786U CN215213786U CN202121362286.XU CN202121362286U CN215213786U CN 215213786 U CN215213786 U CN 215213786U CN 202121362286 U CN202121362286 U CN 202121362286U CN 215213786 U CN215213786 U CN 215213786U
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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
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines
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Abstract
The utility model provides a solar electric system is with heat accumulation heat transfer integration power generation facility. The heat storage and exchange integrated power generation device for the solar power generation system comprises: the base is provided with a driving device, and the driving device is connected with a supporting plate; the cleaning device is characterized in that a cleaning mechanism is arranged on the supporting plate and comprises two L-shaped blocks, a threaded rod, a driving motor, an L-shaped sliding block, an installation plate, a first sponge cleaning body, a second sponge cleaning body, a spray head, a water tank, a water pump, a drain pipe and a hose, wherein the two L-shaped blocks are fixedly installed on the outer walls of the two sides of the supporting plate respectively. The utility model provides a solar power system is with heat accumulation heat transfer integration power generation facility can regularly come to clean the heliostat, avoids appearing influencing the reflectivity of mirror surface because of the dust to lead to the fact the advantage of influence to the heat sink.
Description
Technical Field
The utility model belongs to the technical field of solar energy power generation, especially, relate to a solar power system is with heat accumulation heat transfer integration power generation facility.
Background
The solar energy heat-collecting power generation technology has been developed for over thirty years, is different from solar photovoltaic power generation and direct photothermal power generation by utilizing a Stirling generator, is an important research direction for solar energy utilization, has profound significance for solving the problems of fossil energy crisis, air pollution and the like of human beings, and has various technical directions: according to different focusing modes, the focusing mode can be divided into a disc mode, a groove mode, a tower mode and the like; the adopted working media comprise water (steam), fused salt, air, heat conduction oil, liquid metal, other heat conduction media and the like.
In the prior art, a tower type solar power generation system integrating heat storage and heat exchange is disclosed, wherein a first cut-off valve is arranged between a saturated water heat absorber and a water heat accumulator, a second cut-off valve is arranged between the water heat accumulator and an overheating heat absorber, a third cut-off valve is arranged between the overheating heat absorber and a heat storage/heat exchanger, and a fourth cut-off valve is also arranged between the water heat accumulator and the heat storage/heat exchanger; under the state of sufficient sunlight, the first cut-off valve, the second cut-off valve and the third cut-off valve are opened, the fourth cut-off valve is closed, and the heat storage/heat exchanger buffers and stores heat for the superheated steam; and in the state of insufficient sunlight, the first cut-off valve, the second cut-off valve and the third cut-off valve are closed, the fourth cut-off valve is opened, and the heat storage/heat exchanger exchanges heat with the saturated steam to form superheated steam.
Above-mentioned structure especially heliostat lacks clean function in the use, because the function that the heliostat realized is on gathering the heat absorber with the sunlight, and the cleanliness of heliostat mirror surface will influence the reflectivity of mirror surface, and then influences the incident energy of heat absorber, consequently, the higher cleanliness of heliostat mirror surface maintenance will improve light and heat conversion efficiency, so, will regularly clean the heliostat.
Therefore, there is a need to provide a new heat storage and exchange integrated power generation device for a solar power generation system to solve the above technical problems.
Disclosure of Invention
The utility model provides a technical problem provide a can regularly come to clean the heliostat, avoid appearing influencing the reflectivity of mirror surface because of the dust to cause the heat accumulation heat transfer integration power generation facility for the solar electric system of influence to the heat absorber.
The purpose of the utility model is realized like this:
a heat storage and exchange integrated power generation device for a solar power generation system comprises:
the base is provided with a driving device, and the driving device is connected with a supporting plate;
the cleaning device is characterized in that a cleaning mechanism is arranged on the supporting plate, two L-shaped blocks are fixedly arranged on the outer walls of the two sides of the supporting plate respectively, a threaded rod is arranged on the two L-shaped blocks, one end of the threaded rod extends out of one side of the L-shaped block, a driving motor is arranged on the L-shaped blocks, an output shaft of the driving motor is connected with one end of the corresponding threaded rod, the L-shaped sliding block is connected onto the threaded rod through threads, a mounting plate is fixed onto the L-shaped sliding block, a first sponge cleaning body is fixed onto one side of the mounting plate, a second sponge cleaning body is arranged on one side of the mounting plate, a spray head is arranged on one side of the mounting plate and positioned between the second sponge cleaning body and the first sponge cleaning body, a water pump is fixedly arranged at the bottom of the water tank, a water drainage pipe is connected onto a water drainage port of the water pump, the top end of the water drainage pipe extends to the upper part of the water tank, and a hose is arranged at the top end of the water drainage pipe, and one end of the hose, which is far away from the drain pipe, is fixedly connected with the spray head.
The heat storage and heat exchange integrated power generation device for the solar power generation system is characterized in that a reminding assembly is arranged on the water tank, the reminding assembly comprises a controller, a water level sensor and a wireless signal transmitter, the controller is fixedly installed on the outer wall of one side of the water tank, the water level sensor is arranged in the water tank, the wireless signal transmitter is arranged at the bottom of the controller, and the controller is respectively and electrically connected with the water level sensor and the wireless signal transmitter; the water tank is internally provided with a filter assembly, the filter assembly comprises a filter vat, two L-shaped mounting blocks, a quartz stone filter plate, two limit blocks, an activated carbon adsorption plate and filter plate cloth, the filter vat is fixedly mounted on the inner wall of one side of the water tank, the two L-shaped mounting blocks are respectively and fixedly mounted on the inner walls of the two sides of the filter vat, the quartz stone filter plate is arranged at the top of the two L-shaped mounting blocks, the two limit blocks are respectively arranged on the two L-shaped mounting blocks, the top of the limit blocks is fixedly connected with the bottom of the quartz stone filter plate, the activated carbon adsorption plate is fixedly mounted at the bottom of the quartz stone filter plate, the filter plate cloth is fixedly mounted at the bottom of the activated carbon adsorption plate, and the activated carbon adsorption plate and the filter plate cloth are respectively matched with the two L-shaped mounting blocks.
The heat storage and heat exchange integrated power generation device for the solar power generation system is characterized in that two L-shaped mounting blocks are respectively provided with a limiting assembly, each limiting assembly comprises an elastic spring and a limiting slide block, one outer wall of each L-shaped mounting block is provided with a groove, the elastic springs are fixedly mounted in the grooves, the limiting slide blocks are fixedly mounted on the elastic springs, one outer wall of each limiting slide block is fixedly provided with a limiting elastic ball, one outer wall of each limiting slide block is provided with an arc-shaped groove, the limiting elastic balls are matched with the arc-shaped grooves, the outer walls of two sides of each limiting slide block are fixedly provided with limiting slide bars, the inner walls of two sides of each groove are provided with slide grooves, and the ends, away from each other, of the two limiting slide bars respectively extend into the corresponding two slide grooves and are in sliding connection with the inner walls of the two slide grooves; the outer wall of one side of the supporting plate is fixedly provided with two supporting rods, the heliostat is fixedly arranged on the two supporting rods, and the first sponge cleaning body, the spray head and the second sponge cleaning body are respectively matched with the heliostat.
The heat storage and exchange integrated power generation device for the solar power generation system is characterized in that a limiting round rod is fixedly arranged on the two L-shaped blocks and is connected with the L-shaped sliding blocks in a sliding manner; fixed mounting has the collecting box on the base, the top fixed mounting of collecting box has the funnel, the bottom fixed mounting of collecting box has the connecting pipe, the connecting pipe runs through the water tank and extends to in the filter vat, the top of water tank articulates there is the apron, the top fixed mounting of quartz filter has the handle, the top of handle extends to the top of filter vat.
Has the advantages that:
1. the utility model has the advantages that the cleaning mechanism is arranged, so that the heliostat can be cleaned regularly, the influence on the reflectivity of the mirror surface due to dust is avoided, and the influence on the heat absorber is avoided;
2. the utility model discloses a set up and remind the subassembly for when lacking water in the water tank, can remind the staff to carry out the water injection in the very first time, avoid causing the influence to cleaning work;
3. the utility model realizes the functions of water circulation, filtration and disassembly by arranging the filter assembly, the limit assembly, the collecting box, the funnel and the connecting pipe to be matched with each other, so that the filter equipment can be replaced regularly, and the waste of water resources can be avoided;
4. the limiting block can be limited and fixed through the limiting assembly, so that the quartz stone filter plate can be conveniently replaced;
5. under mutually supporting through collecting box, funnel and connecting pipe for can form hydrologic cycle's system, avoid appearing water waste's advantage.
The utility model provides a solar power system is with heat accumulation heat transfer integration power generation facility's theory of operation as follows:
the controller is respectively electrically connected with the water pump 13 and the driving motor 6, and cleaning work is started every Monday by setting the controller;
the first step is as follows: when a week is reached and the heliostat 26 needs to be cleaned, the controller starts the driving motor 6 to operate, so that the output shaft of the driving motor 6 drives the threaded rod 5 to move, under the action of the limiting round rod, the L-shaped sliding block 7 sequentially drives the mounting plate 8, the first sponge cleaning body 9, the second sponge cleaning body 10 and the spray head 11 to move, when the first sponge cleaning body 9 is connected with the heliostat 26, the effect of wiping dust is achieved, meanwhile, the controller starts the water pump 13 to operate, so that water in the water tank 12 is pumped out and is discharged through the drain pipe 14, the hose 15 and the spray head 11, so that the heliostat 26 is washed, when the second sponge cleaning body 10 is contacted with the heliostat 26, the effect of secondary cleaning is achieved, and residual water and dust on the surface of the heliostat 26 can be cleaned for the second time;
the second step is as follows: when the water level in the water tank 12 is lower than the water level sensor 150, the controller receives the signal and transmits a water shortage signal by starting the wireless signal transmitter 16, so that the controller can remind a worker to add water to keep the normal operation of cleaning work, meanwhile, the cleaned water drops into the collection tank and is discharged into the filter barrel 17 through the connecting pipe, the water is filtered through the quartz stone filter plate 19, the activated carbon adsorption plate 21 and the filter plate cloth 22, and the filtered water returns to the water tank 12 again, so that the purpose of water circulation can be achieved, and the waste of water resources is reduced;
the third step: when needing to be changed filtration equipment, open the apron, remove with hand pulling handle, make the handle drive quartz filter 19 and remove, drive active carbon adsorption board 21 and filter plate cloth 22 through quartz filter 19 and remove, and at the removal in-process, stopper 20 can extrude spacing elastic ball, make spacing elastic ball extrude spacing slider 24 and remove, under spacing slide bar's effect, make spacing slider 24 extrude elastic spring 23, make spacing elastic ball break away from the arc wall, take out the filtration equipment and change.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic view of the structure of the present invention;
FIG. 2 is an enlarged schematic view of portion A of FIG. 1;
FIG. 3 is an enlarged schematic view of portion B of FIG. 1;
FIG. 4 is an enlarged schematic view of a portion C of FIG. 1;
fig. 5 is an enlarged schematic view of a portion D in fig. 4.
In the figure: 1. a base; 2. a drive device; 3. a support plate; 4. an L-shaped block; 5. a threaded rod; 6. a drive motor; 7. an L-shaped sliding block; 8. mounting a plate; 9. a first sponge cleaning body; 10. a second sponge cleaning body; 11. a spray head; 12. a water tank; 13. a water pump; 14. a drain pipe; 15. a hose; 150. a water level sensor; 16. a wireless signal transmitter; 17. a filter vat; 18. an L-shaped mounting block; 19. a quartz stone filter plate; 20. a limiting block; 21. an activated carbon adsorption plate; 22. filtering plate cloth; 23. an elastic spring; 24. a limiting slide block; 25. a support bar; 26. a heliostat.
The specific implementation mode is as follows:
example 1:
referring to fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5,
the heat storage and exchange integrated power generation device for the solar power generation system comprises: the device comprises a base 1, wherein a driving device 2 is arranged on the base 1, and a supporting plate 3 is connected to the driving device 2; the cleaning device is characterized in that a cleaning mechanism is arranged on the supporting plate 3 and comprises two L-shaped blocks 4, a threaded rod 5, a driving motor 6, an L-shaped sliding block 7, a mounting plate 8, a first sponge cleaning body 9, a second sponge cleaning body 10, a spray head 11, a water tank 12, a water pump 13, a drain pipe 14 and a hose 15, the two L-shaped blocks 4 are respectively and fixedly mounted on the outer walls of two sides of the supporting plate 3, the threaded rod 5 is rotatably mounted on the two L-shaped blocks 4, one end of the threaded rod 5 extends out of one side of the L-shaped block 4, the driving motor 6 is fixedly mounted on the L-shaped block 4, an output shaft of the driving motor 6 is fixedly connected with one end of the corresponding threaded rod 5, the L-shaped sliding block 7 is mounted on the threaded rod 5 in a threaded manner, the mounting plate 8 is fixedly mounted on the L-shaped sliding block 7, the first sponge cleaning body 9 is fixedly mounted on the outer wall of one side of the mounting plate 8, the second sponge cleaning body 10 is fixedly installed on the outer wall of one side of the installation plate 8, the second sponge cleaning body 10 is located on one side of the first sponge cleaning body 9, the spray head 11 is arranged on one side of the installation plate 8, the spray head 11 is located between the second sponge cleaning body 10 and the first sponge cleaning body 9, the water tank 12 is arranged on one side of the base 1, the water pump 13 is fixedly installed on the inner wall of the bottom of the water tank 12, the drain pipe 14 is fixedly installed on a water outlet of the water pump 13, the top end of the drain pipe 14 extends to the upper portion of the water tank 12, the hose 15 is fixedly installed on the top end of the drain pipe 14, and one end, far away from the drain pipe 14, of the hose 15 is fixedly connected with the spray head 11.
Example 2:
the heat storage and heat exchange integrated power generation device for the solar power generation system in embodiment 1 is, as shown in fig. 1, provided with a reminding assembly on the water tank 12, where the reminding assembly includes a controller, a water level sensor 150 and a wireless signal transmitter 16, the controller is fixedly mounted on an outer wall of one side of the water tank 12, the water level sensor 150 is disposed in the water tank 12, the wireless signal transmitter 16 is disposed at the bottom of the controller, and the controller is electrically connected to the water level sensor 150 and the wireless signal transmitter 16, respectively;
through setting up the warning subassembly for when lacking water in the water tank 12, can remind the staff to carry out the water injection the very first time, avoid causing the influence to cleaning.
As shown in fig. 4, a filter assembly is arranged in the water tank 12, the filter assembly comprises a filter barrel 17, two L-shaped mounting blocks 18, a quartz stone filter plate 19, two limiting blocks 20, an activated carbon adsorption plate 21 and a filter plate cloth 22, the filtering barrel 17 is fixedly arranged on the inner wall of one side of the water tank 12, the two L-shaped mounting blocks 18 are respectively and fixedly arranged on the inner walls of two sides of the filtering barrel 17, the quartz stone filter plate 19 is arranged on the top of the two L-shaped mounting blocks 18, the two limiting blocks 20 are respectively arranged on the two L-shaped mounting blocks 18, the top of the limiting block 20 is fixedly connected with the bottom of the quartz stone filter plate 19, the active carbon adsorption plate 21 is fixedly arranged at the bottom of the quartz stone filter plate 19, the filter plate cloth 22 is fixedly arranged at the bottom of the activated carbon adsorption plate 21, and the activated carbon adsorption plate 21 and the filter plate cloth 22 are respectively matched with the two L-shaped mounting blocks 18;
through setting up filtering component for can filter the circulating water, avoid having rubble or debris to enter into water tank 12 in, and lead to the fact the advantage of damage to water pump 13.
Example 3:
the heat storage and exchange integrated power generation device for a solar power generation system described in embodiment 1 or 2:
as shown in fig. 5, two L-shaped mounting blocks 18 are respectively provided with a limiting assembly, the limiting assembly comprises an elastic spring 23 and a limiting slider 24, one outer wall of one side of each L-shaped mounting block 18 is provided with a groove, the elastic spring 23 is fixedly mounted in the groove, the limiting slider 24 is fixedly mounted on the elastic spring 23, one outer wall of one side of the limiting slider 24 is fixedly provided with a limiting elastic ball, one outer wall of one side of each limiting block 20 is provided with an arc-shaped groove, and the limiting elastic balls are matched with the arc-shaped grooves;
through spacing subassembly for can carry out spacing fixed to stopper 20, be convenient for change quartz filter 19.
As shown in fig. 5, the outer walls of the two sides of the limiting slide block 24 are fixedly provided with limiting slide bars, the inner walls of the two sides of the groove are provided with sliding grooves, and the ends of the two limiting slide bars, which are far away from each other, extend into the corresponding two sliding grooves respectively and are connected with the inner walls of the two sliding grooves in a sliding manner.
As shown in fig. 1, two support rods 25 are fixedly installed on the outer wall of one side of the support plate 3, the heliostat 26 is fixedly installed on the two support rods 25, and the first sponge cleaning body 9, the nozzle 11 and the second sponge cleaning body 10 are respectively adapted to the heliostat 26.
Example 4:
the heat storage and exchange integrated power generation device for a solar power generation system according to embodiment 1, 2, or 3:
as shown in fig. 2, two L-shaped blocks 4 are fixedly provided with a limiting round bar, and the limiting round bar is connected with an L-shaped sliding block 7 in a sliding manner.
As shown in fig. 1, a collecting box is fixedly mounted on the base 1, a funnel is fixedly mounted at the top of the collecting box, a connecting pipe is fixedly mounted at the bottom of the collecting box, the connecting pipe penetrates through the water tank 12 and extends into the filter vat 17, a cover plate is hinged at the top of the water tank 12, a handle is fixedly mounted at the top of the quartz stone filter plate 19, and the top end of the handle extends to the upper part of the filter vat 17;
under mutually supporting through collecting box, funnel and connecting pipe for can form hydrologic cycle's system, avoid appearing water waste's advantage.
Claims (4)
1. The utility model provides a solar electric system is with heat accumulation heat transfer integration power generation facility which characterized in that includes:
the base is provided with a driving device, and the driving device is connected with a supporting plate;
the cleaning device is characterized in that a cleaning mechanism is arranged on the supporting plate, two L-shaped blocks are fixedly arranged on the outer walls of the two sides of the supporting plate respectively, a threaded rod is arranged on the two L-shaped blocks, one end of the threaded rod extends out of one side of the L-shaped block, a driving motor is arranged on the L-shaped blocks, an output shaft of the driving motor is connected with one end of the corresponding threaded rod, the L-shaped sliding block is connected onto the threaded rod through threads, a mounting plate is fixed onto the L-shaped sliding block, a first sponge cleaning body is fixed onto one side of the mounting plate, a second sponge cleaning body is arranged on one side of the mounting plate, a spray head is arranged on one side of the mounting plate and positioned between the second sponge cleaning body and the first sponge cleaning body, a water pump is fixedly arranged at the bottom of the water tank, a water drainage pipe is connected onto a water drainage port of the water pump, the top end of the water drainage pipe extends to the upper part of the water tank, and a hose is arranged at the top end of the water drainage pipe, and one end of the hose, which is far away from the drain pipe, is fixedly connected with the spray head.
2. The heat storage and heat exchange integrated power generation device for the solar power generation system as claimed in claim 1, characterized in that: the water tank is provided with a reminding assembly, the reminding assembly comprises a controller, a water level sensor and a wireless signal transmitter, the controller is fixedly arranged on the outer wall of one side of the water tank, the water level sensor is arranged in the water tank, the wireless signal transmitter is arranged at the bottom of the controller, and the controller is electrically connected with the water level sensor and the wireless signal transmitter respectively; the water tank is internally provided with a filter assembly, the filter assembly comprises a filter vat, two L-shaped mounting blocks, a quartz stone filter plate, two limit blocks, an activated carbon adsorption plate and filter plate cloth, the filter vat is fixedly mounted on the inner wall of one side of the water tank, the two L-shaped mounting blocks are respectively and fixedly mounted on the inner walls of the two sides of the filter vat, the quartz stone filter plate is arranged at the top of the two L-shaped mounting blocks, the two limit blocks are respectively arranged on the two L-shaped mounting blocks, the top of the limit blocks is fixedly connected with the bottom of the quartz stone filter plate, the activated carbon adsorption plate is fixedly mounted at the bottom of the quartz stone filter plate, the filter plate cloth is fixedly mounted at the bottom of the activated carbon adsorption plate, and the activated carbon adsorption plate and the filter plate cloth are respectively matched with the two L-shaped mounting blocks.
3. The heat storage and heat exchange integrated power generation device for the solar power generation system as claimed in claim 2, characterized in that: the two L-shaped mounting blocks are respectively provided with a limiting assembly, the limiting assembly comprises an elastic spring and a limiting sliding block, one outer wall of one side of each L-shaped mounting block is provided with a groove, the elastic spring is fixedly mounted in the groove, the limiting sliding block is fixedly mounted on the elastic spring, one outer wall of one side of the limiting sliding block is fixedly mounted with a limiting elastic ball, one outer wall of one side of the limiting block is provided with an arc-shaped groove, the limiting elastic ball is matched with the arc-shaped groove, two outer walls of two sides of the limiting sliding block are respectively fixedly mounted with a limiting sliding rod, two inner walls of two sides of the groove are respectively provided with a sliding groove, and one end of each limiting sliding rod, which is far away from each other, extends into the corresponding two sliding grooves and is in sliding connection with the inner walls of the two sliding grooves; the outer wall of one side of the supporting plate is fixedly provided with two supporting rods, the heliostat is fixedly arranged on the two supporting rods, and the first sponge cleaning body, the spray head and the second sponge cleaning body are respectively matched with the heliostat.
4. The heat storage and heat exchange integrated power generation device for the solar power generation system as claimed in claim 3, characterized in that: the two L-shaped blocks are fixedly provided with limiting round rods, and the limiting round rods are connected with the L-shaped sliding blocks in a sliding manner; fixed mounting has the collecting box on the base, the top fixed mounting of collecting box has the funnel, the bottom fixed mounting of collecting box has the connecting pipe, the connecting pipe runs through the water tank and extends to in the filter vat, the top of water tank articulates there is the apron, the top fixed mounting of quartz filter has the handle, the top of handle extends to the top of filter vat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121362286.XU CN215213786U (en) | 2021-06-18 | 2021-06-18 | Heat storage and exchange integrated power generation device for solar power generation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121362286.XU CN215213786U (en) | 2021-06-18 | 2021-06-18 | Heat storage and exchange integrated power generation device for solar power generation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215213786U true CN215213786U (en) | 2021-12-17 |
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ID=79433242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121362286.XU Expired - Fee Related CN215213786U (en) | 2021-06-18 | 2021-06-18 | Heat storage and exchange integrated power generation device for solar power generation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215213786U (en) |
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2021
- 2021-06-18 CN CN202121362286.XU patent/CN215213786U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211217 |
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| CF01 | Termination of patent right due to non-payment of annual fee |