CN213643526U - High-efficient probing dust collector - Google Patents
High-efficient probing dust collector Download PDFInfo
- Publication number
- CN213643526U CN213643526U CN202022040302.5U CN202022040302U CN213643526U CN 213643526 U CN213643526 U CN 213643526U CN 202022040302 U CN202022040302 U CN 202022040302U CN 213643526 U CN213643526 U CN 213643526U
- Authority
- CN
- China
- Prior art keywords
- expansion pipe
- guide
- pipe
- storage tank
- filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000000428 dust Substances 0.000 title claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 51
- 238000009434 installation Methods 0.000 claims abstract description 7
- 230000000694 effects Effects 0.000 claims abstract description 6
- 238000005553 drilling Methods 0.000 claims description 20
- 238000007790 scraping Methods 0.000 claims description 17
- 230000001680 brushing effect Effects 0.000 claims description 14
- 238000001125 extrusion Methods 0.000 claims description 11
- 230000009471 action Effects 0.000 claims description 5
- 238000000605 extraction Methods 0.000 claims 5
- 238000001914 filtration Methods 0.000 abstract description 15
- 238000012423 maintenance Methods 0.000 abstract description 4
- 125000004122 cyclic group Chemical group 0.000 abstract description 2
- 239000007921 spray Substances 0.000 description 6
- 238000000889 atomisation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
Images
Landscapes
- Auxiliary Devices For Machine Tools (AREA)
Abstract
The utility model discloses a high-efficient probing dust collector, including storage water tank, stand pipe and expansion pipe, the filtration storehouse is installed to one side of the inside bottom of storage water tank, and the inside top that is close to filtration storehouse one side of storage water tank is fixed with the atomizing shower nozzle, the storage water tank is close to one side of filtering the storehouse and installs the water pump, the output and the atomizing shower nozzle intercommunication of water pump, and the input of water pump and filtration storehouse intercommunication, the top intercommunication of storage water tank has the stand pipe. This high-efficient probing dust collector scrapes the threaded connection of brush board and reciprocal lead screw through the U type to and the sliding connection of brush board and installation storehouse is scraped to the U type, when making the motor drive reciprocal lead screw and rotate, the brush board is scraped to the U type can constantly up-and-down reciprocating motion thereupon, thereby scrape the brush to the filter, avoid it to receive the jam easily, guarantee the high-efficient dust removal effect of equipment, and make things convenient for operating personnel to carry out the dismouting maintenance to the filter, and can carry out cyclic utilization to the water resource.
Description
Technical Field
The utility model relates to a probing dust removal technical field specifically is a high-efficient probing dust collector.
Background
The drilling technology is one of the important modes of modern geological exploration, and mainly utilizes the mechanical engineering technology of deep drilling to extract natural resources at the bottom of the earth or the seabed or adopt the live section of a stratum to extract geological samples, so that operators can conveniently research geological conditions according to the samples, and in the actual drilling process, large dust can be generated, in order to improve the drilling environment, the drilling dust removal device is often required to be used for removing dust, the traditional drilling dust removal device can basically meet the use requirements of people, but certain problems still exist, and the specific problems are as follows:
1. when the existing drilling dust removal device is used, a front end filter part of the existing drilling dust removal device is influenced by suction force, and partial impurities are easy to adhere to the front end filter part, so that the area of an air inlet part is reduced, the actual dust collection and removal range of the device is reduced, and the subsequent dust removal efficiency of the device is influenced;
2. when the existing drilling dust removal device is used, the front end filtering part of the existing drilling dust removal device is usually detachably installed through traditional modes such as a screw rod, but in the actual use process, the front end filtering part is troublesome to disassemble and assemble, and then the maintenance and repair of an operator on the front end filtering part are influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a high-efficient probing dust collector to current probing dust collector front end filtering part who proposes in solving above-mentioned background art receives easily to block up and influences dust collection efficiency, and the comparatively troublesome problem of front end filtering part dismouting.
In order to achieve the above object, the utility model provides a following technical scheme: a high-efficiency drilling dust removal device comprises a water storage tank, a guide pipe and an expansion pipe, wherein a filter bin is installed on one side of the bottom inside the water storage tank, an atomization spray nozzle is fixed at the top of one side, close to the filter bin, inside the water storage tank, an water pump is installed on one side, close to the filter bin, of the water storage tank, the output end of the water pump is communicated with the atomization spray nozzle, the input end of the water pump is communicated with the filter bin, the top of the water storage tank is communicated with the guide pipe, an electric fan is installed inside the guide pipe, one end, far away from the water storage tank, of the electric fan is communicated with the expansion pipe, a first U-shaped block is installed at the middle position of one end of the outer wall of the expansion pipe, an installation bin is fixedly arranged on the outer side of the guide pipe in a sleeved mode, a motor is installed at one end of the top of the, the expansion pipe is characterized in that the guide blocks are pasted on the top and the bottom of the inner wall of the expansion pipe, the filter plate is arranged inside the expansion pipe, guide grooves are formed in the top and the bottom of the filter plate, which are close to one side of the guide blocks, limiting grooves are formed in the outer wall of the filter plate evenly, limiting rods are arranged inside the limiting grooves and penetrate through the expansion pipe, a first spring is connected between the limiting rods and the expansion pipe, a movable ring is sleeved on the outer side of the expansion pipe, an extrusion block is evenly installed on the inner wall of the movable ring, a second U-shaped block is installed at one end, close to the first U-shaped block, of the outer wall of the movable ring, a fixed shaft is fixed on the inner side of the second U-shaped block, an operating rod is sleeved on the outer side of the fixed shaft and extends to the inner side of the first U-shaped block.
Preferably, the U-shaped scraping and brushing plate and the mounting bin form a relative sliding structure, and the U-shaped scraping and brushing plate is in threaded connection with the reciprocating screw rod.
Preferably, the guide groove and the guide block are mutually matched, and the guide groove and the guide block form a relative sliding structure.
Preferably, the cross section of the limiting rod is in a T shape, and the limiting rod and the expansion pipe form a relative sliding structure.
Preferably, the central axis of the movable ring and the central axis of the expansion pipe are coincident with each other, and the movable ring and the expansion pipe form a relative rotation structure.
Preferably, the operating rod and the fixed shaft form a relative rotation structure, and the operating rod and the first U-shaped block form a relative sliding structure.
Compared with the prior art, the beneficial effects of the utility model are that:
1. through the threaded connection between the U-shaped scraping and brushing plate and the reciprocating screw rod and the sliding connection between the U-shaped scraping and brushing plate and the installation bin, when the motor drives the reciprocating screw rod to rotate, the U-shaped scraping and brushing plate can continuously reciprocate up and down along with the reciprocating screw rod, so that the filtering plate is scraped and brushed, the filtering plate is prevented from being easily blocked, and the efficient dust removal effect of equipment is ensured;
2. through the rotating connection of the operating rod and the fixed shaft and the elasticity of the coil spring, an operator can remove the rotation limitation on the movable ring by rotating the operating rod away from the inside of the first U-shaped block, and can drive the extrusion block to remove the extrusion on the limiting rod by rotating the movable ring, so that the limiting rod can automatically leave the inside of the limiting groove under the elastic action of the first spring to remove the limitation on the filter plate, and the operator can conveniently disassemble, assemble and maintain the filter plate;
3. through the output and the atomizer intercommunication of water pump, the input with filter the storehouse intercommunication for the water pump can constantly spray the dust of collecting in carrying to the atomizer through filterable water in the filter bin, increases dust removal effect, can carry out cyclic utilization to the water resource simultaneously.
Drawings
FIG. 1 is a schematic sectional view of the front view of the present invention;
fig. 2 is an enlarged schematic view of a portion a of fig. 1 according to the present invention;
FIG. 3 is a schematic view of the structure of the present invention;
fig. 4 is an enlarged schematic view of the structure of fig. 3B according to the present invention;
FIG. 5 is a side view, cross-sectional structural schematic view of the expanding tube of the present invention;
fig. 6 is an enlarged schematic structural diagram of fig. 5C according to the present invention.
In the figure: 1. a water storage tank; 2. a filtering bin; 3. an atomizing spray head; 4. a water pump; 5. a guide tube; 6. an electric fan; 7. an expansion tube; 8. a first U-shaped block; 9. installing a bin; 10. a motor; 11. a reciprocating screw rod; 12. a U-shaped scraping and brushing plate; 13. a guide block; 14. a filter plate; 15. a guide groove; 16. a limiting groove; 17. a limiting rod; 18. a first spring; 19. a movable ring; 20. extruding the block; 21. a second U-shaped block; 22. a fixed shaft; 23. an operating lever; 24. a coil spring.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-6, the present invention provides a technical solution: a high-efficiency drilling dust removal device comprises a water storage tank 1, a guide pipe 5 and an expansion pipe 7, wherein a filter bin 2 is installed on one side of the bottom inside the water storage tank 1, an atomizing spray nozzle 3 is fixed on the top of one side, close to the filter bin 2, inside the water storage tank 1, a water pump 4 is installed on one side, close to the filter bin 2, of the water storage tank 1, the type of the water pump 4 can be 150QJ10-50/7, the output end of the water pump 4 is communicated with the atomizing spray nozzle 3, the input end of the water pump 4 is communicated with the filter bin 2, the top of the water storage tank 1 is communicated with the guide pipe 5, an electric fan 6 is installed inside the guide pipe 5, one end, far away from the water storage tank 1, of the electric fan 6 is communicated with the expansion pipe 7, a first U-shaped block 8 is installed at the middle position of one end of the outer wall of the expansion pipe, the model of the motor 10 can be MSME-011G1, the output end of the motor 10 is connected with a reciprocating screw rod 11, the reciprocating screw rod 11 penetrates through the installation bin 9, a U-shaped scraping and brushing plate 12 is sleeved on the outer side of the reciprocating screw rod 11, the U-shaped scraping and brushing plate 12 and the installation bin 9 form a relative sliding structure, and the U-shaped scraping and brushing plate 12 and the reciprocating screw rod 11 are in threaded connection, so that when the motor 10 drives the reciprocating screw rod 11 to rotate, the U-shaped scraping and brushing plate 12 can slide up and down in a reciprocating manner along with the reciprocating screw rod, the filter plate 14 is continuously scraped and brushed, and the dust removal effect is prevented from being easily influenced by sundries;
the guide blocks 13 are adhered to the top and the bottom of the inner wall of the expansion pipe 7, the filter plate 14 is arranged inside the expansion pipe 7, the top and the bottom of one side, close to the guide blocks 13, of the filter plate 14 are provided with guide grooves 15, the guide grooves 15 are matched with the guide blocks 13, and the guide grooves 15 and the guide blocks 13 form a relative sliding structure, so that when an operator installs the filter plate 14, the operator can conduct guiding and positioning through mutual alignment of the guide grooves 15 and the guide blocks 13;
the outer wall of the filter plate 14 is uniformly provided with a limiting groove 16, a limiting rod 17 is arranged inside the limiting groove 16, the limiting rod 17 penetrates through the expansion pipe 7, a first spring 18 is connected between the limiting rod 17 and the expansion pipe 7, the cross section of the limiting rod 17 is in a T shape, and the limiting rod 17 and the expansion pipe 7 form a relative sliding structure, so that the limiting rod 17 can slide out of the corresponding limiting groove 16 when not correspondingly extruded, the limiting fixation of the filter plate 14 is released, and an operator can conveniently disassemble and assemble the filter plate 14;
the outer side of the expansion pipe 7 is sleeved with a movable ring 19, the inner wall of the movable ring 19 is uniformly provided with an extrusion block 20, the central axis of the movable ring 19 is overlapped with the central axis of the expansion pipe 7, and the movable ring 19 and the expansion pipe 7 form a relative rotation structure, so that an operator can drive the extrusion block 20 to extrude the limiting rod 17 or relieve the extrusion of the limiting rod 17 by rotating the movable ring 19;
one end of the outer wall of the movable ring 19, which is close to the first U-shaped block 8, is provided with a second U-shaped block 21, a fixing shaft 22 is fixed on the inner side of the second U-shaped block 21, an operating rod 23 is sleeved on the outer side of the fixing shaft 22, the operating rod 23 extends to the inner side of the first U-shaped block 8, a coil spring 24 is connected between the operating rod 23 and the second U-shaped block 21, the operating rod 23 and the fixing shaft 22 form a relative rotation structure, and the operating rod 23 and the first U-shaped block 8 form a relative sliding structure, so that an operator can remove the rotation limitation on the movable ring 19 by rotating the operating rod 23 away from the first U-shaped block 8, and can rotate the movable ring 19 by holding the operating rod 23, thereby completing the subsequent operation.
The working principle is as follows: when the high-efficiency drilling dust removal device is used, the device is powered on, the expansion pipe 7 is close to and aligned with a drilling position, the electric fan 6 is turned on, external air flow drives dust to continuously enter the guide pipe 5 through the expansion pipe 7 and finally enter the water storage tank 1, the dust part falls into clean water in the water storage tank 1, the air flow enters the outside again through air holes in the water storage tank 1, so that dust removal operation can be continuously completed, meanwhile, the control motor 10 drives the reciprocating screw rods 11 to rotate, two groups of reciprocating screw rods 11 are arranged, the two groups of reciprocating screw rods 11 are connected through a belt pulley mechanism, so that the stability of the U-shaped scraping brush plate 12 on the device is ensured, the U-shaped scraping brush plate 12 is connected with the reciprocating screw rods 11 through threads, the U-shaped scraping brush plate 12 is connected with the mounting bin 9 in a sliding manner, so that the two groups of reciprocating screw rods 11, the U-shaped scraping and brushing plate 12 can continuously slide up and down in a reciprocating manner, so that the filtering plate 14 is continuously scraped and brushed, sundries attached to the filtering plate 14 due to suction are cleaned, the size of an air inlet range is prevented from being influenced, high-efficiency dust removal is guaranteed, meanwhile, the water pump 4 is started, filtered water in the filtering bin 2 is continuously conveyed to the atomizing nozzle 3 by the water pump 4 and is sprayed out, dust falling in the guide pipe 5 is sprayed in time, and the dust removal effect is guaranteed;
when the filter plate 14 needs to be disassembled and maintained, the operating rod 23 is rotated away from the corresponding first U-shaped block 8 through the rotating connection of the operating rod 23 and the fixed shaft 22 and the elasticity of the coil spring 24, so that the rotation limitation of the movable ring 19 is removed, the operating rod 23 is held to rotate the movable ring 19, the extrusion block 20 removes the extrusion on the limiting rod 17, the limiting rod 17 slides away from the corresponding limiting groove 16 through the elasticity of the first spring 18 and the sliding connection of the limiting rod 17 and the expansion pipe 7, so that the limiting fixation of the filter plate 14 is removed, the filter plate 14 is taken out from the expansion pipe 7 for maintenance, after the maintenance is completed, the guide groove 15 on the filter plate 14 is aligned with the guide block 13 on the expansion pipe 7, the filter plate 14 is inserted into the expansion pipe 7, the operating rod 23 is held at the moment, the movable ring 19 is rotated reversely, so that the extrusion block 20 extrudes the limiting rod 17 again, make gag lever post 17 reinsert in corresponding spacing groove 16, filter 14 is spacing fixed once more, operating rod 23 just in time aims at first U type piece 8 this moment, guarantee that loose ring 19 can not loosen operating rod 23 slowly under the pivoted circumstances, under the elastic action of coil spring 24, operating rod 23 rotates to the inside of first U type piece 8 again for the rotation of loose ring 19 is restricted, fix and carry out extruded position department at extrusion piece 20 to gag lever post 17, can accomplish the installation to filter 14.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (6)
1. The utility model provides a high-efficient drilling dust collector, includes storage water tank (1), stand pipe (5) and expansion pipe (7), its characterized in that: the water storage tank is characterized in that a filter bin (2) is installed on one side of the bottom inside the water storage tank (1), an atomizing nozzle (3) is fixed on the top of one side, close to the filter bin (2), inside the water storage tank (1), a water pump (4) is installed on one side, close to the filter bin (2), of the water storage tank (1), the output end of the water pump (4) is communicated with the atomizing nozzle (3), the input end of the water pump (4) is communicated with the filter bin (2), the top of the water storage tank (1) is communicated with a guide pipe (5), an electric fan (6) is installed inside the guide pipe (5), one end, far away from the water storage tank (1), of the electric fan (6) is communicated with an expansion pipe (7), a first U-shaped block (8) is installed at the middle position of one end of the outer wall of the expansion pipe (7), a mounting bin (9) is fixedly sleeved outside the guide pipe (5), and a motor, the output end of the motor (10) is connected with a reciprocating screw rod (11), the reciprocating screw rod (11) penetrates through the installation bin (9), the outer side of the reciprocating screw rod (11) is sleeved with a U-shaped scraping and brushing plate (12), the top and the bottom of the inner wall of the expansion pipe (7) are both pasted with guide blocks (13), a filter plate (14) is arranged inside the expansion pipe (7), guide grooves (15) are formed in the top and the bottom of one side, close to the guide blocks (13), of the filter plate (14), limiting grooves (16) are uniformly formed in the outer wall of the filter plate (14), limiting rods (17) are arranged inside the limiting grooves (16), the limiting rods (17) penetrate through the expansion pipe (7), a first spring (18) is connected between the limiting rods (17) and the expansion pipe (7), a movable ring (19) is sleeved on the outer side of the expansion pipe (7), and extrusion blocks (20) are uniformly installed on the inner wall of the movable ring (19, second U type piece (21) are installed to the one end that activity ring (19) outer wall is close to first U type piece (8), and the inboard of second U type piece (21) is fixed with fixed axle (22), the outside cover of fixed axle (22) is equipped with action bars (23), and action bars (23) extend to the inboard of first U type piece (8), be connected with between action bars (23) and second U type piece (21) wind spring (24).
2. The high efficiency drilling dust extraction device of claim 1, wherein: the U-shaped scraping and brushing plate (12) and the mounting bin (9) form a relative sliding structure, and the U-shaped scraping and brushing plate (12) is in threaded connection with the reciprocating screw rod (11).
3. The high efficiency drilling dust extraction device of claim 1, wherein: the guide groove (15) and the guide block (13) are mutually matched, and the guide groove (15) and the guide block (13) form a relative sliding structure.
4. The high efficiency drilling dust extraction device of claim 1, wherein: the cross section of the limiting rod (17) is T-shaped, and the limiting rod (17) and the expansion pipe (7) form a relative sliding structure.
5. The high efficiency drilling dust extraction device of claim 1, wherein: the central axis of the movable ring (19) is superposed with the central axis of the expansion pipe (7), and the movable ring (19) and the expansion pipe (7) form a relative rotation structure.
6. The high efficiency drilling dust extraction device of claim 1, wherein: the operating rod (23) and the fixed shaft (22) form a relative rotation structure, and the operating rod (23) and the first U-shaped block (8) form a relative sliding structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022040302.5U CN213643526U (en) | 2020-09-16 | 2020-09-16 | High-efficient probing dust collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022040302.5U CN213643526U (en) | 2020-09-16 | 2020-09-16 | High-efficient probing dust collector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213643526U true CN213643526U (en) | 2021-07-09 |
Family
ID=76696562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022040302.5U Expired - Fee Related CN213643526U (en) | 2020-09-16 | 2020-09-16 | High-efficient probing dust collector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213643526U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115006927A (en) * | 2022-07-01 | 2022-09-06 | 江苏宏伟除尘配件研发有限公司 | Self-cleaning dust removal filter bag framework and use method thereof |
| CN116459608A (en) * | 2023-04-04 | 2023-07-21 | 青岛青北碳素制品有限公司 | Spraying dust settling device for spherical graphite drying |
-
2020
- 2020-09-16 CN CN202022040302.5U patent/CN213643526U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115006927A (en) * | 2022-07-01 | 2022-09-06 | 江苏宏伟除尘配件研发有限公司 | Self-cleaning dust removal filter bag framework and use method thereof |
| CN116459608A (en) * | 2023-04-04 | 2023-07-21 | 青岛青北碳素制品有限公司 | Spraying dust settling device for spherical graphite drying |
| CN116459608B (en) * | 2023-04-04 | 2023-10-27 | 青岛青北碳素制品有限公司 | Spraying dust settling device for spherical graphite drying |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN211536933U (en) | Electric automatization dust collector | |
| CN213643526U (en) | High-efficient probing dust collector | |
| CN213784561U (en) | Irrigation equipment who has rainwater collection mechanism is used in gardens | |
| CN216844985U (en) | A ventilation unit for building engineering building | |
| CN215138175U (en) | Smoke treatment device for diesel generating set | |
| CN215466465U (en) | Chemical production is with industrial chemicals rinsing device | |
| CN109047081A (en) | A kind of depositing dust formula geological prospecting rock sample clearing apparatus | |
| CN218130633U (en) | Ventilation and filtration device of wind power tower cylinder | |
| CN209378618U (en) | It is a kind of with the industrial filter screen device for removing electrostatic function | |
| CN208840080U (en) | A kind of dedicated cleaning device of green wood flitch | |
| CN217235997U (en) | Clean factory building energy-saving equipment in tall and big space based on EC fan uses | |
| CN211757202U (en) | Environment-friendly cleaning equipment for hub bearing | |
| CN211005771U (en) | Cotton device is scraped to drawing frame high efficiency | |
| CN114593517A (en) | Efficient dedusting and filtering hospital ventilating duct | |
| CN211936189U (en) | Dust collector is used in special fertilizer production in flower nursery | |
| CN210103656U (en) | Sewage purification equipment | |
| CN213524987U (en) | Indoor building is with cleaning device who has dust fall mechanism | |
| CN217950621U (en) | Air compressor with waste heat recovery structure | |
| CN220693090U (en) | Cleaning device for solar photovoltaic power generation panel | |
| CN111018152A (en) | Sewage treatment equipment with reverse osmosis function | |
| CN217163566U (en) | Efficient dust removal collecting system | |
| CN220440657U (en) | Quick cleaning equipment for photovoltaic solar panel | |
| CN205253368U (en) | Real -time automatically cleaned air device of diplopore zone circle formula static | |
| CN218722119U (en) | Anion air disinfection cleaner | |
| CN220415676U (en) | Energy-saving pressurized water pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210709 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |