CN211920239U - On-site negative pressure cleaning system - Google Patents
On-site negative pressure cleaning system Download PDFInfo
- Publication number
- CN211920239U CN211920239U CN202020463384.1U CN202020463384U CN211920239U CN 211920239 U CN211920239 U CN 211920239U CN 202020463384 U CN202020463384 U CN 202020463384U CN 211920239 U CN211920239 U CN 211920239U
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- Prior art keywords
- dust
- dust extraction
- fixedly connected
- pumping
- negative pressure
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- Expired - Fee Related
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- 238000004140 cleaning Methods 0.000 title claims abstract description 11
- 239000000428 dust Substances 0.000 claims abstract description 212
- 238000000605 extraction Methods 0.000 claims abstract description 59
- 238000005086 pumping Methods 0.000 claims abstract description 36
- 230000000903 blocking effect Effects 0.000 claims abstract description 35
- 239000004744 fabric Substances 0.000 claims description 27
- 238000004804 winding Methods 0.000 claims description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 2
- 239000004568 cement Substances 0.000 abstract description 41
- 230000000694 effects Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000005574 cross-species transmission Effects 0.000 abstract description 2
- 238000000746 purification Methods 0.000 abstract description 2
- 238000003860 storage Methods 0.000 description 11
- 230000000149 penetrating effect Effects 0.000 description 3
- 230000029058 respiratory gaseous exchange Effects 0.000 description 2
- 238000005352 clarification Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model relates to the technical field of cement production, in particular to an on-site negative pressure cleaning system, which comprises a dust pumping device, a plurality of telescopic dust pumping pipelines and a lifting device for enabling the dust pumping pipelines to be telescopic, wherein the lifting device is fixedly arranged on the dust pumping device, the lifting device is fixedly connected with the dust pumping pipelines, the dust pumping device is provided with a dust pumping port and a dust exhaust port, the dust pumping pipeline is fixedly arranged at the dust pumping port, the dust exhaust port is fixedly provided with a dust exhaust pipeline which is communicated with next-level purification equipment, the dust pumping device is arranged on a ceiling, the ceiling is provided with abdicating grooves corresponding to the number of the dust pumping pipelines, the dust pumping pipeline passes through the abdicating grooves, the dust exhaust pipeline is provided with a dust blocking structure, the dust blocking structure comprises a dust pumping cover and a dust blocking part, the dust pumping cover is fixedly arranged at one end of the dust pumping pipeline, which is deviated from the connection with the dust pumping port, the suction port of the dust pumping cover is relatively, the dust blocking part is arranged between the dust extraction covers, and the dust blocking structure is detachably connected with the dust extraction covers. The utility model discloses have the effect that reduces the dust in cement bag both sides and spill over.
Description
Technical Field
The utility model belongs to the technical field of the technique of cement manufacture and specifically relates to a scene negative pressure clearance system is related to.
Background
At present, in the cement production process, when a cement bag on a car loader falls to a cement car in the bagged cement car loading link, due to the fall of a certain height, when the cement bag is subjected to the stacked package impact force, the cement in the bag seeps out into the air from the bag along with the impact force. The dust follows the air current motion, produces the dust pollution of high concentration, not only causes the waste of cement finished product, directly influences workman's healthy moreover, so need set up the clearance system that is used for removing dust when cement loading.
For example, the dust removing device of the chinese patent bagged cement loading line disclosed in patent publication No. CN209668352U includes a horizontal conveyor belt and a lifting conveyor belt, the lifting conveyor belt is connected with the horizontal conveyor belt and inclines downward and extends to the vicinity of the stacking area of the stacked bagged cement of the vehicle, the dust removing device includes a dust remover, a first pipeline, a first dust hood and a second pipeline; the dust remover is provided with a dust remover inlet; the first pipeline is communicated with an inlet of the dust remover; the inner space of the first dust collection cover is communicated with the inlet of the dust remover through a first pipeline, the part of the first dust collection cover is positioned above the bottom end of the lifting conveying belt, the opening of the first dust collection cover faces downwards, and the bottom end of the first dust collection cover is lower than the breathing height of the mouth of a worker; one end of the second pipeline is communicated with an inlet of the dust remover, the other end of the second pipeline is provided with a dust collecting port, the dust collecting port is communicated with the inlet of the dust remover through the second pipeline, and the dust collecting port is lower than the breathing height.
The above prior art solutions have the following drawbacks: the opening of the first dust collection cover faces downwards, when the cement bag falls to the ground, the dust above the cement bag is mainly sucked, and the dust on two sides of the cement bag easily overflows.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, one of the purposes of the utility model is to provide an on-spot negative pressure clearance system, set up and taken out the dirt structure, it has the effect that reduces the cement bag both sides dust and spill over.
The above object of the present invention is achieved by the following technical solutions: the on-site negative pressure cleaning system comprises a dust pumping device, a plurality of telescopic dust pumping pipelines and a lifting device for enabling the dust pumping pipelines to stretch, wherein the lifting device is fixedly arranged on the dust pumping device and is fixedly connected with the dust pumping pipelines, the dust pumping device is provided with a dust pumping port and a dust exhaust port, the dust pumping pipeline is fixedly arranged at the dust pumping port, the dust exhaust port is fixedly provided with a dust exhaust pipeline, the dust exhaust pipeline is communicated with next-stage purification equipment, the dust pumping device is arranged on a ceiling, the ceiling is provided with abdicating grooves corresponding to the number of the dust pumping pipelines, the dust pumping pipeline penetrates the abdicating grooves, the dust pumping pipeline is provided with a dust blocking structure, the dust blocking structure comprises a dust pumping cover and a dust blocking part, the dust pumping cover is fixedly arranged at one end of the dust pumping pipeline deviating from the end connected with the dust pumping port, and the suction port of the dust pumping cover is arranged oppositely, the dust blocking part is arranged between the dust extraction covers, and the dust blocking structure is detachably connected with the dust extraction covers.
Through adopting above-mentioned technical scheme, when bagged cement loading, on cement delivered to the bottom plate in carriage through the conveyer belt, will take out the dirt pipeline and descend, make take out the dirt cover and arrange the carriage bottom plate in, and be located the both sides of cement bag placement, keep off the top that the dirt position is located the cement bag placement, when the cement bag falls on the bottom plate in carriage, take out the dirt cover and take out the dirt operation from the both sides of cement bag, keep off dirt portion and be used for blockking the dust that flies up to cement bag top.
The present invention may be further configured in a preferred embodiment as: the dust blocking part comprises a storage box and dust blocking cloth which can be drawn out from the storage box, the storage box is fixedly connected with one of the relative dust extraction covers, the end part of the dust blocking cloth which is drawn out is detachably connected with the other dust extraction cover, an opening is formed in the storage box, a rotating shaft is arranged in the storage box, the dust blocking cloth is wound on the rotating shaft, and a reset device which is used for enabling the dust blocking cloth to be automatically folded is arranged on the rotating shaft.
Through adopting above-mentioned technical scheme, the receiver with can be from the setting of the fender dirt cloth of taking out in the receiver, make the dust extraction cover when going up and down, take out each other not influence between the dirt cover.
The present invention may be further configured in a preferred embodiment as: the dust cloth stretches out the opening and the tip is provided with the couple, takes out the fixed connecting plate that is provided with the connecting hole that is provided with on the dirt cover, the couple can be dismantled with the connecting plate and be connected.
Through adopting above-mentioned technical scheme, the setting of couple and connecting plate to the tip that the realization dirt blocking cloth was taken out can dismantle the purpose of being connected with taking out the dirt cover, and after the height of taking out the dirt cover has been adjusted, take out the dirt blocking cloth, make the couple be connected with the connecting plate can.
The present invention may be further configured in a preferred embodiment as: the reset device is set to be a volute spiral spring, the volute spiral spring is wound on the rotating shaft, one end of the volute spiral spring is fixedly connected with the rotating shaft, and the other end of the volute spiral spring is fixedly connected with the dust blocking cloth.
Through adopting above-mentioned technical scheme, when adjusting the dust extraction cover height, pull down the couple, the spiral spring shrink is automatic to be kept off dirt cloth and is packed up.
The present invention may be further configured in a preferred embodiment as: the dust exhaust pipeline comprises a first fixed pipe, a second fixed pipe and a folding pipe, the first fixed pipe and the second fixed pipe are respectively fixedly connected to two ends of the folding pipe, the first fixed pipe is fixedly connected with a dust exhaust port, the second fixed pipe is fixedly connected with a dust exhaust cover, the first fixed pipe and the second fixed pipe are both set to be hard pipes, the material of the folding pipe is set to be flexible, and the lifting device is fixedly connected with the folding pipe.
Through adopting above-mentioned technical scheme, the folding tube is scalable, makes the dust exhaust pipe can go up and down, and adjustable dust height of taking out is fixed to first fixed pipe and second and is used for supporting the folding tube.
The present invention may be further configured in a preferred embodiment as: the lifting device comprises a steel wire rope and a winding part used for winding and unwinding the rope, rope penetrating rings are arranged on the first fixing pipe and the folding pipe, the steel wire rope penetrates through the rope penetrating rings, and the end part of the steel wire rope is fixedly connected with the rope penetrating rings on the folding pipe, which are close to the second fixing pipe.
Through adopting above-mentioned technical scheme, when the hoist portion was received the rope, can make folding pipe fold to the ceiling direction, the fixed pipe of second removes to the ceiling direction, and then can adjust the height of keeping off the dust structure according to the height in carriage.
The present invention may be further configured in a preferred embodiment as: the winding part comprises a rotating shaft and a driving motor, a connecting seat is arranged on the dust extraction device, the rotating shaft is erected between the connecting seats and is rotatably connected with the connecting seat, the driving motor is coaxially fixed with the rotating shaft, and the driving motor is fixedly connected with the connecting seat. The steel wire rope is wound on the rotating shaft, and the end part of the steel wire rope, which deviates from the connecting part with the folding pipe, is fixedly connected with the rotating shaft.
Through adopting above-mentioned technical scheme, driving motor can drive the axis of rotation and rotate, and the axis of rotation rotates in order to realize packing up the wire rope and putting down the purpose.
The present invention may be further configured in a preferred embodiment as: the dust extraction device is characterized in that a slide rail is arranged on the ceiling, a pulley is arranged on the dust extraction device, the pulley is in sliding fit with the slide rail, and a driving device used for driving the dust extraction device to move on the slide rail is further arranged on the dust extraction device.
Through adopting above-mentioned technical scheme, when cement when the loading, can park a plurality of vehicles in proper order along the slide rail direction, take out the loading of dirt device through removing and carry out all vehicles, it is higher to take out the efficiency that dirt device department carried out the loading than the vehicle traveles in proper order.
To sum up, the utility model discloses a following at least one useful technological effect:
1. when bagged cement is loaded, cement is conveyed to the bottom plate of a carriage through a conveyor belt, a dust extraction pipeline is lowered, a dust extraction cover is arranged on the bottom plate of the carriage and positioned on two sides of a cement bag falling point, a dust blocking part is positioned above the cement bag falling point, when the cement bag falls on the bottom plate of the carriage, dust extraction operation is carried out on the dust extraction cover from two sides of the cement bag, and the dust blocking part is used for blocking dust flying to the upper side of the cement bag;
2. when cement is in the loading, can park a plurality of vehicles in proper order along the slide rail direction, carry out the loading of all vehicles through removing the dust extraction device, it is higher to take out the efficiency that the dust extraction device department carried out the loading than the vehicle traveles in proper order.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a partially enlarged schematic view of a portion a in fig. 1.
Fig. 3 is a partially enlarged schematic view of a portion B in fig. 1.
Fig. 4 is a partially enlarged schematic view of a portion C in fig. 1.
Reference numerals: 1. a dust extraction device; 10. a connecting seat; 11. a pulley; 2. a dust extraction pipeline; 20. a first stationary tube; 21. a second stationary tube; 22. folding the tube; 23. a stringing ring; 3. a lifting device; 30. a wire rope; 31. a hoisting part; 310. a rotating shaft; 311. a drive motor; 4. a dust exhaust pipeline; 5. a yielding groove; 50. a slide rail; 6. a dust blocking structure; 7. a dust extraction hood; 8. a dust blocking part; 80. a storage box; 800. an opening; 801. a rotating shaft; 81. dust cloth; 82. hooking; 83. a volute spiral spring; 9. a connecting plate; 90. and connecting the holes.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example (b): on-spot negative pressure clearance system, as shown in fig. 1, including taking out dirt device 1, a plurality of can stretch out and draw out dirt pipeline 2 and be used for making the flexible hoisting device 3 of taking out dirt pipeline 2, hoisting device 3 is fixed to be set up on taking out dirt device 1, hoisting device 3 with take out dirt pipeline 2 fixed connection, it is provided with and takes out dirt mouth and dust exhaust port to take out dirt device 1, take out the fixed setting in dust exhaust port department of dirt pipeline 2, dust exhaust port department is fixed to be provided with dust exhaust pipeline 4, dust exhaust pipeline 4 communicates one-level clarification plant down. The dust extraction device 1 is arranged on a ceiling, the ceiling is provided with abdicating grooves 5 corresponding to the number of the dust extraction pipelines 2, the abdicating grooves 5 are arranged on two sides of the dust extraction device 1, and the dust extraction pipelines 2 penetrate the abdicating grooves 5. Take out and have dust structure 6 on dirt pipeline 2, dust structure 6 is including taking out dust hood 7 and keeping off dirt portion 8, and the dust hood 7 is fixed to be set up and is taking out the one end that dirt pipeline 2 deviates from and is being connected with the dust extraction mouth, takes out the relative setting of suction mouth of dirt hood 7, and dust portion 8 sets up and is taking out between dirt hood 7, and dust structure 6 can dismantle with taking out dirt hood 7 and be connected. When bagged cement is loaded, cement is conveyed to the bottom plate of the carriage through the conveying belt, the dust extraction pipeline 2 is lowered, the dust extraction cover 7 is arranged on the bottom plate of the carriage and positioned on two sides of a cement bag falling point, the dust blocking part 8 is positioned above the cement bag falling point, when the cement bag falls on the bottom plate of the carriage, the dust extraction cover 7 performs dust extraction operation from two sides of the cement bag, and the dust blocking part 8 is used for blocking dust flying to the upper side of the cement bag.
As shown in fig. 1, the dust exhaust pipe 2 includes a first fixing pipe 20, a second fixing pipe 21 and a folding pipe 22, the first fixing pipe 20 and the second fixing pipe 21 are respectively and fixedly connected to two ends of the folding pipe 22, the first fixing pipe 20 is fixedly connected to a dust exhaust port, the second fixing pipe 21 is fixedly connected to the dust exhaust cover 7, the first fixing pipe 20 and the second fixing pipe 21 are both hard pipes, and the folding pipe 22 is made of a flexible material. As shown in fig. 2 and 3, the lifting device 3 includes a wire rope 30 and a winding portion 31 for winding and unwinding the rope, the first fixing tube 20 and the folding tube 22 are both provided with a rope threading ring 23, the wire rope 30 passes through the rope threading ring 23, and an end of the wire rope 30 is fixedly connected to the rope threading ring 23 of the folding tube 22 close to the second fixing tube 21. When the winding unit 31 is winding up, the folding pipe 22 can be folded toward the ceiling, the second fixed pipe 21 can be moved toward the ceiling, and the height of the dust retaining structure 6 can be adjusted according to the height of the vehicle compartment.
As shown in fig. 2, the winding part 31 includes a rotating shaft 310 and a driving motor 311, the dust exhaust apparatus 1 is provided with a connecting base 10, the rotating shaft 310 is erected between the connecting bases 10 and is rotatably connected with the connecting base 10, the driving motor 311 is coaxially fixed with the rotating shaft 310, and the driving motor 311 is fixedly connected with the connecting base 10. The wire rope 30 is wound around the rotating shaft 310, and the end of the wire rope 30 away from the end connected to the folding tube 22 is fixedly connected to the rotating shaft 310.
As shown in fig. 1, the dust blocking portion 8 includes a storage box 80 and a dust blocking cloth 81 that can be drawn out from the storage box 80, the storage box 80 is fixedly connected to one of the opposite dust extraction covers 7, and the end of the dust blocking cloth 81 drawn out is detachably connected to the other dust extraction cover 7. As shown in fig. 3 and 4, an opening 800 is formed in the storage box 80, a rotating shaft 801 is arranged in the storage box 80, the dust cloth 81 is wound on the rotating shaft 801, the dust cloth 81 extends out of the opening 800, a hook 82 is arranged at the end of the dust cloth 81, a connecting plate 9 provided with a connecting hole 90 is fixedly arranged on the dust hood 7, and the hook 82 is detachably connected with the connecting plate 9. After the height of the dust hood 7 is adjusted, the dust-blocking cloth 81 is pulled out, and the hook 82 is connected with the connecting plate 9. The rotating shaft 801 is provided with a scroll spring 83 for automatically retracting and restoring the dust cloth 81, the scroll spring 83 is wound on the rotating shaft 801, one end of the scroll spring is fixedly connected with the rotating shaft 801, and the other end of the scroll spring is fixedly connected with the dust cloth 81. When the height of the dust hood 7 is adjusted, the hook 82 is detached, and the scroll spring 83 contracts to automatically retract the dust cloth 81.
As shown in fig. 1 and 2, a slide rail 50 is disposed on the ceiling, a pulley 11 is disposed on the dust extraction device 1, the pulley 11 is slidably fitted on the slide rail 50, and a driving device for driving the dust extraction device 1 to move on the slide rail 50 is further disposed on the dust extraction device 1. When cement is in the loading, can park a plurality of vehicles in proper order along slide rail 50 direction, take out dirt device 1 through the removal and carry out the loading of all vehicles, it is higher to take out dirt device 1 department than the vehicle traveles in proper order and carry out the loading efficiency.
The implementation principle of the embodiment is as follows: the side plate of the carriage of the truck is put down, the driving device is started to enable the dust extraction device 1 to move to the carriage, the motor is started, the dust extraction pipeline 2 is put down until the dust extraction cover 7 is abutted against the bottom plate of the carriage, the dust blocking cloth 81 is pulled out, the hook 82 is hung on the connecting plate 9, and the dust extraction device 1 is started to extract dust.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (8)
1. On-spot negative pressure clearance system, its characterized in that: comprises a dust extraction device (1), a plurality of telescopic dust extraction pipelines (2) and a lifting device (3) used for enabling the dust extraction pipelines (2) to be telescopic, wherein the lifting device (3) is fixedly arranged on the dust extraction device (1), the lifting device (3) is fixedly connected with the dust extraction pipelines (2), the dust extraction device (1) is provided with a dust extraction port and a dust exhaust port, the dust extraction pipelines (2) are fixedly arranged at the dust extraction port, the dust exhaust port is fixedly provided with a dust exhaust pipeline (4), the dust exhaust pipeline (4) is communicated with a next-stage purifying device, the dust extraction device (1) is arranged on a ceiling, the ceiling is provided with abdication grooves (5) corresponding to the number of the dust extraction pipelines (2), the dust extraction pipelines (2) pass the abdication grooves (5), the dust extraction pipelines (2) are provided with dust blocking structures (6), and the dust blocking structures (6) comprise dust extraction covers (7) and dust blocking parts (8), the dust hood (7) is fixedly arranged at one end of the dust extraction pipeline (2) which deviates from the end connected with the dust extraction port, the suction port of the dust hood (7) is arranged oppositely, the dust blocking part (8) is arranged between the dust hoods (7), and the dust blocking structure (6) is detachably connected with the dust hood (7).
2. The on-site negative pressure cleaning system according to claim 1, wherein: keep off dirt portion (8) including receiver (80) and keep off dirt cloth (81) that can take out from receiver (80), fixed connection in receiver (80) and relative suction hood (7), the tip that keeps off dirt cloth (81) were taken out can be dismantled with another suction hood (7) and be connected, be provided with opening (800) on receiver (80), be provided with pivot (801) in receiver (80), keep off dirt cloth (81) winding on pivot (801), be provided with the resetting means who is used for making dust cloth (81) automatic packing up on pivot (801).
3. The on-site negative pressure cleaning system according to claim 2, wherein the dust cloth (81) extends out of the opening (800) and is provided with a hook (82) at the end, a connecting plate (9) provided with a connecting hole (90) is fixedly arranged on the dust hood (7), and the hook (82) is detachably connected with the connecting plate (9).
4. The on-site negative pressure cleaning system as claimed in claim 2, wherein the resetting device is configured as a scroll spring (83), the scroll spring (83) is wound on the rotating shaft (801), one end of the scroll spring is fixedly connected with the rotating shaft (801), and the other end of the scroll spring is fixedly connected with the dust cloth (81).
5. The on-site negative pressure cleaning system according to claim 1, wherein the dust exhaust pipeline (2) comprises a first fixed pipe (20), a second fixed pipe (21) and a folding pipe (22), the first fixed pipe (20) and the second fixed pipe (21) are respectively fixedly connected to two ends of the folding pipe (22), the first fixed pipe (20) is fixedly connected to the dust exhaust port, the second fixed pipe (21) is fixedly connected to the dust exhaust cover (7), the first fixed pipe (20) and the second fixed pipe (21) are both hard pipes, the folding pipe (22) is made of flexible materials, and the lifting device (3) is fixedly connected to the folding pipe (22).
6. The on-site negative pressure cleaning system according to claim 5, wherein the lifting device (3) comprises a steel wire rope (30) and a winding part (31) for winding and unwinding the rope, the first fixed pipe (20) and the folding pipe (22) are respectively provided with a rope threading ring (23), the steel wire rope (30) penetrates through the rope threading ring (23), and the end part of the steel wire rope (30) is fixedly connected with the rope threading ring (23) on the folding pipe (22) close to the second fixed pipe (21).
7. The on-site negative pressure cleaning system according to claim 6, wherein the winding part (31) comprises a rotating shaft (310) and a driving motor (311), the dust pumping device (1) is provided with the connecting seats (10), the rotating shaft (310) is erected between the connecting seats (10) and is rotatably connected with the connecting seats (10), the driving motor (311) is coaxially fixed with the rotating shaft (310), the driving motor (311) is fixedly connected with the connecting seats (10), the steel wire rope (30) is wound on the rotating shaft (310), and the end part of the steel wire rope (30) departing from the end part connected with the folding pipe (22) is fixedly connected with the rotating shaft (310).
8. The on-site negative pressure cleaning system according to claim 1, wherein a slide rail (50) is arranged on the ceiling, a pulley (11) is arranged on the dust extraction device (1), the pulley (11) is slidably fitted on the slide rail (50), and a driving device for driving the dust extraction device (1) to move on the slide rail (50) is further arranged on the dust extraction device (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020463384.1U CN211920239U (en) | 2020-04-01 | 2020-04-01 | On-site negative pressure cleaning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020463384.1U CN211920239U (en) | 2020-04-01 | 2020-04-01 | On-site negative pressure cleaning system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211920239U true CN211920239U (en) | 2020-11-13 |
Family
ID=73348511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020463384.1U Expired - Fee Related CN211920239U (en) | 2020-04-01 | 2020-04-01 | On-site negative pressure cleaning system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211920239U (en) |
-
2020
- 2020-04-01 CN CN202020463384.1U patent/CN211920239U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201113 |