CN218461666U - Water circulation cooling and dust removing mechanism of horizontal drilling machine - Google Patents
Water circulation cooling and dust removing mechanism of horizontal drilling machine Download PDFInfo
- Publication number
- CN218461666U CN218461666U CN202222616252.XU CN202222616252U CN218461666U CN 218461666 U CN218461666 U CN 218461666U CN 202222616252 U CN202222616252 U CN 202222616252U CN 218461666 U CN218461666 U CN 218461666U
- Authority
- CN
- China
- Prior art keywords
- water
- receiving plate
- drilling machine
- horizontal drilling
- pipe
- 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.)
- Active
Links
Images
Classifications
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Abstract
The utility model relates to the technical field of horizontal drilling machines, in particular to a water circulation cooling and dust removing mechanism of a horizontal drilling machine, which combines water circulation cooling and dust removing with high efficiency, simplifies the structure, reduces the space occupied by the drilling machine and has high practicability; the slag collecting plate is arranged on a workbench of the horizontal drilling machine; still include the water receiving plate, a water pump, the heat dissipation water tank, the raceway, the shower nozzle, rose box and dust removal subassembly, the water receiving plate is installed in the below of receiving the cinder plate, the rose box is installed in the below of water receiving plate, rose box and water receiving plate intercommunication, the input tube and the rose box of water pump are connected, the output tube and the heat dissipation water tank of water pump are connected, heat dissipation water tank's delivery outlet and defeated water piping connection, the shower nozzle is installed to the output of raceway, the shower nozzle is located horizontal drilling machine's workstation top, the shower nozzle water spray is cooled down work piece and drill bit, dust removal subassembly is installed between cinder plate and water receiving plate, dust removal subassembly sees through the cinder plate and absorbs smog, dust removal subassembly cools down heat dissipation water tank.
Description
Technical Field
The utility model relates to a horizontal drilling machine's technical field especially relates to a horizontal drilling machine water circulative cooling dust removal mechanism.
Background
Horizontal drilling machine is the drilling machine that the main shaft level was arranged, be the equipment that is used for giving the work piece drilling, horizontal drilling machine is when drilling, the friction of drill bit and work piece can produce high temperature and smog, the high temperature can cause the drill bit annealing, smog can cause environmental pollution, consequently need dispose the cooling mechanism of circulating water to horizontal drilling machine and cool down to work piece and drill bit, need dispose dust removal subassembly simultaneously and eliminate smog, current horizontal drilling machine's water circulation cooling mechanism and dust removal subassembly are divided two sets of systems, do not have the high efficiency to combine, the structure that causes current equipment is complicated, it is great to occupy the space of drilling machine, the practicality is relatively poor.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a combine water circulative cooling and dust removal high efficiency, simplify the structure, reduce the space that occupies the drilling machine, horizontal drilling machine water circulative cooling dust removal component that the practicality is high.
The utility model discloses a water circulation cooling dust removal mechanism of a horizontal drilling machine, which comprises the horizontal drilling machine and a slag receiving plate, wherein the horizontal drilling machine is provided with a chuck and a drill chuck, a workbench of the horizontal drilling machine is provided with the slag receiving plate, and the slag receiving plate is provided with a large number of water leakage holes; the horizontal drilling machine is characterized by further comprising a water receiving plate, a water pump, a heat dissipation water tank, a water delivery pipe, a spray nozzle, a filter box and a dust removal assembly, wherein the water receiving plate is installed below the slag receiving plate, the water receiving plate is provided with a water collecting tank, the filter box is installed below the water receiving plate and communicated with the water receiving plate, the water pump is installed below a horizontal drilling machine workbench, an input pipe of the water pump is connected with the filter box, an output pipe of the water pump is connected with an input port of the heat dissipation water tank, an output port of the heat dissipation water tank is connected with an input end of the water delivery pipe, the spray nozzle is installed at an output end of the water delivery pipe and located above the workbench of the horizontal drilling machine, the spray nozzle sprays water to cool a workpiece and a drill bit, the dust removal assembly is installed between the slag receiving plate and the water receiving plate, the dust removal assembly absorbs smoke through the slag receiving plate, and the dust removal assembly cools the heat dissipation water tank; the cooling liquid is filled in the filter box, during drilling, a workpiece is clamped on a chuck of the horizontal drilling machine, the drill bit is clamped on a chuck of the horizontal drilling machine, the chuck drives the drill bit to rotate to drill the workpiece, the dust removal assembly operates, the cooling liquid in the filter box is pumped out by the water pump and is input into the heat dissipation water tank, the dust removal assembly blows air to cool the cooling liquid in the heat dissipation water tank, the cooled cooling liquid is conveyed to the spray head through the water pipe and is sprayed out, the cooling water sprayed out of the spray head cools the workpiece and the drill bit, and the smoke cage cover is dedusted, the dust removal assembly absorbs smoke and cooling water mist through the slag receiving plate, efficient combination of a water circulation cooling mechanism and the dust removal assembly is achieved, the structure of the device is simplified, the space occupied by the drilling machine is reduced, and the practicability is high.
Preferably, the dust removal assembly comprises a dust collection hopper, an exhaust pipe and a ducted fan, the dust collection hopper is installed below the slag receiving plate and the spray head, the upper end opening of the dust collection hopper faces the slag receiving plate, the bottom wall of the slag receiving plate is provided with a water outlet pipe, the water outlet pipe faces the water receiving plate, the dust collection hopper is communicated with the air inlet port of the ducted fan through the exhaust pipe, and the air outlet port of the ducted fan faces the heat dissipation water tank; shower nozzle spun water smoke cage cover and remove dust the back, and the dust absorption is fought and is caught most cooling water and discharge the water receiving board through the outlet pipe and circulate, and the operation of duct fan, duct fan are blown the air in fighting the dust absorption through the exhaust tube and are taken out and cool down to the heat dissipation water tank, and the negative pressure in fighting the dust absorption will not be by the absorptive smog of water smoke suction dust absorption simultaneously and fight, improve dust removal effect.
Preferably, the dust collection device further comprises two sliding plates, the left side wall and the right side wall of the horizontal drilling machine are both provided with two horizontal sliding grooves, the left side wall and the right side wall of the dust collection bucket are both provided with the sliding plates, the two sliding plates are respectively installed in the two sliding grooves of the horizontal drilling machine in a sliding manner, and the exhaust pipe is a corrugated hose; two slides are removed along two spouts of horizontal drilling machine, and the position of dust absorption fill is adjusted for the position that the drilling was processed is followed to the dust absorption fill and is adjusted, and the exhaust tube suitably contracts simultaneously, improves dust removal effect.
Preferably, the filter box comprises a box body and a filter screen, the box body is arranged below the water receiving plate, an inlet of an upper port of the box body is communicated with the water receiving plate, the filter screen is horizontally arranged inside the box body, an input pipe of the water pump extends into the box body, and the input pipe of the water pump is positioned between the filter screen and the bottom of the box body; the box is collected the cooling water that the water receiving plate was collected, and the filter screen filters the cooling water, with the iron fillings interception in the cooling water, the input tube of water pump takes the cooling water at box middle part out, realizes the filter effect, improves the practicality.
Preferably, the device also comprises a coiled pipe, and the spray head is connected with the output end of the water pipe through the coiled pipe; through the installation coiled pipe, can adjust the position and the angle of shower nozzle in a flexible way, improve cooling and dust removal effect.
Preferably, the spray head further comprises a three-way valve, a spray pipe and a sprinkler bead, wherein a main channel of the three-way valve is connected with the output end of the coiled pipe, the three-way valve is provided with an adjusting knob, one auxiliary channel of the three-way valve is provided with the spray pipe, the sprinkler bead is adjusted outside the spray pipe and is provided with a plurality of spray holes, and a water inlet of the sprinkler bead is connected with the other auxiliary channel of the three-way valve; the three-way valve divides into two with the cooling water that the coiled pipe was carried, and one is the water column blowout through the spray tube and cools off work piece and drill bit, and another forms the water smoke blowout through the sprinkler bead, and water smoke covers the smog and absorbs, realizes high-efficient cooling and removes dust, and the adjust knob who rotates the three-way valve can distribute the proportion of two strands of cooling water, and the practicality is high.
Preferably, the water spraying device further comprises a water retaining sleeve, the water retaining sleeve is rotatably sleeved on the extending end of the water spraying head, a plurality of water outlet holes are formed in an end cover of the water retaining sleeve, and the plurality of water outlet holes are aligned with the plurality of spray holes of the water spraying head; the water sleeve is rotated, so that the water outlet hole of the water sleeve shields the spray hole of the sprinkler head respectively, the spraying form is changed, and the practicability is improved.
Compared with the prior art, the beneficial effects of the utility model are that: the coolant is filled in the filter box, during drilling, the workpiece is clamped on a chuck of the horizontal drilling machine, the drill bit is clamped on a chuck of the horizontal drilling machine, the chuck drives the drill bit to rotate to drill the workpiece, the dedusting assembly operates, the water pump takes out the coolant in the filter box and inputs the coolant into the radiating water tank, the dedusting assembly blows air to cool the coolant in the radiating water tank, the cooled coolant is conveyed to the spray head through the water pipe to be sprayed out, the spray head sprayed coolant cools the workpiece and the drill bit, and removes dust of the smoke cage cover, the dedusting assembly absorbs smoke and cooling water mist through the slag receiving plate, efficient combination of a water circulation cooling mechanism and the dedusting assembly is achieved, the structure of equipment is simplified, the space occupied by the drilling machine is reduced, and the practicability is high.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic side view of the present invention;
FIG. 3 is a schematic structural diagram of the structures of a slag receiving plate, a water pump, a heat dissipation water tank, a dust removal assembly and the like;
FIG. 4 is a schematic view of a partial enlarged structure at A;
FIG. 5 is an enlarged schematic view of the structure of the heat sink water tank, the water pipe and the spray head;
in the drawings, the reference numbers: 1. a horizontal drilling machine; 2. a slag receiving plate; 3. a water receiving plate; 4. a water pump; 5. a heat radiation water tank; 6. a water delivery pipe; 7. a spray head; 8. a dust suction hopper; 9. an air exhaust pipe; 10. a ducted fan; 11. a slide plate; 12. a box body; 13. filtering with a screen; 14. a serpentine tube; 15. a three-way valve; 16. a nozzle; 17. a sprinkler head; 18. a water-retaining sleeve.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Example 1
As shown in fig. 3 and 4, the dust removing assembly includes a dust collecting bucket 8, an air exhaust pipe 9 and a ducted fan 10, the dust collecting bucket 8 is installed below the slag receiving plate 2 and the spray head 7, an upper port of the dust collecting bucket 8 faces the slag receiving plate 2, a water outlet pipe is arranged on the bottom wall of the slag receiving plate 2 and faces the water receiving plate 3, the dust collecting bucket 8 is communicated with an air inlet port of the ducted fan 10 through the air exhaust pipe 9, and an air outlet port of the ducted fan 10 faces the heat radiation water tank 5; still include two slides 11, all be provided with two horizontally spouts on the lateral wall about horizontal drilling machine 1, all install slide 11 on the lateral wall about dust absorption fill 8, two slides 11 respectively slidable mounting in two spouts of horizontal drilling machine 1, exhaust tube 9 sets up to the corrugated hose.
Two slides 11 are removed along two spouts of horizontal drilling machine 1, the position of dust absorption fill 8 is adjusted, make dust absorption fill 8 be located the position below of drilling processing, exhaust tube 9 suitably contracts simultaneously, 7 spun water smoke of shower nozzle cover and remove dust the back with smog, dust absorption fill 8 catches most cooling water and discharges through the outlet pipe and circulate in water receiving plate 3 and box 12, duct fan 10 moves, duct fan 10 takes out the air in dust absorption fill 8 through exhaust tube 9 and blows to radiator tank 5 and cool down, negative pressure in dust absorption fill 8 will not be by during the absorptive smog of water smoke inhales dust absorption fill 8 simultaneously.
Example 2
As shown in fig. 1, fig. 2 and fig. 5, the spray head 7 is connected with the output end of the water pipe 6 through the coiled pipe 14; the spray head 7 further comprises a three-way valve 15, a spray pipe 16 and a spray head 17, wherein a main channel of the three-way valve 15 is connected with the output end of the coiled pipe 14, an adjusting knob is arranged on the three-way valve 15, the spray pipe 16 is arranged on one auxiliary channel of the three-way valve 15, the spray head 17 is adjusted outside the spray pipe 16, the spray head 17 is provided with a plurality of spray holes, and a water inlet of the spray head 17 is connected with the other auxiliary channel of the three-way valve 15; still include water retaining sleeve 18, water retaining sleeve 18 rotates the suit on the extension of sprinkler bead 17, is provided with a plurality of apopores on the end cover of water retaining sleeve 18, and a plurality of apopores align with a plurality of orifices of sprinkler bead 17.
The adjusting coiled pipe 14 is pulled, the position and the angle of the spray head 7 are adjusted, the spray pipe 16 sprays cooling water in a water column mode to cool the workpiece and the drill bit, meanwhile, the cooling water forms water mist through the spray head 17 to spray, the water mist covers and absorbs the water mist, the adjusting knob of the three-way valve 15 is rotated to distribute the proportion of the two cooling water, the water retaining sleeve 18 is rotated, the water outlet hole of the water retaining sleeve 18 shields the spray hole of the spray head 17 respectively, and therefore the spraying mode is changed.
As shown in fig. 1 to 5, the utility model discloses a horizontal drilling machine water circulative cooling dust removal mechanism, it is at the during operation, at first with the work piece clamping to horizontal drilling machine 1's chuck on, the chuck drives the drill bit and rotates to the work piece drilling, later start duct fan 10, water pump 4 is taken the coolant liquid out in with box 12 and through inputing to radiator tank 5, duct fan 10 is bloied and is cooled down to the coolant liquid in radiator tank 5, the coolant liquid after the cooling carries shower nozzle 7 blowout through raceway 6 and coiled pipe 14, then rotate the 18 adjustment spraying forms of manger plate sleeve, 16 spun cooling water of spray tube cools down work piece and drill bit, sprinkler head 17 blowout water smoke cage removes dust, the negative pressure in the last dust absorption fill 8 will not be seen through the dust receiving plate 2 suction dust absorption fill 8 by the absorptive smog of water smoke, dust absorption fill 8 catches on most cooling water and realizes the cooling water circulation can in discharging outlet pipe 3 and box 12 through discharging simultaneously.
The utility model discloses the main function who realizes does: the water circulation cooling and the dust removal are combined efficiently, the structure is simplified, the space occupied by the drilling machine is reduced, and the practicability is high.
The installation mode, the connection mode or the setting mode of the water circulation cooling dust removing mechanism of the horizontal drilling machine of the utility model are common mechanical modes, and the water circulation cooling dust removing mechanism can be implemented as long as the beneficial effects can be achieved; the utility model discloses a horizontal drilling machine 1 of horizontal drilling machine hydrologic cycle cooling dust removal mechanism, connect sediment board 2, water receiving plate 3, water pump 4, heat radiation water tank 5, raceway 6, exhaust tube 9, duct fan 10, filter screen 13, coiled pipe 14, three-way valve 15 are purchase on the market, and this industry technical staff only need according to its subsidiary service instruction install and operate can, and need not the technical staff in this field and pay out creative work.
All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (7)
1. A water circulation cooling dust removal mechanism of a horizontal drilling machine comprises the horizontal drilling machine (1) and a slag receiving plate (2), wherein the horizontal drilling machine (1) is provided with a chuck and a drill chuck, a workbench of the horizontal drilling machine (1) is provided with the slag receiving plate (2), and the slag receiving plate (2) is provided with a large number of water leakage holes; the device is characterized by further comprising a water receiving plate (3), a water pump (4), a heat dissipation water tank (5), a water conveying pipe (6), a spray head (7), a filter box and a dust removal assembly, wherein the water receiving plate (3) is installed below the slag receiving plate (2), the water receiving plate (3) is provided with a water collecting tank, the filter box is installed below the water receiving plate (3), the filter box is communicated with the water receiving plate (3), the water pump (4) is installed below a horizontal drilling machine (1) workbench, an input pipe of the water pump (4) is connected with the filter box, an output pipe of the water pump (4) is connected with an input port of the heat dissipation water tank (5), an output port of the heat dissipation water tank (5) is connected with an input end of the water conveying pipe (6), the spray head (7) is installed at an output end of the water conveying pipe (6), the spray head (7) is located above the workbench of the horizontal drilling machine (1), the spray head (7) sprays water to cool a workpiece and a drill bit, the dust removal assembly is installed between the slag receiving plate (2) and the dust removal assembly absorbs the slag receiving plate (3), and the heat dissipation water tank (5) cools smoke.
2. The water circulation cooling dust removal mechanism of the horizontal drilling machine as claimed in claim 1, wherein the dust removal assembly comprises a dust collection hopper (8), an air suction pipe (9) and a ducted fan (10), the dust collection hopper (8) is installed below the slag receiving plate (2) and the spray head (7), the upper end of the dust collection hopper (8) faces the slag receiving plate (2), the bottom wall of the slag receiving plate (2) is provided with an outlet pipe, the outlet pipe faces the water receiving plate (3), the dust collection hopper (8) is communicated with the air inlet of the ducted fan (10) through the air suction pipe (9), and the air outlet of the ducted fan (10) faces the heat radiation water tank (5).
3. The mechanism for cooling and dedusting a horizontal drilling machine by water circulation as claimed in claim 2, further comprising two sliding plates (11), wherein two horizontal sliding grooves are arranged on the left and right side walls of the horizontal drilling machine (1), the sliding plates (11) are arranged on the left and right side walls of the dust collection bucket (8), the two sliding plates (11) are respectively slidably arranged in the two sliding grooves of the horizontal drilling machine (1), and the air suction pipe (9) is a corrugated hose.
4. The water circulation cooling dust removal mechanism for the horizontal drilling machine as claimed in claim 1, wherein the filter box comprises a box body (12) and a filter screen (13), the box body (12) is installed below the water receiving plate (3), an inlet of an upper port of the box body (12) is communicated with the water receiving plate (3), the filter screen (13) is horizontally installed inside the box body (12), an input pipe of the water pump (4) extends into the box body (12), and the input pipe of the water pump (4) is located between the filter screen (13) and the bottom of the box body (12).
5. The water circulation cooling dust removing mechanism of the horizontal drilling machine as claimed in claim 1, further comprising a coiled pipe (14), wherein the spray head (7) is connected with the output end of the water conveying pipe (6) through the coiled pipe (14).
6. The water circulation cooling dust removing mechanism of the horizontal drilling machine as claimed in claim 5, wherein the nozzle (7) further comprises a three-way valve (15), a nozzle (16) and a sprinkler head (17), a main channel of the three-way valve (15) is connected with an output end of the serpentine pipe (14), an adjusting knob is arranged on the three-way valve (15), the nozzle (16) is arranged on a secondary channel of the three-way valve (15), the sprinkler head (17) is arranged outside the nozzle (16), the sprinkler head (17) is provided with a plurality of spray holes, and a water inlet of the sprinkler head (17) is connected with another secondary channel of the three-way valve (15).
7. The water circulation cooling dust removing mechanism of the horizontal drilling machine as claimed in claim 6, further comprising a water retaining sleeve (18), wherein the water retaining sleeve (18) is rotatably sleeved on the extending end of the water spraying head (17), the end cover of the water retaining sleeve (18) is provided with a plurality of water outlet holes, and the plurality of water outlet holes are aligned with the plurality of spray holes of the water spraying head (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222616252.XU CN218461666U (en) | 2022-10-05 | 2022-10-05 | Water circulation cooling and dust removing mechanism of horizontal drilling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222616252.XU CN218461666U (en) | 2022-10-05 | 2022-10-05 | Water circulation cooling and dust removing mechanism of horizontal drilling machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218461666U true CN218461666U (en) | 2023-02-10 |
Family
ID=85143593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222616252.XU Active CN218461666U (en) | 2022-10-05 | 2022-10-05 | Water circulation cooling and dust removing mechanism of horizontal drilling machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218461666U (en) |
-
2022
- 2022-10-05 CN CN202222616252.XU patent/CN218461666U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN213237729U (en) | Kitchen air conditioning system | |
| WO2019085211A1 (en) | Kitchen smoke processing device and cooking system | |
| CN102287884B (en) | Pipe-type indirect and spray-fan evaporative-cooling air-conditioner set adopting disk filter | |
| CN107589814B (en) | Computer cabinet | |
| CN109048487A (en) | A kind of processing cooling device of numer centre | |
| KR20130060694A (en) | Cooling tower | |
| CN106140545B (en) | Double air inlet water rotation type water-screen cabinets | |
| CN218461666U (en) | Water circulation cooling and dust removing mechanism of horizontal drilling machine | |
| CN209378696U (en) | A kind of exhaust gas spray structure of forming machine | |
| CN209944555U (en) | Air purification module, air conditioner indoor unit and air conditioner | |
| CN218673221U (en) | Heating and ventilating cooling tower | |
| CN105042735B (en) | Folded plate type indirect fluid power spray room composite evaporation cooling air conditioning unit | |
| CN215723686U (en) | Energy-saving air conditioner multi-inlet and multi-outlet radiator | |
| CN206748169U (en) | A kind of multistation dedusting polishes all-in-one | |
| CN215765459U (en) | Full-direct-current frequency conversion outdoor unit device | |
| CN210628256U (en) | Groove type equipment and air duct structure thereof | |
| CN207779196U (en) | It is capable of the high efficiency and heat radiation equipment of dust removal and filtration | |
| CN219879475U (en) | A equipment that is used for automatic number machine that spouts to press down dirt | |
| CN113623742B (en) | Water purification module and air conditioner | |
| CN113623745B (en) | Water purification module and air conditioner | |
| CN219908040U (en) | Air circulation device for high-speed cable braiding machine | |
| CN211759135U (en) | Numerical control plasma cutting machine operation panel with cooling function | |
| CN217636861U (en) | Rapid cooling system for cooling tower | |
| CN214922791U (en) | Numerical control vertical machining center capable of efficiently dissipating heat | |
| CN216289632U (en) | Sensor-based control cabinet with autonomous heat extraction structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |