CN213981004U - Self-cleaning filtering device for locomotive - Google Patents
Self-cleaning filtering device for locomotive Download PDFInfo
- Publication number
- CN213981004U CN213981004U CN202022243206.0U CN202022243206U CN213981004U CN 213981004 U CN213981004 U CN 213981004U CN 202022243206 U CN202022243206 U CN 202022243206U CN 213981004 U CN213981004 U CN 213981004U
- Authority
- CN
- China
- Prior art keywords
- air
- dust
- air inlet
- dust collection
- self
- 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
Landscapes
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The utility model relates to a locomotive is with automatically cleaning filter equipment, including the dust collection box, be provided with air inlet and gas outlet on the dust collection box, install air cleaner in air inlet department, install air filter in the dust collection box, still include dust exhausting fan and compressed air back-spray device, dust exhausting fan's entry end is connected with the dust collecting tank of air cleaner bottom, the dust exhaust pipe is connected to dust exhausting fan's exit end, compressed air back-spray device includes the intake pipe of being connected with compressed air source, installs the solenoid valve that is used for controlling the intake pipe break-make in the intake pipe, and the end of giving vent to anger of intake pipe passes the dust collection box and connects to in the air filter, and the sand and dust that blows off after the back-spray is guided to be collected to the dust collecting tank. The utility model discloses rational in infrastructure, utilize compressed air blowback air filter, cooperate dust exhausting fan simultaneously, realize the dust and sand on automatic clear dust collecting tank and the air filter, extension filter equipment's life can avoid regular parking to overhaul, reduces the maintenance cost.
Description
Technical Field
The utility model relates to an air filtration technical field, in particular to self-cleaning filter equipment for locomotive.
Background
The air inlet filtering device of the diesel engine of the diesel locomotive has the main functions of filtering sand and dust in air entering a cylinder of the diesel engine, ensuring sufficient clean air and fuel oil to be mixed and combusted, and avoiding the sand and dust from entering the cylinder to increase the abrasion of the cylinder, a piston and the like.
Traditional diesel engine filter equipment that admits air, including the colating and the fine filtration two-stage filtration, the colating generally adopts inertial type air cleaner, and the fine filtration generally adopts air filter. External air enters from the air inlet, dirt such as large-particle dust, sand particles and the like is adsorbed by the inertial type air filter, air after rough filtration is further filtered by the paper air filter element, small-particle dust is adsorbed by the filter cartridge, and clean air finally flows out of the air outlet and enters the diesel engine.
Because the locomotive running environment is complex and the running time is long, especially the locomotive running on a line with large environmental wind and sand is easy to accumulate dust on the two-stage filtering device, the air inlet of the diesel engine is not smooth, and the normal work of the engine is influenced. Therefore, according to the operation condition of the prior locomotive, the dust at the bottom of the inertial air filter (coarse filtration) needs to be cleaned periodically, and the air filter element (fine filtration) needs to be replaced and cleaned after being blocked. The maintenance apron that traditional air inlet unit needed the opening device after air filter blockked up dismantles the air filter, accomplishes under the car that the filter core is clean the back and loads the car again and use, need regularly artifical dust and sand of cleaing away the coarse filter in addition, and maintenance time is long and intensity of labour is big, and the maintenance cost is higher. Particularly, vehicles running in severe environment sections for a long time need to frequently replace and clean the filter element, and the overhaul is more frequent.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the main technical problem who solves provides a rational in infrastructure, can self-cleaning dust and sand, extension filter equipment's life, reduces maintenance cost's automatically cleaning filter equipment for locomotive.
In order to achieve the above purpose, the technical scheme of the utility model is that:
the utility model provides a locomotive is with automatically cleaning filter equipment, includes the dust collection box, is provided with air inlet and gas outlet on the dust collection box, installs air cleaner in air inlet department, installs air filter in the dust collection box, still includes dust exhausting fan and compressed air back-spray device, the entry end of dust exhausting fan is connected with the dust collecting tank of air cleaner bottom, dust exhaust pipe is connected to dust exhausting fan's exit end, compressed air back-spray device includes the intake pipe of being connected with compressed air source, installs the solenoid valve that is used for controlling the intake pipe break-make in the intake pipe, and the end of giving vent to anger of intake pipe passes the dust collection box and connects to in the air filter tank, and the sand and dust that blows off after the back-spray is guided and is collected to the dust collecting tank.
Furthermore, a plurality of air filter elements are installed in each dust collection box, the air inlet pipe comprises a main air inlet pipe and a plurality of branch air pipes connected with the main air inlet pipe, and each air filter element is correspondingly provided with one branch air pipe.
Further, the electromagnetic valve adopts an electromagnetic diaphragm valve.
Further, air filter is the cylindric, the intake pipe stretches into air filter's inside.
Further, the end of the air inlet pipe extends at least 2/3 times the length of the air filter element.
Furthermore, be provided with a plurality of air jet on stretching into the inside intake pipe of air filter, the air jet distributes along different radial directions.
Furthermore, a plurality of dust collection boxes are arranged, the air filters arranged on two adjacent dust collection boxes are oppositely arranged, the dust collection grooves at the bottoms are connected into a whole, and the dust collection grooves are connected with the dust removal fan through air pipes.
Further, be provided with the baffle in the dust collection box, the space partition in the dust collection box becomes first air chamber and second air chamber independent relatively, and air inlet and air filter core set up in first air chamber, and air filter core's exit end is installed on the baffle, and the air after the filtration directly gets into the second air chamber, and the gas outlet setting is in the bottom of second air chamber.
Furthermore, the baffle is L-shaped, the bottom plate of the baffle inclines towards the direction of the dust collecting groove on one side, and the outlet end of the air filter element is arranged on the side plate of the air filter element.
Furthermore, the electromagnetic valve is connected with a controller, the controller is connected with a diesel engine air inlet pressure detection device, the pressure detection device transmits a signal to the controller when detecting that the air inlet pressure of the diesel engine reaches a set value, and the controller controls the electromagnetic valve to act.
To sum up, a self-cleaning filter equipment for locomotive, rational in infrastructure, through setting up dust exhausting fan and compressed air back-spray device, utilize compressed air blowback air filter, cooperate dust exhausting fan simultaneously, realize the dust and sand on automatic clear dust collecting tank and the air filter, extension filter equipment's life, and then extension filter core change time can avoid regular parking maintenance, reduces the maintenance cost, especially is showing in high sand blown area effect.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a structural view of the filtering apparatus of the present invention;
fig. 2 is a schematic view of the internal structure of the dust collecting box of the present invention.
As shown in fig. 1 and 2, a dust collecting box 1, an air cleaner 2, a dust collecting groove 2a, an air filter element 3, a dust removing fan 4, a compressed air back-spraying device 5, a partition plate 6, a first air cavity 7, a second air cavity 8, an air pipe 9, a dust exhaust pipe 10, an air inlet pipe 11, a main air inlet pipe 11a, a branch air pipe 11b, an electromagnetic valve 12, an overhaul cover plate 13 and a controller 14.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept by those skilled in the art with reference to specific embodiments.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments, and the following embodiments are used for illustrating the present invention, but do not limit the scope of the present invention.
As shown in fig. 1 and 2, the present embodiment provides a self-cleaning filtering device for a locomotive, which is installed at an air inlet of a diesel engine. The filtering device comprises a dust collecting box 1, an air inlet and an air outlet (not marked in the figure) are arranged on the dust collecting box 1, an air filter 2 is arranged at the air inlet, and an air filter element 3 is arranged in the dust collecting box 1.
In this embodiment, four dust boxes 1 are installed at the air inlet of the diesel engine, each dust box 1 is provided with an air inlet and an air outlet, an air cleaner 2 is installed at the air inlet of each dust box 1, and an air filter element 3 is installed inside each dust box 1. The air outlet is connected with an air inlet pipe of the diesel engine.
Wherein, the air filter 2 is a coarse filter device, and the air filter element 3 is a fine filter device. Preferably, a plurality of air filter elements 3 are adopted, as shown in fig. 1, three air filter elements 3 are installed in each dust box 1 to ensure the filtering effect, the three air filter elements 3 are all preferably paper cylindrical filter elements, and the three air filter elements 3 are installed in the dust boxes 1 side by side.
The air filter 2 is composed of an upper part and a lower part, the upper part is a filter material, the lower part is a dust collecting groove 2a, when the outside air passes through the air filter 2, the filtered sand and dust are deposited in the dust collecting groove 2a at the bottom and collected in the dust collecting groove 2 a. The four dust collecting boxes 1 are oppositely arranged in pairs, the air filters 2 mounted on the two adjacent dust collecting boxes 1 on the same side are oppositely mounted, and the dust collecting grooves 2a at the bottom are connected into a whole, namely, the two air filters 2 share one dust collecting groove 2 a.
As shown in fig. 2, in the present embodiment, a partition plate 6 is disposed in the dust collecting box 1, the partition plate 6 divides the space in the dust collecting box 1 into a first air chamber 7 and a second air chamber 8 which are relatively independent, the air inlet of the dust collecting box 1 and the three air filter elements 3 are disposed in the first air chamber 7, the partition plate 6 preferably adopts an L-shaped structure, three openings are disposed on a side plate of the L-shaped partition plate 6, one air filter element 3 is respectively mounted at each of the three openings, and the outlet end of the air filter element 3 is mounted on the partition plate 6 corresponding to the opening. Outside air enters the first air cavity 7 after being coarsely filtered by the air filter 2 of the air inlet, and is filtered by the three air filter elements 3, the filtered air flows out from the outlet end and directly enters the second air cavity 8, and the air outlet of the dust collection box 1 is arranged at the bottom of the second air cavity 8.
The filter device also comprises a dust removal fan 4 and a compressed air back-spraying device 5, the dust collection groove 2a is connected with the dust removal fan 4 through an air pipe 9, and the outlet end of the dust removal fan 4 is connected with a dust exhaust pipe 10. Under the action of the dust removing fan 4, the sand and dust in the dust collecting groove 2a enters the dust removing fan 4 through the air pipe 9 and is discharged through the dust discharging pipe 10. In this embodiment, preferably, when the diesel engine is in operation, the dust removal fan 4 operates synchronously to discharge the dust in the dust collection groove 2a at any time, and uninterruptedly discharge the dust filtered and deposited in the dust collection groove 2a by the air filter 2 out of the vehicle through the dust discharge pipe 10.
The compressed air back-spraying device 5 comprises an air inlet pipe 11 connected with a compressed air source (not shown in the figure), an electromagnetic valve 12 used for controlling the on-off of the air inlet pipe 11 is installed on the air inlet pipe 11, the electromagnetic valve 12 is connected with a controller 14, the on-off of the air inlet pipe 11 is controlled by the controller 14, and the electromagnetic valve 12 is preferably an electromagnetic diaphragm valve.
The air outlet end of the air inlet pipe 11 penetrates through the dust collection box 1 and is connected to the air filter element 3. Compressed air source can directly use the compressed air on the car, and compressed air spouts to air filter 3 from inside, and then will adsorb the sand and dust blowing on air filter 3, realizes air filter 3's automatically cleaning.
Because four dust collecting boxes 1 are installed, and three air filter elements 3 are installed in each dust collecting box 1, the air inlet pipe 11 comprises a main air inlet pipe 11a and a plurality of branch air pipes 11b connected with the main air inlet pipe 11a, and the main air inlet pipe 11a is connected with a compressed air source. In the embodiment, preferably, the four dust collecting boxes 1 are divided into two left and right pairs, the air inlet pipes 11 penetrate through the middles of the two pairs of dust collecting boxes 11, one total air inlet pipe 11a is arranged corresponding to each pair of dust collecting boxes 1, two total air inlet pipes 11a are arranged, six branch air pipes 11b are connected to each total air inlet pipe 11a, the branch air pipes 11b extend into the air filter element 1 from the outlet end of the air filter element 1, the side plate of the partition plate 6 is arranged at one end facing the branch air pipes 11b, and the branch air pipes 11b penetrate through the box body of the dust collecting boxes 1 to enter the box body and further penetrate through the partition plate 6 to extend into the air filter element 3.
In order to ensure the effect of the back-spray self-cleaning, each of the branch pipes 11b preferably extends into the air filter element 3, and more preferably, the end of the branch pipe 11b extends at least 2/3 of the air filter element 3, and most preferably, the branch pipe 11b extends into the other end of the air filter element 3.
A plurality of air nozzles (not shown) are provided in the branch air pipe 11b extending into the air filter 3, and compressed air is ejected from the air nozzles to the air filter 3 at the periphery. In order to ensure the air injection effect, the air injection ports are preferably distributed in different radial directions, i.e. a plurality of air injection ports inject air in different directions, and at least two adjacent air injection ports are arranged in a non-radial direction to cover all areas of the cylindrical air filter element 3.
The sand and dust blown off after the back-blowing falls onto the partition plate 6 below and is further guided and collected into the dust collection groove 2 a. The bottom plate of the clapboard 6 inclines towards the direction of the dust collecting groove 2a at one side, so that the dust and sand can conveniently flow into the dust collecting groove 2 a. The first air chamber 7 is communicated with the dust collecting groove 2a through an opening, under the action of the dust removing fan 4, sand and dust falling on the partition plate 6 further enter the dust collecting groove 2a and are discharged from the dust discharging pipe 10 together with the sand and dust filtered by the air filter 2.
An openable maintenance cover plate 13 is further arranged on the box body of the dust collection box 1 and is used for facilitating the maintenance personnel to disassemble, assemble and maintain the internal air filter element 3. The maintenance cover plate 13 is arranged on the other side of the box body wall corresponding to the bronchus 11b, after the maintenance cover plate 13 is opened, the dust on the air filter element 3 and the clapboard 6 inside can be cleaned,
in this embodiment, a diesel intake pressure detection device is installed at the diesel intake pipe, and the pressure detection device is connected to the controller 14, and detects the intake pressure of the diesel engine by using the pressure detection device, and transmits a detected pressure signal to the controller 14. When the filtering device normally operates, the pressure value of the diesel engine air inlet pipe is detected in real time by the pressure detection device, sand and dust are filled in gaps of the paper air filter element 3, when blockage occurs, the air inlet pressure can be reduced, and the difference value between the atmospheric pressure and the inlet pressure of the diesel engine air inlet pipe can be increased.
In the present embodiment, a set value of the intake pressure is stored in the controller 14 in advance, and the set value is preferably set to a difference between the atmospheric pressure and the inlet pressure of the diesel intake pipe, for example, the set value is 1800Pa (that is, the difference between the atmospheric pressure and the inlet pressure of the diesel intake pipe is 1800 Pa). When the inlet pressure detected by the pressure detection device reaches a set value (1800Pa), the air filter element 3 is indicated to be blocked, at the moment, the controller 14 controls the electromagnetic valve 12 to act, the inlet passage is opened, and compressed air is sprayed to the air filter element 3 from the inside, so that the self-cleaning of the air filter element 3 is realized. As the dust is blown off, the inlet pressure of the diesel intake pipe rises and the difference between the atmospheric pressure and the inlet pressure of the diesel intake pipe falls. If the lower limit value of the pressure drop is set to be 1500Pa, the intake pressure detection device monitors the intake pressure at any time, when the pressure drop of the intake pressure reaches the set lower limit value (1500Pa), the controller 14 stops sending the signal, the compressed air back-spraying device 5 of the air filter element 3 stops working, otherwise, the controller 14 continuously sends the signal until the pressure drop reaches the set lower limit value.
The operation of the self-cleaning filter device is described in detail below:
1. in the working process of the diesel engine, air is filtered through the air filter 2 arranged at the air inlet of the dust collection box 1, filtered sand and dust are deposited in the dust collection groove 2a at the bottom, the dust removal fan 4 is controlled to work continuously in the working process of the diesel engine, and the sand and dust filtered by the air filter 2 is discharged out of the vehicle through the dust discharge pipe 10 continuously.
2. When the device normally operates, the pressure detection device positioned at the air inlet pipe of the diesel engine detects the pressure value of the air inlet pipe.
3. When the gaps of the paper air filter element 3 are filled with sand and dust, the air inlet pressure will drop, and when the pressure detection device detects that the pressure drop reaches the set value 1800Pa, a signal is transmitted to the controller 14.
4. The controller 14 sends a signal to the electromagnetic valve 12, opens the electromagnetic valve diaphragm valve, sends a compressed air backflushing pulse, blows away sand and dust in gaps of the paper air filter element 3, and discharges the sand and dust to the outside of the vehicle through the dust removal fan 4 and the dust discharge pipe 10.
5. The diesel engine intake pressure detection device continues to monitor the intake pressure, when the intake pressure drops to reach the set lower limit value of 1500Pa, the controller 14 stops sending signals, the compressed air back-spraying device of the air filter element 3 stops working, otherwise, the controller 14 continues to send signals until the pressure drops to reach the set lower limit value.
The utility model provides a self-cleaning filter equipment for locomotive, rational in infrastructure, through setting up dust exhausting fan and compressed air back-flush device, utilize compressed air blowback air filter to realize the interior sand and dust of clean filter element, realize the sand and dust on self-cleaning dust collecting tank and the air filter element, extension filter equipment's life, and then extension filter core renewal time can avoid regular parking maintenance, reduces the maintenance cost, especially is showing in high sand area effect.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and although the present invention has been disclosed with reference to the above preferred embodiment, but not to limit the present invention, any person skilled in the art can make some changes or modifications to equivalent embodiments without departing from the scope of the present invention, and any simple modification, equivalent change and modification made to the above embodiments by the technical spirit of the present invention still fall within the scope of the present invention.
Claims (10)
1. The utility model provides a locomotive is with automatically cleaning filter equipment, includes the dust collection box, is provided with air inlet and gas outlet on the dust collection box, installs air cleaner in air inlet department, installs air filter, its characterized in that in the dust collection box: the dust removal device comprises an air inlet pipe connected with a compressed air source, an electromagnetic valve used for controlling the on-off of the air inlet pipe is installed on the air inlet pipe, an air outlet end of the air inlet pipe penetrates through a dust collection box and is connected to an air filter element, and sand blown after the reverse spraying is guided and collected into the dust collection groove.
2. A self-cleaning filter device for a locomotive according to claim 1, wherein: a plurality of air filter elements are arranged in each dust collection box, the air inlet pipe comprises a main air inlet pipe and a plurality of branch air pipes connected with the main air inlet pipe, and each air filter element is correspondingly provided with one branch air pipe.
3. A self-cleaning filter device for a locomotive according to claim 1, wherein: the electromagnetic valve adopts an electromagnetic diaphragm valve.
4. A self-cleaning filter device for a locomotive according to claim 1, wherein: the air filter element is cylindrical, and the air inlet pipe extends into the air filter element.
5. A self-cleaning filter device for a locomotive according to claim 4, wherein: the end of the air inlet pipe extends at least 2/3 times the length of the air filter element.
6. A self-cleaning filter device for a locomotive according to claim 4, wherein: be provided with a plurality of air jet on stretching into the inside intake pipe of air filter, the air jet distributes along different radial directions.
7. A self-cleaning filter device for a locomotive according to claim 1, wherein: the dust collection boxes are provided with a plurality of air filters, the air filters arranged on two adjacent dust collection boxes are oppositely arranged, the dust collection grooves at the bottoms are connected into a whole, and the dust collection grooves are connected with the dust removal fan through air pipes.
8. A self-cleaning filter device for a locomotive according to claim 1, wherein: the dust collection box is internally provided with a partition board which divides the space in the dust collection box into a first air cavity and a second air cavity which are relatively independent, an air inlet and an air filter element are arranged in the first air cavity, the outlet end of the air filter element is arranged on the partition board, the filtered air directly enters the second air cavity, and an air outlet is arranged at the bottom of the second air cavity.
9. A self-cleaning filter device for a locomotive according to claim 8, wherein: the baffle is L-shaped, the bottom plate of the baffle inclines towards the direction of the dust collecting groove on one side, and the outlet end of the air filter element is arranged on the side plate of the air filter element.
10. A self-cleaning filter device for a locomotive according to any of claims 1-9, wherein: the electromagnetic valve is connected with the controller, the controller is connected with the diesel engine air inlet pressure detection device, the pressure detection device transmits a signal to the controller when detecting that the air inlet pressure of the diesel engine reaches a set value, and the controller controls the electromagnetic valve to act.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022243206.0U CN213981004U (en) | 2020-10-10 | 2020-10-10 | Self-cleaning filtering device for locomotive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022243206.0U CN213981004U (en) | 2020-10-10 | 2020-10-10 | Self-cleaning filtering device for locomotive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213981004U true CN213981004U (en) | 2021-08-17 |
Family
ID=77255774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022243206.0U Active CN213981004U (en) | 2020-10-10 | 2020-10-10 | Self-cleaning filtering device for locomotive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213981004U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117052574A (en) * | 2023-10-11 | 2023-11-14 | 江苏星辰星汽车附件有限公司 | Multistage high-precision self-cleaning air filter |
-
2020
- 2020-10-10 CN CN202022243206.0U patent/CN213981004U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117052574A (en) * | 2023-10-11 | 2023-11-14 | 江苏星辰星汽车附件有限公司 | Multistage high-precision self-cleaning air filter |
| CN117052574B (en) * | 2023-10-11 | 2024-03-08 | 江苏星辰星汽车附件有限公司 | Multistage high-precision self-cleaning air filter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7090711B2 (en) | Multistage air cleaner including pulse cleaning system | |
| CN108310860A (en) | A kind of intelligence cleaner | |
| WO2000074818A1 (en) | Multistage air cleaner including pulse cleaning system | |
| CN209952461U (en) | Automatic deashing mechanism and smoke purifier | |
| CN213981004U (en) | Self-cleaning filtering device for locomotive | |
| CN112219025A (en) | Air supply device for supplying air to internal combustion engine | |
| CN206587519U (en) | A kind of high density bag-type dust collector | |
| KR101352617B1 (en) | Complex dust collector for cutting apparatus of printed circuit board | |
| US4740221A (en) | Air filter apparatus with modularized self-cleaning filter system | |
| CN212404972U (en) | Water-saving washing and sweeping vehicle | |
| CN201410345Y (en) | Turnover pulse dust remover of jetting system | |
| CN211777763U (en) | Dry type air filter | |
| CN108744744A (en) | One kind exempting from the online purge gas cleaner that stops | |
| CN215311228U (en) | Large-scale industrial purification filter | |
| CN212166854U (en) | Self-cleaning general filtering device | |
| CN211612017U (en) | Multi-effect purification filter screen assembly for automobile | |
| CN105727641A (en) | Self-cleaning air filter | |
| CN209752438U (en) | Combined pulse filter cartridge dust remover | |
| CN210057660U (en) | Central dust removal equipment | |
| CN208642149U (en) | Dust collection system | |
| CN212027948U (en) | Air filter for vehicle | |
| CN212680492U (en) | Be applied to dust removal filter equipment of cotton production of honeycomb | |
| CN214209758U (en) | Dust removing equipment | |
| CN219220603U (en) | Back-blowing dust-removing device for air filter | |
| CN219333502U (en) | Bag type dust collecting equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |