CN218210710U - Equipment for continuously feeding, fishing and discharging slag in vacuum environment - Google Patents
Equipment for continuously feeding, fishing and discharging slag in vacuum environment Download PDFInfo
- Publication number
- CN218210710U CN218210710U CN202222287333.XU CN202222287333U CN218210710U CN 218210710 U CN218210710 U CN 218210710U CN 202222287333 U CN202222287333 U CN 202222287333U CN 218210710 U CN218210710 U CN 218210710U
- Authority
- CN
- China
- Prior art keywords
- slag
- vacuum chamber
- charging
- sealing cover
- discharging
- 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
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Crucibles And Fluidized-Bed Furnaces (AREA)
Abstract
The application provides equipment for continuous feeding, slag salvaging and slag discharging under a vacuum environment, and relates to the field of smelting equipment. Equipment of reinforced, drag for sediment, slag tap in succession under vacuum environment includes: the vacuum chamber comprises a first vacuum chamber, a second vacuum chamber and a vacuum pumping mechanism, wherein the first vacuum chamber and the second vacuum chamber are separated by an inner vacuum chamber door, and the second vacuum chamber is provided with an outer vacuum chamber door; the first vacuum chamber is internally provided with: the melting furnace is used for melting materials; the feeding device is used for feeding materials to the melting furnace; the slag fishing device is used for fishing the slag from the melting furnace; the slag hopper is used for containing and conveying the slag; the vacuumizing mechanism is communicated with the first vacuum chamber, the second vacuum chamber and the feeding device. The application provides an equipment that feeds in succession under vacuum environment, drags for the sediment, slag tap realizes that reinforced in succession under vacuum environment, drags for the sediment, slag tap, and machining efficiency is high.
Description
Technical Field
The utility model relates to a melting equipment field especially relates to a equipment of continuous feeding, dragging for sediment, slagging tap under vacuum environment.
Background
High purity zinc generally refers to zinc having a zinc content of greater than 99.99%, which is mainly used in the preparation of compound semiconductor materials, reducing agents, the electronics industry, and the like.
High purity zinc is generally obtained by distillation processing using a zinc feedstock. High temperature operation is required during distillation and processing under vacuum is required to avoid zinc oxidation.
In the existing equipment, in the process of adding raw materials into the equipment from the outside, as the raw materials are added into a vacuum environment from the atmosphere, the processing is often suspended, after a melting furnace and feeding equipment are both in the atmosphere, the raw materials are added, and then the whole equipment is vacuumized.
In addition, the slag produced by the melting furnace also requires a pause in processing when it exits the plant.
The equipment can not realize continuous production, and needs continuous circulation of atmospheric atmosphere-vacuum environment, which leads to higher overall energy consumption of the equipment.
Therefore, a device capable of realizing continuous feeding, slag dragging and slag discharging in a vacuum environment is needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an equipment that feeds in succession under vacuum environment, drags for sediment, goes out the slag to solve above-mentioned problem.
In order to achieve the purpose, the following technical scheme is adopted in the application:
the utility model provides an equipment of reinforced, drag for sediment, slagging tap in succession under the vacuum environment, includes: the vacuum chamber comprises a first vacuum chamber, a second vacuum chamber and a vacuum pumping mechanism, wherein the first vacuum chamber and the second vacuum chamber are separated by a vacuum chamber inner door, and the second vacuum chamber is provided with a vacuum chamber outer door;
the first vacuum chamber is internally provided with:
the melting furnace is used for melting materials;
the feeding device is used for feeding materials to the melting furnace;
the slag fishing device is used for fishing the slag from the melting furnace;
the slag hopper is used for containing and conveying the slag;
the feeding device comprises an outer charging bucket, an inner charging bucket, a charging bucket moving cylinder, an upper sealing cover, a lower sealing cover, an inner sealing cover, a material moving mechanism and a material moving mechanism bracket; the outer charging barrel is arranged on the top wall of the first vacuum chamber, the inner charging barrel is sleeved inside the outer charging barrel through a rack, the fixed end of a charging barrel moving cylinder is connected with the outer charging barrel through the rack, and the moving end of the charging barrel moving cylinder is connected with the inner charging barrel; the upper sealing cover is arranged at the top end of the outer charging bucket, the lower sealing cover is arranged at the bottom end of the outer charging bucket, and the inner sealing cover is arranged at the bottom end of the inner charging bucket; the material moving mechanism support is fixed on two sides of the top of the melting furnace, and the material moving mechanism is arranged on the material moving mechanism support;
the vacuumizing mechanism is communicated with the first vacuum chamber, the second vacuum chamber and the feeding device.
Preferably, loading attachment still includes storage bucket guiding mechanism, storage bucket guiding mechanism includes storage bucket guide bar and guide ring, the guide ring cover establish on the storage bucket guide bar and with the outer wall connection of interior storage bucket, the storage bucket guide bar with the inner wall connection of outer storage bucket.
Preferably, the melting furnace and the bottom of the slag hopper are both provided with a moving mechanism.
Preferably, the slag salvaging device comprises a driving part, a slag salvaging moving guide rail, a telescopic cylinder and a slag salvaging grab bucket;
the slag salvaging grab bucket is arranged at the moving end of the telescopic cylinder, and the driving part is connected with the fixed end of the telescopic cylinder and is used for driving the telescopic cylinder and the slag salvaging grab bucket to move along the slag salvaging moving guide rail.
Preferably, the upper sealing cover, the lower sealing cover and the inner sealing cover are all provided with automatic opening and closing mechanisms.
Preferably, the melting furnace comprises a heat insulation layer and a furnace pipe, the heat insulation layer forms an accommodating space, a heating mechanism is arranged on the inner wall of the accommodating space, and the furnace pipe is arranged in the accommodating space.
Preferably, the furnace pipe is provided with a downward inclined discharging channel.
Preferably, a slag wall is arranged in the furnace pipe at a position close to the discharging channel.
Preferably, an oil pipe connected with the charging bucket moving cylinder is arranged between the outer charging bucket and the top wall.
Compared with the prior art, the beneficial effect of this application includes:
the utility model provides a reinforced in succession under vacuum environment, drag for the sediment, the equipment of slagging tap, through with the melting furnace, loading attachment, drag for the sediment device, the sediment fill sets up in first vacuum chamber, the vacuum state is continuously kept under the evacuation mechanism effect in second vacuum chamber, pass through interior storage bucket when reinforced, outer storage bucket and last sealed lid, cooperation between lower sealed lid and the interior sealed lid, let the material can add interior storage bucket earlier, then to the storage bucket evacuation back, let storage bucket move in storage bucket removal jar drive storage bucket in the outer storage bucket of vacuum environment move to lower sealed lid top again, add the material to material moving mechanism under vacuum environment on, send the material to the melting furnace by material moving mechanism again, make melting process can go on in succession, and the production efficiency is improved, the evacuation frequency and the evacuation volume have been reduced, energy consumption and manufacturing cost are reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of the continuous feeding, slag salvaging and slag discharging equipment in the vacuum environment provided by the embodiment.
Reference numerals:
1-a first vacuum chamber; 2-a second vacuum chamber; 3-vacuum chamber inner door; 4-outer door of vacuum chamber; 5-melting furnace; 6-a slag hopper; 7-an external charging bucket; 8-inner charging bucket; 9-a charging basket moving cylinder; 10-upper sealing cover; 11-lower sealing cap; 12-inner sealing cover; 13-a top wall; 14-a frame; 15-a charging basket guide bar; 16-a guide ring; 17-a material moving mechanism; 18-a material moving mechanism support; 19-a drive member; 20-dragging slag moving guide rail; 21-a telescopic cylinder; 22-a slag-salvaging grab bucket; 23-an insulating layer; 24-furnace pipe; 25-a heating mechanism; 26-a discharge channel; 27-slag wall; 28-oil pipe.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
Example 1
As shown in fig. 1, the present embodiment provides an apparatus for continuously feeding, dredging, and discharging slag in a vacuum environment, including: a first vacuum chamber 1, a second vacuum chamber 2, and a vacuum-pumping mechanism (not shown in the figure); the first vacuum chamber 1 and the second vacuum chamber 2 have two independent spaces, which are separated by the vacuum chamber inner door 3 and are communicated when the vacuum chamber inner door 3 is opened; the second vacuum chamber 2 is provided with an outer vacuum chamber door 4 and can communicate with the outside through the outer vacuum chamber door 4.
A melting furnace 5, a feeding device, a slag dragging device and a slag hopper 6 are arranged in the first vacuum chamber 1; the melting furnace 5 is used for melting the material, and loading attachment is used for 5 material loading (reinforced) to the melting furnace, drags for the sediment device and is used for dragging for the sediment from the melting furnace 5, and the sediment fill 6 is used for holding and transporting the sediment.
The feeding device comprises an outer charging bucket 7, an inner charging bucket 8, a charging bucket moving cylinder 9, an upper sealing cover 10, a lower sealing cover 11 and an inner sealing cover 12; the outer charging barrel 7 is welded on the top wall 13 of the first vacuum chamber 1 and penetrates through the top wall 13, the inner charging barrel 8 is sleeved inside the outer charging barrel 7 through a rack 14, the fixed end of a charging barrel moving cylinder 9 is connected with the outer charging barrel 7 through the rack 14, and the moving end of the charging barrel moving cylinder 9 is connected with the inner charging barrel 8; an upper sealing cover 10 is arranged at the top end of the outer charging bucket 7, a lower sealing cover 11 is arranged at the bottom end of the outer charging bucket 7, and an inner sealing cover 12 is arranged at the bottom end of the inner charging bucket 8. The vacuumizing mechanism is communicated with the first vacuum chamber 1, the second vacuum chamber 2 and the feeding device.
In order to ensure that the inner charging bucket 8 can precisely move downwards under the driving of the charging bucket moving cylinder 9, in an optional embodiment, the charging device further comprises a charging bucket guide mechanism, the charging bucket guide mechanism comprises a charging bucket guide rod 15 and a guide ring 16, the guide ring 16 is sleeved on the charging bucket guide rod 15 and is connected with the outer wall of the inner charging bucket 8, and the charging bucket guide rod 15 is connected with the inner wall of the outer charging bucket 7.
The bucket moving cylinder 9 is preferably an oil cylinder.
In order to improve the automation degree of the operation of the equipment and reduce the labor intensity, in a preferred embodiment, the equipment for continuously feeding, salvaging and deslagging in a vacuum environment further comprises a material moving mechanism 17 and a material moving mechanism bracket 18, wherein the material moving mechanism bracket 18 is fixed on two sides of the top of the melting furnace 5, and the material moving mechanism 17 is arranged on the material moving mechanism bracket 18.
Illustratively, the material moving mechanism 17 is a belt conveyor. In an alternative embodiment, the melting furnace 5 and the bottom of the slag hopper 6 are provided with moving mechanisms. It will be understood that the movement mechanism comprises a set of wheels and a mechanism for driving the set of wheels, so that the melting furnace 5, the skip 6, can be moved as desired.
In an alternative embodiment, the slag salvaging device comprises a driving part 19, a slag salvaging moving guide rail 20, a telescopic cylinder 21 and a slag salvaging grab 22; the slag grab 22 is arranged at the moving end of the telescopic cylinder 21, and the driving part 19 is connected with the fixed end of the telescopic cylinder 21 and is used for driving the telescopic cylinder 21 and the slag grab 22 to move along the slag moving guide rail 20. Optionally, the slag removing guide rail 20 is disposed on the top wall or the side wall of the first vacuum chamber 1.
The working process of the equipment for continuously feeding, fishing and discharging the slag in the vacuum environment is briefly described as follows:
before the operation, the inner door 3 and the outer door 4 of the vacuum chamber are closed, the lower seal cover 11 is opened, the inner seal cover 12 is closed, and then the first vacuum chamber 1, the melting furnace 5, and the like are evacuated.
When feeding, the upper sealing cover 10 is opened, and the raw materials are added from the upper end of the inner charging basket 8. After the addition is completed, the upper sealing cover 10 is closed, and then the inner bucket 8 is evacuated.
During the blowing, earlier with interior storage bucket 8 move down to outer storage bucket 7 inner bottom upper surface suitable position, then open interior sealed lid 12, the raw materials falls down on material moving mechanism 17 under the action of gravity, transport by material moving mechanism 17 again and send into in melting furnace 5 in 5 the melting furnace falls into melting furnace 5, then interior storage bucket 8 moves up to suitable position, closes interior sealed lid 12 at last.
When the slag is fished, the slag fishing device is translated to the upper part of the melting furnace 5 along the slag moving guide rail 20 through the driving part 19 to carry out slag fishing operation. In the slag dragging process, the slag dragging grab 22 moves up and down through the telescopic cylinder 21, moves horizontally through the slag dragging movable guide rail 20, drags slag and moves slag into the slag bucket 6. After the slag is fished, the slag grab 22 is moved to the upper part of the slag bucket 6.
When the slag hopper 6 is full (slag is discharged), the second vacuum chamber 2 is vacuumized, then the inner door 3 of the vacuum chamber is opened, and the slag hopper 6 is moved from the first vacuum chamber 1 to the second vacuum chamber 2. The inner vacuum chamber door 3 is closed, the second vacuum chamber 2 is filled with air, the outer vacuum chamber door 4 is opened, and the slag hopper 6 is removed from the second vacuum chamber 2. After emptying the slag hopper 6, the slag hopper 6 is moved into the second vacuum chamber 2, the outer door 4 of the vacuum chamber is closed, the second vacuum chamber 2 is vacuumized, the inner door 3 of the vacuum chamber is opened, the slag hopper 6 is moved into the first vacuum chamber 1, and finally the inner door 3 of the vacuum chamber is closed.
Repeating the above process can realize continuous feeding, slag salvaging and slag discharging.
Example 2
On the basis of embodiment 1, it can be understood that the upper seal cover 10, the lower seal cover 11, and the inner seal cover 12 are each provided with an automatic opening and closing mechanism. The automatic opening and closing mechanism is a conventional opening and closing mechanism and is used for driving the cover body to open and close. And sealing rings are arranged on the inner side edges of the upper sealing cover 10, the lower sealing cover 11 and the inner sealing cover 12.
In an alternative embodiment, the melting furnace 5 includes an insulating layer 23 and a furnace pipe 24, the insulating layer 23 forms an accommodating space, a heating mechanism 25 is disposed on an inner wall of the accommodating space, and the furnace pipe 24 is disposed in the accommodating space.
In a preferred embodiment, in order to ensure a smooth discharge of the melting furnace 5 into the subsequent distillation plant, the furnace shell 24 is provided with a downwardly sloping discharge channel 26.
In a preferred embodiment, a slag dam 27 is provided in the furnace shell 24 adjacent the tapping channel 26 in order to ensure the purity of the tapping.
In a preferred embodiment, in order to ensure the regularity of the installation, an oil pipe 28 connected to the barrel moving cylinder 9 is provided between the outer barrel 7 and the top wall 13. The apparatus also includes attached power supplies, controls, and like devices or components, which are not described in detail herein.
According to the equipment for continuously feeding, fishing and discharging the slag in the vacuum environment, the feeding and discharging processes can be continuously carried out, and melting in the vacuum environment is not influenced; the main working process is in a vacuum chamber, so that the vacuumizing frequency and the vacuumizing volume are reduced; the labor intensity of slag dragging is reduced.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are exemplary and should not be construed as limiting the present application and that changes, modifications, substitutions and alterations in the above embodiments may be made by those of ordinary skill in the art within the scope of the present application.
Claims (9)
1. The utility model provides an equipment of reinforced, drag for sediment, slag tap in succession under vacuum environment which characterized in that includes: the vacuum chamber comprises a first vacuum chamber, a second vacuum chamber and a vacuum pumping mechanism, wherein the first vacuum chamber and the second vacuum chamber are separated by a vacuum chamber inner door, and the second vacuum chamber is provided with a vacuum chamber outer door;
the first vacuum chamber is internally provided with:
the melting furnace is used for melting materials;
the feeding device is used for feeding materials to the melting furnace;
the slag fishing device is used for fishing the slag from the melting furnace;
the slag hopper is used for containing and conveying the slag;
the feeding device comprises an outer charging bucket, an inner charging bucket, a charging bucket moving cylinder, an upper sealing cover, a lower sealing cover, an inner sealing cover, a material moving mechanism and a material moving mechanism bracket; the outer charging barrel is arranged on the top wall of the first vacuum chamber, the inner charging barrel is sleeved inside the outer charging barrel through a rack, the fixed end of a charging barrel moving cylinder is connected with the outer charging barrel through the rack, and the moving end of the charging barrel moving cylinder is connected with the inner charging barrel; the upper sealing cover is arranged at the top end of the outer charging bucket, the lower sealing cover is arranged at the bottom end of the outer charging bucket, and the inner sealing cover is arranged at the bottom end of the inner charging bucket; the material moving mechanism support is fixed on two sides of the top of the melting furnace, and the material moving mechanism is arranged on the material moving mechanism support;
the vacuumizing mechanism is communicated with the first vacuum chamber, the second vacuum chamber and the feeding device.
2. The apparatus for continuous charging, slag removing and discharging under vacuum environment as claimed in claim 1, wherein the charging device further comprises a charging basket guiding mechanism, the charging basket guiding mechanism comprises a charging basket guiding rod and a guiding ring, the guiding ring is sleeved on the charging basket guiding rod and connected with the outer wall of the inner charging basket, and the charging basket guiding rod is connected with the inner wall of the outer charging basket.
3. The apparatus for continuously charging, salvaging and discharging slag under the vacuum environment as claimed in claim 1, wherein the melting furnace and the bottom of the slag hopper are provided with moving mechanisms.
4. The apparatus for continuously charging, dredging slag and discharging slag under vacuum environment according to claim 1, wherein the dredging slag device comprises a driving part, a dredging slag moving guide rail, a telescopic cylinder and a dredging slag grab bucket;
the slag salvaging grab bucket is arranged at the moving end of the telescopic cylinder, and the driving part is connected with the fixed end of the telescopic cylinder and is used for driving the telescopic cylinder and the slag salvaging grab bucket to move along the slag salvaging moving guide rail.
5. The apparatus for continuously charging, salvaging and discharging slag under vacuum environment as claimed in claim 1, wherein said upper sealing cover, said lower sealing cover and said inner sealing cover are all provided with automatic opening and closing mechanisms.
6. The apparatus for continuously charging, salvaging and discharging slag under vacuum environment as claimed in claim 1, wherein said melting furnace comprises a heat insulating layer and a furnace pipe, said heat insulating layer forms an accommodating space, a heating mechanism is arranged on the inner wall of said accommodating space, and said furnace pipe is arranged in said accommodating space.
7. The apparatus for continuous charging, slag removing and slag discharging in vacuum environment as claimed in claim 6, wherein the furnace is provided with a downward-inclined discharging channel.
8. The apparatus for continuous charging, slag salvaging and slag discharging under the vacuum environment as claimed in claim 7, wherein a slag blocking wall is arranged in the furnace pipe at a position adjacent to the discharging channel.
9. The apparatus for continuous charging, slag removing and slag discharging in a vacuum environment according to any one of claims 1 to 8, wherein an oil pipe connected to the moving cylinder of the charging basket is provided between the outer charging basket and the top wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222287333.XU CN218210710U (en) | 2022-08-29 | 2022-08-29 | Equipment for continuously feeding, fishing and discharging slag in vacuum environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222287333.XU CN218210710U (en) | 2022-08-29 | 2022-08-29 | Equipment for continuously feeding, fishing and discharging slag in vacuum environment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218210710U true CN218210710U (en) | 2023-01-03 |
Family
ID=84660782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222287333.XU Active CN218210710U (en) | 2022-08-29 | 2022-08-29 | Equipment for continuously feeding, fishing and discharging slag in vacuum environment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218210710U (en) |
-
2022
- 2022-08-29 CN CN202222287333.XU patent/CN218210710U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103925791B (en) | A kind of vacuum furnace | |
| CN113584573B (en) | External impurity-absorbing feeding method for single crystal furnace | |
| CN218210710U (en) | Equipment for continuously feeding, fishing and discharging slag in vacuum environment | |
| CN103484898B (en) | A kind of vacuum high-temperature continuous electrolysis furnace system and electrolysis process | |
| CN113736996B (en) | Method and device for intermittently and continuously smelting crystallized magnesium in Pidgeon reduction tank | |
| CN209210716U (en) | A kind of rotary microwave pyrolysis installation | |
| CN206387257U (en) | A kind of secondary charging device of vacuum melting furnace | |
| CN216432480U (en) | Feeding device of vacuum electron beam furnace | |
| CN214088244U (en) | Environment-friendly smelting device convenient for dust removal | |
| CN212237638U (en) | Crystal material crushing and cleaning pretreatment device | |
| CN214779423U (en) | Reusable zinc impregnation furnace burden negative pressure discharging device | |
| US4392919A (en) | Charging apparatus for coke cooling chambers | |
| CN212741436U (en) | Vertical high vacuum heat treatment furnace | |
| CN111420779B (en) | Crystal material crushing and cleaning pretreatment device and method | |
| WO1996030549A1 (en) | Apparatus and method for recovering non-ferrous metals from hot dross | |
| CN211921666U (en) | System for continuous magnesium smelting by induction heating liquid state stirring | |
| CN206298345U (en) | Alembic overflow mechanism | |
| US4274785A (en) | Method and apparatus for charging anode scraps to a converter furnace | |
| CN210237536U (en) | Coke dry quenching coke loading system | |
| CN210736653U (en) | Novel sealed clean type pyrolysis furnace feeding device | |
| CN113280624A (en) | Amorphous alloy induction heating smelting feeding mechanism and feeding method | |
| CN210663881U (en) | Vacuum induction furnace | |
| US4376602A (en) | Method and equipment for removing packing coke from baking chambers for carbon bodies | |
| CN207435580U (en) | A kind of material delivery system and crystal growth system | |
| CN217715905U (en) | Matched feeding chamber of industrial silicon smelting furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |