CN211651237U - Pouring device for electric arc furnace - Google Patents
Pouring device for electric arc furnace Download PDFInfo
- Publication number
- CN211651237U CN211651237U CN202020070603.XU CN202020070603U CN211651237U CN 211651237 U CN211651237 U CN 211651237U CN 202020070603 U CN202020070603 U CN 202020070603U CN 211651237 U CN211651237 U CN 211651237U
- Authority
- CN
- China
- Prior art keywords
- furnace body
- furnace
- electric arc
- driven gear
- gear
- 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
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
The utility model relates to an electric arc furnace's technical field, concretely relates to electric arc furnace is with pouring device, include: the furnace comprises a furnace body, wherein a molten pool suitable for containing molten steel is formed at the inner bottom of the furnace body; the furnace body is arranged at the bottom of the furnace body, the driving mechanism is arranged at the swinging center of the swinging mechanism and is suitable for continuously moving in the same direction and pushing the swinging mechanism to swing through the intermediate gear, namely the furnace body inclines or stands along with the swinging mechanism; the steel-tapping hole that is located the molten bath top is seted up to the lateral wall of furnace body to pour out the molten steel when making the furnace body empty, this kind of mode realizes that the furnace body empties, has shortened the time that installation and debugging in earlier stage spent, and the installation is simple, convenient operation, and actuating mechanism only needs continuous operation just simultaneously, need not consider actuating mechanism's operating time and actuating mechanism's direction of work problem, and then for pouring out the molten steel in the furnace body and provide convenience.
Description
Technical Field
The utility model relates to an electric arc furnace's technical field, concretely relates to electric arc furnace is with pouring device.
Background
Chinese patent CN201920253405.4 is an arc furnace for producing 304 stainless steel with slag discharging and automatic discharging, comprising a metal cantilever beam arm and a rotary base, wherein the metal cantilever beam arm is fixed on the upper end position of the rotary base, a furnace door fixer consisting of a furnace door plate, a door plate fixing groove and an inclined slag discharging plate is more compact when being closed, the door plate fixing groove of the furnace door fixer is welded and connected on the outer side of a slag outlet of an arc furnace body, thus the furnace door fixing groove is not easy to fall off when in use and is convenient for discharging internal slag, the door plate fixing groove between the inclined slag discharging plate and the furnace door plate can well fix the door plate of a furnace door closing mechanism, thus the door plate is more compact when being closed, thereby the heat at the hole of the furnace door plate is not easy to lose, thus being more convenient when smelting ores and metals, and when discharging slag, the inclined funnel state of the inclined slag discharging plate is realized through the inclined plane, therefore, the slag discharging device is more convenient to use when slag discharging is carried out.
Wherein, this kind of electric arc furnace places the platform through hydraulic lifting cylinder drive cradle and sways along the cradle track and drive the electric arc furnace and empty, such mode is when the installation, the volume of stretching out and the stretching out time that need accurate regulation and control hydraulic lifting cylinder, spend a large amount of installation debug time, and simultaneously, its implementation process relies on a whole set of control algorithm to control, if long-time operation in-process procedure mistake appears, can lead to hydraulic lifting cylinder out of control, and cause the electric arc furnace to empty the phenomenon out of control, therefore, it is very necessary to design an electric arc furnace with device of empting.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: in order to solve the problems in the prior art. The utility model provides an electric arc furnace solves above-mentioned problem with empting the device.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides an electric arc furnace is with device of empting, include: the furnace comprises a furnace body, wherein a molten pool suitable for containing molten steel is formed at the inner bottom of the furnace body; the furnace body is arranged at the bottom of the furnace body, the driving mechanism is arranged at the swinging center of the swinging mechanism and is suitable for continuously moving in the same direction and pushing the swinging mechanism to swing through the intermediate gear, namely the furnace body inclines or stands along with the swinging mechanism; and a steel outlet positioned above the molten pool is formed in the side wall of the furnace body, so that molten steel is poured out when the furnace body is toppled over.
Further, the drive mechanism includes: the driving mechanism comprises a driving motor, a driving gear, a first driven gear and a second driven gear which are positioned on two sides of the driving gear and are respectively meshed with the driving gear, and a rack with two ends respectively rotatably connected with the first driven gear and the second driven gear; the driving motor is suitable for driving the first driven gear and the second driven gear to rotate in the same direction through the driving gear so as to drive the rack to move along the kidney-shaped track; the middle gear is meshed with the rack and is positioned between the first driven gear and the second driven gear; and the intermediate gear is suitable for alternately rotating along with the rack in the forward and reverse directions so that the swinging mechanism drives the furnace body to topple or stand.
Furthermore, two ends of the rack positioned on the back surface are respectively provided with a rotating shaft fixed with the rack; the other end of the rotating shaft is provided with a rotating block; a first rotating groove matched with a rotating block of the first driven gear is formed in one side end face of the first driven gear; and a second rotating groove matched with the other rotating block is formed in the end face, located on the same side, of the second driven gear.
Furthermore, the straight line where the first rotating groove and the second rotating groove are located is a horizontal line; the first rotating groove is positioned close to the driving gear; the second rotating groove is located at a position far away from the driving gear.
Further, the rocking mechanism includes: the furnace body comprises a supporting frame fixed at the bottom of the furnace body, a swinging base positioned below the supporting frame and a swinging groove arranged on a fixed seat; wherein the swing base is connected to the central axis of the intermediate gear through a connecting rod; the bottom of the swing base is arc-shaped; the swing base is suitable for rotating around the central axis of the intermediate gear in a forward and reverse reciprocating mode along with the intermediate gear, so that the furnace body on the supporting frame can be toppled or erected.
Furthermore, an arc-shaped guide plate is arranged at the position of the furnace body at the steel tapping hole so as to guide the molten steel into the steel ladle.
Furthermore, the angle between the guide plate and the furnace body is 50-70 degrees so as to prevent the molten steel from overflowing from the steel tapping hole.
Furthermore, a furnace cover is arranged above the furnace body, and a graphite electrode extending to the upper part of the molten pool is inserted into the furnace cover to generate electric arc.
Furthermore, a furnace door is arranged on one side of the side wall of the furnace body, which is far away from the steel tapping hole, so that furnace slag in the furnace body can be taken out.
The beneficial effects of the utility model are that, the utility model provides an electric arc furnace is with device of falling, include: the furnace comprises a furnace body, wherein a molten pool suitable for containing molten steel is formed at the inner bottom of the furnace body; the furnace body is arranged at the bottom of the furnace body, the driving mechanism is arranged at the swinging center of the swinging mechanism and is suitable for continuously moving in the same direction and pushing the swinging mechanism to swing through the intermediate gear, namely the furnace body inclines or stands along with the swinging mechanism; the steel-tapping hole that is located the molten bath top is seted up to the lateral wall of furnace body to pour out the molten steel when making the furnace body empty, this kind of mode realizes that the furnace body empties, has shortened the time that installation and debugging in earlier stage spent, and the installation is simple, convenient operation, and actuating mechanism only needs continuous operation just simultaneously, need not consider actuating mechanism's operating time and actuating mechanism's direction of work problem, and then for pouring out the molten steel in the furnace body and provide convenience.
Drawings
The present invention will be further explained with reference to the drawings and examples.
FIG. 1 is a first perspective view of a preferred embodiment of a tilting device for an electric arc furnace according to the present invention;
FIG. 2 is a second perspective view of the preferred embodiment of the tilting device for electric arc furnace of the present invention;
FIG. 3 is a front view of the first half of the movement of the rack engaged with the intermediate gear;
fig. 4 is a front view of the lower half of the movement of the rack engaged with the intermediate gear of the present invention;
fig. 5 is a top view of the upper half of the movement of the rack engaged with the intermediate gear of the present invention;
fig. 6 is a top view of the lower half of the movement of the rack engaged with the intermediate gear of the present invention;
fig. 7 is a partially enlarged view of a portion a in fig. 1.
In the drawings
A furnace body 1, a molten pool 11 and a steel tapping hole 12;
the swing mechanism 2, a support frame 21, a swing base 22, a fixed seat 23, a swing groove 24 and a connecting rod 25;
the driving mechanism 3, the driving motor 31, the driving gear 32, the first driven gear 33, the second driven gear 34, the rack 35, the rotating shaft 36, the rotating block 37, the first rotating groove 38 and the second rotating groove 39;
an intermediate gear 4;
a deflector 5;
a furnace cover 6;
a graphite electrode 7;
a furnace door 8.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like 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 invention, and should not be construed as limiting the present invention. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used only for convenience in describing and simplifying the present invention, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
FIG. 1 is a first perspective view of a preferred embodiment of a tilting device for an electric arc furnace according to the present invention;
fig. 2 is a second perspective view of a preferred embodiment of the tilting device for the electric arc furnace according to the present invention.
As shown in fig. 1 and 2, the present invention provides a tilting device for an electric arc furnace, comprising: the furnace comprises a furnace body 1, wherein a molten pool 11 suitable for containing molten steel is formed at the inner bottom of the furnace body 1; the furnace body is characterized by comprising a swinging mechanism 2, a driving mechanism 3 and a driving mechanism 2, wherein the swinging mechanism 2 is arranged at the bottom of the furnace body 1, the driving mechanism 3 is arranged at the swinging center of the swinging mechanism 2, and the driving mechanism 3 is suitable for continuously moving in the same direction and pushing the swinging mechanism 2 to swing through an intermediate gear 4, namely the furnace body 1 inclines or stands along with the swinging mechanism 2; tapping hole 12 that is located molten bath 11 top is seted up to the lateral wall of furnace body 1 to pour the molten steel when making furnace body 1 empty, furnace body 1 is realized empting to this kind of mode, has shortened the time that earlier stage installation and debugging took, and the installation is simple, convenient operation, and actuating mechanism 3 only needs continuous operation just simultaneously, need not consider actuating mechanism 3's operating time and actuating mechanism 3's direction of work problem, and then for pouring the molten steel in the furnace body 1 and provide convenience.
FIG. 3 is a front view of the first half of the movement of the rack engaged with the intermediate gear;
fig. 4 is a front view of the lower half of the movement of the rack engaged with the intermediate gear of the present invention;
fig. 5 is a top view of the upper half of the movement of the rack engaged with the intermediate gear of the present invention;
fig. 6 is a top view of the lower half of the movement of the rack engaged with the intermediate gear of the present invention;
as shown in fig. 3 to 6, as an alternative embodiment of the driving mechanism 3, the driving mechanism 3 includes: the driving device comprises a driving motor 31, a driving gear 32, a first driven gear 33 and a second driven gear 34 which are positioned at two sides of the driving gear 32 and respectively meshed with the driving gear 32, and a rack 35 of which two ends are respectively rotatably connected with the first driven gear 33 and the second driven gear 34, wherein the driving gear 32 simultaneously provides driving force for the first driven gear 33 and the second driven gear 34; the driving motor 31 is adapted to drive the first driven gear 33 and the second driven gear 34 to rotate in the same direction through the driving gear 32, so as to drive the rack 35 to move along the kidney-shaped track; the intermediate gear 4 is meshed with the rack 35, the intermediate gear 4 is positioned between the first driven gear 33 and the second driven gear 34, and the waist-shaped track movement of the rack 35 provides the rotation driving force of the intermediate gear 4; and the intermediate gear 4 is suitable for alternately rotating in the forward direction and the reverse direction along with the rack 35, so that the furnace body 1 is driven to topple or stand by the swing mechanism 2, specifically, the intermediate gear 4 rotates in the forward direction by a certain angle in the upper half circle of the movement of the rack 35, and the intermediate gear 4 rotates in the reverse direction by the same angle in the lower half circle of the movement of the rack 35, so that the alternate forward rotation and the reverse rotation of the intermediate gear 4 is realized to drive the swing mechanism 2 to swing, and the swing mechanism 2 swings to drive the furnace body 1 to topple or stand.
In this embodiment, if the driving motor 31 is out of control, when the positive rotation and the negative rotation of the driving motor cannot be determined, the positive rotation and the negative rotation of the intermediate gear 4 can also be alternatively rotated, which cannot be achieved when the hydraulic cylinder is used, so that the controllability of the pouring furnace body 1 is improved, and the phenomenon that the life safety of workers is damaged due to the outflow of molten steel in the furnace body 1 when the furnace body is accidentally poured is avoided.
Fig. 7 is a partially enlarged view of a portion a in fig. 1.
As shown in fig. 1 and 7, alternatively, in order to adapt to the relative rotation generated at the joint of the rack 35 and the first driven gear 33 and the second driven gear 34 when the rack 35 moves along the kidney-shaped track, the two ends of the rack 35 at the back side are respectively provided with a rotating shaft 36 fixed with the rack 35; the other end of the rotating shaft 36 is provided with a rotating block 37; a first rotating groove 38 matched with a rotating block 37 of the first driven gear 33 is formed in one side end face of the first driven gear; a second rotating groove 39 adapted to another rotating block 37 is formed in the same side end face of the second driven gear 34, specifically, the rotating block 37 rotates in the first rotating groove 38 to adapt to the relative rotation of the joint of the rack 35 and the first driven gear 33, and the rotating block 37 rotates in the second rotating groove 39 to adapt to the relative rotation between the rack 35 and the second driven gear 34, so as to avoid the situation that the driving mechanism 3 is locked.
Preferably, in order to realize the kidney-shaped track of the rack 35, the straight line of the first rotating groove 38 and the second rotating groove 39 is a horizontal line; the first rotation groove 38 is located close to the driving gear 32; the second rotating groove 39 is located at a position far away from the driving gear 32, and then two ends of the rack 35 are driven by the first driven gear 33 and the second driven gear 34 to move synchronously, and under the limitation of the installation position of the rack 35, the rack 35 is waist-shaped along with the moving tracks of the first driven gear 33 and the second driven gear 34.
As an alternative embodiment of the rocking mechanism 2, the rocking mechanism 2 comprises: the furnace body 1 is characterized by comprising a support frame 21 fixed at the bottom of the furnace body 1, wherein an arc-shaped groove formed in the upper end of the support frame 21 is just matched with the bottom of the furnace body 1, specifically, the support frame 21 is supported at the bottom of the molten pool 11, the support frame 21 has a fixing effect on the furnace body 1, a swinging base 22 positioned below the support frame 21 and a swinging groove 24 arranged on a fixed seat 23 provide a tilting space for the furnace body 1 through the rotation of the swinging base 22 in the swinging groove 24, and the situation that the swinging base 22 moves laterally in the swinging process is avoided; wherein the swing base 22 is connected to the central axis of the intermediate gear 4 by a link 25; the bottom of the swinging base 22 is arc-shaped; the swing base 22 is suitable for reciprocating forward and backward rotation around the central axis of the intermediate gear 4 along with the intermediate gear 4, so that the furnace body 1 on the support frame 21 is inclined or erected, and then molten steel is poured out.
Preferably, it should be noted that the molten steel flowing out from the steel outlet 12 flows down along the outer wall of the furnace body 1, thereby causing the molten steel leakage, in order to solve the above problems, the following scheme is adopted: the arc-shaped guide plate 5 is arranged at the position, located at the steel tapping hole 12, of the furnace body 1, so that molten steel is guided into a steel ladle, and then the molten steel can directly fall into the steel ladle under the action of inertia after generating a certain flow velocity along the guide plate 5, and the situation that the molten steel flows down along the guide plate 5 is avoided.
Preferably, in order to solve the above problem, it is required to adopt a scheme that when the molten steel in the molten bath 11 is excessive, the molten steel directly flows out from the steel outlet 12 to cause leakage, an angle between the guide plate 5 and the furnace body 1 is preferably 60 ° to prevent the molten steel from overflowing from the steel outlet 12, and the molten steel is also prevented by the inclined guide plate 5 after overflowing from the steel outlet 12 and slides down under the guide of the guide plate 5 to avoid leakage of the molten steel.
Optionally, a furnace cover 6 is arranged above the furnace body 1, and a graphite electrode 7 extending to the upper side of the molten pool 11 is inserted into the furnace cover 6 to generate electric arc to melt the molten steel.
Optionally, a furnace door 8 is arranged on one side of the side wall of the furnace body 1 away from the steel tapping hole 12, so as to tap off slag in the furnace body 1.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 invention. In this specification, a schematic representation of the term does not necessarily 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.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (9)
1. The pouring device for the electric arc furnace is characterized by comprising:
the furnace comprises a furnace body, wherein a molten pool suitable for containing molten steel is formed at the inner bottom of the furnace body;
the swinging mechanism is arranged at the bottom of the furnace body,
the driving mechanism is arranged at the swinging center of the swinging mechanism and is suitable for continuously moving in the same direction and pushing the swinging mechanism to swing through the intermediate gear, namely the furnace body inclines or rises along with the swinging mechanism;
and a steel outlet positioned above the molten pool is formed in the side wall of the furnace body, so that molten steel is poured out when the furnace body is toppled over.
2. The tilting device for electric arc furnaces as claimed in claim 1,
the drive mechanism includes: the driving mechanism comprises a driving motor, a driving gear, a first driven gear and a second driven gear which are positioned on two sides of the driving gear and are respectively meshed with the driving gear, and a rack with two ends respectively rotatably connected with the first driven gear and the second driven gear; wherein
The driving motor is suitable for driving the first driven gear and the second driven gear to rotate in the same direction through the driving gear so as to drive the rack to move along the kidney-shaped track;
the middle gear is meshed with the rack and is positioned between the first driven gear and the second driven gear; and
the intermediate gear is suitable for alternately rotating along with the rack in the forward and reverse directions, so that the swinging mechanism drives the furnace body to topple or stand.
3. The tilting device for electric arc furnaces as claimed in claim 2,
two ends of the rack positioned on the back surface are respectively provided with a rotating shaft fixed with the rack;
the other end of the rotating shaft is provided with a rotating block;
a first rotating groove matched with a rotating block of the first driven gear is formed in one side end face of the first driven gear;
and a second rotating groove matched with the other rotating block is formed in the end face, located on the same side, of the second driven gear.
4. The tilting device for electric arc furnaces as claimed in claim 3,
the straight line where the first rotating groove and the second rotating groove are located is a horizontal line;
the first rotating groove is positioned close to the driving gear;
the second rotating groove is located at a position far away from the driving gear.
5. The tilting device for electric arc furnaces as claimed in claim 1,
the rocking mechanism includes: the furnace body comprises a supporting frame fixed at the bottom of the furnace body, a swinging base positioned below the supporting frame and a swinging groove arranged on a fixed seat; wherein
The swing base is connected to the central axis of the intermediate gear through a connecting rod;
the bottom of the swing base is arc-shaped;
the swing base is suitable for rotating around the central axis of the intermediate gear in a forward and reverse reciprocating mode along with the intermediate gear, so that the furnace body on the supporting frame can be toppled or erected.
6. The tilting device for electric arc furnaces as claimed in claim 1,
an arc-shaped guide plate is arranged at the position of the furnace body, which is positioned at the steel tapping hole, so as to guide the molten steel into the steel ladle.
7. The tilting device for electric arc furnaces as claimed in claim 6,
the angle between the guide plate and the furnace body is 50-70 degrees so as to prevent molten steel from overflowing from the steel tapping hole.
8. The tilting device for electric arc furnaces as claimed in claim 1,
a furnace cover is arranged above the furnace body, and a graphite electrode extending to the upper part of the molten pool is inserted into the furnace cover to generate electric arc.
9. The tilting device for electric arc furnaces as claimed in claim 1,
and a furnace door is arranged on one side of the side wall of the furnace body, which is far away from the steel tapping hole, so as to take out the furnace slag in the furnace body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020070603.XU CN211651237U (en) | 2020-01-13 | 2020-01-13 | Pouring device for electric arc furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020070603.XU CN211651237U (en) | 2020-01-13 | 2020-01-13 | Pouring device for electric arc furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211651237U true CN211651237U (en) | 2020-10-09 |
Family
ID=72705269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020070603.XU Active CN211651237U (en) | 2020-01-13 | 2020-01-13 | Pouring device for electric arc furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211651237U (en) |
-
2020
- 2020-01-13 CN CN202020070603.XU patent/CN211651237U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101529191A (en) | Furnace, in particular arc furnace | |
| JPH06190541A (en) | Method for controlling movement of a pouring ladle, pouring device and use of the device | |
| CN211651237U (en) | Pouring device for electric arc furnace | |
| JP3079018B2 (en) | Automatic pouring method and device | |
| CN110628984B (en) | An electric arc furnace sand filling device | |
| KR100805706B1 (en) | Furnace Rotating Melting Furnace | |
| CN217913418U (en) | Cantilever upright post for laser welding machine | |
| JP2003501611A (en) | Method and apparatus for tilting and emptying a melting vessel for metallurgy | |
| CN216619064U (en) | Molten pool monitoring sensor based on high-definition industrial camera | |
| CN209210902U (en) | Turn over packet platform lock bag apparatus | |
| CN218157000U (en) | A liquid steel sampling tool for intermediate frequency furnace | |
| CN116907203A (en) | Intelligent electric arc furnace for combined smelting and application method thereof | |
| CN222317639U (en) | Hot slag DC arc furnace | |
| CN218109339U (en) | Collecting frame for dumping metal ingot casting furnace | |
| CN211005471U (en) | Electric arc furnace sand filling device | |
| JP3971099B2 (en) | Casting water heater | |
| CN216953996U (en) | Eccentric bottom tapping electric arc furnace | |
| CN216838033U (en) | High-efficiency treatment device for titanium slag smelting by-product molten iron | |
| CN222036799U (en) | Continuous casting machine sand drainage device | |
| CN109338121A (en) | Bag turning platform lock device | |
| CN222726997U (en) | Assembled concrete guiding device | |
| KR102438964B1 (en) | oar tilting device | |
| CN212945413U (en) | Intelligent fixed-point pouring equipment | |
| CN111842871A (en) | A drainage sand pick-up machine | |
| CN223460793U (en) | A tilting mechanism for an electric arc furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |