CN201744661U - Granulating and casting room for jewelry alloy - Google Patents
Granulating and casting room for jewelry alloy Download PDFInfo
- Publication number
- CN201744661U CN201744661U CN2010202118397U CN201020211839U CN201744661U CN 201744661 U CN201744661 U CN 201744661U CN 2010202118397 U CN2010202118397 U CN 2010202118397U CN 201020211839 U CN201020211839 U CN 201020211839U CN 201744661 U CN201744661 U CN 201744661U
- Authority
- CN
- China
- Prior art keywords
- crucible
- stainless steel
- graphite
- stopper rod
- bell
- 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.)
- Expired - Fee Related
Links
Images
Abstract
The utility model relates to a granulating and casting room for jewelry alloy, belonging to the field of an alloy smelting furnace. The granulating and casting room consists of a power supply cabinet, a stainless steel chamber, a furnace cover lifting cylinder, a stainless steel furnace cover, an observation window, a cooling water circuit, a locker, a stopper rod lifting cylinder and an argon gas flow meter; the stainless steel chamber is fixed on the power supply cabinet; the furnace cover lifting cylinder is arranged on the power supply cabinet; the stainless steel furnace cover is arranged on the lifting rotary shaft of the furnace cover lifting cylinder; an inductance coil is sheathed on a crucible; the stopper rod lifting cylinder is connected with a lifting rod and is arranged in the crucible; the crucible consists of a porcelain crucible and a carbon crucible; the carbon crucible is arranged in the porcelain crucible and consists of a carbon crucible body and a carbon orifice block; and the carbon orifice block is connected on the carbon crucible body by screw thread and is equipped with a plurality of tapping holes. The granulating and casting room for the jewelry alloy has compact structure, simple and convenient operation, long service life, rapid and convenient replacement for easily-consumed elements and low cost and can be used for making the particles of jewelry alloy materials such as gold, silver and copper.
Description
Technical field
The utility model jewellery alloy granulation founding chamber belongs to alloy smelting furnace field.
Prior art
The composition that the alloying pellet of profile rounding, moderate dimensions helps fusion process evenly, temperature control, loss control etc., produce such particle, must design suitable granulating device and guarantee.To be metal liquid stream flow out from the crucible outlet granulation of molten metal, splashes in the cooling water moment Quench and split into drop, solidifies the process that the back forms the solid metal particle.The supply of business-like granulation machine is arranged in the market; but there are some problems in the structure of founding chamber; the grain effect of creating is bad; have plenty of that oxidation has taken place metal in granulation process; it is inhomogeneous to have plenty of the metallic particles particle diameter; perhaps in metallic particles, produced pore; this all will influence the casting effect of alloying pellet; in the jewellery alloy granulation; there is appreciable impact in the founding chamber to the granulation effect, and the continuity of production process is impacted, especially when being poured into the later stage; the crucible inner metal liquid is not for a long time; because the crucible orifice is small-sized, poring rate reduces, and influences the granulation effect; and take place easily to stop up and the damage orifice, cause whole crucible not re-use.
The utility model content
The purpose of this utility model is to avoid the deficiencies in the prior art part, and provide a kind of and can obtain to pour into a mould fully, granulation is effective, prolong the jewellery alloy granulation founding chamber of pot life.
The purpose of this utility model reaches by following measure; jewellery alloy granulation founding chamber comprises by power cabinet; the stainless steel cavity; the furnace cover lifting cylinder; the stainless steel bell; observation window; the chilled(cooling) water return (CWR); control panel; locker; vacuum meter; the stopper rod lift cylinder; the argon flow amount meter is formed; the stainless steel cavity is fixed on the power cabinet; the furnace cover lifting cylinder is installed on the power cabinet; the stainless steel bell is installed on the lift shaft of furnace cover lifting cylinder; in stainless steel bell the place ahead observation window is set, is provided with cooling-water duct in the stainless steel bell, stainless steel cavity and bell are locked by locker; control panel is installed on power cabinet; vacuum meter is installed on power cabinet, and the stopper rod lift cylinder is fixed on the power cabinet, and induction coil is enclosed within on the crucible; the stopper rod lift cylinder connects elevating lever; stopper rod is installed in the crucible, and crucible is by ceramic crucible, and graphite crucible constitutes; graphite crucible is placed in the ceramic crucible; ceramic crucible is placed on the end refractory brick, and induction coil is enclosed within on the crucible, and graphite crucible is made of graphite crucible body and graphite orifice piece; graphite orifice piece is by being threaded on one's body the graphite crucible; the bottom of graphite orifice piece is a circle drum platform shape, on the graphite orifice piece a plurality of tap holes is arranged, the up-small and down-big shape of tap hole.
Stopper rod is by the graphite stopper rod, stopper rod head, graphite nut, clamper, elevating lever, thermocouple constitutes, and the stopper rod head is done coning, the circular cone side tightly cooperates with orifice piece end face, graphite stopper rod and stopper rod head are by being threaded, and the graphite nut is connected on the graphite stopper rod, and graphite nut and clamper are fixed, clamper is connected on the elevating lever, and thermocouple is packed in the graphite stopper rod.
The stainless steel cavity is by the stainless steel cavity wall, asbestos wool, asbestos board, refractory slab, refractory brick, induction coil, vacuum nozzle, argon gas ozzle and sealing ring constitute, and the stainless steel cavity wall is by front panel, squab panel, left side wallboard, right wallboard and base plate are formed, and induction coil places stainless steel cavity central authorities, filled stone velveteen and asbestos board between induction coil and stainless steel cavity wall, between induction coil and base plate, place refractory slab and refractory brick, the end face of stainless steel cavity wall is provided with groove, and sealing ring is installed in groove, and vacuum nozzle and argon gas ozzle are installed in the stainless steel cavity.
The stainless steel bell is by bell, lift cylinder, lift shaft, the rotating shaft tube, locker, observation window, asbestos wool, refractory brick, cooling water pipe constitutes, it is three-dimensional trapezoidal that bell becomes, bell inwall lining stone velveteen and refractory brick, the embedded chilled(cooling) water return (CWR) of bell links to each other with outlet with the cooling water inlet, the rotating shaft tube is fixed on the power cabinet, bell is installed on the rotating shaft tube, and lift shaft is installed on the rotating shaft tube, and lift shaft connects lift cylinder, the bell front center is offered observation window, safety glass is installed on observation window, and safety glass is installed on the glass seat, and glass cover is installed on the safety glass, the observation window next door is established and is observed the door lever, and hot baffle is installed in the safety glass lower surface.
The utility model compact conformation, easy and simple to handle, long service life; the replacing attrition component is quick and convenient; the founding cost is low, can be used to make the particle of jewellery alloy materials such as gold, silver, copper, and the molten metal oxidization burning loss of melting is few; composition is uniform and stable; the metallic particles non-oxidation is mingled with, and molten metal can be poured into a mould fully, metallic particles rounding after the granulation; epigranular, granulation is effective.
Description of drawings
Accompanying drawing 1 is a whole assembling schematic diagram of the present utility model.
Accompanying drawing 2a is a cavity body structure schematic diagram of the present utility model.
Accompanying drawing 2b is a cavity body structure schematic diagram of the present utility model.
Accompanying drawing 3a is a bell structural representation of the present utility model.
Accompanying drawing 3b is a bell structural representation of the present utility model.
Accompanying drawing 4a is a crucible structural representation of the present utility model.
Accompanying drawing 4b is a crucible structural representation of the present utility model
Accompanying drawing 5a is a stopper rod structural representation of the present utility model.
Accompanying drawing 5b is a stopper rod structural representation of the present utility model.
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
Among the figure: power cabinet 1, stainless steel cavity 2, furnace cover lifting cylinder 3, stainless steel bell 4, observation window 5, chilled(cooling) water return (CWR) 6, control panel 7, locker 8, vacuum meter 9, stopper rod lift cylinder 10, argon flow amount meter 11, front panel 12, left side wallboard 13, left asbestos wool 14, squab panel 15, argon gas ozzle 16, vacuum nozzle 17, back asbestos wool 18, back asbestos board 19, sealing ring 20, stopper rod 21, right asbestos wool 22, graphite crucible 23, ceramic crucible 24, right wallboard 25, right asbestos wool 26, induction coil 27, end refractory brick 28, preceding asbestos wool 29, end refractory slab 30, base plate 31, asbestos wool 32, refractory brick 33, lift shaft 34, rotating shaft tube 35, cooling water inlet 36, coolant outlet 37, locker fixture 38, hot baffle 39, glass base 40, safety glass 41, glass cover 42, screw 43, hot baffle lever 44, observe door lever 45, graphite crucible body 46, graphite orifice piece 47, connecting thread 48, orifice 49, stopper rod head 50, thermocouple 51, stopper rod body 52, graphite nut 53, clamper 54, elevating lever 55.
Assembly relation of the present utility model as shown in Figure 1 is by power cabinet 1, stainless steel cavity 2, furnace cover lifting cylinder 3, stainless steel bell 4, observation window 5, chilled(cooling) water return (CWR) 6, control panel 7, locker 8, vacuum meter 9, stopper rod lift cylinder 10, argon flow amount meter 11 compositions such as grade.Stainless steel cavity 2 is fixed on the power cabinet 1, and stainless steel bell 4 is provided with observation window 5 by 3 its liftings of control of furnace cover lifting cylinder in stainless steel bell 4 the place aheads, and the inner logical cooling water 6 of bell makes its heating that can not heat up when melting.Stainless steel cavity 2 is locked by locker 8 with bell 4.Stopper rod lift cylinder 10 is fixed on the power cabinet 1, and the lifting of control stopper rod opens and closes.The founding operation is undertaken by control panel 7, determines the indoor vacuum of founding by vacuum meter 9, the argon shield situation when determining founding by argon flow amount meter 11.Cavity provides the space and the support of founding chamber, and being connected with power supply provides thermal source, is connected with vacuum tube and can vacuumizes indoor, is connected with tunger tube to charge into argon gas.Bell forms with cavity by lift cylinder and locker and cooperates closely, finishes the function that vacuumizes with applying argon gas, during the realization melting to the protection of molten metal.Crucible is responsible for the loading and the fusing of metal charge.The temperature and the casting process of stopper rod control molten metal.
Shown in accompanying drawing 2a, accompanying drawing 2b, cavity is by front panel 12, left wallboard 13, left asbestos wool 14, squab panel 15, argon gas ozzle 16, vacuum nozzle 17, back asbestos wool 18, back asbestos board 19, sealing ring 20, stopper rod 21, right asbestos wool 22, graphite crucible 23, ceramic crucible 24, right wallboard 25, right asbestos wool 26, induction coil 27, end refractory brick 28, preceding asbestos wool 29, end refractory slab 30, base plate 31 compositions such as grade.Front panel 12, left wallboard 13, squab panel 15, right wallboard 25 and base plate 31 are formed the cavity space of founding chamber.Serve as a contrast left asbestos wool 14, back asbestos wool 18, back asbestos board 19, right asbestos wool 22, preceding asbestos wool 29 respectively at the wallboard inwall, end refractory brick 28, end refractory slab 30 carry out heat insulation.Induction coil 27 is connected to the medium frequency induction power supply output, places stainless steel cavity 2 central authorities, and graphite crucible 23 is placed in the ceramic crucible 24, and ceramic crucible 24 is placed on the end refractory brick 28, presses close to induction coil 27, as the outer lining of graphite crucible.The opening and closing that stopper rod 21 is realized the crucible outlet by stopper rod lift cylinder 10.Metal charge adds in the graphite crucible, under the induced-current effect to the metal charge heat fused.Thermocouple places in the stopper rod, and molten metal is carried out thermometric.Molten metal can utilize inductive electromagnetic to stir, and makes composition and temperature reach even.Four side wall centers at stainless steel cavity 2 are installed sealing ring 20, are convenient to form confined space with bell.Vacuum nozzle 17 and argon gas ozzle 16 have been settled at cavity interior angle place; vacuum nozzle 17 can vacuumize inside cavity; argon gas ozzle 16 can make melting under protective atmosphere in the cavity; and the later stage metal bath surface is pressurizeed in cast; both made molten metal flow out crucible smoothly; reduce the cast back and stay the residual metal material and stop up the problem of orifice, can reduce the oxidization burning loss of graphite crucible again in crucible bottom.Cavity is fixed on the power cabinet, and difference filled stone velveteen and asbestos board between induction coil and wallboard inwall are placed refractory slab and refractory brick between induction coil and base plate, reach good effect of heat insulation.Four side wall centers at the stainless steel cavity are installed sealing ring, are convenient to form confined space with bell.Vacuum nozzle and argon gas ozzle have been settled at cavity interior angle place; vacuum nozzle can vacuumize inside cavity; the argon gas ozzle can make melting under protective atmosphere in the cavity; and the later stage metal bath surface is pressurizeed in cast; both made molten metal flow out crucible smoothly; reduce the cast back and stay the residual metal material and stop up the problem of orifice, can reduce the oxidization burning loss of graphite crucible again in crucible bottom.
As shown in accompanying drawing 3a, accompanying drawing 3b, bell is by furnace cover lifting cylinder 3, stainless steel bell 4, asbestos wool 32, refractory brick 33, lift shaft 34, rotating shaft tube 35, cooling water inlet 36, coolant outlet 37, locker fixture 38, hot baffle 39, glass base 40, safety glass 41, glass cover 42, screw 43, hot baffle lever 44 is observed door lever 45 compositions such as grade.Be made into three-dimensional trapezoidal bell 4 with stainless steel, rotating shaft tube 35 is separately fixed on power cabinet 1 and the bell 4, lift shaft 34 is installed on the rotating shaft tube 35, lift shaft 34 connects lift cylinder 3, can realize that by bell cylinder 3 lifting opens and closes, bell is rotated by lift shaft 34 and rotating shaft tube 35.The bell edge is smooth, is convenient to form sealing with the stainless steel cavity.Bell and stainless steel cavity are convenient to vacuumizing and charge into argon gas in the cavity by 38 lockings of locker fixture.The bell front center is offered observation window 5, safety glass 41 is installed on observation window 5, safety glass 41 is installed on the glass seat 40, glass cover 42 is installed on the safety glass 41 observation window 5 next doors and establishes and observe a door lever 45, hot baffle is installed in safety glass 41 lower surface, by 44 its foldings of control of hot baffle lever, be convenient to observe founding chamber situation.Bell inwall lining stone velveteen 35 and refractory brick 36 play heat-blocking action.Cooling water inlet 36 and outlet 37 are offered in the bell bottom, utilize recirculated cooling water to make bell remain on normal temperature.
Shown in accompanying drawing 4a, accompanying drawing 4b, crucible is by ceramic crucible 24, graphite crucible body 46, and graphite orifice piece 47, connecting thread 48, orifice 49 is formed.Graphite crucible 23 is designed to combined type, and graphite crucible body 46, graphite orifice piece 47 link together by screw thread 48.Orifice piece 49 tops and crucible body 46 closely cooperate, and the bottom is made into circle drum platform shape, is convenient to rotate the orifice piece.When obstruction or distortion appear in the orifice of orifice piece, can change the orifice piece easily, guarantee the smooth and easy and granulation effect of casting process, avoid crucible is scrapped.The design of crucible orifice 49 is very big to metal liquid stream influence, is to improve granulation speed, adopts the multithread outlet design in 5～7 holes, and the hole is made up-small and down-big open, and molten metal can be flowed out smoothly.
Shown in accompanying drawing 5a, accompanying drawing 5b, stopper rod is by stopper rod head 50, thermocouple 51, and stopper rod body 52, graphite nut 53, clamper 54, elevating lever 55, stopper rod lift cylinder 10 is formed.Crucible stopper rod head 50 is done coning, and the circular cone side tightly cooperates with orifice piece 49 end faces, has made it excellent sealing performance.Graphite stopper rod body 52 is combined into the crucible stopper rod with stopper rod head 50 by being threaded, the crucible stopper rod is fixing by graphite nut 53 and clamper 54, and clamper is connected on the elevating lever 55, can make lifting action by stopper rod lift cylinder 10, controls its unlatching.Adopted the built-in type thermocouple, thermocouple 51 is packed in the crucible stopper rod, the idol head is positioned at the end of crucible stopper rod, and accurate temperature control is realized near the crucible exit in the end of crucible stopper rod.When the deformation effect sealing effectiveness appears in the stopper rod head, can change the stopper rod head easily.
Claims (5)
1. jewellery alloy granulation founding chamber; comprise by power cabinet; the stainless steel cavity; the furnace cover lifting cylinder; the stainless steel bell; observation window; the chilled(cooling) water return (CWR); control panel; locker; vacuum meter, the stopper rod lift cylinder, the argon flow amount meter is formed; the stainless steel cavity is fixed on the power cabinet; the furnace cover lifting cylinder is installed on the power cabinet, and the stainless steel bell is installed on the lift shaft of furnace cover lifting cylinder, in stainless steel bell the place ahead observation window is set; in the stainless steel bell, be provided with cooling-water duct; stainless steel cavity and bell are locked by locker, and control panel is installed on power cabinet, and vacuum meter is installed on power cabinet; the stopper rod lift cylinder is fixed on the power cabinet; induction coil is enclosed within on the crucible, and the stopper rod lift cylinder connects elevating lever, and stopper rod is installed in the crucible; it is characterized in that crucible is by ceramic crucible; graphite crucible constitutes, and graphite crucible is placed in the ceramic crucible, and ceramic crucible is placed on the end refractory brick; induction coil is enclosed within on the crucible; graphite crucible is made of graphite crucible body and graphite orifice piece, and graphite orifice piece has a plurality of tap holes by being threaded on one's body the graphite crucible on the graphite orifice piece.
2. jewellery alloy granulation founding according to claim 1 chamber, the bottom that it is characterized in that graphite orifice piece are circle drum platform shapes, the up-small and down-big shape of tap hole.
3. jewellery alloy granulation founding according to claim 1 chamber is characterized in that stopper rod by the graphite stopper rod, the stopper rod head; the graphite nut, clamper, elevating lever; thermocouple constitutes; the stopper rod head is done coning, and the circular cone side tightly cooperates with orifice piece end face, and graphite stopper rod and stopper rod head are by being threaded; the graphite nut is connected on the graphite stopper rod; graphite nut and clamper are fixed, and clamper is connected on the elevating lever, and thermocouple is packed in the graphite stopper rod.
4. jewellery alloy granulation founding according to claim 1 chamber; it is characterized in that the stainless steel cavity is by the stainless steel cavity wall; asbestos wool, asbestos board, refractory slab; refractory brick; induction coil, vacuum nozzle, argon gas ozzle and sealing ring constitute; the stainless steel cavity wall is by front panel; squab panel, left wallboard, right wallboard and base plate are formed; induction coil places stainless steel cavity central authorities; filled stone velveteen and asbestos board between induction coil and stainless steel cavity wall are placed refractory slab and refractory brick between induction coil and base plate, the end face of stainless steel cavity wall is provided with groove; sealing ring is installed in groove, vacuum nozzle and argon gas ozzle are installed in the stainless steel cavity.
5. jewellery alloy granulation founding according to claim 1 chamber; it is characterized in that the stainless steel bell by bell, lift cylinder, lift shaft; the rotating shaft tube; locker, observation window, asbestos wool; refractory brick; cooling water pipe constitutes, and it is three-dimensional trapezoidal that bell becomes, bell inwall lining stone velveteen and refractory brick; the embedded chilled(cooling) water return (CWR) of bell; link to each other with outlet with the cooling water inlet, the rotating shaft tube is fixed on the power cabinet, and bell is installed on the rotating shaft tube; lift shaft is installed on the rotating shaft tube; lift shaft connects lift cylinder, and the bell front center is offered observation window, and safety glass is installed on observation window; safety glass is installed on the glass seat; glass cover is installed on the safety glass, and the observation window next door is established and observed the door lever, and hot baffle is installed in the safety glass lower surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202118397U CN201744661U (en) | 2010-05-26 | 2010-05-26 | Granulating and casting room for jewelry alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202118397U CN201744661U (en) | 2010-05-26 | 2010-05-26 | Granulating and casting room for jewelry alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201744661U true CN201744661U (en) | 2011-02-16 |
Family
ID=43579331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202118397U Expired - Fee Related CN201744661U (en) | 2010-05-26 | 2010-05-26 | Granulating and casting room for jewelry alloy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201744661U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636280A (en) * | 2012-04-06 | 2012-08-15 | 清华大学 | Temperature measuring equipment used for measuring temperature in airtight casting container |
| CN107671302A (en) * | 2017-10-31 | 2018-02-09 | 广州番禺职业技术学院 | A kind of shotting shunting collector and method |
| CN111482615A (en) * | 2020-05-19 | 2020-08-04 | 郑州机械研究所有限公司 | Bottom leakage casting ultrasonic auxiliary system and bottom leakage casting system |
-
2010
- 2010-05-26 CN CN2010202118397U patent/CN201744661U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636280A (en) * | 2012-04-06 | 2012-08-15 | 清华大学 | Temperature measuring equipment used for measuring temperature in airtight casting container |
| CN107671302A (en) * | 2017-10-31 | 2018-02-09 | 广州番禺职业技术学院 | A kind of shotting shunting collector and method |
| CN111482615A (en) * | 2020-05-19 | 2020-08-04 | 郑州机械研究所有限公司 | Bottom leakage casting ultrasonic auxiliary system and bottom leakage casting system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106180659B (en) | A kind of strand directional solidification and the Combined water chill mould of regional choice cooling | |
| CN101543885B (en) | Device and method for continuous block metal glass shaping | |
| CN103170596B (en) | Multipurpose vacuum casting device | |
| US3998264A (en) | Apparatus for producing metallic castings by progressively melting a solid charge | |
| CN104889401A (en) | Method for preparing CuCr25 electrical contact | |
| CN102179493A (en) | Vacuum continuous casting apparatus for high-temperature alloy | |
| CN111690832B (en) | Cold crucible induction melting-die casting device and method for preparing block amorphous material | |
| CN113385681A (en) | CoCrNi intermediate entropy alloy and atomization powder preparation method manufacturing process thereof | |
| CN103882185A (en) | High-pressure bottom-blowing refining casting device and method for smelting high-nitrogen steel by using same | |
| CN201744661U (en) | Granulating and casting room for jewelry alloy | |
| CN110814305A (en) | Cu-Fe composite material double-melt mixed casting equipment and process | |
| CN104388714A (en) | Smelting preparation method of large-sized titanium-aluminum intermetallic ingot | |
| CN107457408A (en) | The sensing atomization of continous way cold crucible prepares titanium valve equipment | |
| CN104227005A (en) | Integrated type equipment for preparing metal powder through smelting, current-limiting pouring and atomizing | |
| CN208178424U (en) | The induction atomization of continous way cold crucible prepares titanium valve equipment | |
| CN212682432U (en) | Water atomization alloy powder tundish | |
| CN104416162B (en) | A kind of alloy rapid solidification equipment and autocontrol method thereof | |
| CN106334800B (en) | The sensing atomization of cold crucible bottom filling prepares titanium valve equipment | |
| CN106929699B (en) | A kind of large volume high-alloying aluminium alloy melt treatment device and method | |
| CN117245064A (en) | Process and equipment for controlling crystallization structure of integral casting roller | |
| CN107083501B (en) | A kind of iron nickel-molybdenum alloy raw powder's production technology | |
| CN104624995B (en) | The device of liquid level fluctuation of crystallizer is suppressed under a kind of high pulling rate | |
| CN106834762B (en) | A kind of vacuum melting device of intermetallic Ni-Al compound | |
| CN206316379U (en) | The sensing atomization of cold crucible bottom filling prepares titanium valve equipment | |
| CN102784916B (en) | Negative pressure injection molding process for preparation of high-alloying material with tight coupling nozzle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110216 Termination date: 20120526 |