CN204242934U - Switch tank body and use arc control device, the high voltage switching device of this switch tank body - Google Patents
Switch tank body and use arc control device, the high voltage switching device of this switch tank body Download PDFInfo
- Publication number
- CN204242934U CN204242934U CN201420642818.9U CN201420642818U CN204242934U CN 204242934 U CN204242934 U CN 204242934U CN 201420642818 U CN201420642818 U CN 201420642818U CN 204242934 U CN204242934 U CN 204242934U
- Authority
- CN
- China
- Prior art keywords
- tank body
- solid insulation
- insulation cover
- internal face
- face
- 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
Landscapes
- Circuit Breakers (AREA)
Abstract
The utility model discloses a kind of switch tank body and use arc control device, the high voltage switching device of this switch tank body.The insulating coating of spray coating on the internal face of arc control device breaker in middle tank body, be in solid insulation cover to make connecing electric main body, and solid insulation cover is by between the internal face of give vent to anger position and switch tank body being located at blowout side, and the internal face of solid insulation cover is for stopping the baffling-face that the insulating gas that blowout side spray goes out makes the insulating gas baffling of ejection commutate.In use, the insulating gas that the spout of driven power connection end ejects is to after the high-voltage arc arc extinguishing in fracture, go out from the blowout side spray connect electric main body, now not only flow velocity and temperature are still higher for insulating gas, and some metallic dusts and ionization analyte will be mingled with, now the mist of high temperature and high speed will collide on the baffling-face of fixed solid insulating case, thus avoids the mist gone out from blowout side spray to the impact erosion of the internal face of switch tank body.
Description
Technical field
The utility model relates to a kind of switch tank body and uses arc control device, the high voltage switching device of this switch tank body.
Background technology
At present, in switchgear, customary insulation mode is divided into gas-insulated and fixed insulation, gas isolated mode is filled with sulfur hexafluoride gas, nitrogen etc. in arc control device, the mode of solid insulation is in arc control device, arrange polytetrafluoroethylene, electroporcelain material, glass fabric, resin material etc., and in the insulation against ground of metal enclosed switchgear, generally adopt gas isolated mode, its advantage is that the form of gas is not fixed, especially adopt the switchgear of air blowing arc extinguishing, gas-insulated plays the effect of arc extinguishing especially.But no matter gas-insulated adopts sulfur hexafluoride gas or nitrogen, its dielectric strength is all lower than the fixed insulation material in fixed insulation, and the variable effect of temperature, pressure, element ablation in the switch tank body that the insulation property of insulating gas can be subject to metal enclosed switchgear, cause metal enclosed switchgear under equal electric pressure, adopt gas isolated switch tank body larger than adopting the switch tank body external diameter of open type switchgear.
When metal enclosed switchgear carries out cut-offfing action, insulating gas is spurted to quiet power connection end from the dynamic power connection end of arc control device, the electric arc that insulating gas will be blown out between static arc contact and moving arcing contact, and the cooling duct flowed through in fixed contact pedestal---air side of the open type on fixed contact pedestal periphery or flow through the surface of the static arc contact---air side of the open type on static arc contact periphery, the internal face injecting directly on switch tank body carries out baffling.But because of dynamic, between static connection end, high-temperature electric arc can heat insulating gas, make the pressure increase of insulating gas, insulating capacity declines, and the dynamic power connection end of arc control device utilizes mechanical system manufacture pressure differential or utilize arc control device pressure itself difference to carry out arc extinguishing, the quiet power connection end simultaneously high-temperature insulation gas being blowed to arc control device cools, so in the gas-cooled process of high-temperature insulation, the element of the quiet power connection end of gas meeting ablation arc control device, to produce a certain amount of metallic dust and ionization analyte in the gas channel of quiet power connection end, the insulating gas of this part dust Sum decomposition thing and not thoroughly cooling will directly be jetted on the internal face of switch tank body from the air side on quiet power connection end, the dust Sum decomposition thing be mixed in insulating gas can burn and corrode the tank skin of switch tank body, so that the internal face of switch tank body is uneven, heavy then arc control device will be caused to puncture over the ground or discharge, so Cubicle Gas-Insulated Switchgear needs to reduce insulating gas temperature by extending the quiet end gas channel of arc control device usually.
But gas channel to be extended in limited space, deflection plate can only be increased in cooling duct in the quiet power connection end of arc control device, the effect of deflection plate is also limited, when the switch tank body internal diameter of Cubicle Gas-Insulated Switchgear narrows down to a certain degree, insulation against ground will become very responsive, as long as there is the reduction of some insulation property, will cause discharging over the ground or puncturing, now have no baffle plate will affect not quite the insulation property of whole arc control device.
And along with the progress of society, the continuous increase of the density of population, the requirement of modern society to the utilance in space also improves thereupon, so that the demand that market reduces the overall dimension of metal enclosed switchgear is more and more higher, as in electrical network requirement of invitation for bid, the width of 252kV three-phase phase-splitting metal enclosed switchgear is down to 1500mm from initial 2300mm, it is such as the circuit breaker of dielectric with sulfur hexafluoride gas, if the diameter itself of arc control device does not reduce, the switch tank diameter of metal enclosed switchgear has dropped to a limit, if reduce switch tank diameter further, only have and increase insulating gas pressure in switch tank body, but this method not only wastes gas, but also have impact to the safety of metal enclosed switchgear, improve design pressure after all, not only material cost will be increased, but also need more high-grade authentication of professional qualification.
Utility model content
The purpose of this utility model is to provide a kind of switch tank body avoiding internal face to be impacted the high-voltage switch gear arc control device of burning by the insulating gas of high temperature, additionally provides a kind ofly use the arc control device of this switch tank body and use the high voltage switching device of these arc control device simultaneously.
In order to realize above object, the technical scheme of the utility model breaker in middle tank body is as follows:
Switch tank body, comprise the tank body body connecing the pipe box shape of electric main body be relatively assembled for holding dynamic and static power connection end, on the internal face of tank body body, spray coating has insulating coating, be equipped with for every being located at the solid insulation cover between outer peripheral face and the internal face of tank body body connecing electric main body in insulating coating, the internal face of solid insulation cover is prevent the insulating gas that and the baffling-face of baffling commutation for intercepting from the blowout side spray connecing electric main body, and the outside wall surface of solid insulation cover is the fitting surface coordinated with insulating coating.
The thermal endurance class of the inwall of solid insulation cover is not less than C level.
The class of insulation that solid insulation overlaps is higher than the class of insulation of insulating coating.
The internal face of tank body body is convexly equipped with the limited step of block at solid insulation cover two ends.
The jacket wall of solid insulation cover offers the seam extended vertically, the ring end face at the two ends of the through solid insulation cover of seam.
The technical scheme of arc control device of the present utility model is as follows:
Arc control device, comprise switch tank body, the tank body body of switch tank body is pipe box shape, be provided with in tank body body by moving, what quiet power connection end was assembled relatively connects electric main body, the periphery connecing electric main body is provided with and blows to the open type of the internal face of tank body body or the blowout side of open type for the insulating gas after arc extinguishing, on the internal face of tank body body, spray coating has the insulating coating being centered around and connecing electric main body periphery, be equipped with every being located at the solid insulation cover between outer peripheral face and the internal face of tank body body connecing electric main body in insulating coating, the internal face of solid insulation cover is prevent the insulating gas that and the baffling-face of baffling commutation for intercepting from blowout side spray, the outside wall surface of solid insulation cover is the fitting surface coordinated with the internal face of tank body body.
The class of insulation that solid insulation overlaps is higher than the class of insulation of insulating coating.
The two ends of solid insulation cover and/or insulating coating are stretched out from the two ends connecing electric main body.
The internal face of tank body body is convexly equipped with the limited step of block at solid insulation cover two ends.
The technical scheme of high voltage switching device of the present utility model is as follows:
High voltage switching device, comprise the operating mechanism of arc control device and upper driving connection thereof, arc control device comprise switch tank body, the tank body body of switch tank body is pipe box shape, be provided with in tank body body by moving, what quiet power connection end was assembled relatively connects electric main body, the periphery connecing electric main body is provided with and blows to the open type of the internal face of tank body body or the blowout side of open type for the insulating gas after arc extinguishing, on the internal face of tank body body, spray coating has the insulating coating being centered around and connecing electric main body periphery, be equipped with every being located at the solid insulation cover between outer peripheral face and the internal face of tank body body connecing electric main body in insulating coating, the internal face of solid insulation cover is prevent the insulating gas that and the baffling-face of baffling commutation for intercepting from blowout side spray, the outside wall surface of solid insulation cover is the fitting surface coordinated with the internal face of tank body body.
In the utility model, the outside wall surface of solid insulation cover coordinates with the insulating coating of spray coating on the internal face of switch tank body and realizes locating, be in solid insulation cover to make connecing electric main body, and solid insulation cover is by between the internal face of give vent to anger position and switch tank body being located at blowout side, and the internal face of solid insulation cover is for stopping the baffling-face that the insulating gas that blowout side spray goes out makes the insulating gas baffling of ejection commutate.In use, the insulating gas that the spout of driven power connection end ejects is to after the high-voltage arc arc extinguishing in fracture, go out from the blowout side spray connect electric main body, now not only flow velocity and temperature are still higher for insulating gas, and some metallic dusts and ionization analyte will be mingled with, now the mist of high temperature and high speed will collide on the baffling-face of fixed solid insulating case, this baffling-face will play the effect of containment by the mist powerful to wind-force, to make the energy of mist be released by collision effect, thus avoid the mist gone out from blowout side spray to the impact erosion of the internal face of switch tank body.Simultaneously, solid insulation overlaps the dielectric strength not only can strengthened in arc control device, and when the baffling-face of the continuous colliding solid insulating case of mist, even if baffling-face becomes uneven, also the electric field at residing position can be made to keep stable because the internal face of switch tank body keeps complete, thus avoid and connect electric main body and occur in blowout side the problem that the tank skin of the switch tank body caused by electric field change is breakdown.In addition, insulating coating plays double protective effect in the periphery that solid insulation overlaps, and when avoiding solid insulation to be enclosed within appearance breakage, avoids the tank skin of switch tank body directly by arc through, thus further enhances the insulation property of arc control device.
Further, the class of insulation of solid insulation cover, higher than the class of insulation of insulating coating, improves to utilize dielectric difference of unlike material the electric field connecing electric main body periphery to manufacture electric capacity.
Accompanying drawing explanation
Fig. 1 is the structural representation of arc control device in the embodiment of high voltage switching device of the present utility model.
Embodiment
The embodiment of the utility model high-voltage switch device: as shown in Figure 1, this high voltage switching device is a kind of primary cut-out, comprise the operating mechanism of arc control device and upper driving connection thereof, the structure of operating mechanism belongs to prior art, and arc control device are formed primarily of switch tank body, dynamic power connection end 2 and quiet power connection end 4.Switch tank body is again overlap 5 by tank body body 3 and solid insulation to form, tank body body 3 is the pipe box body extended in left-right direction, the coaxial setting that dynamic power connection end 2 is relative with quiet power connection end 4 left and right in tank body body 3 and form that left and right extends connect electric main body, and offer the blowout side 6 of downward opening outlet type in the position, bottom side of the outside wall surface of quiet power connection end 4.Solid insulation cover 5 be sleeved on connect electric main body periphery on, the two ends of solid insulation cover 5 are stretched out from the two ends connecing electricity, the internal face of solid insulation cover 5 is baffling-face, the solid insulation cover outside wall surface of 5 and the internal face matched in clearance of tank body body 3, and insulating coating 7 is provided with between the outside wall surface and the internal face of tank body body 3 of solid insulation cover 5, this insulating coating 7 spray coating, on the internal face of tank body body 3, is overlapped 5 to make solid insulation and is realized being connected with the location of the tank skin of tank body body 3 by the mode of swelling on insulating coating 7.
The two ends, left and right of solid insulation cover 5 are stretched out from the left and right sides of quiet power connection end 4, the jacket wall of solid insulation cover 5 offers the seam 10 extended vertically, this seam 10 runs through the ring end face at the two ends of solid insulation cover 5 and makes solid insulation overlap for C shape body, with when solid insulation cover 5 is loaded tank body body 3, first the docking wall of seam 10 both sides can be staggered, after between two flange-interfaces that solid insulation cover 5 enters tank body body 3 completely, again the docking wall of seam 10 both sides of solid insulation cover 5 is docking together, make solid insulation overlap 5 swellings to be assemblied on insulating coating 7.
The two-port of tank body body 3 is respectively arranged with inner flange 8, inner flange 8 forms protruding spacing ring on the internal face of tank body body, this spacing ring block is at the endface position place, two ends of solid insulation cover 5, overlap 5 to stop solid insulation to deviate from from the two ends of tank body body 3, and inner flange makes the port of tank body body 3 be spacing reducing.Tank body body 3 is metal switch tank body 3, the top of tank body body 3 is provided with the moved end wire hole that connects dynamic power connection end 2 respectively and is connected quiet the quiet of power connection end 4 and brings out string holes, moved end wire hole and the quiet Flange joint respectively that to bring out in string holes have insulating basin 1, and the perforation that the wiring construction for quiet terminals 4 passes is offered at the top of solid insulation cover 5, the aperture of this perforation is consistent with the quiet aperture bringing out string holes.
Solid insulation cover 5 is except employing polytetrafluoroethylene material, also the high temperature insulating materials such as ceramic material can be adopted, this type of material is after running into high-temperature hot air-flow, insulation property can not be reduced because of the change of temperature, and solid insulation cover 5 also can be that multi-layer material is composited, its objective is the electric field utilizing dielectric difference of unlike material to improve quiet power connection end 4 periphery to manufacture electric capacity, but the baffling-face of solid insulation cover 5 must be high-temperature insulation material, and namely residing for baffling-face, the thermal endurance class of layer is not less than C level.The situation that insulation property reduce can be there is in the insulating gas of quiet power connection end 4 periphery in high-temperature electric arc heating, and the baffling-face of solid insulation cover 5 covers the side-lower of giving vent to anger of quiet power connection end 4, to make the thermal current of discharging from quiet power connection end 4 stop by the baffling-face of solid insulation cover 5, the high-temperature insulation gas being mingled with metallic dust and ionization analyte is avoided to inject directly on the internal face of tank body body 3.Set solid insulation cover 5 thickness time, due to solid insulation cover 5 dielectric strength depend on its material and thickness, for this reason ad hoc determine following steps to calculate solid insulation overlap 5 thickness:
Account form one: 1, according to insulating gas under the impact of thermal current, losing insulating capacity is completely basis;
2, by calculating or test method, know that arc control device are not before installing solid insulation cover 5 additional, arc control device are by the minimum insulation distance of thunder and lightning and power frequency insulating test over the ground;
3, according to the minimum insulation distance in step 2, calculate the thickness of the solid insulation cover 5 needed in tank body body 3, but because the dielectric strength of solid insulation material is different, so in foundation step 2, the thickness of the solid insulation cover 5 that insulation distance calculates can change along with the difference of material.
Account form two: 1, by calculate or test method, know arc control device do not install additional insulation resistance to ablation layer before, arc control device are by the insulation distance of type approval test;
2, according to minimum insulation distance in step 1, the minimum insulation distance with not installing the resistance to ablation layer that insulate in mode one additional, compares, and calculates the thickness of the solid insulation cover 5 needed in circuit breaker.
Therefore pass-through mode two can reduce the diameter of tank body body 3 to greatest extent.
Because all solids insulating material is different according to production technology, also great changes have taken place for self dielectric strength, so the present embodiment only specifies the referential data of some conventional solid insulating material, suppose, the dielectric strength of sulphur hexafluoride is 1, according to calculation and test, the dielectric strength of epoxy resin is 4-6, the dielectric strength of sulphurated siliastic is 3-4, and the dielectric strength of polytetrafluoro is 2-3, and the dielectric strength of porcelain insulating material is 5-7.
When assembling these arc control device, can under solid insulation overlaps 5 curling states, from the two-port of tank body body 3, any one loads, and launch again after solid insulation cover 5 loads, solid insulation is made to overlap 5 swellings on insulating coating 7, after solid insulation cover 5 assembles, more dynamic power connection end 2 and quiet power connection end 4 are assemblied in tank body body 3, and realize the encapsulation of arc control device by end cap 9 and insulating basin 1.
In the above-described embodiments, the swelling of solid insulation cover is assemblied on insulating coating, and in other are implemented, solid insulation cover also can be bonded on insulating coating by tack coat.
In the above-described embodiments, the blowout side on quiet power connection end is the aperture being in its position, bottom side, and in other are implemented, this blowout side also can be the opening etc. of the notch form that the periphery open spaces of fixed contact or quiet power connection end are offered.
In the above-described embodiments, at tank body body two ends by inner flange block solid insulation cover, in other embodiments, the limited step of spacing ring type that this inner flange is formed on the internal face of tank body body also can be replaced by the limited step of the form such as projection shape, semi-circular of projection on the internal face of tank body body.In addition, limited step also can be removed, and realizes location to be coordinated by the side face of solid insulation cover and tank body body.
The embodiment of arc control device in the utility model: in the present embodiment, the structure of arc control device is identical with the structure of arc control device in above-mentioned enforcement, therefore repeats no more.
The embodiment of the utility model breaker in middle tank body: the structure of the present embodiment breaker in middle tank body is identical with the structure of above-described embodiment breaker in middle tank body, therefore repeats no more.
Claims (10)
1. switch tank body, comprise the tank body body connecing the pipe box shape of electric main body be relatively assembled for holding dynamic and static power connection end, it is characterized in that, on the internal face of tank body body, spray coating has insulating coating, be equipped with for every being located at the solid insulation cover between outer peripheral face and the internal face of tank body body connecing electric main body in insulating coating, the internal face of solid insulation cover is prevent the insulating gas that and the baffling-face of baffling commutation for intercepting from the blowout side spray connecing electric main body, and the outside wall surface of solid insulation cover is the fitting surface coordinated with insulating coating.
2. switch tank body according to claim 1, is characterized in that, the thermal endurance class of the inwall of solid insulation cover is not less than C level.
3. switch tank body according to claim 1 and 2, is characterized in that, the class of insulation that solid insulation overlaps is higher than the class of insulation of insulating coating.
4. switch tank body according to claim 1 and 2, is characterized in that, the internal face of tank body body is convexly equipped with the limited step of block at solid insulation cover two ends.
5. switch tank body according to claim 4, is characterized in that, the jacket wall of solid insulation cover offers the seam extended vertically, the ring end face at the two ends of the through solid insulation cover of seam.
6. arc control device, comprise switch tank body, the tank body body of switch tank body is pipe box shape, be provided with in tank body body by moving, what quiet power connection end was assembled relatively connects electric main body, the periphery connecing electric main body is provided with and blows to the open type of the internal face of tank body body or the blowout side of open type for the insulating gas after arc extinguishing, it is characterized in that, on the internal face of tank body body, spray coating has the insulating coating being centered around and connecing electric main body periphery, be equipped with every being located at the solid insulation cover between outer peripheral face and the internal face of tank body body connecing electric main body in insulating coating, the internal face of solid insulation cover is prevent the insulating gas that and the baffling-face of baffling commutation for intercepting from blowout side spray, the outside wall surface of solid insulation cover is the fitting surface coordinated with the internal face of tank body body.
7. arc control device according to claim 6, is characterized in that, the class of insulation that solid insulation overlaps is higher than the class of insulation of insulating coating.
8. arc control device according to claim 6, is characterized in that, the two ends of solid insulation cover and/or insulating coating are stretched out from the two ends connecing electric main body.
9. the arc control device according to claim 6 or 7 or 8, is characterized in that, the internal face of tank body body are convexly equipped with the limited step of block at solid insulation cover two ends.
10. high voltage switching device, comprise the operating mechanism of arc control device and upper driving connection thereof, arc control device comprise switch tank body, the tank body body of switch tank body is pipe box shape, be provided with in tank body body by moving, what quiet power connection end was assembled relatively connects electric main body, the periphery connecing electric main body is provided with and blows to the open type of the internal face of tank body body or the blowout side of open type for the insulating gas after arc extinguishing, it is characterized in that, on the internal face of tank body body, spray coating has the insulating coating being centered around and connecing electric main body periphery, be equipped with every being located at the solid insulation cover between outer peripheral face and the internal face of tank body body connecing electric main body in insulating coating, the internal face of solid insulation cover is prevent the insulating gas that and the baffling-face of baffling commutation for intercepting from blowout side spray, the outside wall surface of solid insulation cover is the fitting surface coordinated with the internal face of tank body body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420642818.9U CN204242934U (en) | 2014-10-31 | 2014-10-31 | Switch tank body and use arc control device, the high voltage switching device of this switch tank body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420642818.9U CN204242934U (en) | 2014-10-31 | 2014-10-31 | Switch tank body and use arc control device, the high voltage switching device of this switch tank body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204242934U true CN204242934U (en) | 2015-04-01 |
Family
ID=52772394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420642818.9U Expired - Fee Related CN204242934U (en) | 2014-10-31 | 2014-10-31 | Switch tank body and use arc control device, the high voltage switching device of this switch tank body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204242934U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104362034A (en) * | 2014-10-31 | 2015-02-18 | 平高集团有限公司 | Switch tank and arc extinguish chamber and high-voltage switch gear using switch tank |
-
2014
- 2014-10-31 CN CN201420642818.9U patent/CN204242934U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104362034A (en) * | 2014-10-31 | 2015-02-18 | 平高集团有限公司 | Switch tank and arc extinguish chamber and high-voltage switch gear using switch tank |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204885938U (en) | Looped netowrk cabinet with dehumidification function | |
| JP4218216B2 (en) | Gas circuit breaker | |
| CN103828008A (en) | Arrangement comprising a circuit breaker interrupter unit | |
| CN204242934U (en) | Switch tank body and use arc control device, the high voltage switching device of this switch tank body | |
| CN204102794U (en) | Shielding cylinder is provided with the pole of full skirt | |
| CN204242925U (en) | Switching device and arc control device, tank body | |
| CN204243600U (en) | Closed type switch and arc control device, tank body | |
| CN204243598U (en) | Tank body and use arc control device, the closed type switch of this tank body | |
| CN102881508A (en) | Solid insulating pole | |
| CN202816779U (en) | Solid insulated pole | |
| CN204242936U (en) | A kind of switching device tank body and use arc control device, the high voltage switching device of this tank body | |
| CN204242933U (en) | High voltage switching device and arc control device, tank body | |
| CN104362536B (en) | Closed switching device, and arc extinguish chamber and tank of closed switching device | |
| CN104362032A (en) | Switching device and arc extinction chamber and tank thereof | |
| CN105321750B (en) | The arc quenching system of control and protective switch | |
| CN103730289A (en) | Sulfur hexafluoride gas arc extinguishing switching device | |
| CN104362036B (en) | Switching device tank body and arc-chutes, the high-tension switch gear using the tank body | |
| CN204242924U (en) | A kind of tank body and use arc control device, the high voltage switching device of this tank body | |
| CN104362034A (en) | Switch tank and arc extinguish chamber and high-voltage switch gear using switch tank | |
| CN104362535A (en) | Tank, arc extinguish chamber using tank, and sealed switch device | |
| CN100397737C (en) | Gas insulation switch device | |
| CN104362031A (en) | Tank and arc extinguish chamber and high-voltage switch gear using tank | |
| CN106328435A (en) | Arc-extinguishing chamber, arc-extinguishing chamber tank and high-voltage switching equipment applying this arc-extinguishing chamber | |
| CN205140813U (en) | Control and protection switch's arc extinguishing system | |
| CN104362035A (en) | High-voltage switch device and arc extinguish chamber and tank of high-voltage switch device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150401 Termination date: 20211031 |