CN204420293U - Guide's sealing configuration of electromagnetic relief valve - Google Patents
Guide's sealing configuration of electromagnetic relief valve Download PDFInfo
- Publication number
- CN204420293U CN204420293U CN201420777521.3U CN201420777521U CN204420293U CN 204420293 U CN204420293 U CN 204420293U CN 201420777521 U CN201420777521 U CN 201420777521U CN 204420293 U CN204420293 U CN 204420293U
- Authority
- CN
- China
- Prior art keywords
- valve
- guide
- seat
- sealing
- electromagnetic relief
- 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
- Lift Valve (AREA)
Abstract
The utility model discloses a kind of guide's sealing configuration of electromagnetic relief valve, described electromagnetic relief valve comprises major-minor valve integrated type and the split type electromagnetic relief valve of major-minor valve.Main technical schemes is: arrange the guide's valve seat be connected and sealed with valve gap in the downside of valve gap, guide's valve seat is provided with the sealing surface of seat matched with valve stem seal face, valve stem seal face is sphere, sealing surface of seat is the conical surface, coincide both during closedown with tangent state; Stem lower portion is provided with on stem guiding face, guide's valve seat and is correspondingly provided with valve seat guide surface for carrying out guide-localization to valve rod lower end.Sealing surface weld deposit high hardness cobalt base alloy, valve stem seal face dorsal part are provided with thermal compensation groove, guide's sealing configuration bottom is provided with side through flow hole simultaneously and lower through flow hole.Its beneficial effect is: the operational safety that can improve guide's sealing configuration, and sealing surface can reach state of better coincideing, sealability is better, is more conducive to speed of response when ensureing valve opening.
Description
Technical field
The utility model relates to a kind of valve mechanism, is specifically related to the partial structurtes of the electromagnetic relief valve product that a kind of power station main steam system uses.
Background technique
Electromagnetic relief valve be used for open fast when the main steam pressure of fired power generating unit exceedes setting value, discharged steam, to reduce the time of movement of main steam safety valve as far as possible, maintain the performance of main steam safety valve and extend use technology cycle of safety valve, making the safety assurance ability that unit keeps enough.The electromagnetic relief valve that current thermal power plant main steam system uses mainly contains two types from product structure, one class be with the product of the enterprises such as U.S. De Laisai-Kang Suo Reed (Dresser-Consolidated) and Crosby (Crosby) be the main valve clack of representative upward, the split type structure of top steam discharge, major-minor valve, the another kind of main valve clack that be product that is wild with Japanese ridge and East Asia two company is representative is down, left and right bilateral is vented, the all-in-one-piece structure of major-minor valve.Electromagnetic relief valve is important mating valve and the critical valves of fired power generating unit.
Guide's sealing configuration of existing electromagnetic relief valve product as shown in Figure 1, valve rod and guide's flap are split structure, valve rod drives guide's flap to rise together with snap ring, guide's flap and even valve seat generally adopt overall brill based hard alloy material, sealing surface is the pattern of the conical surface to the conical surface, and the top in valve seat bottom toward the pilot sleeve of downward-extension offers through flow hole for discharged steam.
The existing electromagnetic relief valve product problem that in use ubiquity sealing is not good, the sealing of especially auxiliary valve, often product is in use for some time or after steam discharge several times, namely auxiliary valve seal starts to occur leaking; After leaking appears in auxiliary valve, the back pressure of main valve clack can be caused to decline, from and impact can be brought to the sealing of main valve.Auxiliary valve sealing surface leaks, and causes sealing surface to be out of shape except this factor except having because condensation water mitigation, and the impact that the structural design defect of existing product produces also is an important reason.
The defect of existing product in guide's design of Sealing Structure mainly comprises: 1, switching motion can be completed instantaneously owing to adopting solenoid actuated, thus for various drive unit, from the drive unit performing the speed of response solenoid actuated of switching motion and be best suited for as safety relief class valve, but the shortcoming of solenoid actuated is that the rated attraction force of electromagnet is less, add existing electromagnetic relief valve product substantially all to have employed the less lever construction of the magnification factor of power this and unaccommodated drive mechanism to transmit the driving force of electromagnet, thus the valve rod obtainable thrust of institute and pulling force is made to be restricted, by the impact of this factor, the diameter of the auxiliary valve sealing surface (guide's sealing surface) of existing product all designs less.Because auxiliary valve sealing surface mainly relies on top power on the medium after closedown to ensure sealing, the less medium active force that it obtains of sealing surface diameter is also less, and sealability is also poorer; In addition also there is guide's sealing place of product to adopt the structure (seal f ace width b=1mm) of plane sealing, also make the sealability of sealing surface be subject to certain restrictions; 2, existing product is due to the size less (diameter as stem lower portion axle journal place is only less than 7mm) of valve rod flap and snap ring, thus valve rod and guide's flap adopt split and carry out the mode of assembling with assembly structure, its reliability can be poor, adding guide's flap is whole hard alloy material, fragility is very large, when bearing back the moment impact of seat easily there is the problems such as fracture in linkage structure place, causes valve cisco unity malfunction; 3, pilot valve flap seal face position adopts the monolithic construction without thermal compensation ability.Valve is when using state, the outside (downside) of guide's valve clack sealing surface is in valve cavity, contacts with high-temperature steam, the main steam temperature of Large Copacity fired power generating unit generally reaches 540 ~ 610 DEG C, thus the outside of guide's valve clack sealing surface can reach very high temperature, and the upside of guide's flap is upwards exhaust passage, communicate with air, therefore, when pilot valve flap seal face position does not adopt compensation design, the larger temperature difference can be formed in the inner and outer in pilot valve flap seal face, thus sealing surface place can be caused to produce uneven thermal deformation and affect sealing; In addition, when sealing surface somewhere occur leak time, the medium leaked out because of volume sharply swelling heat absorption the temperature near sealing face leakage point can be made to decline, unbalanced temperature variation can cause again sealing surface produce inhomogeneous deformation thus aggravation leakage; 4, owing to ensureing structural strength, the area of the through flow hole that valve seat pilot sleeve top is offered is less than normal, can affect the velocity of discharge of steam to a certain extent.
Summary of the invention
In order to overcome the above-mentioned deficiency existing for existing structure and technology, the utility model proposes that a kind of sealing surface can reach state of better coincideing, sealability is better, operational safety is higher, be more conducive to guide's sealing configuration of the power station main steam system electromagnetic relief valve of speed of response when ensureing valve opening.
To achieve these goals, the utility model is by the following technical solutions:
Guide's sealing configuration of electromagnetic relief valve, described electromagnetic relief valve comprises major-minor valve integrated type, guide's sealing configuration is positioned at electromagnetic relief valve on the upside of main valve clack and the auxiliary valve of main valve is the electromagnetic relief valve that split type, guide's sealing configuration is arranged on auxiliary valve.Its major technique key is: the downside of the valve gap being positioned at main valve or auxiliary valve is provided with guide's valve seat, and guide's valve seat and valve gap are connected and sealed; Described guide's sealing configuration, its sealing surface performing switching motion is set directly on valve rod, is positioned at the bottom of valve rod, guide's valve seat is provided with the sealing surface-sealing surface of seat matched with the valve stem seal face of stem lower portion, valve stem seal face is sphere, sealing surface of seat is the downward conical surface in direction of dehiscing, and coincide both during closedown with tangent state; One section of cylindrical section is arranged with from the external diameter in the valve stem seal face of stem lower portion is past, this cylindrical section downwards then external diameter increase another section of cylndrical surface-stem guiding face being configured for end bearing guiding under valve rod, at the sealing surface of seat of first guide valve seat toward being arranged with the cylindrical hole-valve seat guide surface coordinated with above-mentioned stem guiding face.
In order to realize expecting object better, the utility model also adds following further technological scheme simultaneously:
The high hardness cobalt base alloy of valve stem seal face and equal built-up welding HRC >=50 of sealing surface of seat.
Groove-thermal compensation the groove of annular is provided with at the dorsal part in valve stem seal face.
Toroidal cavity on the upside of the valve seat guide surface of guide's valve seat and between valve stem seal face external diameter cylindrical section is down outside, be drilled with uniform some through holes-side through flow hole, be also drilled with uniform some through holes-lower through flow hole in lower end surface, stem guiding face toward above-mentioned toroidal cavity.
Electromagnetic relief valve described in the utility model, its driving mechanism comprises the driving mechanism being provided active force by electromagnet, and provides the driving mechanism of active force by electromagnetic valve Pneumatic actuator.
The beneficial effects of the utility model are: after adopting guide's sealing configuration of the electromagnetic relief valve described in the technical solution of the utility model, the operational safety of guide's sealing configuration can be improved, sealing surface can reach state of better coincideing, sealability is better, is more conducive to speed of response when ensureing valve opening.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of guide's sealing configuration of existing electromagnetic relief valve product.
Fig. 2 is the schematic diagram of the utility model embodiment one.
Fig. 3 is the schematic diagram of the utility model embodiment two.
Fig. 4 is the partial enlarged drawing at the sealing surface position of structure shown in embodiment one, two.
In figure, 1, valve gap; 2, valve rod; 2-1, valve stem seal face; 2-2, thermal compensation groove; 2-3, stem guiding face; 2-4, lower through flow hole; 3, guide's valve seat; 3-1, sealing surface of seat; 3-2, valve seat guide surface; 3-3, side through flow hole; 4, auxiliary valve body.
Embodiment
Below in conjunction with drawings and Examples, the technical solution of the utility model is further elaborated.
Embodiment one
The schematic diagram of guide's sealing configuration of the present embodiment as shown in Figure 2.This guide's sealing configuration the valve that is suitable for be major-minor valve integrated type, guide's sealing configuration is arranged on electromagnetic relief valve on the upside of main valve clack.
Specific embodiments is as follows: in the downside of valve gap (1) being positioned at main valve, guide's valve seat (3) is set, guide's valve seat (3) and valve gap (1) are connected and sealed by screw thread and sealing gasket, sealing gasket is positioned at threaded lower end, valve gap (1) lower surface step plane place, the mode that also can adopt and be connected and sealed by screw thread and seal weld or be connected and sealed by weld seam that is tightly connected of certain guide's valve seat (3) and valve gap (1), its effect is the same with the connection effect of screw thread+sealing gasket, as long as can ensure cut off completely between the exhaust passage in the downside of guide's valve seat (3) and outside and valve gap (1), guarantee seals.Described guide's sealing configuration, its sealing surface performing switching motion is set directly at the bottom that valve rod (2) is upper, be positioned at valve rod (2), and namely the valve rod in existing product structure and guide's flap being separated design improvement is overall structure; Guide's valve seat (3) is provided with sealing surface one sealing surface of seat (3-1) corresponding with the valve stem seal face (2-1) of valve rod (2) bottom, valve stem seal face (2-1) is sphere, sealing surface of seat (3-1) is the downward conical surface in direction of dehiscing, and coincide (see Fig. 4) both during closedown with tangent state; In the present embodiment, the cone angle of sealing surface of seat (3-1) is set to 60 °.One section of cylindrical section is arranged with from the external diameter in the valve stem seal face (2-1) of valve rod (2) bottom is past, this cylindrical section downwards then external diameter increase another section of cylndrical surface-stem guiding face (2-3) being configured for end bearing guiding under valve rod (2), sealing surface of seat (3-1) in first guide valve seat (3) down, is provided with the cylindrical hole-valve seat guide surface (3-2) coordinated with above-mentioned stem guiding face (2-3).
The present embodiment also has some following vibrational power flow in guide's sealing configuration:
Valve stem seal face (2-1) and sealing surface of seat (3-1) are formed, the high hardness cobalt base alloy of two equal built-up welding HRC >=50 of sealing surface by built-up welding and the processing of piling postwelding.
At the dorsal part of valve stem seal face (2-1), the groove-thermal compensation groove (2-2) of annular is set.
Toroidal cavity between valve seat guide surface (3-2) upside and valve stem seal face (2-1) external diameter cylindrical section down of guide's valve seat (3) is outside, be drilled with uniform some through holes-side through flow hole (3-3), be also drilled with uniform some through holes-lower through flow hole (2-4) in stem guiding face (2-3) lower end surface toward above-mentioned toroidal cavity.
Separating to design and change above-mentioned overall structure into existing product structure valve rod and guide's flap, can overcome that size because of linkage structure is less, guide's flap is brittle material, the problem of more complicated the brought poor reliability of structure, valve stem seal face adopts the mode of built-up welding cobalt base hard alloy to be formed, overall structure can be made to keep preferably comprehensive mechanical performance, make guide's sealing configuration have higher reliability.
Sealing surface of seat (3-1) is designed to the conical surface, be conducive to less at sealing surface diameter, axially fasten the also less state of power under make sealing surface obtain enough seal pressures by the amplification of cone structure to power.The cone angle of usual conical surface seal is by 60 ° ~ 70 ° designs, and the present embodiment, in order to improve the sealability at guide's sealing surface place, processes sealing surface by the comparatively Small Tapers of 60 °; Sealing pair adopts the structure of sphere-conical surface, sealing pair can be made to obtain state of more preferably coincideing, for the plane sealing of existing product or the sealing configuration of the conical surface-conical surface, more contribute to the sealability improving product.In addition, the high hardness cobalt base alloy of sealing surface weld deposit HRC >=50 also enables sealing surface place obtain good resistance to compression, against corrosion, scour resistance, thus guide's sealing surface is obtained better, more lasting sealing.
Stem guiding face (2-3) can make the lower end of integrated type valve rod obtain reliable guide-localization by means of the guide-localization effect of valve seat guide surface (3-2), be conducive to ensureing valve stem seal face (2-1) and sealing surface of seat (3-1) accurate in and good agreement.
The thermal compensation groove (2-2) of valve stem seal face (2-1) dorsal part, by increasing the area that valve stem seal face (2) back surface contacts with high temperature media and the distance reducing high temperature media and uper side surface, more heat can be allowed upwards to transmit, the temperature difference in the interior outside at sealing surface position is significantly reduced, thus valve stem seal face (2) uneven thermal deformation when high temperature can be made to be controlled better and then to make auxiliary valve guide seal the sealing reliability at position and be enhanced sealing life.
Through flow hole (2-4) under the side through flow hole (3-3) simultaneously arranged; with existing product only compared with the mode of guide structure place perforate; during secondary valve unlatching discharged steam, required flow area is guaranteed, thus ensure that the Valve opening velocity of valve can meet the needs of unit safety protection better.
Embodiment two
The schematic diagram of guide's sealing configuration of the present embodiment as shown in Figure 3.This guide's sealing configuration the valve that is suitable for that to be the auxiliary valve of main valve be is split type, guide's sealing configuration is arranged on electromagnetic relief valve on auxiliary valve.
Specific embodiments: in the downside of valve gap (1) being positioned at auxiliary valve body (4) upper end, be provided with guide's valve seat (3), guide's valve seat (3) and valve gap (1) are connected and sealed by screw thread and sealing gasket, sealing gasket is positioned at the valve gap (1) of threaded upper end and the cylindrical place of guide's valve seat (3), the mode that also can adopt and be connected and sealed by screw thread and seal weld or be connected and sealed by weld seam that is tightly connected of certain guide's valve seat (3) and valve gap (1), its effect is the same with the connection effect of screw thread+sealing gasket, as long as can ensure cut off completely between the exhaust passage in guide's valve seat (3) downside and outside and valve gap (1), guarantee seals.Described guide's sealing configuration, its sealing surface performing switching motion is set directly at the bottom that valve rod (2) is upper, be positioned at valve rod (2); Guide's valve seat (3) is provided with the sealing surface-sealing surface of seat (3-1) corresponding with valve stem seal face (2-1), valve stem seal face (2-1) is sphere, sealing surface of seat (3-1) is the conical surface, coincide (Fig. 4) both during closedown with tangent state.One section of cylindrical section is arranged with from the external diameter in the valve stem seal face (2-1) of valve rod (2) bottom is past, this cylindrical section downwards then external diameter increase another section of cylndrical surface-stem guiding face (2-3) being configured for end bearing guiding under valve rod (2), sealing surface of seat (3-1) in first guide valve seat (3) down, is provided with the cylindrical hole-valve seat guide surface (3-2) coordinated with above-mentioned stem guiding face (2-3).The high hardness cobalt base alloy of valve stem seal face (2-1) and sealing surface of seat (3-1) built-up welding HRC >=50; Valve stem seal face (2-1) dorsal part is also provided with thermal compensation groove (2-2); Outside from the toroidal cavity between valve seat guide surface (3-2) upside and valve stem seal face (2-1) external diameter cylindrical section down, be drilled with uniform some sides through flow hole (3-3), be also drilled with uniform lower through flow hole (2-4) in stem guiding face (2-3) lower end surface toward above-mentioned toroidal cavity.
The structural principle of above-mentioned enforcement structure is substantially identical with embodiment one with effect, does not therefore separately do to apply and states.
All the other contents be not described in detail of this specification belong to the known prior art of professional and technical personnel in the field.
Below done to illustrate to the technical solution of the utility model in conjunction with the accompanying drawings and embodiments, but these accompanying drawings and explanation can not be understood to limit scope of the present utility model.Those skilled in the art should know; the utility model is not subject to the restriction of above-described embodiment and accompanying drawing; its protection domain defined by appending claims; any in the technological scheme not exceeding the various changes in the scope that the utility model claims define, modification is formed; all do not depart from spirit of the present utility model and technical spirit, still can belong within right of the present utility model.
Claims (4)
1. guide's sealing configuration of an electromagnetic relief valve, described electromagnetic relief valve comprises major-minor valve integrated type, guide's sealing configuration is positioned at the electromagnetic relief valve on the upside of main valve clack and major-minor valve is split type, guide's sealing configuration is arranged on electromagnetic relief valve on auxiliary valve, it is characterized in that: the downside of the valve gap (1) being positioned at main valve or auxiliary valve is provided with guide's valve seat (3), guide's valve seat (3) and valve gap (1) are connected and sealed; Described guide's sealing configuration, its sealing surface performing switching motion is set directly at the bottom that valve rod (2) is upper, be positioned at valve rod (2), guide's valve seat (3) is provided with the sealing surface-sealing surface of seat (3-1) matched with the valve stem seal face (2-1) of valve rod (2) bottom, valve stem seal face (2-1) is sphere, sealing surface of seat (3-1) is the downward conical surface in direction of dehiscing, and coincide both during closedown with tangent state; One section of cylindrical section is arranged with from the external diameter in the valve stem seal face (2-1) of valve rod (2) bottom is past, this cylindrical section downwards then external diameter increase another section of cylndrical surface-stem guiding face (2-3) being configured for end bearing guiding under valve rod (2), the sealing surface of seat (3-1) in first guide valve seat (3) is toward being arranged with the cylindrical hole-valve seat guide surface (3-2) coordinated with above-mentioned stem guiding face (2-3).
2. guide's sealing configuration of electromagnetic relief valve according to claim 1, is characterized in that: the high hardness cobalt base alloy of equal built-up welding HRC >=50 of valve stem seal face (2-1) and sealing surface of seat (3-1).
3. guide's sealing configuration of electromagnetic relief valve according to claim 1, is characterized in that: the groove-thermal compensation groove (2-2) being provided with annular at the dorsal part of valve stem seal face (2-1).
4. guide's sealing configuration of electromagnetic relief valve according to claim 1, it is characterized in that: the toroidal cavity between valve seat guide surface (3-2) upside and valve stem seal face (2-1) external diameter cylindrical section down of guide's valve seat (3) is outside, be drilled with uniform some through holes-side through flow hole (3-3), be also drilled with uniform some through holes-lower through flow hole (2-4) in stem guiding face (2-3) lower end surface toward above-mentioned toroidal cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420777521.3U CN204420293U (en) | 2014-12-08 | 2014-12-08 | Guide's sealing configuration of electromagnetic relief valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420777521.3U CN204420293U (en) | 2014-12-08 | 2014-12-08 | Guide's sealing configuration of electromagnetic relief valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204420293U true CN204420293U (en) | 2015-06-24 |
Family
ID=53470664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420777521.3U Expired - Fee Related CN204420293U (en) | 2014-12-08 | 2014-12-08 | Guide's sealing configuration of electromagnetic relief valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204420293U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107448642A (en) * | 2016-05-31 | 2017-12-08 | 浙江三花汽车零部件有限公司 | A kind of heat control valve |
| CN107752750A (en) * | 2016-08-19 | 2018-03-06 | 佛山市顺德区美的电热电器制造有限公司 | Electric cooker |
| JP2019517647A (en) * | 2016-05-31 | 2019-06-24 | ジャージャン サンフア オートモーティヴ コンポーネンツ カンパニー リミテッド | Thermostatic valve |
-
2014
- 2014-12-08 CN CN201420777521.3U patent/CN204420293U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107448642A (en) * | 2016-05-31 | 2017-12-08 | 浙江三花汽车零部件有限公司 | A kind of heat control valve |
| JP2019517647A (en) * | 2016-05-31 | 2019-06-24 | ジャージャン サンフア オートモーティヴ コンポーネンツ カンパニー リミテッド | Thermostatic valve |
| CN107448642B (en) * | 2016-05-31 | 2019-09-17 | 浙江三花汽车零部件有限公司 | A kind of heat control valve |
| US10948096B2 (en) | 2016-05-31 | 2021-03-16 | Zhejiang Sanhua Automotive Components Co., Ltd. | Temperature regulating valve |
| CN107752750A (en) * | 2016-08-19 | 2018-03-06 | 佛山市顺德区美的电热电器制造有限公司 | Electric cooker |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204420293U (en) | Guide's sealing configuration of electromagnetic relief valve | |
| CN201326823Y (en) | Corrugated pipe stop valve for chlorine | |
| CN104653791A (en) | Splitting type valve seat self-adjustable sealing three-eccentric butterfly valve | |
| CN103527787B (en) | A kind of control valve for power station adopting the metal sealing coil structures of convenient disassembly | |
| CN203516886U (en) | Pilot-operated balance valve element of adjusting-type valve | |
| CN206398089U (en) | It is new to idle discharge vapour stop valve | |
| CN105526442A (en) | High-pressure-resistant self-sealing rotary compensator | |
| CN202659955U (en) | Top-mounted low-temperature fixed ball valve | |
| CN103470793A (en) | Double-slope eccentric butterfly valve | |
| CN203627966U (en) | Cage type double-base adjusting valve with metal elastic C-shaped sealing ring component | |
| CN102705525A (en) | Top-entry low-temperature fixed ball valve | |
| CN103821949A (en) | Cascading valve clack type adjusting valve | |
| CN204420143U (en) | The safeguard structure of electromagnetic relief valve guide sealing surface | |
| CN203500514U (en) | Eccentric butterfly valve with two inclined planes | |
| CN104482262A (en) | Lateral steam discharge electromagnetic pressure relief valve structure for electric station main steam system | |
| CN108708979A (en) | Bidirection press self-balance stop valve | |
| CN203500489U (en) | Floating valve seat balanced-type high-temperature regulating cutoff valve | |
| CN204628668U (en) | Power station main steam system side steam discharge electromagnetic relief valve structure | |
| CN204533568U (en) | Split type valve seat self-adjusting seal three eccentric butterfly valve | |
| CN107917205A (en) | A kind of soft seal three-eccentric-butterfly-valve | |
| CN207064699U (en) | A kind of integral type HTHP seal ball-valve | |
| CN210240600U (en) | Helium-level elastic double-sealing stop valve clack structure | |
| CN210240596U (en) | Helium-level packing double-seal stop valve clack structure | |
| CN204420298U (en) | The thermal compensation structure in electromagnetic relief valve valve stem seal face | |
| CN206159585U (en) | Self -operated adjusting valve |
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 |
Granted publication date: 20150624 Termination date: 20171208 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |