CN204498453U - A kind of disc negative electrode - Google Patents
A kind of disc negative electrode Download PDFInfo
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- CN204498453U CN204498453U CN201520233853.XU CN201520233853U CN204498453U CN 204498453 U CN204498453 U CN 204498453U CN 201520233853 U CN201520233853 U CN 201520233853U CN 204498453 U CN204498453 U CN 204498453U
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Abstract
A kind of disc negative electrode, relate to plasma apparatus, it is characterized in that the disk front center of disc negative electrode has bossy body, the bossy body of disk front center forms cathode taps, and the front end of cathode taps is arc surface structure, and there is puff prot at the center of cathode taps, end face around puff prot forms discharge end, have screw at disc periphery along on body, screw is more than two, is evenly distributed; The disk posterior center of disc negative electrode has bell and spigot, and there is sealing circular groove bell and spigot rear end, and bell and spigot communicates with puff prot, disc periphery along body rear end form sealing plane.The utility model improves the efficiency of heating surface of Plasma gasification spray gun; make water-molecule dissociation rate higher, fast the heat of negative electrode is shifted out spray gun, cooling effect is better; the negative electrode of article on plasma spray gun body carries out more available protecting, avoids shift cathode and cooling water to leak.
Description
Technical field
The utility model relates to plasma apparatus, particularly relates to a kind of plasma torch.
Background technology
Current, plasma technology is widely used, is industrially applied to plasma ignition, plasma spraying, metal smelt, heating plasma manufacture nano material, cutting, the process of waste incineration refuse etc.Plasma is a kind of state formed by ionic discharge phenomenon, will generate excited atom, excites molecule, reaction that the chemicals of the activity chemistry thing of dissociation atom, free atomic group, atom or molecular ion group and they and other collide and cause along with electric discharge.In plasma torch, discharge process makes work gas molecule lose outer-shell electron and form ionic condition, high temperature is produced through mutually colliding, the central temperature of plasma flare can up to more than tens thousand of degree Celsius, torch lip temperature also can reach more than thousands of degree, when processed material is subject to high-temperature plasma impact, its molecule will decompose, atom will reconfigure and generate new material, makes harmful substance become innocuous substance.
On coal gasification production line, when water vapour by pyrolysis after carry out gas making reaction with coal, coal is more easily gasified, improves the rate of gasification of coal, realize saving coal resources; In house refuse or industrial organic wastes disposal system, when water vapour by pyrolysis after with carry out gasification reaction with house refuse or industrial organic wastes again time, the synthesis gas quality better making it transform, reaches the requirement of industrial chemicals, realizes recycling.Hydrone is a kind of material of quite stable, in atmospheric conditions, temperature hydrone when 2000K decomposes hardly, the water of 25% is had to decompose during 2500K, during 3400 ~ 3500K, the molar fraction of hydrogen and oxygen reaches maximum, be respectively 18% and 6%, when temperature reaches more than 4200K, hydrone will all be decomposed into hydrogen, oxygen, active hydrogen atom, active oxygen atom and reactive hydrogen oxygen atomic group, but, general mode of heating is difficult to reach so high temperature, uses plasma torch then can accomplish.
In existing Plasma gasification spray gun, entered region of discharge by the gas heated from the periphery of negative electrode, water vapour not easily enters the central area of torch, and therefore, existing Plasma gasification spray gun exists the low shortcoming of water-molecule dissociation rate.The negative electrode of plasma torch is the parts of electron emission, and because the high temperature of the impact and tens thousand of degree of bearing electric current burns, therefore, the head of negative electrode is easy to ablated and causes damage, not only affects production, and increases production cost.
Chinese patent notification number CN203851357U discloses " a kind of plasma heating decomposer ", by anode jacket, anode, negative electrode pedestal, negative electrode and insulating frame composition, wherein, negative electrode pedestal is the rotary structure that axis protrudes forward, the axis of negative electrode pedestal is through hollow-core construction, negative electrode is embedded in the interior space of negative electrode pedestal axis, the head end sidewall of negative electrode fits closely in the front end wall body of negative electrode pedestal axis, the tail end of negative electrode fits closely in the wall body of negative electrode pedestal rear end, between the body of rod outer wall of negative electrode and the inwall of negative electrode pedestal axis, space forms water jacket, feed gas passage is had in the body of rod of negative electrode, feed gas passage has unstripped gas input interface to access, there is unstripped gas spout at the head end center of negative electrode, feed gas passage passes through unstripped gas spout connection to contraction chamber.This patent sprays into water vapour the region of discharge in contraction chamber by the spout at negative electrode head end center, water vapor absorption is made to obtain preheating to the heat of negative electrode head end, anticathode head end has cooling effect simultaneously, overcomes the shortcoming of the easy ablation of Conventional plasma spray gun body electrode.But, because this patent takes the measure of " the head end sidewall of negative electrode fits closely in the front end wall body of negative electrode pedestal axis; the tail end of negative electrode fits closely in the wall body of negative electrode pedestal rear end " to carry out water jacket sealing, the effect of expanding with heat and contract with cold of material will make negative electrode loosen, cause shift cathode unreliable with sealing, cooling water in water jacket easily leaks into the region of discharge in contraction chamber, has influence on spray gun and normally works.
Utility model content
The purpose of this utility model is the shortcoming that will overcome existing plasma torch; improve the efficiency of heating surface of Plasma gasification spray gun; make water-molecule dissociation rate higher; avoid shift cathode; cooling water can not leak; and the negative electrode of article on plasma spray gun body carries out available protecting, Plasma gasification spray gun can be met, and coal gasification is produced, the application requirement of solid waste disposal field and ignition of the boiler.
A kind of disc negative electrode of the present utility model, it is characterized in that the disk front center of disc negative electrode has bossy body, the bossy body of disk front center forms cathode taps, there is puff prot (2-2) at the center of cathode taps, puff prot (2-2) end face around forms discharge end (2-3), the disk posterior center of disc negative electrode has bell and spigot (2-5), and bell and spigot (2-5) communicates with puff prot (2-2), disc periphery along body rear end form sealing plane (2-6).
In the utility model, at disc periphery along body there being screw (2-1), screw (2-1) is more than two, is evenly distributed; The front end of cathode taps is arc surface structure; There is sealing circular groove (2-4) bell and spigot (2-5) rear end of disk posterior center.
Disc negative electrode of the present utility model is arranged on plasma torch to be applied, plasma torch is made up of disc negative electrode, insulating base (1), separator (9) and anode (3), wherein, insulating base (1) is the hollow rotary structure of two sections of reducings, hollow path is in the back segment of insulating base (1), the large footpath of hollow is in the leading portion of insulating base (1), the front end face of hollow path section forms seal face (1-3), there is rear port (1-7) at the back-end central of hollow path section, have front port (1-2) in the front end of hollow large footpath section; Disc negative electrode is arranged on the front end of the hollow path of insulating base (1), and the sealing plane (2-6) on disc negative electrode is close to sealing with the seal face (1-3) in insulating base (1); In insulating base (1), have bolt through-hole (1-5), the quantity of bolt through-hole (1-5) is equal with screw (2-1) quantity on disc negative electrode, and the position of bolt through-hole (1-5) coordinates with screw (2-1) position of disc negative electrode; There is closure gasket groove (1-6) in the rear end of bolt through-hole (1-5), in closure gasket groove (1-6), have sealing gasket (6); In bolt through-hole (1-5), have bolt (8), the spiral shell head of bolt (8) is screwed in the screw (2-1) on disc negative electrode, and disc negative electrode is positioned in insulating base (1).The front portion of separator (9) is isolated tube (9-2), and the interior space of isolated tube (9-2) forms gas channel (VIII), and there is heat medium input port (9-1) rear end of separator (9), and heat medium input port (9-1) communicates with gas channel (VIII).Separator (9) is arranged in the rear port (1-7) of insulating base (1), the isolated tube (9-2) of separator (9) front portion extend in the bell and spigot (2-5) of disc negative electrode through space in the hollow path of insulating base (1), gas channel (VIII) is communicated to the puff prot (2-2) of disc negative electrode, space looping cooling chamber (VII) in the hollow path of insulating base (1), annular cooling chamber (VII) has cooling water input interface (1-4) to access and cooling water output interface (1-8) picks out, and the disk rear end of disc negative electrode forms radiating surface; Anode (3) is arranged on the front port (1-2) of insulating base (1).
The utility model is positioned at disc negative electrode securely in insulating base (1) by bolt (8) and can not be subjected to displacement, and make the sealing plane on disc negative electrode (2-6) be close to sealing with the seal face (1-3) in insulating base (1), can not loosen because expanding with heat and contract with cold, make sealing reliable, can not leak, thus guarantee that plasma torch can normally work.The utility model is disc structure cathode design, the radiating surface of disk rear end is made more to press close to cooling water input interface (1-4) and cooling water output interface (1-8), the stroke of cooling water in spray gun is shorter, shift out spray gun with the heat fast negative electrode, there is the better feature of cooling effect.The cathode construction of disc is simpler, and requirement on machining accuracy is low, and it is easier therefore to process, and can cut down finished cost.
In plasma apparatus, the effect of negative electrode is electron emission, and the plasma-arc arc root on negative electrode concentrates on the center of negative electrode head end, and temperature is the highest, and therefore, the center of negative electrode head end is the most ablated.The utility model takes water vapour or industrial harmful gas to be injected to the center of plasma arc arc root by the puff prot (2-2) at cathode taps center; water vapour or industrial harmful gas is made to absorb the heat at cathode taps center; the center of cathode taps obtains quick heat radiating; simultaneously; the gas sprayed from the puff prot (2-2) at cathode taps center forms shielding gas flow; available protecting is carried out in the central area of target head, avoid or slowing down cathode head ablated.In the utility model, the head end of cathode taps is processed into circular arc end face, and work gas washes away the circular arc type head end of cathode taps in a rotative pattern, and the area discharged is increased, the arc root of plasma arc is dispersed on circular arc end face, avoids local temperature too high and ablation negative electrode.
In above-mentioned utility model, adopt bolt (8) that disc negative electrode is positioned in insulating base (1) securely, negative electrode can not be subjected to displacement, and make the sealing plane on disc negative electrode (2-6) be close to sealing with the seal face (1-3) in insulating base (1), can not loosen because expanding with heat and contract with cold, make sealing reliable, can not leak, thus guarantee that plasma torch can normally work.
In the specific implementation, insulating base (1) and separator (9) select polytetrafluoroethylmaterial material to make to above-mentioned utility model; Disc negative electrode (2) selects tungsten lanthanum Zirconium alloy material or chrome zirconium copper alloy material to make; Anode (3) selects chrome zirconium copper alloy material to make.
The beneficial effects of the utility model are: a kind of disc negative electrode provided; apply in plasma torch; overcome the shortcoming of existing plasma torch; fast the heat of negative electrode is shifted out spray gun; cooling effect is better; the negative electrode of article on plasma spray gun body carries out more available protecting, avoids shift cathode and cooling water to leak.The utility model improves the efficiency of heating surface of Plasma gasification spray gun, makes water-molecule dissociation rate higher, and Plasma gasification spray gun of the present utility model can meet that coal gasification is produced, the application requirement of solid waste disposal field and ignition of the boiler.
Accompanying drawing explanation
Fig. 1 is a kind of disc cathode junction composition of the present utility model.
Fig. 2 is the A-A profile of Fig. 1.
Fig. 3 is the dielectric base structure figure in plasma torch.
Fig. 4 is the B-B cutaway view of Fig. 3.
Fig. 5 is the structure chart applied in plasma torch of the present utility model.
In figure: 1. insulating base, 1-1. work gas interface, 1-2. front port, 1-3. seal face, 1-4. cooling water input interface, 1-5. bolt through-hole, 1-6. closure gasket groove, 1-7. rear port, 1-8. cooling water output interface, 2. disc negative electrode, 2-1. screw, 2-2. puff prot, the discharge end of 2-3. negative electrode, 2-4. seals circular groove, 2-5. bell and spigot, 2-6. sealing plane, 3. anode, 3-1. installs spiral shell head, the shell of 3-2. anode, 3-3. coolant outlet, the jet pipe of 3-4. anode, the discharge face of 3-5. anode, 3-6. electric interfaces, 3-7. coolant inlet, the location tenon of 3-8. eddy flow circle, 4. eddy flow circle, 5. sealing ring, 6. sealing gasket, 7. plain washer, 8. bolt, 9. separator, 9-1. heat medium input port, 9-2. isolated tube, I. the cooling jacket of anode, II. spray chamber, III. compression duct, IV. region of discharge, V. tangential air drain, VI. ring-shaped air chamber, VII. annular cooling chamber, VIII. gas channel.
Embodiment
embodiment 1in execution mode shown in Fig. 1 and Fig. 2, the disk front center of disc negative electrode has bossy body, the bossy body of disk front center forms cathode taps, the front end of cathode taps is arc surface structure, there is puff prot (2-2) at the center of cathode taps, puff prot (2-2) end face around forms discharge end (2-3), the disk posterior center of disc negative electrode has bell and spigot (2-5), there is sealing circular groove (2-4) rear end of bell and spigot (2-5), bell and spigot (2-5) communicates with puff prot (2-2), disc periphery along body rear end form sealing plane (2-6), at disc periphery along body there being four screws (2-1), four screws (2-1) are evenly distributed.
The disc negative electrode of the present embodiment is arranged on plasma torch to be applied, plasma torch is made up of disc negative electrode, insulating base (1), separator (9) and anode (3), wherein, insulating base (1) is the hollow rotary structure of two sections of reducings, hollow path is in the back segment of insulating base (1), the large footpath of hollow is in the leading portion of insulating base (1), the front end face of hollow path section forms seal face (1-3), there is rear port (1-7) at the back-end central of hollow path section, have front port (1-2) in the front end of hollow large footpath section; Disc negative electrode is arranged on the front end of the hollow path of insulating base (1), and the sealing plane (2-6) on disc negative electrode is close to sealing with the seal face (1-3) in insulating base (1); In insulating base (1), have bolt through-hole (1-5), the quantity of bolt through-hole (1-5) is equal with screw (2-1) quantity on disc negative electrode, and the position of bolt through-hole (1-5) coordinates with screw (2-1) position of disc negative electrode; There is closure gasket groove (1-6) in the rear end of bolt through-hole (1-5), in closure gasket groove (1-6), have sealing gasket (6); In bolt through-hole (1-5), have bolt (8), the spiral shell head of bolt (8) is screwed in the screw (2-1) on disc negative electrode, and disc negative electrode is positioned in insulating base (1).The front portion of separator (9) is isolated tube (9-2), and the interior space of isolated tube (9-2) forms gas channel (VIII), and there is heat medium input port (9-1) rear end of separator (9), and heat medium input port (9-1) communicates with gas channel (VIII).Separator (9) is arranged in the rear port (1-7) of insulating base (1), the isolated tube (9-2) of separator (9) front portion extend in the bell and spigot (2-5) of disc negative electrode through space in the hollow path of insulating base (1), gas channel (VIII) is communicated to the puff prot (2-2) of disc negative electrode, space looping cooling chamber (VII) in the hollow path of insulating base (1), annular cooling chamber (VII) has cooling water input interface (1-4) to access and cooling water output interface (1-8) picks out, and the disk rear end of disc negative electrode forms radiating surface; Anode (3) is arranged on the front port (1-2) of insulating base (1).
embodiment 2in execution mode shown in Fig. 5, the plasma torch of pyrolysis purposes is by disc negative electrode (2), insulating base (1), separator (9) and anode (3) composition, wherein, the disk front center of disc negative electrode (2) has bossy body, the bossy body of disk front center forms cathode taps, cathode taps front end on disc negative electrode (2) is arc surface structure, there is puff prot (2-2) at the center of cathode taps, at disc negative electrode (2) along body there being four screws (2-1), four screws (2-1) are evenly distributed, the disk posterior center of disc negative electrode (2) has bell and spigot (2-5), there is sealing circular groove (2-4) rear end of bell and spigot (2-5), sealing ring (5) is had in sealing circular groove (2-4), bell and spigot (2-5) communicates with puff prot (2-2), disc periphery along body rear end form sealing plane (2-6), insulating base (1) is the hollow rotary structure of two sections of reducings, hollow path is in the back segment of insulating base (1), the large footpath of hollow is in the leading portion of insulating base (1), the front end face of hollow path section forms seal face (1-3), rear port (1-7) is had at the back-end central of hollow path section, front port (1-2) is had in the front end of hollow large footpath section, four bolt through-holes (1-5) are had in insulating base (1), the position of four bolt through-holes (1-5) coordinates with screw (2-1) position of disc negative electrode (2), closure gasket groove (1-6) is had in the rear end of bolt through-hole (1-5), sealing gasket (6) is had in closure gasket groove (1-6), the front portion of separator (9) is isolated tube (9-2), and the interior space of isolated tube (9-2) forms gas channel (VIII), and there is heat medium input port (9-1) rear end of separator (9), and heat medium input port (9-1) communicates with gas channel (VIII), anode (3) is made up of jet pipe (3-4) and shell (3-2), jet pipe (3-4) is in axially through structure, there is compression duct (III) at rear portion in jet pipe (3-4), compression duct (III) is circular straight hole structure, the rear end of compression duct (III) is the bell-mouth structure of air narrowed, the front end of compression duct (III) is the conical structure of flaring, the cone-shaped space of compression duct (III) front end forms spray chamber (II), shell (3-2) is enclosed in the periphery of jet pipe (3-4), interior space between shell (3-2) and jet pipe (3-4) forms cooling jacket (I), cooling jacket (I) has coolant inlet (3-7) to access and coolant outlet (3-3) picks out, disc negative electrode (2) is arranged on the front end of the hollow path of insulating base (1), by bolt (8), disc negative electrode (2) is positioned in insulating base (1), bolt (8) is through bolt through-hole (1-5), the spiral shell head of bolt (8) is screwed in the screw (2-1) on disc negative electrode (2), and the sealing plane (2-6) on disc negative electrode (2) is close to sealing with the seal face (1-3) in insulating base (1), separator (9) is arranged in the rear port (1-7) of insulating base (1), the isolated tube (9-2) of separator (9) front portion extend in the bell and spigot (2-5) of disc negative electrode (2) through space in the hollow path of insulating base (1), gas channel (VIII) is communicated to the puff prot (2-2) of disc negative electrode (2), space looping cooling chamber (VII) in the hollow path of insulating base (1), annular cooling chamber (VII) has cooling water input interface (1-4) to access and cooling water output interface (1-8) picks out, the disk rear end of disc negative electrode (2) forms radiating surface, anode (3) is arranged on the front port (1-2) of insulating base (1), have at the rear portion of anode casing (3-2) and spiral shell head (3-1) is installed, anode (3) is arranged on the front port (1-2) of insulating base (1) in threaded engagement mode, space looping air chamber (VI) in the large footpath of hollow of insulating base (1), ring-shaped air chamber (VI) has work gas interface (1-1) to access, and ring-shaped air chamber (VI) is communicated in the horn mouth space of compression duct (III) rear end of anode, cathode taps is placed in the horn mouth space of compression duct (III) rear end of anode, eddy flow circle (4) is had between disc negative electrode (2) and the rear end of anode (3), eddy flow circle (4) there is tangential air drain (V), ring-shaped air chamber (VI) is communicated in the horn mouth space of compression duct (III) rear end in anode by tangential air drain (V), and the rear end of anode (3) has the location tenon (3-8) of eddy flow circle (4), puff prot (2-2) end face around forms discharge end (2-3), and the horn mouth space of compression duct (III) rear end forms region of discharge (IV), and jet pipe (3-4) inwall of compression duct (III) front end forms discharge face (3-5).In the present embodiment, insulating base (1) and separator (9) select polytetrafluoroethylmaterial material to make; Disc negative electrode (2) selects tungsten lanthanum Zirconium alloy material or chrome zirconium copper alloy material to make; Anode (3) selects chrome zirconium copper alloy material to make.
The present embodiment is used for industrial harmful gas process and steam heating decomposes, during concrete enforcement, the shell (3-2) of anode there is electric interfaces (3-6), by the shell (3-2) of anode, electrical communication is carried out to jet pipe (3-4), the positive pole of working power is connected on the electric interfaces (3-6) of anode, the negative pole of working power is connected on disc negative electrode (2) by bolt (8), the feed pipe of cooling water is connected respectively on cooling water input interface (1-4) and on coolant inlet (3-7), the return pipe of cooling water is connected respectively on cooling water output interface (1-8) and on coolant outlet (3-3), the air supply pipe of work gas is connected on work gas interface (1-1), the appendix of heat medium is connected on heat medium input port (9-1).During work, a road cooling water flows there through in annular cooling chamber (VII), washes away cooling, by current, the heat of negative electrode is removed fast disc negative electrode (2), another road cooling water enters into the cooling jacket (I) of anode, and the jet pipe (3-4) of antianode cools, and by current, the heat of anode is removed fast, work gas enters into ring-shaped air chamber (VI), then enters into region of discharge (IV) by tangential air drain (V) in swirling eddy mode, when applying electric energy between anode (3) and disc negative electrode (2), puff prot (2-2) the periphery just electron emission of cathode taps, form the plasma arc of high temperature, plasma arc enters into spray chamber (II) by compression duct (III), when plasma arc is by compression duct (III), electric arc is compressed, plasma arc is heated up further, on the discharge face (3-5) of upper and anode nozzle (3-4) inwall of the arc root of the plasma arc discharge end (2-3) respectively in cathode taps front end, plasma flare sprays from the spray chamber (II) in anode nozzle (3-4), the plasma arc arc root of discharge end (2-3) is distributed in puff prot (2-2) periphery of cathode taps, industrial harmful gas or water vapour spray into region of discharge (IV) from the center puff prot (2-2) of cathode taps front end, industrial harmful gas or water vapour enter into the center of plasma arc from the center of plasma arc arc root, the concentration of energy of plasma arc is made to act on industrial harmful gas or water vapour, industrial harmful gas or the easier decomposes of water vapour, therefore, heating-up temperature and the efficiency of heating surface higher, simultaneously, industrial harmful gas or water vapour are when by puff prot (2-2), airflow scouring is carried out at the center of target head front end, take away heat fast, target head is protected, prevent ablation.In said process, industrial harmful gas is carried out high-temperature activation decomposition, atoms recombine and generate new innocuous substance; Or water vapour is carried out high-temperature activation decomposition, generate the activity chemistry thing of hydrogen and oxygen, as the gasifying agent that coal gasification or solid organic waste substances gasify, the heat energy of high-temperature plasma is discharged in gasification furnace, is supplied to needed for raw material stoving and pyrolysis.Described work gas comprises air, nitrogen, argon gas or hydrogen one wherein, described heat medium comprises water vapour or industrial harmful gas one wherein, when using the present embodiment as pyrolysis water hydrogen producer application or when applying as gasification furnace equipment, heat medium is water vapour, and work gas selects hydrogen; When using the present embodiment as pernicious gas disposal facility application time, heat medium is pernicious gas, and work gas selects air.
Claims (4)
1. a disc negative electrode, it is characterized in that the disk front center of disc negative electrode has bossy body, the bossy body of disk front center forms cathode taps, there is puff prot (2-2) at the center of cathode taps, puff prot (2-2) end face around forms discharge end (2-3), the disk posterior center of disc negative electrode has bell and spigot (2-5), and bell and spigot (2-5) communicates with puff prot (2-2), disc periphery along body rear end form sealing plane (2-6).
2. a kind of disc negative electrode according to claim 1, it is characterized in that at disc periphery along body there being screw (2-1), screw (2-1) is more than two, is evenly distributed.
3. a kind of disc negative electrode according to claim 1, is characterized in that the front end of cathode taps is arc surface structure.
4. a kind of disc negative electrode according to claim 1, is characterized in that there is sealing circular groove (2-4) bell and spigot (2-5) rear end of disk posterior center.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520233853.XU CN204498453U (en) | 2015-04-18 | 2015-04-18 | A kind of disc negative electrode |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520233853.XU CN204498453U (en) | 2015-04-18 | 2015-04-18 | A kind of disc negative electrode |
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| CN204498453U true CN204498453U (en) | 2015-07-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104780700A (en) * | 2015-04-18 | 2015-07-15 | 衢州迪升工业设计有限公司 | Plasma torch for disk cathode and pyrolysis use |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104780700A (en) * | 2015-04-18 | 2015-07-15 | 衢州迪升工业设计有限公司 | Plasma torch for disk cathode and pyrolysis use |
| CN104780700B (en) * | 2015-04-18 | 2017-09-26 | 衢州迪升工业设计有限公司 | A kind of disc negative electrode |
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Granted publication date: 20150722 Termination date: 20180418 |
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| CF01 | Termination of patent right due to non-payment of annual fee |