CN107529269B - Cathode inner core of plasma generator and plasma generator thereof - Google Patents
Cathode inner core of plasma generator and plasma generator thereof Download PDFInfo
- Publication number
- CN107529269B CN107529269B CN201710806967.2A CN201710806967A CN107529269B CN 107529269 B CN107529269 B CN 107529269B CN 201710806967 A CN201710806967 A CN 201710806967A CN 107529269 B CN107529269 B CN 107529269B
- Authority
- CN
- China
- Prior art keywords
- cathode
- anode
- inner core
- shell
- plasma generator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000000498 cooling water Substances 0.000 claims description 34
- 238000002679 ablation Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 230000008602 contraction Effects 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910052735 hafnium Inorganic materials 0.000 claims description 3
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 239000010937 tungsten Substances 0.000 claims description 3
- 229910052726 zirconium Inorganic materials 0.000 claims description 3
- 238000000034 method Methods 0.000 description 5
- 239000003245 coal Substances 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 235000011511 Diospyros Nutrition 0.000 description 1
- 244000236655 Diospyros kaki Species 0.000 description 1
- 229910001080 W alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/26—Plasma torches
- H05H1/32—Plasma torches using an arc
- H05H1/34—Details, e.g. electrodes, nozzles
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/26—Plasma torches
- H05H1/28—Cooling arrangements
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/26—Plasma torches
- H05H1/32—Plasma torches using an arc
- H05H1/34—Details, e.g. electrodes, nozzles
- H05H1/3405—Arrangements for stabilising or constricting the arc, e.g. by an additional gas flow
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/26—Plasma torches
- H05H1/32—Plasma torches using an arc
- H05H1/34—Details, e.g. electrodes, nozzles
- H05H1/3431—Coaxial cylindrical electrodes
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/26—Plasma torches
- H05H1/32—Plasma torches using an arc
- H05H1/34—Details, e.g. electrodes, nozzles
- H05H1/3436—Hollow cathodes with internal coolant flow
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Plasma Technology (AREA)
Abstract
The invention discloses a cathode inner core of a plasma generator and the plasma generator thereof, wherein the plasma generator comprises a cathode assembly, an anode bracket and a swirl ring, the cathode assembly comprises a cathode inner core and a shell, the cathode inner core comprises a deep cup-shaped cathode base and an emitter, the deep cup-shaped cathode base is of a deep cup-shaped structure with one end open and one end closed, and the length-diameter ratio of an inner hole of the deep cup-shaped cathode base is 5-15 times; and the emitter is inlaid at the bottom of an inner hole of the deep cup-shaped cathode base. The invention has simple structure, low gas consumption, high plasma temperature, reliable operation and stable service life of the anode and the cathode reaching more than 1000 hours.
Description
Technical Field
The invention relates to a plasma generator, in particular to a plasma generator suitable for plasma ignition of a pulverized coal boiler.
Background
Arc type plasma generators are currently classified into axial type plasma generators and coaxial type plasma generators in terms of structure and the position of an arc in the plasma generator. The axial plasma generator is divided into two types, one is called as axial plasma generator with central electrode, and is characterized by that its cathode is bar-shaped, its emitting surface is the end face of bar, and another is called as tubular cathode plasma generator, and its emitting surface is the internal ring surface of tube.
The running current of the plasma generator is reduced, so that the cost of the electrical system equipment matched with the plasma generator can be reduced, and the service life of the electrode of the plasma generator can be greatly prolonged.
Currently, plasma generator operating currents of 100KW and above are generally greater than 200A and individual plasma generator operating currents can be as low as 185A, for example: an arc path diameter anisotropic arc plasma torch (CN 103354695A) was rated for 270A and a non-transferred arc plasma torch anode and plasma torch (CN 101699928B) was rated for 200A. The two plasma generators are used in a large amount of engineering, the carrier wind consumption is high, the carrier wind normal consumption of a typical 100KW plasma generator is 80-100 standard square, the plasma temperature is only 2500 ℃, the problem that the high-quality coal is not easy to ignite in a thermal power plant is solved, the temperature of the plasma is low and the activity is poor when the low-quality coal, particularly dangerous waste and garbage, is basically lost, and the cutting speed is reduced due to the fact that the plasma arc temperature is too low in the cutting field. Therefore, a method with low gas consumption and high plasma arc temperature is needed to be found to adapt to the inferior coal, dangerous waste and garbage. In addition, the wind pressure of the carrier wind of the 2 plasma generators is basically kept unchanged when the arc is started and when the carrier wind runs, and the improvement of the length-diameter ratio of the inner hole of the cup-shaped cathode is limited, wherein a pit is formed on the end face of the cathode of the arc plasma torch (CN 103354695A) with different arc channel diameters after the cathode is ablated, and the pit is designed for a new cathode by the anode of the non-transferred arc plasma torch and the plasma torch (CN 101699928B), wherein the length-diameter ratio of the pit is originally 1:1 (diameter 50mm, depth 50 mm) after ablation no more than 2:1, the method for increasing the arc voltage is mainly to increase a transition anode, and no pit length-diameter ratio is more than 2: 1.
For the above-mentioned tubular cathode plasma generator, it can also be understood as cathode pits, the aspect ratio of which is generally large, and can reach 10:1, but the electron emission surface of the plasma cathode is a ring surface, the products of the company are more known in the early stage, the patents CN102686003B and CN103841742B both describe that the designed emission surface is the inner surface of a circular tube, and in practice, the unexpected working condition is found to be burned to the bottom of a pit by accident, but the accident is the accident state, so that the inventor is aware that the tubular cathode and the rod-shaped cathode with the pit are in the same source, and the principle is hidden.
With the improvement of the operation stability of the plasma generator, how to reduce the operation current, and further reduce the construction and operation cost of the plasma generator system become an unavoidable topic of the plasma generator system.
Disclosure of Invention
The invention aims to: in order to overcome the defects in the prior art, the invention provides the cathode inner core of the plasma generator and the plasma generator thereof, which have the advantages of simple structure, low gas consumption, high plasma temperature, high thermal efficiency, high voltage, low current and reliable operation.
The technical scheme is as follows: in order to achieve the above purpose, the invention adopts the following technical scheme:
The cathode inner core of the plasma generator comprises a deep cup-shaped cathode base and an emitter, wherein the deep cup-shaped cathode base is of a deep cup-shaped structure with one end open and one end closed, and the length-diameter ratio of an inner hole of the deep cup-shaped cathode base is 5-15 times; and the emitter is inlaid at the bottom of an inner hole of the deep cup-shaped cathode base.
Preferably: the emitters are 1 or more.
Preferably: the deep cup-shaped cathode base is made of one or more materials of copper, aluminum and silver; the emitter is made of one or more materials of tungsten, zirconium and hafnium.
Preferably: the deep cup cathode base inner bore is a straight bore or a tapered bore.
Preferably: the diameter of the inner hole of the deep cup-shaped cathode base is 15-40 mm.
A deep cup cathode plasma generator, comprising a cathode assembly, an anode assembly, a swirl ring and an anode support, wherein the cathode assembly comprises a cathode inner core and a cathode outer shell; the closed end of the cathode inner core is arranged in the cathode shell, and the open end of the cathode inner core penetrates through the cathode shell and extends out of the cathode shell; the anode assembly comprises an anode inner core, a coil sleeve and an anode shell, wherein the coil, the coil sleeve and the anode shell are sleeved in sequence from inside to outside; the swirl ring and the anode bracket are sequentially arranged between the cathode shell and the coil sleeve from inside to outside, and the coil is positioned between the anode bracket and the coil sleeve; the air inlet end of the anode inner core is arranged in the anode bracket, and the air outlet end sequentially passes through the anode bracket, the coil sleeve and the anode shell to extend out of the anode shell; the cathode inner core is arranged in the anode bracket, the opening end of the cathode inner core is opposite to the air inlet end of the anode inner core, and a gap is formed between the opening end of the cathode inner core and the air inlet end of the anode inner core; a carrier wind channel is arranged between the cyclone ring and the anode bracket, and the gap is communicated with the carrier wind channel through an air inlet hole on the cyclone ring; the cathode shell is provided with a first cooling water channel which is communicated with the internal space of the cathode shell; the cooling water channel I is arranged on the anode support, the cooling water channel II is formed by encircling the anode support, the anode inner core, the coil and the coil sleeve, the cooling water channel II is communicated with the cooling water channel III, the cooling water channel IV is arranged between the coil sleeve and the anode shell, the cooling water channel IV is communicated with the cooling water channel V and is communicated with the cooling water channel IV through a cooling water through hole on the coil sleeve.
Preferably: the outer shape of the cathode shell is a hammer shape with a big head and a thin neck, and the diameter of the head is 1.1-5 times of the diameter of the neck; the anode inner core is of a Laval nozzle structure which is contracted firstly and expanded later, the contraction angle is between 2 and 15 degrees, the expansion angle is between 45 and 120 degrees, the part after expansion is a straight section, and the length-diameter ratio of the throat opening is 1:1 to 1:4.
Preferably: the air inlet mode of the cyclone ring is axial air inlet, tangential air inlet or volute air inlet.
Preferably: the extension distance of the anode inner core extending out of the anode shell is 5-20 mm; the gap between the cathode and the anode is 0.5-5 mm.
Preferably: the average pore diameter of the inner hole is larger than the diameter of the throat opening of the anode inner core.
Compared with the prior art, the invention has the following beneficial effects:
1. The deep cup-shaped cathode ablation point is arranged at the cup bottom, the cup depth is increased along with the ablation of the cup bottom, and theoretically, the thicker the cup bottom is, the longer the service life of the cathode is, and in practice, the service life of the cathode can easily exceed 1000 hours.
2. In the process of flying the anode after electrons are emitted from an emitter at the bottom center of a deep cup-shaped cathode inner core cup, most of the time flies in the cathode, which is equivalent to a transition anode in the prior art, but the electrons in the cathode are repulsive force of the same charges on the wall surface of the cathode, and attractive force of different charges in the transition anode in the prior art, so that the electrons are not easy to diffuse to a constraint cold wall, and therefore, the invention has the advantages of low carrier wind consumption, high arc temperature, small lost heat and high electrothermal conversion efficiency.
3. At high voltage (500-1000V), the lowest steady operation current is as low as (70A), indicating good arc stability, while the existing arc minimum steady operation current above 500V is greater than 140A.
4. The rated carrier air quantity of the 100 KW-level existing technology adopting a transition anode is more than 90 standard square, and the technology is as low as 30 standard square; the arc temperature of the invention can reach 6000 ℃.
5. The small-sized coil is arranged in the anode, a magnetic field is formed in the process that current enters the anode inner core through the coil, the magnetic field and rotating carrier wind cooperatively blow the anode arc root to rotate rapidly on the surface of the anode inner core, the ablation is uniform and slow, and the service life of the anode can reach more than 2000 hours.
6. When the high-frequency arc striking is adopted, the total mass of the plasma generator with the installation distance of 1000mm is only 30kg, and the overhaul and maintenance are convenient.
7. The invention uses 2 kinds of axial plasma generators: the boundaries of the rod-shaped cathode plasma and the tubular cathode plasma are completely broken, a boundary-fuzzy plasma generator form is generated, the advantages of 2 plasma generators are inherited, and the self-originality characteristics are provided: the arc stability is fundamentally improved, and the fluctuation amplitude of the arc voltage is within plus or minus 2V under the normal condition when the arc voltage is 600V.
Drawings
Fig. 1: a cathode inner core of a plasma generator and a structural schematic diagram of the plasma generator.
Fig. 2: cathode core structure diagram.
Fig. 3: the swirl ring is structured.
The device comprises a 1-cathode inner core, a 2-cathode outer shell, a 3-swirl ring, a 4-anode bracket, a 5-anode inner core, a 6-coil, a 7-coil sleeve, an 8-anode outer shell, a 101-cathode base and a 102-emitter.
Detailed Description
The present application is further illustrated in the accompanying drawings and detailed description which are to be understood as being merely illustrative of the application and not limiting of its scope, and various equivalent modifications to the application will fall within the scope of the application as defined in the appended claims after reading the application.
A deep cup cathode plasma generator, as shown in fig. 1, comprises a cathode assembly, an anode bracket 4 and a swirl ring 3, wherein the cathode assembly comprises a cathode inner core 1 and a cathode outer shell 2; the closed end of the cathode inner core 1 is arranged in the cathode shell 2, and the open end of the cathode inner core 1 penetrates through the cathode shell 2 and extends out of the cathode shell 2, namely, the cathode inner core 1 is arranged in the cathode shell 2 to form a cathode assembly. The anode assembly comprises an anode inner core 4, a coil 6, a coil sleeve 7 and an anode shell 8, wherein the coil 6, the coil sleeve 7 and the anode shell 8 are sequentially sleeved from inside to outside, as shown in fig. 1, the coil 6 is sleeved outside the anode inner core 5, the coil sleeve 7 is sleeved outside the coil 6, the anode shell 8 is sleeved outside the coil sleeve 7, and the anode inner core 4, the coil 6, the coil sleeve 7 and the anode shell 8 form the anode assembly together. The swirl ring 3 and the anode bracket 4 are sequentially arranged between the cathode shell 2 and the coil sleeve 7 from inside to outside, and the coil 6 is positioned between the anode bracket 4 and the coil sleeve 7; the air inlet end of the anode inner core 4 is arranged in the anode support 4, the air outlet end sequentially passes through the anode support 4, the coil 6, the coil sleeve 7 and the anode shell 8 to extend out of the anode shell 8, as shown in fig. 1, a swirl ring 3 is sleeved outside a cathode assembly, the anode support 4 is sleeved outside the swirl ring 3, and the anode assembly is sleeved outside the anode support 4 and is usually connected through threads. The cathode inner core 1 is arranged in the anode bracket 4, the opening end of the cathode inner core 1 is opposite to the air inlet end of the anode inner core 4, and a gap is formed between the opening end of the cathode inner core 1 and the air inlet end of the anode inner core 4; a carrier wind channel is arranged between the swirl ring 3 and the anode support 4, the gap is communicated with the carrier wind channel through an air inlet hole on the swirl ring 3, and carrier wind enters the arc channels of the cathode inner core 1 and the anode inner core 4 after entering the gap between the cathode inner core 1 and the anode inner core 4 from a tangential hole in the swirl ring 3. The cathode shell 2 is provided with a first cooling water channel which is communicated with the internal space of the cathode shell 2; the cooling water channel I is formed by enclosing between the anode support 4, the anode inner core 4, the coil 6 and the coil sleeve 7, the cooling water channel I is communicated with the cooling water channel I, the cooling water channel II is arranged between the coil sleeve 7 and the anode shell 8, the cooling water channel II is arranged between the anode support 4 and the anode shell 8, the cooling water channel IV is communicated with the cooling water channel I, and the cooling water channel III is communicated with the cooling water through holes on the cooling water channel four-way coil sleeve 7.
The cathode inner core 1 comprises a deep cup-shaped cathode base 101 and an emitter 102, wherein the deep cup-shaped cathode base 101 is of a deep cup-shaped structure with one end open and one end closed, and the length-diameter ratio of an inner hole of the deep cup-shaped cathode base 101 is 5-15 times; and the emitter 102 is inlaid at the bottom of the inner hole of the deep cup-shaped cathode base 101. As shown in FIG. 2, the bottom center of the deep cup-shaped cathode base 101 is embedded with 1 or more emitters, the cathode base 101 is made of copper, aluminum, silver or other metals, and the emitters 102 are made of tungsten, zirconium, hafnium, persimmon tungsten alloy or the like.
The inner bore of the deep cup-shaped cathode base 101 is a straight or tapered bore with an average pore diameter greater than the throat diameter of the anode core 5.
The diameter of the inner hole of the deep cup-shaped cathode base 101 is 15-40 mm, and the length-diameter ratio of the inner hole of the deep cup-shaped cathode base 101 is 5-15 times.
The outer shape of the cathode shell 2 is a hammer shape with a big head and a thin neck, and the diameter of the head is 1.1-5 times of the diameter of the neck.
As shown in fig. 3, the swirl ring 3 is fed tangentially, and is used to obtain a swirl flow, so that it is possible to feed either axially, tangentially or in a volute. The swirl ring is used for electrically insulating and air-isolating the cathode and the anode, and is made of insulating materials such as ceramic, plastic, rubber and the like.
The anode inner core 5 has a Laval nozzle structure which is contracted firstly and then expanded, the contraction angle is between 2 and 15 degrees, the expansion angle is between 45 and 120 degrees, the part after expansion is a straight section, and the length-diameter ratio of the throat opening is 1:1 to 1: 4.
The outside of the anode core 5 is sleeved with a coil 6, anode current passes through the coil 6 to reach the anode core 5, the coil 6 and the coil sleeve 7 simultaneously play a role in guiding cooling water, the anode core 5 and the coil 6 are generally connected through threads or in other forms, and the anode core 5 and the anode shell 8 are generally sealed through O-shaped rings and are electrically insulated, or are sealed and electrically insulated by adopting other insulating materials.
The anode core 5 protrudes from the anode casing 8, preferably by a distance of 5-20 mm.
The gap between the end faces of the cathode core 1 and the anode core 5 is 0.5 to 5mm, preferably 2mm.
The carrier wind pressure during the arcing is low, the carrier wind pressure during normal operation is high, the carrier wind pressure during normal operation is 1.1-50 times of the carrier wind pressure (gauge pressure) during the arcing, the carrier wind pressure during the arcing is high, the arcing is difficult, the aspect ratio of the cathode inner core 1 is small or the cathode arc root cannot reach the cup bottom of the cathode inner core 1 due to the low carrier wind pressure during the normal operation.
The working process comprises the following steps: the direct current power supply is respectively connected to the cathode and the anode, high-frequency arc striking or contact arc striking is adopted during arc striking, carrier wind pressure is usually smaller (such as 10 KPa) during arc striking, an arc is firstly generated at the gap between the cathode inner core 1 and the anode inner core 5, the cathode arc root of the arc is blown into the cup of the cathode inner core 1 due to the blowing of carrier wind with tangential rotational flow, at the moment, the cathode arc root generally rotates at the cup wall, the carrier wind pressure is gradually increased (such as 100 KPa), the cathode arc root gradually moves to the deep of the cup-shaped cathode, finally reaches the bottom of the cup-shaped cathode, the anode arc root of the arc is blown out of the throat opening of the Laval nozzle of the anode inner core 5, the voltage of the arc is changed along with the carrier wind pressure, the carrier wind pressure is adjusted to enable the arc voltage to reach a target voltage, and the arc enters a steady state.
The emitter 102 of the cathode adopts a material different from that of the deep cup-shaped cathode base 101, the swirl ring 3 adopts tangential air inlet, the anode inner core 5 is of a Laval nozzle structure, the cathode inner core and the anode inner core are coaxially arranged, the swirl ring is used as an insulator to electrically insulate the cathode inner core and the anode inner core and charge plasma carrier wind, the invention has the advantages of simple structure, low air consumption, high plasma temperature, reliable operation and stable service life of the anode and the cathode reaching more than 1000 hours.
The foregoing is only a preferred embodiment of the invention, it being noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the invention.
Claims (9)
1. A cathode core for a plasma generator, characterized by: the cathode comprises a deep cup-shaped cathode base (101) and an emitter (102), wherein the deep cup-shaped cathode base (101) is of a deep cup-shaped structure with one end open and one end closed, and the length-diameter ratio of an inner hole of the deep cup-shaped cathode base (101) is 5-15 times; the emitter (102) is inlaid at the bottom of an inner hole of the deep cup-shaped cathode base (101); the deep cup-shaped cathode ablation point is arranged at the bottom of the cup; the diameter of the inner hole of the deep cup-shaped cathode base (101) of the cathode inner core is 15-40 mm.
2. The cathode core of a plasma generator of claim 1, wherein: the emitters (102) are 1 or more.
3. The cathode core of a plasma generator of claim 1, wherein: the deep cup-shaped cathode base (101) is made of one or more materials of copper, aluminum and silver; the emitter (102) is made of one or more materials of tungsten, zirconium and hafnium.
4. The cathode core of a plasma generator of claim 1, wherein: the inner hole of the deep cup-shaped cathode base (101) is a straight hole or a conical hole.
5. A deep cup cathode plasma generator characterized by: comprising a cathode assembly, an anode assembly, a swirl ring (3) and an anode support (4), said cathode assembly comprising a cathode inner core (1), a cathode outer shell (2) of the plasma generator of any of claims 1 to 4; the closed end of the cathode inner core (1) is arranged in the cathode shell (2), and the open end of the cathode inner core (1) penetrates through the cathode shell (2) and stretches out of the cathode shell (2); the anode assembly comprises an anode inner core (5), a coil (6), a coil sleeve (7) and an anode shell (8), wherein the coil (6), the coil sleeve (7) and the anode shell (8) are sleeved in sequence from inside to outside; the swirl ring (3) and the anode bracket (4) are sequentially arranged between the cathode shell (2) and the coil sleeve (7) from inside to outside, and the coil (6) is positioned between the anode bracket (4) and the coil sleeve (7); the air inlet end of the anode inner core (5) is arranged in the anode bracket (4), and the air outlet end sequentially passes through the anode bracket (4), the coil (6) and the coil sleeve (7) to extend out of the anode shell (8); the cathode inner core (1) is arranged in the anode bracket (4), the opening end of the cathode inner core (1) is opposite to the air inlet end of the anode inner core (5), and a gap is formed between the opening end of the cathode inner core (1) and the air inlet end of the anode inner core (5); a carrier wind channel is arranged between the cyclone ring (3) and the anode bracket (4), and the gap is communicated with the carrier wind channel through an air inlet hole on the cyclone ring (3); the cathode shell (2) is provided with a first cooling water channel which is communicated with the internal space of the cathode shell (2); be provided with cooling water passageway two on positive pole support (4), enclose into cooling water passageway three between positive pole support (4), positive pole inner core (5), coil (6), coil cover (7), cooling water passageway two communicates with cooling water passageway three, be provided with cooling water passageway four between coil cover (7) and positive pole shell (8), be provided with cooling water passageway five between positive pole support (4) and positive pole shell (8), cooling water passageway four communicates with cooling water passageway five, cooling water passageway three communicates with the cooling water through-hole on cooling water passageway four-way coil cover (7).
6. The deep cup-shaped cathode plasma generator of claim 5 wherein: the appearance of the cathode shell (2) is in a hammer shape with a big head and a thin neck, and the diameter of the head is 1.1-5 times of that of the neck.
7. The deep cup-shaped cathode plasma generator of claim 6 wherein: the air inlet mode of the swirl ring (3) is axial air inlet, tangential air inlet or spiral casing type air inlet.
8. The deep cup-shaped cathode plasma generator of claim 6 wherein: the extending distance of the anode inner core (5) extending out of the anode shell (8) is 5-20 mm.
9. The deep cup-shaped cathode plasma generator of claim 6 wherein: the structure of the anode inner core (5) is a Laval nozzle structure which is contracted firstly and expanded later, the contraction angle is between 2 and 15 degrees, the expansion angle is between 45 and 120 degrees, the part after expansion is a straight section, and the length-diameter ratio of the throat is 1: 1-1: 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710806967.2A CN107529269B (en) | 2017-09-08 | 2017-09-08 | Cathode inner core of plasma generator and plasma generator thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710806967.2A CN107529269B (en) | 2017-09-08 | 2017-09-08 | Cathode inner core of plasma generator and plasma generator thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107529269A CN107529269A (en) | 2017-12-29 |
| CN107529269B true CN107529269B (en) | 2024-06-18 |
Family
ID=60736525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710806967.2A Active CN107529269B (en) | 2017-09-08 | 2017-09-08 | Cathode inner core of plasma generator and plasma generator thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107529269B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108633159A (en) * | 2018-05-02 | 2018-10-09 | 北京戎聚环境科技有限公司 | Plasma generator |
| CN109803479B (en) * | 2019-01-30 | 2025-02-11 | 武汉天和技术股份有限公司 | A plasma torch point cathode structure and preparation method thereof |
| CN110381660B (en) * | 2019-07-02 | 2024-05-14 | 苏州微木智能系统有限公司 | Plasma generator |
| CN112351570A (en) * | 2020-10-19 | 2021-02-09 | 江苏天楹等离子体科技有限公司 | Novel direct current plasma generator |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1053380A (en) * | 1990-01-17 | 1991-07-31 | Esab焊机产品公司 | The electrode that is used for plasma (welding) torch |
| CN102123558A (en) * | 2010-12-22 | 2011-07-13 | 武汉天和技术股份有限公司 | Internally-hollow cathode double-compression plasma generating device with long service life |
| CN103841742A (en) * | 2014-03-26 | 2014-06-04 | 徐州燃控科技股份有限公司 | Magnetic rotating arc plasma generator |
| CN207251995U (en) * | 2017-09-08 | 2018-04-17 | 徐州科融环境资源股份有限公司 | The cathode inner core and its plasma generator of a kind of plasma generator |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2310077Y (en) * | 1997-10-17 | 1999-03-10 | 中国科学院空间科学与应用研究中心 | Gridless ion source for large area auxiliary film plating |
| CN101699928B (en) * | 2009-10-27 | 2012-08-22 | 中国科学技术大学 | Anode for non-transferred arc plasma torch and plasma torch |
| US8633417B2 (en) * | 2010-12-01 | 2014-01-21 | The Esab Group, Inc. | Electrode for plasma torch with novel assembly method and enhanced heat transfer |
| CN102127755B (en) * | 2011-02-17 | 2014-04-30 | 中国科学技术大学 | Direct current glow plasma device and preparation method of diamond chip |
| CN103404237B (en) * | 2011-02-28 | 2016-05-25 | 维克托设备公司 | There is the plastic cutting burner of advanced cooling duct |
| CN103354695B (en) * | 2013-07-25 | 2016-02-24 | 安徽省新能电气科技有限公司 | A kind of arc plasma torch of arc channel diameter abnormity |
| CN104684234B (en) * | 2014-12-24 | 2017-02-22 | 徐州科融环境资源股份有限公司 | High-power air-cooled plasma generator |
| CN105142323B (en) * | 2015-09-07 | 2017-10-13 | 徐州科融环境资源股份有限公司 | A kind of air cooling plasma electrode |
-
2017
- 2017-09-08 CN CN201710806967.2A patent/CN107529269B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1053380A (en) * | 1990-01-17 | 1991-07-31 | Esab焊机产品公司 | The electrode that is used for plasma (welding) torch |
| CN102123558A (en) * | 2010-12-22 | 2011-07-13 | 武汉天和技术股份有限公司 | Internally-hollow cathode double-compression plasma generating device with long service life |
| CN103841742A (en) * | 2014-03-26 | 2014-06-04 | 徐州燃控科技股份有限公司 | Magnetic rotating arc plasma generator |
| CN207251995U (en) * | 2017-09-08 | 2018-04-17 | 徐州科融环境资源股份有限公司 | The cathode inner core and its plasma generator of a kind of plasma generator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107529269A (en) | 2017-12-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107529269B (en) | Cathode inner core of plasma generator and plasma generator thereof | |
| CN104454290B (en) | Elongating arc plasma jet ignition device | |
| CN101699928B (en) | Anode for non-transferred arc plasma torch and plasma torch | |
| CN103277231A (en) | Aero-engine air rotational flow plasma igniter | |
| CN101463763B (en) | Magnetically stabilized plasma flow ignition generator | |
| CN100585279C (en) | A pulverized coal ignition device and ignition method | |
| CN107592722A (en) | A kind of magnetic rotation arc plasma generator | |
| CN203378130U (en) | Anode of supersonic speed plasma spray gun and supersonic speed plasma spray gun | |
| CN201170548Y (en) | A New Plasma Arc Ignition System | |
| CN203645904U (en) | Rotary torch head device of plasma torch | |
| CN207251996U (en) | A kind of magnetic rotation arc plasma generator | |
| CN112983283B (en) | Plasma torch rock breaking composite drill bit and plasma torch rock breaking composite drill | |
| CN101790276A (en) | Plasma generating device and method thereof | |
| CN104684234B (en) | High-power air-cooled plasma generator | |
| CN103486579A (en) | Plasma ignition and combustion stabilization device for IGBT (insulated gate bipolar transistor) rectification power supply | |
| CN102438387A (en) | Cyclone type low-temperature plasma generator | |
| CN1589088A (en) | Double anode heat plasma generator | |
| CN112911780B (en) | Cascaded plasma generator | |
| JPS6340299A (en) | Electrode construction of non-transferring plasma torch | |
| CN105142323B (en) | A kind of air cooling plasma electrode | |
| CN207251995U (en) | The cathode inner core and its plasma generator of a kind of plasma generator | |
| CN110524096B (en) | Plasma welding gun for connecting vacuum welding box | |
| CN108430148A (en) | a plasma generator | |
| CN110107406B (en) | Anode self-cooling type plasma igniter | |
| CN204362408U (en) | A kind of high-power air cooling plasma generator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20240513 Address after: No. 12 Yangshan Road, Economic Development Zone, Xuzhou City, Jiangsu Province, 221000 Applicant after: XUZHOU COMBUSTION CONTROL RESEARCH INSTITUTE Co.,Ltd. Country or region after: China Address before: 221004 No. 12 Yang Shan Road, Xuzhou Economic Development Zone, Jiangsu, China Applicant before: XUZHOU KERONG ENVIRONMENTAL RESOURCES Co.,Ltd. Country or region before: China |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |