CN116634621A - High-temperature melting furnace electrode - Google Patents

High-temperature melting furnace electrode Download PDF

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Publication number
CN116634621A
CN116634621A CN202310906705.9A CN202310906705A CN116634621A CN 116634621 A CN116634621 A CN 116634621A CN 202310906705 A CN202310906705 A CN 202310906705A CN 116634621 A CN116634621 A CN 116634621A
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CN
China
Prior art keywords
metal foil
diversion trench
electrode cap
cooling
temperature furnace
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CN202310906705.9A
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Chinese (zh)
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请求不公布姓名
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Hongwu Technology Materials Suzhou Co ltd
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Hongwu Technology Materials Suzhou Co ltd
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Priority to CN202310906705.9A priority Critical patent/CN116634621A/en
Publication of CN116634621A publication Critical patent/CN116634621A/en
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    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B7/00Heating by electric discharge
    • H05B7/02Details
    • H05B7/12Arrangements for cooling, sealing or protecting electrodes
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Furnace Details (AREA)

Abstract

The application relates to a high-temperature furnace electrode, which comprises an electrode cap connected with a power supply device, wherein a support core is arranged in the electrode cap, and a cooling channel is arranged on the support core; the outer wall of the supporting core is provided with a concave and communicated diversion trench, and is covered with a metal foil, the metal foil comprises a connecting part and a deformation part, and the diversion trench and the deformation part of the metal foil are structured into the cooling channel; the deformation part is deformed in the conduction state of the cooling channel and is in abutting contact with the inner wall of the electrode cap. Through the design of covering the metal foil by the spiral diversion trench, when cooling liquid is introduced, the metal foil bulges to be attached to the electrode cap, and compared with the design of the traditional coil pipe type cooling pipe, the contact area is larger, and the cooling effect is greatly improved; in addition, the bulge of the metal foil also plays a supporting role on the electrode cap, so that the design wall thickness of the electrode cap can be reduced, the material cost is saved, and the cooling effect is improved.

Description

High-temperature melting furnace electrode
Technical Field
The application relates to the technical field of glass manufacturing, in particular to a high-temperature melting furnace electrode.
Background
Electrodes are key devices in a glass electric melting furnace, and a glass solution in the glass melting furnace is heated by energizing the electrodes. The conventional common electrodes comprise tin oxide electrodes, molybdenum electrodes, graphite electrodes, znSe and the like, but have some defects in use, such as the molybdenum electrode graphite electrodes are easy to dye glass at high temperature, and the color of the glass is changed; the ZnSe electrode can separate out harmful substances; the tin oxide electrode is made of ceramic material, has high cost and difficult operation, and is not suitable for the production and manufacture of optical glass, medical glass and the like with high requirements on a large scale.
At present, platinum group metal electrodes are mostly adopted in the manufacture of special glass, but the electrodes are used in a high-temperature environment for a long time, and cooling is needed to ensure the service life and the quality. Especially, the clarification temperature of high-end glass such as microcrystalline glass exceeds 1630 ℃, approaches the melting point of platinum group metals, and can cause corrosion of the platinum group metals under high-temperature and reductive environments. The cooling can reduce the temperature of platinum group metals, reduce corrosion and prolong service life. In addition, the higher the temperature, the higher the resistivity of the platinum group metal electrode (the relation between the resistivity of a part of platinum group metal and the temperature in fig. 7), the higher the voltage and power distributed on the electrode in the circuit, the lower the distributed energy on the corresponding glass solution, and the heating efficiency of the glass solution is reduced, so that the surface temperature of platinum is reduced, the distributed energy of platinum can be reduced, and the heating efficiency of the glass solution is improved.
The existing electrode is cooled by adopting a water cooling jacket, such as a borosilicate glass melting furnace electrode water jacket (patent number CN 201620716946.2), a high-temperature melting furnace water cooling electrode (patent number CN 201420130858.5), a glass melting furnace electrode (patent number CN 89109768.6) and the like, and the disclosed water cooling device is arranged outside the melting furnace or a part of the water cooling device stretches into the melting furnace, so that the cooling effect on the electrode is limited. In order to ensure the strength of the electrode, a supporting core is arranged in the hollow electrode in the existing market, a cooling water channel is arranged in the supporting core, and the cooling effect is limited; or the wall thickness is set to be larger, so that the cooling effect is poor and the use cost is increased. Therefore, the application designs the electrode of the high-temperature melting furnace to solve the problems in the prior art.
Disclosure of Invention
The application aims at: provides a high-temperature melting furnace electrode to solve the problems of poor cooling effect or high use cost of the glass melting furnace electrode in the prior art.
The technical scheme of the application is as follows: the high-temperature furnace electrode comprises an electrode cap connected with a power supply device, wherein a support core is arranged in the electrode cap, and a cooling channel is arranged on the support core;
the outer wall of the supporting core is provided with a concave and communicated diversion trench, and is covered with a metal foil, the metal foil comprises a connecting part and a deformation part, and the diversion trench and the deformation part of the metal foil are structured into the cooling channel;
the deformation part forms a reserved gap with the inner wall of the electrode cap in the non-conduction state of the cooling channel, and deforms to be in abutting contact with the inner wall of the electrode cap in the conduction state of the cooling channel.
Preferably, the connecting part is connected with the outer walls of the supporting cores at the two sides of the diversion trench; the deformation part is covered at the diversion trench; the contact area of the metal foil and the inner wall of the electrode cap is increased along with the increase of the flow rate of the cooling liquid introduced into the cooling channel, and the diversion trench is spiral.
Preferably, a first liquid inlet is formed in the support core; the second liquid inlet is formed in the upper end of the diversion trench towards the inside of the supporting core, and the first liquid inlet is connected with the second liquid inlet.
Preferably, a first liquid outlet hole is formed in the support core, a second liquid outlet hole is formed in the lower end of the diversion trench towards the inside of the support core, and the first liquid outlet hole is connected with the second liquid outlet hole.
Preferably, the outer wall of the supporting core is provided with a yielding groove, and the yielding groove and the flow guiding groove have the same path direction; the metal foil is coated on the supporting core and is connected to the bulge formed between the diversion trench and the abdication trench through forge welding.
Preferably, the edge of the diversion trench is provided with a step, and the metal foil is connected to the step.
Preferably, the supporting core is made of copper-based alloy and nickel-based alloy.
Preferably, the metal foil is copper foil or carbon nano film.
Preferably, the diversion trench is provided with a plurality of positions, and the corresponding first liquid inlet hole, second liquid inlet hole, first liquid outlet hole and second liquid outlet hole are also respectively provided with a plurality of positions.
Preferably, the electrode cap is made of platinum.
Compared with the prior art, the application has the advantages that:
(1) Through the design that the diversion trench covers the metal foil, when cooling liquid is introduced, the metal foil bulges to be attached to the electrode cap, and compared with the design of the traditional coil type cooling pipe, the design that the diversion trench is spiral has larger contact area and greatly increases the cooling effect; the traditional platinum can only be used in glass solution at 1450-1500 ℃, and the use temperature in the platinum smelting furnace can reach 1600-1680 ℃;
(2) The metal foil bulges to support the electrode cap, so that the strength of the electrode is improved; therefore, the design wall thickness of the electrode cap can be reduced, and the material cost is saved;
(3) The metal foil bulges to be attached to the electrode cap for cooling, so that the outer diameter of the support core can have larger tolerance margin in actual design, the difficulty in processing and mounting the support core is reduced, and the manufacturing cost is further reduced; if the copper foil bulges 0.2-0.4 mm, and the supporting core and electrode cap clearance is calculated according to the standard of 0.1mm, the supporting core radius tolerance can reach-0.3-0.1 mm;
(4) The support core can be reused, the support core and the electrode cap can be designed with enough space, when a certain use time is reached, the metal foil is ablated, the support core can be disassembled without damage, and the metal foil can be welded again for reuse; the traditional support core and the electrode cap are attached, and cannot be reused after being used at high temperature for a long time, and even the ceramic material inner core is inevitably damaged during disassembly, so that the design greatly reduces the cost;
(5) Through the design of a plurality of diversion trenches, a plurality of cooling channels are used for cooling together, the cooling effects are mutually overlapped, the cooling efficiency is greatly improved, and the supporting strength of the electrode cap is further improved;
(6) The cooling device has wide application range, can control the cooling efficiency by controlling the flow rate of the cooling liquid, and can control the contact area of the metal foil and the electrode cap by controlling the flow rate, wherein the contact area can be increased or decreased along with the increase or decrease of the flow rate in a certain range, so that the cooling capacity of the electrode cap is controlled, and the cooling device not only can be suitable for high temperature reaching 1680 ℃, but also is suitable for lower furnace temperature.
Drawings
The application is further described below with reference to the accompanying drawings and examples:
FIG. 1 is a schematic diagram of the electrode front view structure of the high temperature melting furnace according to the present application;
FIG. 2 is a schematic view of a support core structure according to the present application;
FIG. 3 is a schematic cross-sectional view of the electrode of the high-temperature melting furnace in example 1, and is not fed with a cooling liquid;
FIG. 4 is an enlarged schematic view of the structure of FIG. 3A;
FIG. 5 is a schematic sectional view showing the structure of an electrode of a high-temperature melting furnace according to example 1 in front view, and is a state in which a cooling liquid is introduced;
FIG. 6 is an enlarged schematic view of the structure of FIG. 5B;
FIG. 7 is a schematic view showing the structure of the electrode of the high-temperature melting furnace in example 2 in front cross section, and in a state of not passing a coolant;
FIG. 8 is an enlarged schematic view of FIG. 7 at C;
FIG. 9 is a schematic diagram showing a sectional structure of an electrode of a high-temperature melting furnace according to example 2 in front view, and showing a state in which a cooling liquid is introduced;
FIG. 10 is an enlarged schematic view of the structure of FIG. 9 at D;
FIG. 11 is a schematic sectional view showing the structure of the electrode of the high-temperature melting furnace in example 3 in front view, and in a state of not being fed with a cooling liquid;
FIG. 12 is an enlarged schematic view of the structure of FIG. 11 at E;
FIG. 13 is a schematic view showing a sectional structure of an electrode of a high-temperature melting furnace according to example 3 in front view, and showing a state in which a cooling liquid is introduced;
FIG. 14 is an enlarged schematic view of the structure of FIG. 13 at F;
fig. 15 is a graphical representation of resistivity versus temperature for a portion of the platinum group metal.
Wherein: electrode cap 1, support core 2, first inlet opening 21, second inlet opening 22, first outlet opening 23, second outlet opening 24, relief groove 25, protrusion 251, cooling channel 3, guide groove 31, step 311, metal foil 32, connecting portion 32a, deformation portion 32b.
Detailed Description
The following describes the present application in further detail with reference to specific examples:
examples
As shown in fig. 1 to 6, a high temperature furnace electrode comprises an electrode cap 1 connected with a power supply device (not shown), wherein a support core 2 is arranged in the electrode cap 1, and a cooling channel 3 is arranged on the support core 2; the outer wall of the supporting core 2 is formed with a concave and communicated diversion trench 31 and covered with a metal foil 32. The metal foil 32 comprises a connecting part 32a and a deformation part 32b, wherein the connecting part 32a is connected with the outer walls of the supporting cores 2 at the two sides of the diversion trench 31; the deformed portion 32b covers the guide groove 31 and forms the cooling passage 3. The deformation portion 32b forms a clearance between the cooling passage 3 and the inner wall of the electrode cap 1 in a non-conductive state, and deforms to contact the inner wall of the electrode cap 1 in a conductive state of the cooling passage 3.
A first liquid inlet 21 is arranged in the support core 2 along the axial core direction; the upper end of the diversion trench 31 is provided with a second liquid inlet hole 22 towards the inside of the supporting core 2, and the first liquid inlet hole 21 is connected with the second liquid inlet hole 22. A first liquid outlet hole 23 is formed in the support core 2 along the axial core direction, a second liquid outlet hole 24 is formed in the lower end of the diversion trench 31 towards the inside of the support core 2, and the first liquid outlet hole 23 is connected with the second liquid outlet hole 24.
In the present embodiment, the shape of the electrode is not limited to the circular cross section shown in the drawings, but may be elliptical or other shapes. The diversion trench 31 is spirally arranged on the outer wall of the supporting core, and of course, the diversion trench can also be arranged along the length direction of the supporting core or arranged in other structures; the flow guide groove 31 is not limited to the arc-shaped groove shown in the drawings, but may be square or other shapes. The first liquid inlet 21 and the first liquid outlet 23 are formed along the direction of the support core 2, but do not necessarily coincide with the support core 2. Compared with the cooling liquid entering from the lower end of the diversion trench 31, the cooling liquid entering from the upper end cools the electrode cap 1 from top to bottom, so that heat accumulation in the flowing of the cooling liquid can be reduced, and the cooling efficiency is improved.
The electrode cap 1 is made of platinum, platinum group metals and alloys thereof, including Pt, rh, ir, ptRh, ptIr, irRe, and the platinum group metal electrode avoids dyeing glass, and is suitable for manufacturing high-end glass products such as optical glass. The electrode cap 1 is hollow, the wall thickness is generally 0.8-1mm, the upper end is arc-shaped, the lower end is tubular, and the electrode cap 1 is integrally formed.
The supporting core 2 is made of copper-based alloy, nickel-based alloy and other metals with low resistivity and high heat conductivity coefficient and alloys thereof, and is convenient to process and suitable in price. In the embodiment, according to the upper end of the electrode cap 1 is arc-shaped and the lower end is cylindrical; the supporting core 2 is solid, the upper end is arc-shaped, and the lower end is cylindrical. The diversion trenches 31 are formed on the cylindrical outer wall of the lower end, and because the electrodes are arranged in pairs in actual work, most of current is concentrated at the top end of the electrode cap 1, and the resistance near the top end is small under the condition of unchanged voltage, the requirement can be met, therefore, the upper end of the electrode cap 1 does not need to be cooled, and the cooling of the lower end plays a role in cooling the top end of the electrode cap; in addition, the groove processing difficulty at the arc is high, and extra cost investment is not needed on the premise of not influencing the working effect. The guiding gutter 31 can be provided with a plurality of, and cooling channel 3 has a plurality ofly, does not communicate each other between a plurality of guiding gutters 31, lets in the coolant respectively in order to realize the more efficient cooling to electrode cap 1.
The metal foil 32 is a copper foil, a carbon nano film, or the like, and has good ductility, thermal conductivity, or the like. The metal foil 32 is attached to the support core 2 by forge welding and completely covers the channels 31, forming together with the channels 31 the cooling liquid channels 3. In this embodiment, the metal foil 32 is a whole sheet, the supporting core 2 is wrapped first, the connecting portion 32a of the metal foil 32 is attached to the surface of the supporting core 2 through forge welding, and the deformation portion 32b is located at the position of the diversion trench 31; in the forging process during forge welding, the deformed portion 32b of the metal foil 32 extends into the diversion trench 31 (as shown in fig. 3-4, the metal foil 32 is concave towards the diversion trench 31), so that the relaxation capacity of the metal foil 32 during cooling liquid passing is further increased, and meanwhile, the whole metal foil 32 can also effectively avoid the cooling liquid from flowing out.
Examples
As shown in fig. 7 to 10, based on the structure in embodiment 1, spiral relief grooves 25 are provided between spiral diversion grooves 31; a metal foil 32 is wrapped around the support core 2 and connected between the channels 31 and the relief grooves 25 by forge welding.
In this embodiment, the relief groove 25 need not be deep and the metal foil 32 is integrally wrapped over the support core 2 for forge welding. In the forging welding beating process, the connection part 32a of the metal foil 32 is connected with the protrusion 251 between the yielding groove 25 and the diversion trench 31, which is more beneficial to the tight connection with the metal foil 32.
The relief groove 25 is not necessarily a square groove, but may be an arc groove, etc., and a protrusion 251 may be formed between the relief groove 25 and the diversion trench 31; the relief groove 25 and the diversion groove 31 are not overlapped or crossed, but have the same path direction.
Examples
As shown in fig. 11 to 14, based on the structure of embodiment 1, the edge of the diversion trench 31 is provided with a step 311, and the connection portion 32a of the metal foil 32 is connected to the step 311.
In this embodiment, the metal foil 32 is strip-shaped, and the height of the step 311 is not required to be larger, and is slightly smaller than or equal to the thickness of the metal foil 31. When in installation, the width direction of the connecting part 32a of the metal foil 32 is just clamped on the steps 311 on two sides; the connecting part 32a is connected with the step 311 during forge welding, so that the sealing of the cooling channel 3 is facilitated while the accurate connecting position is ensured.
As shown in fig. 5 to 6, 9 to 10 and 13 to 14, when the cooling liquid passes through the cooling passage 3, the deformed portion 32b of the metal foil 32 bulges and abuts against the inner wall of the electrode cap 1, thereby realizing cooling of the electrode cap 1, and simultaneously, supporting the electrode cap 1, avoiding deformation of the electrode cap 1 due to long-time high temperature and pressure of the glass solution.
It should be noted that, the electrode shown in the drawing is only a part inserted into the furnace, and the bottom of the electrode is also provided with a connecting seat or a connecting flange connected with the furnace in actual use; the electrode cap 1 is also connected with a power supply device or related structures and the like, and the structures are all in the prior art and are not important matters of the application, so that the structure is not reflected in the application, but the integrity of the technical scheme of the application is not affected.
The guiding gutter 31 can have a plurality of places, and the guiding gutter 31 of a plurality of places is the same setting of route direction, can let in the coolant liquid respectively and cool off, and the cooling effect stack has improved cooling efficiency, has increased the support intensity to electrode cap 1 simultaneously.
During operation, cooling liquid is introduced before the furnace is heated; after the furnace stops working and is cooled, the cooling liquid is stopped from being fed, so that the influence of the excessive temperature of the furnace on the electrode is avoided. After the cooling liquid stops flowing, air needs to be introduced into the cooling channel 3, and the residual cooling liquid in the cooling channel 3 is air-dried to avoid corrosion to the support core 2 and the metal foil 32.
In addition, under severe working conditions, the platinum electrode cap 1 is corroded under the conditions of long-time high temperature and reduction, and holes are formed in severe cases, and the opposite positions of the holes are more likely to appear at the top end of the electrode cap 1. Therefore, the cooling channel 3 is not arranged at the top end of the electrode cap 1, and the situation that the cooling liquid is quickly gasified and exploded due to the glass liquid entering caused by corrosion and rupture of the electrode cap 1 is avoided to a certain extent.
The above embodiments are only for illustrating the technical concept and features of the present application, and are intended to enable those skilled in the art to understand the content of the present application and implement the same according to the content of the present application, and are not intended to limit the scope of the present application. It will be evident to those skilled in the art that the application is not limited to the details of the foregoing illustrative embodiments and that the present application may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it is therefore desired that the present application be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (10)

1. The high-temperature furnace electrode is characterized by comprising an electrode cap connected with a power supply device, wherein a support core is arranged in the electrode cap, and a cooling channel is arranged on the support core;
the outer wall of the supporting core is provided with a concave and communicated diversion trench, and is covered with a metal foil, the metal foil comprises a connecting part and a deformation part, and the diversion trench and the deformation part of the metal foil are structured into the cooling channel;
the deformation part forms a reserved gap with the inner wall of the electrode cap in the non-conduction state of the cooling channel, and deforms to be in abutting contact with the inner wall of the electrode cap in the conduction state of the cooling channel.
2. A high temperature furnace electrode according to claim 1, characterized in that: the connecting part is connected with the outer walls of the supporting cores at the two sides of the diversion trench; the deformation part covers the diversion trench;
the contact area of the metal foil and the inner wall of the electrode cap increases with the increase of the flow rate of the cooling liquid introduced into the cooling channel.
3. A high temperature furnace electrode according to claim 1, characterized in that: a first liquid inlet is formed in the support core; the second liquid inlet is formed in the upper end of the diversion trench towards the inside of the supporting core, and the first liquid inlet is connected with the second liquid inlet.
4. A high temperature furnace electrode according to claim 3, wherein: the support core is internally provided with a first liquid outlet hole, the lower end of the diversion trench is provided with a second liquid outlet hole towards the inside of the support core, and the first liquid outlet hole is connected with the second liquid outlet hole.
5. A high temperature furnace electrode according to claim 1, characterized in that: the support core is provided with a yielding groove, and the yielding groove and the diversion trench have the same path direction; the metal foil is coated on the supporting core and is connected to the bulge formed between the diversion trench and the abdication trench through forge welding.
6. A high temperature furnace electrode according to claim 1, characterized in that: the edge of the diversion trench is provided with a step, and the metal foil is connected to the step.
7. A high temperature furnace electrode according to claim 1, characterized in that: the supporting core is made of copper-based alloy and nickel-based alloy.
8. A high temperature furnace electrode according to claim 1, characterized in that: the metal foil is copper foil or carbon nano film.
9. The high temperature furnace electrode according to claim 4, wherein: the guiding gutter is the heliciform and is provided with a plurality of positions, and corresponding first feed liquor hole, second feed liquor hole, first play liquid hole and second go out liquid hole and also set up a plurality of positions respectively.
10. A high temperature furnace electrode according to claim 1, characterized in that: the electrode cap is made of platinum.
CN202310906705.9A 2023-07-24 2023-07-24 High-temperature melting furnace electrode Pending CN116634621A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310906705.9A CN116634621A (en) 2023-07-24 2023-07-24 High-temperature melting furnace electrode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310906705.9A CN116634621A (en) 2023-07-24 2023-07-24 High-temperature melting furnace electrode

Publications (1)

Publication Number Publication Date
CN116634621A true CN116634621A (en) 2023-08-22

Family

ID=87638617

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310906705.9A Pending CN116634621A (en) 2023-07-24 2023-07-24 High-temperature melting furnace electrode

Country Status (1)

Country Link
CN (1) CN116634621A (en)

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