CN101146382B - Arc furnace pressure ring assembly - Google Patents
Arc furnace pressure ring assembly Download PDFInfo
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- CN101146382B CN101146382B CN2007101617988A CN200710161798A CN101146382B CN 101146382 B CN101146382 B CN 101146382B CN 2007101617988 A CN2007101617988 A CN 2007101617988A CN 200710161798 A CN200710161798 A CN 200710161798A CN 101146382 B CN101146382 B CN 101146382B
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- ring assembly
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- piston
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000010949 copper Substances 0.000 claims abstract description 23
- 229910052802 copper Inorganic materials 0.000 claims abstract description 22
- 239000004332 silver Substances 0.000 claims abstract description 13
- 229910052709 silver Inorganic materials 0.000 claims abstract description 13
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 12
- 239000000956 alloy Substances 0.000 claims abstract description 12
- 229910001092 metal group alloy Inorganic materials 0.000 claims abstract description 7
- 230000005611 electricity Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 23
- 229910052751 metal Inorganic materials 0.000 abstract description 21
- 239000002184 metal Substances 0.000 abstract description 21
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract description 9
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 8
- 229910052804 chromium Inorganic materials 0.000 description 8
- 239000011651 chromium Substances 0.000 description 8
- 238000006073 displacement reaction Methods 0.000 description 8
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- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 210000004907 gland Anatomy 0.000 description 2
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- 238000004519 manufacturing process Methods 0.000 description 2
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- 238000009853 pyrometallurgy Methods 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 229910001316 Ag alloy Inorganic materials 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
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- 239000012528 membrane Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention provides for a pressure ring assembly [10] suitable for use in an electric arc furnace, wherein the pressure ring assembly [10] comprises at least two pressure ring segments [22] engaging each other, at least one contact shoe [50] arranged between the pressure ring [20] and an electrode, and a piston arrangement [40] between the pressure ring segment [22] and the contact shoe [50] for forcing the contact shoe [50] into electrical contact with the electrode. The pressure ring assembly [10] is characterised therein that it is made of a metal alloy wherein a first metal of the alloy is copper, and a second metal is selected from a group comprising of chrome and silver. The pressure ring assembly [10] is further characterised therein that each pressure ring segment [22] includes two tapered engagement formations [27] defined within the pressure ring segment [22] and being adapted to be engaged by complimentarily tapered connecting means [60] such that the pressure ring segments [22] are drawn towards each other during installation of the pressure ring assembly. The pressure ring assembly [10] further provides for a sealing arrangement between the pressure ring and the contact shoe [50].
Description
The present invention be proposed on January 19th, 2005, name is called the dividing an application of application for a patent for invention No.200580006485.4 of " pressure ring assembly of arc furnace ".
Invention field
The present invention relates to a kind of pressure ring assembly that is applicable to arc furnace, especially but not exclusively relate to the pressure ring assembly on a kind of bottom that is applicable to electrode column.
Background technology
Arc furnace is used for the steel and alloy manufacture usually in the smelting operation process of pyrometallurgy.Arc furnace comprises one or more electrodes, and these one or more electrodes extend in this arc furnace, and in use is set near furnace load, to be used in the smelting operation supply capability.Transformer places the outside of arc furnace usually, and electric power is delivered to electrode by means of contact shoes from this transformer, and wherein, said contact shoes engages around electrode and with this electrode along circumferential array releasedly.
Be appreciated that contact shoes must be kept with interelectrode and suitably electrically contact in order to realize best electric power conductivity in all correlation times.In order under abominable usually operating condition, to keep suitably electrically contacting between contact shoes and the electrode, pressure ring edge usually circumferentially is arranged on around the contact shoes, and its size is arranged to keep a plurality of contact shoes to contact with electrode electricity.
In industry, run into various pressure ring devices, comprise continous way pressure ring (so-called solid torus (solid ring)) and segmented pressure ring, said segmented pressure ring comprises a plurality of segmental arcs, and a plurality of segmental arc interconnection form annulus.General preferred employing segmented pressure ring, this is because when using solid torus, exists relevant with the contact shoes replacement of element difficult in maintenance.
One of them difficulty that the segmented pressure ring is run into relates to bindiny mechanism, and wherein, adjacent ring section utilizes this bindiny mechanism to interconnect.First difficulty is that the bindiny mechanism that can get always is difficult to connect and separate, and in a single day separately, even be difficult to more connect again.This especially has problem under the situation of the bindiny mechanism that uses hinge and pin pattern (hinge-and-pin-type).Another problem relevant with known bindiny mechanism is that for using this mechanism, the adjacent ring section of pressure ring needs to aim at fully, and these mechanisms are not configured to help when the said respectively ring of installation section, it is aimed at.And known bindiny mechanism (comprise hinge and pin pattern with the bindiny mechanism parallel pin pattern) only design is used for preventing the displacement each other in use of said each section, but its can in installation process, will not be close to section draw closelyer each other.
The important requirement of another of relevant contact shoes is that it must preferably place the electrode bottom relatively lowly.Yet, this just mean contact shoes and therefore pressure ring will be very near the high-temperature part of arc furnace.Therefore pressure ring is exposed in the harsh environmental conditions.Opposite with electrode, pressure ring does not classify as easily-consumed products, and therefore must be able to stand abominable furnaceman makes condition, with life-saving.
Under this condition of work of pressure ring, the most important design parameter in decision pressure ring life-span normally dissipates and enough mechanical strengths through the available heat of pressure ring.Various solutions have been proposed, with through optimizing and/or controlling the life-span that above-mentioned design standard prolongs pressure ring.
First kind of solution (this solution is implemented in so-called " split type design ") is proposed in the neighboring and the bottom surface periphery that are exposed to the pressure ring under the severe operating condition most a heat shield is provided.Heat shield is processed by the material with good heat-conductivity characteristics, like copper.Owing to be that pressure ring rather than heat shield absorb the power that is applied on the contact shoes, heat shield can have limited mechanical strength.Therefore heat shield will protect pressure ring to avoid being exposed to too high furnace temperature, and the thermal conductivity of pressure ring becomes so not crucial.Yet, because size is complicated, this solution more complicated, may not cost effective and often infeasible.
Second workaround (in so-called " combined type design ", implementing usually) is proposed to make pressure ring with the material such as the fine copper of good heat-conductivity characteristics.Yet fine copper lacks can stand the mechanical strength of the power on the pressure ring that is applied to by contact shoes, and is easy to creep especially.The generation of creep is proportional with the temperature of pressure ring in addition, and this just causes fine copper generally to be inappropriate for use.In order to overcome the shortcoming of mechanical strength aspect, must have sizable size by the pressure ring of fine copper manufacturing, thereby allow that the maximum stress in the pressure ring is reduced to such degree, promptly makes below the acceptable limit of being created in of creep.Yet this just causes pressure ring to become heavy and huge, and thereby makes expensive and be difficult to and operate.Owing to be used for the insufficient space of big pressure ring, this pressure ring is also incompatible with the standard stove configuration.
A method as compromise is to consider to use mechanical strength to be better than the material of fine copper, but it has the thermal conductivity that is lower than fine copper as trading off.Therefore pressure ring by this material is processed will can deal with the stress that is caused by contact shoes, still quite adapt to the severe temperatures condition simultaneously.The material of carbon steel, stainless steel and aluminium bronze and so on uses in industry widely, and still, these materials all have the drawback of suboptimum thermal conductivity, and therefore has influence on the life-span of pressure ring unfriendly.
Another aspect of the pressure ring assembly that often goes wrong is the contact-making surface between pressure ring and the contact shoes.Contact shoes promotes towards electrode from pressure ring, so that combine with it.This generally can use hydraulic piston device or some other machine driven systems to obtain.
Known multiple hydraulic piston device in industry.In most devices, piston places in the booster cavity that the concave surface the pressure ring section limits.Fluid is introduced booster cavity through the runner that is embedded in the pressure ring section under pressure, and piston is applied outside hydraulic coupling, and this piston passes to contiguous contact shoes with power successively, to force contact shoes and electrode engagement.Only the booster cavity between pressure ring section and piston could best work when suitably being sealed to be appreciated that this device, because otherwise can not improve pressure in the booster cavity with power piston fully.In addition, the sealing device between pressure ring section and the piston should be able to adapt to the relative displacement between pressure ring and the piston.
Various sealings had been adopted before during this is used.For example rubber membrane is owing to its intrinsic elasticity is used, and is still verified, is not easy to premature failure owing to it fits into hot conditions.
The another kind of pattern of elastic packing is a metal bellows, and its use in pressure ring assembly has had effect.Prior art provides the metal bellows of two kinds of patterns in the pressure ring, and bellows and board-like or diaphragm bellows promptly are shaped.Bellows through even metal pipe or sleeve being configured as continuous reeling is produced shaping wave line pipe, and diaphragm bellows is formed by the single thin plate of distortion under pressure.
Yet, use shaping bellows and diaphragm bellows all to run into some problems.At first, the shaping bellows has occupied sizable space, therefore causes the diameter of piston necessary less, so that the booster cavity that is assemblied in the pressure ring section is inner.The diameter of piston is more little, and the hydraulic pressure that needs is just high more, so that identical power is applied on the contact shoes.
And second related problem of shaping bellows and diaphragm bellows is to have only spiraling of limited quantity can be contained in the little space between piston and the booster cavity, and spiraling of this relative lesser amt must be satisfied the required displacement of piston.This just causes to spiral and exceeds optimal design criteria, and it causes in bellows producing high stress and metal fatigue conversely, and needs higher hydraulic pressure to obtain enough pistons to move.And diaphragm bellows has low displacement possibility and heavily stressed problem, causes metal fatigue and premature failure.
As the replacement of hydraulic means, machine driven system also has been used for contact shoes is promoted towards electrode.Yet these systems have shortcoming complicated and that be easy to lose efficacy, and therefore can not be as the suitable replacement of hydraulic means.
Those skilled in the art it will be appreciated that arc furnace operates under negative pressure, this just means that existence sucks the trend in the stove with atmosphere.Near electrode (being the outstanding place of passing furnace roof of electrode), this can cause undesired because the CO burning that the pyrometallurgy course of reaction in the stove is caused has increased near the temperature of pressure ring thus.This can cause the overheated and fracture of pressure ring, contact shoes and piston.
It will be understood that also electrode and element thereof pressurize by means of fan, this fan makes that to be blown into air downward along electrode, so that above stove, produce sealing gland, escapes and prevents thus upwards to form the gas chimney along electrode to prevent furnace gas.Around pressure ring assembly, forming under the situation of inappropriate sealing, the undesired escape of furnace gas can make sealing gland worsen, and also can cause the infringement to electrode member.
Prior art does not almost contribute to the sealing between pressure ring and the contact shoes, and at most just suggestion is filled in heat-resisting cotton or soft fire clay in the gap between pressure ring and the contact shoes.The common integrality of this expedient sealing is lower, and (under the situation of in stove, blasting) often collapsed piston when unexpected pressure taking place in stove increasing.
The object of the invention
Thereby, the purpose of this invention is to provide a kind of pressure ring assembly, this pressure ring assembly part is at least eliminated the shortcoming relevant with existing pressure ring assembly, and/or it is new and useful alternative to be that existing pressure ring assembly provides.
Summary of the invention
According to the present invention, a kind of pressure ring assembly that is applicable to arc furnace is provided, this pressure ring assembly comprises pressure ring, it is characterized in that this pressure ring processed by metal alloy, and wherein, first kind of metal in the alloy is copper, and second kind of metal selected from the group that chromium and silver are formed.
This alloy can comprise at least 97% copper.When second kind of metal was chromium, alloy can be included in the chromium between 0.5% and 3.0%, especially 1.5% chromium.When second kind of metal was silver, alloy can be included in the silver between 0.05% and 0.5%, especially 0.15% silver.
Another characteristic of the present invention has provided a kind of purposes of metal alloy, and this metal alloy is used to make the pressure ring that is applicable to arc furnace, and first kind of metal in this alloy is copper, and second kind of metal is selected from the group of being made up of chromium and silver.
According to second aspect of the present invention; A kind of pressure ring assembly that is applicable to arc furnace is provided; This pressure ring assembly comprises at least two pressure ring sections; Thereby these two pressure ring section sizes are suitable for being bonded with each other and form pressure ring around the electrode, and each pressure ring Duan Jun has top, bottom, two relative sides, towards the inner surface and the opposed outer surface of electrode; Pressure ring assembly is characterised in that each pressure ring section includes near relative side and two connected structures that between top and bottom, extend at least in part; The characteristic of each connected structure also is; Its qualification is formed at least one surface of pressure ring section and with respect to side convergent at least in part, and connected structure is suitable for being engaged by jockey, therefore; In the process that pressure ring assembly is installed, the pressure ring section is moved to together toward each other.
Each connected structure can be continuous slim-lined construction basically, and can outstanding projection limit and forms the groove in the surface that is embedded in the pressure ring section or from the surface of this pressure ring section.Connected structure can comprise antelabium, and this antelabium size is suitable for and limits the antelabium connected structure be formed on the complementary sized in the jockey and cooperate, so that between connected structure and jockey, produce firm engagement.
In a preferred embodiment of the invention, connected structure comprises two elongated groove, and its qualification is formed near the inner surface of the pressure ring section the relative side, and between top and bottom convergent downwards.Especially, elongated groove from the top down to the bottom convergent leave side.
According to a further aspect of the invention, be provided for making the jockey of the adjacent pressure ring section interconnection of the pressure ring assembly that is applicable to arc furnace, this jockey is characterised in that; It comprises interconnective two shanks by means of the mid-span part; Wherein, said shank is relative to each other and with respect to the prolongation axis of jockey convergent at least in part, and jockey also is suitable for engaging with the pressure ring section; Like this, the pressure ring section is pulled together toward each other in the installation process of pressure ring assembly.
Jockey can be to be suitable for the elongated carriage that is connected that engages with the pressure ring section.Especially, jockey can be elongated slipper bracket, and it is suitable for sliding into limiting in the convergent connected structure that is formed on the complementation in the pressure ring section or above that and slides.
The cross-over connection part can stride across the length of jockey basically.Replacedly, the cross-over connection part can be included in a plurality of isolated cross-brace of extending between the shank of jockey.
According to one embodiment of the present of invention, jockey comprises two independently shank and one mid-span parts independently.In an interchangeable embodiment of the present invention, shank can be limited the end regions of the sheet material of arc and form.The lateral cross section profile of jockey can be roughly C shape, U-shaped or V-arrangement.
According to another aspect of the present invention, a kind of pressure ring assembly that is applicable to arc furnace is provided, pressure ring assembly comprises at least one pressure ring section, at least one contact shoes and piston apparatus; Wherein, said contact shoes radially inwardly is provided with from the pressure ring section, and said piston apparatus comprises the piston that places between pressure ring section and the contact shoes; To force contact shoes to contact with electrode electricity; Piston apparatus comprises the booster cavity that is communicated with the high-pressure fluid source flow, and this piston apparatus comprises the seal in the booster cavity, so that this booster cavity is sealed; Wherein, Seal is characterised in that the seal disc that it comprises a plurality of packing ring shapes, and these a plurality of seal discs are arranged side by side and are welded together, to form flexible accordion shape bellows.
Especially, seal comprises metal dish a plurality of almost parallels, thin, annular, and these a plurality of metal dish are circumferentially welded together each other, thereby forms accordion shape bellows.Replacedly, seal can comprise a plurality of pads that are arranged between the metal dish, and under this kind situation, metal dish is welded on the pad.
The thickness of annular disk can be between 0.1mm and 2mm.
Another characteristic has provided to be arranged to and liquid supply passage and the mobile booster cavity that is communicated with of fluid return passageway.In a form of the present invention; Liquid supply passage and fluid return passageway can be embedded in the pressure ring section; And can limit the formation first flow jointly with booster cavity, this first flow is used for FLUID TRANSPORTATION through pressure ring section and booster cavity, so that the power piston device also cools off this pressure ring section simultaneously.In replaceable form of the present invention, the pressure ring section can comprise independently second runner, and it is embedded in the pressure ring section, passes through the pressure ring section to be used for conveyance fluid, thereby with its cooling.
In another replaceable form of the present invention, liquid supply passage and fluid return passageway can be arranged on the outside of pressure ring section.
Booster cavity can be limited housing and form, and it is characterized in that, housing is to be processed by the material that thermal conductivity is at least 100 watts of every meter Kelvins.
The characteristic of piston apparatus is that also it comprises second seal that is arranged between piston and the housing.Especially, second seal can be arranged in the annular gap that forms between the housing of piston and sleeve shaped.Especially, piston can comprise the circumferential recess that is used to receive second seal.Second seal can be the becket form.
According to another aspect of the present invention, a kind of pressure ring assembly that is applicable to arc furnace is provided, this pressure ring assembly comprise be arranged on the pressure ring around the electrode and be arranged on pressure ring and electrode between contact shoes; Like this, between pressure ring and contact shoes, form the annular gap, pressure ring assembly is characterised in that; It is included in the sealing device between pressure ring and the contact shoes; The sealing device comprises or both grooves that is arranged in pressure ring and contact shoes, and seal is trapped in the groove, with the sealing annular gap.
Seal can be an elastic sealing element, and in a preferred form of the invention, seal also can be biased, so that perseverance seals the annular gap in contact shoes displacement process.The sealing part can be an insulating material, especially can be by pottery or optional being processed by carborundum.
Seal can be included in a plurality of seal sections of arranging with the form that joins end to end in the groove, so that form roughly continuous ring packing.
Description of drawings
Below narrate embodiments of the invention with the non-limiting example mode with reference to accompanying drawing, wherein:
Fig. 1 is the perspective view according to pressure ring assembly of the present invention;
Fig. 2 is the vertical view of pressure ring assembly shown in Figure 1;
Fig. 3 is the side cross-sectional view of pressure ring assembly shown in Figure 1;
Fig. 4 is the sectional top view of pressure ring assembly shown in Figure 1;
Fig. 5 is the sectional top view according to jockey of the present invention;
Fig. 6 is the side cross-sectional view according to sealing device of the present invention;
Fig. 7 is the cross sectional view of bellows that is used for the pressure ring assembly of Fig. 1;
Fig. 8 is the front view according to a pressure ring section of the present invention;
Fig. 9 is two perspective views according to jockey of the present invention; And
Figure 10 is the creep rate of the various materials of expression and the diagram of the relation between the temperature.
Embodiment
With reference to accompanying drawing, with Reference numeral 10 total represent non-limiting example according to pressure ring assembly of the present invention.Pressure ring assembly 10 comprises pressure ring 20, a plurality of contact shoes 50 and a plurality of piston apparatus 40; Wherein, This pressure ring 20 comprises the pressure ring section 22 of a plurality of interconnection, and said a plurality of contact shoes 50 are adjacent to effective inner surface 36 of pressure ring 20, and said a plurality of piston apparatus 40 place between each contact shoes 50 and the pressure ring 20.In use, pressure ring 20 and contact shoes 50 are around the electrode (not shown) that uses in the arc furnace (not shown).
When seeing on vertical view according to the pressure ring 20 of specific embodiment is annulus, and two adjacent pressure ring sections 22 of pressure ring are shown in Fig. 1 and 2.Each pressure ring section is an arc when on vertical view, seeing, and comprises outer surface 35 that deviates from electrode and the inner surface 36 that faces the electrode (not shown).Each pressure ring section has top 24 and bottom 25, and the bottom is in this embodiment with roughly L shaped part termination.Circumferential recess 33 is provided with towards the bottom 25 of pressure ring section 22, and in this concrete structure, groove 33 is positioned on the surface of the L shaped part of contact shoes 50.Seal 54 places in the groove, and hereinafter it is described in detail.Suspension 23 is 24 extensions from the top, thereby and are used for also just being suspended on the suspension 51 that is connected to contact shoes 50 to pressure ring section 22 to pressure ring 20.
Each pressure ring section 22 also has relative parallel side ends 26, and side 26 is with respect to top 24 and bottom 25 approximate vertical.Connected structure 27 is positioned near the side 26, and extends at least in part between the top 24 and bottom 25 of pressure ring section 22.In this specific embodiment; Connected structure 27 is the form of grooves that is arranged in the inner surface 36 of pressure ring section 22, but it will be understood that connected structure can be elongated projection form; Rather than form of grooves, and connected structure can be arranged in the outer surface 35 rather than the inner surface 36 of pressure ring section 22.Groove 27 is convergents with respect to side 26, and especially from the top 24 down to bottom 25 convergents leave side 26.In specific embodiment, groove 27 still be appreciated that a part of having only each groove need be a convergent, and remainder for example can be parallel with respect to side 26 along its whole length convergent.
Like what seen from Fig. 1 and 5, groove 27 also towards the side 26 of pressure ring section 22 by undercutting so that form antelabium 28, this antelabium 28 helps adjacent pressure ring section 22 is permanently connected.
Adjacent pressure ring section 22 is connected by means of the jockey 60 that outside convergent perhaps turns to releasedly.In this specific embodiment, jockey is elongated slipper bracket form, shown in the perspective view of Fig. 9.Each slipper bracket 60 includes two spindlelegs portions 61, and these two shanks 61 interconnect by means of the cross-over connection part 62 of centre.These two elongated leg 61 are relative to each other and with respect to prolongation axis 64 convergents of slipper bracket 60, and these two shank 61 bifurcateds especially, so that cooperate with the tapered recesses 27 of complementation in the contiguous pressure ring section 22.Cross-over connection part 62 shown in this embodiment is the roughly solid plate shape part of extending between shank 61 along the whole length of shank 61 basically, and still, the cross-over connection part also can comprise a plurality of isolated cross-brace (not shown).It will be understood that shank and cross-over connection part can be integrally formed, for example form, perhaps form through the cast steel casting by the sheet material that bends to suitable shape.Slipper bracket 60 also is included in used hole 63 in the slipper bracket 60 installation and removal processes.As can be as can be seen from Figure 5, slipper bracket 60 is being roughly C shape when sectional top view is seen.Similarly, also U-shaped or V-arrangement of carriage.
In use, two pressure ring sections 22 are provided with adjoining each other, and therefore, contiguous groove 27 has formed two diverging channels or connected structure.Through being provided in the side 26 of pressure ring section, mating holes 29 and aligning protuberance 34 be convenient to correctly aim at.Jockey 60 inserts from the top 24 of pressure ring section 22 subsequently, so that spindlelegs portion 61 is got in the groove 27 from the top.When downwards promoting jockey 60, shank 61 engages with groove 27 and antelabium 28, like this just because of the tapered configuration of slipper bracket 60 and groove 27 force two pressure ring sections 22 toward each other near.It will be understood that groove 27, and the therefore shank 61 of slipper bracket 60, needn't be bifurcated or convergent along its whole length.Clamping device 61 parts can roughly be parallel with groove 27, as long as at least some parts (no matter being top or bottom) are convergents.
Contact shoes 50 is positioned near the inner surface 36 of each pressure ring section 22.In the pressure ring assembly of accomplishing 10, therefore contact shoes 50 radially inwardly is provided with from pressure ring, and like this, pressure ring 20 is just around contact shoes 50.Contact shoes 50 can be with respect to 22 displacements of pressure ring section, so that can engage with placing pressure ring 20 and contact shoes 50 inner electrode (not shown).When having engaged electrode, reaction force is applied on the contact shoes towards pressure ring section 22, and this contact shoes absorbs this reaction force conversely.The weight that is noted that contact shoes 50 is carried by contact shoes suspension 51, rather than is carried by pressure ring section 22.
As shown in Figure 3, piston apparatus 40 is located on each pressure ring section 22, so that contact shoes 50 moves with respect to pressure ring section 22.This piston apparatus 40 comprises booster cavity 42, and this booster cavity 42 is formed by the housing 43 of piston 41, sleeve shaped and the inner surface 36 of pressure ring section 22.Utilize the seal 44 of bellows form that the housing 43 of piston 41 with respect to pressure ring section 22 and sleeve shaped is connected movably, sealing part 44 also is used for sealing booster cavity 42.Bellows 44 illustrates in greater detail in Fig. 7, and comprises metal dish 46 like a plurality of packing rings, and metal dish 46 is provided with the pad 49 that is located at therebetween abreast.The outward flange of metal dish 46 is welded on the pad 49, and inward flange 47 is welded to each other together, thereby forms the concertina bellows.The bellows of this pattern often is called plate bellows (leaf bellows).In use, bellows 44 can be along the indicated direction displacement of arrow A.The thickness of metal dish is usually between 0.1mm and 2mm.
First end of bellows 44 is welded on the piston 41, and second end of bellows 44 is welded on the inner surface of housing 43 of sleeve shaped.This structure causes piston 41 to move with respect to bellows housing 43, but is still sealed with respect to bellows housing 43 simultaneously.Therefore booster cavity 42 is still sealed along the whole stroke of piston 41 continuously.Piston 41 is with respect to the mobile restriction that receives stroke limiter 45 of pressure ring section 22, and this stroke limiter 45 can be various structures, but especially can be located at the structure of the bolt form of desired location.
The pressure of booster cavity 42 increases, so that external force is delivered on the piston 41.The elasticity of bellows 44 allows that piston 41 moves away pressure ring section 22, so as in use to promote contact shoes 50 and electrode (not shown) near.It will be understood that piston apparatus 40 can be the cartridge type piston component, in this case, booster cavity 42 will limit the housing 43 of piston 41, sleeve shaped with from the end plate that the housing 43 of sleeve shaped extends and form.This assembly will be separated with the pressure ring section, and will only place the inside grooves that is located at the pressure ring section.
In use, even second runner 32 is inoperative, also can remove the heat in the pressure ring section through the fluid in the first flow 31, vice versa.Even this is useful aspect pressure ring section is still remained valid after the use at the first flow 31 or second runner 32 has stopped because of the for example inefficacy of bellows 44; This is owing to will provide sufficient heat to transmit via remaining runner, can be closed to be used for maintenance up to system.This is that heat is transmitted and the main improvement of the other system of piston displacement to carrying out through single shared passage.It will be understood that the first flow 31 and second runner 32 can place the outside of pressure ring section 22 when using aforesaid cartridge type piston component.
As stated, seal 54 places in the groove 33 of bottom 25 of pressure ring section 22.The bottom 53 of contact shoes 50 limits and forms relative sealing surfaces, so that the annular gap between sealing contact shoes 50 and the pressure ring 20.The sealing device is shown in Fig. 6 in further detail.The sealing part can comprise a plurality of seal sections of setting adjacent one another are, thereby forms roughly continuous circumferential seal.It will be understood that and to use various combinations,, circumferential recess is provided all in pressure ring and contact shoes perhaps as in the contact shoes relative, circumferential recess being provided with pressure ring., this can adopt various seals 54 in using.For example, can use ceramic seal spare, in this case, through between seal and groove, spring washer being set, seal can be by towards the sealing station bias voltage.In interchangeable mode, can use elastic sealing element, will need not use spring washer or analog in this case.
The inventor surprisingly finds, copper/chromium and copper/silver-colored microalloy has been verified to be specially adapted to this application.Alloy to the chromium of the silver and 1.5% (by weight) that comprises 0.15% (by weight) experimentizes, and has write down improved performance.For example, the improvement performance of copper and silver (being expressed as CuAg in the drawings) is shown in Fig. 9, and Fig. 9 is the comparison between the relation curve of at high temperature per 1000 hours creep of material different and stress.Can find out obviously from figure that copper/silver alloy can for example stand higher stress under oxygen-free copper (CuOF) and the identical creep rate that high heat-conducting copper (HCCu) is experienced at material that tradition is used.With pure copper by comparison; Silver or chromium add the thermal conductivity that reduces material in the copper a little; But thermal conductivity still within the acceptable range; Especially its thermal conductivity is still up to 6.5 times of the thermal conductivity of aluminium bronze and carbon steel, and up to 20 times of stainless thermal conductivity, and these materials are all former to be used for this and to use.
Have been found that correct material is selected to help to prolong the useful life of pressure ring assembly in fact and increase reliability when design bellows housing 43 and piston 41.About this point, have been found that the material that uses thermal conductivity to surpass 100 watts of every meter Kelvins, like copper, improved the cooling capacity of bellows housing and piston in fact, therefore cause having prolonged expected service life.
It will be understood that above just one embodiment of the present of invention, and under the situation that does not depart from spirit that the present invention advocated and scope in claim, can make the change of various details.
Claims (4)
1. pressure ring assembly (10) that is applicable to arc furnace; This pressure ring assembly (10) comprises pressure ring (20), it is characterized in that, this pressure ring (20) is processed by metal alloy; Said alloy comprises that weight ratio is 97% copper at least, and the silver of weight ratio between 0.05% and 0.5%.
2. pressure ring assembly as claimed in claim 1 (10) is characterized in that said alloy comprises the silver of weight ratio 0.15%.
3. the purposes of a metal alloy, it is used to make the pressure ring (20) that is applicable to arc furnace, and wherein, said alloy comprises that weight ratio is 97% copper at least, and the silver of weight ratio between 0.05% and 0.5%.
4. pressure ring assembly (10) that is applicable to arc furnace, this pressure ring assembly (10) comprises at least two pressure ring sections (22), said pressure ring section (22) size is suitable for being bonded with each other; Thereby form pressure ring (20) around electrode; Each pressure ring section (22) all has top (24), bottom (25), two relative sides (26), the inner surface (36) that faces electrode and opposed outer surface (35), and this pressure ring assembly (10) also comprises at least one contact shoes (50) and piston apparatus (40), and this at least one contact shoes (50) is arranged between pressure ring (20) and the electrode; So just between pressure ring (20) and contact shoes (50), form the annular gap; This piston apparatus (40) comprises the piston (41) that is positioned between pressure ring section (22) and the contact shoes (50), contacts with electrode electricity to promote contact shoes (50), and pressure ring assembly (10) is characterised in that; Pressure ring (20) is processed by metal alloy; Wherein, said alloy comprises that weight ratio is 97% copper at least, and the silver of weight ratio between 0.05% and 0.5%.
Applications Claiming Priority (14)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ZA200400360 | 2004-01-19 | ||
| ZA2004/0360 | 2004-01-19 | ||
| ZA2004/0938 | 2004-02-05 | ||
| ZA2004/0936 | 2004-02-05 | ||
| ZA2004/0937 | 2004-02-05 | ||
| ZA200400937 | 2004-02-05 | ||
| ZA200400938 | 2004-02-05 | ||
| ZA200400936 | 2004-02-05 | ||
| ZA200406208 | 2004-08-04 | ||
| ZA2004/6209 | 2004-08-04 | ||
| ZA2004/6208 | 2004-08-04 | ||
| ZA200406209 | 2004-08-04 | ||
| ZA200408292 | 2004-10-14 | ||
| ZA2004/8292 | 2004-10-14 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200580006485A Division CN100584131C (en) | 2004-01-19 | 2005-01-19 | Arc furnace pressure ring assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101146382A CN101146382A (en) | 2008-03-19 |
| CN101146382B true CN101146382B (en) | 2012-08-08 |
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Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200580006485A Active CN100584131C (en) | 2004-01-19 | 2005-01-19 | Arc furnace pressure ring assembly |
| CN2007101617988A Active CN101146382B (en) | 2004-01-19 | 2005-01-19 | Arc furnace pressure ring assembly |
| CN2007101617992A Active CN101155443B (en) | 2004-01-19 | 2005-01-19 | Arc furnace pressure ring assembly |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200580006485A Active CN100584131C (en) | 2004-01-19 | 2005-01-19 | Arc furnace pressure ring assembly |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101617992A Active CN101155443B (en) | 2004-01-19 | 2005-01-19 | Arc furnace pressure ring assembly |
Country Status (2)
| Country | Link |
|---|---|
| CN (3) | CN100584131C (en) |
| ZA (5) | ZA200703371B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI123373B (en) * | 2008-06-06 | 2013-03-15 | Outotec Oyj | sealing device |
| FI124937B (en) * | 2012-12-20 | 2015-03-31 | Outotec Oyj | sealing device |
| FI125431B (en) | 2013-08-27 | 2015-10-15 | Outotec Finland Oy | Arrangement for sealing the bellows cylinder in the compression block of the compression ring assembly |
| FI125874B (en) * | 2013-08-27 | 2016-03-15 | Outotec Oyj | Pressure ring assembly for contact shoes in an electrode system |
| FI125964B (en) * | 2013-08-27 | 2016-04-29 | Outotec Finland Oy | Arrangement for cooling ducts in an electrode system |
| CA2926760C (en) | 2013-10-08 | 2016-10-11 | Hatch Ltd. | Furnace cooling system with thermally conductive joints between cooling elements |
| DK3137835T3 (en) | 2014-04-28 | 2022-09-12 | Hatch Ltd | Sleeve seal for electric furnace electrodes |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3717445A (en) * | 1969-11-12 | 1973-02-20 | Mitsubishi Steel Mfg | Electrode holder for electric arc furnace and make the same |
| FR2159779A5 (en) * | 1971-11-12 | 1973-06-22 | Inst Elektroswarki Patona | Plasmatron adjuster - for plasma arc furnace with compressed air drive |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2363958A1 (en) * | 1976-09-07 | 1978-03-31 | Bozel Electrometallurgie | High power furnace contact plate - forms piston biased into contact with electrodes by hydraulic pressure of coolant |
-
2005
- 2005-01-19 CN CN200580006485A patent/CN100584131C/en active Active
- 2005-01-19 ZA ZA200703371A patent/ZA200703371B/en unknown
- 2005-01-19 ZA ZA200703374A patent/ZA200703374B/en unknown
- 2005-01-19 ZA ZA200703372A patent/ZA200703372B/en unknown
- 2005-01-19 ZA ZA200703373A patent/ZA200703373B/en unknown
- 2005-01-19 CN CN2007101617988A patent/CN101146382B/en active Active
- 2005-01-19 CN CN2007101617992A patent/CN101155443B/en active Active
-
2006
- 2006-05-25 ZA ZA200604237A patent/ZA200604237B/en unknown
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3717445A (en) * | 1969-11-12 | 1973-02-20 | Mitsubishi Steel Mfg | Electrode holder for electric arc furnace and make the same |
| FR2159779A5 (en) * | 1971-11-12 | 1973-06-22 | Inst Elektroswarki Patona | Plasmatron adjuster - for plasma arc furnace with compressed air drive |
Non-Patent Citations (1)
| Title |
|---|
| 权利要求1,2和6、附图1. |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101155443A (en) | 2008-04-02 |
| ZA200703371B (en) | 2009-12-30 |
| CN1926923A (en) | 2007-03-07 |
| ZA200703374B (en) | 2009-12-30 |
| ZA200703373B (en) | 2009-12-30 |
| CN101146382A (en) | 2008-03-19 |
| CN100584131C (en) | 2010-01-20 |
| ZA200604237B (en) | 2010-01-27 |
| CN101155443B (en) | 2011-05-25 |
| ZA200703372B (en) | 2009-12-30 |
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