US3430663A - Hose line for sucking off hot gases,particularly in the vacuum degassing of large metal and steel batches - Google Patents

Hose line for sucking off hot gases,particularly in the vacuum degassing of large metal and steel batches Download PDF

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Publication number
US3430663A
US3430663A US272186A US3430663DA US3430663A US 3430663 A US3430663 A US 3430663A US 272186 A US272186 A US 272186A US 3430663D A US3430663D A US 3430663DA US 3430663 A US3430663 A US 3430663A
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US
United States
Prior art keywords
hose
vacuum
hot gases
flexible
layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US272186A
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English (en)
Inventor
Adolf Sickbert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fried Krupp Huettenwerke AG
Original Assignee
Fried Krupp Huettenwerke AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DEB66782A external-priority patent/DE1266778B/de
Application filed by Fried Krupp Huettenwerke AG filed Critical Fried Krupp Huettenwerke AG
Application granted granted Critical
Publication of US3430663A publication Critical patent/US3430663A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/12—Hoses, i.e. flexible pipes made of rubber or flexible plastics with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting
    • F16L11/125—Hoses, i.e. flexible pipes made of rubber or flexible plastics with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting non-inflammable or heat-resistant hoses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D45/00—Equipment for casting, not otherwise provided for
    • B22D45/005—Evacuation of fumes, dust or waste gases during manipulations in the foundry
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/10—Handling in a vacuum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/14—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics
    • F16L11/16—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics wound from profiled strips or bands
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/14—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics
    • F16L11/18—Articulated hoses, e.g. composed of a series of rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L23/00—Flanged joints
    • F16L23/04—Flanged joints the flanges being connected by members tensioned in the radial plane
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L27/00—Adjustable joints, Joints allowing movement

Definitions

  • a flexible line particularly a hose line
  • the vacuum tanks equipped with such hoses will, furthermore, be suitable for conveying off the material collected without removing the vacuum, e.g. towards a casting place distant from the melting furnace.
  • Hoses showing the properties necessary in such processes have not been available so far. Obviously, the problem of developing a hose having the properties particularly required in tap degassing, has not been solved as yet. In this, requirements have to be met that are partly contradictory and, as to the invention, require certain materials and the arrangement of such materials to make allowance of the various stresses to a large extent.
  • tanks particularly transportable vacuum tanks for degassing steel or other metals
  • flexible lines or hoses the walls of which comprise separate layers, the internal and external layers being spaced from one another.
  • the internal layer is composed of metallic members able to resist the pressure exerted on the hose line. Though connected with each other, these internal metallic members allow the hose line to be curved in all directions. The joints of the individual metallic elements of said hose line are, therefore, not vacuum tight.
  • the external layer of the hose line consists of an elastic material such as rubber or plastics. It may have reinforcements, e.g. annular or screw-shaped wires or threads. This elastic layer must be vacuum tight.
  • the two aforesaid layers i.e. the internal metallic bearing layer and the external vacuum tight elastic one, should be spaced from one another.
  • This spacing of the internal and external layers can be done in one way or another and by different means.
  • the spacer may be a layer of a heat resistant and thermal insulating material, such as asbestos, glass wool, or mineral wool, of a relatively loose condition, or metallic rings, coils, plaits or texture may assure the spacing.
  • the drawing shows some executions of the hose lines according to the invention as well as suitable connections ice of the hose lines to the vacuum tank and supports for the hose line end to be connected to the vacuum tank, further features of the invention likewise resulting therefrom.
  • FIGURE 1 shows a sectional view of a hose line comprising an internal metallic layer, an external flexible hose, and an intermediate loose layer of asbestos or the like.
  • FIGURES 2 and 3 show sectional views of hose lines comprising pipe members with turning or ball-and-socket joints and vacuum tight hose disposed above the pipe members, in the area of the joints at least, and spaced from pipe member and joint.
  • FIGURES 4 and 5 show hose lines connected to a vacuum tank, the ends of the hose lines being secured to a separate support.
  • FIGURES 6 and 7 show the quick coupling for connecting a hose line according to the invention to the vacuum tank socket.
  • FIG. 8 is similar to FIG. 2 showing a helically wound spacing means.
  • the wall of vacuum hose V comprises the internal metallic layer 1 being a metal hose here, the windings of which being easily displaceable against each other and not being vacuum tight.
  • Such layer 1 is followed by a loose, heat resistant and heat insulating layer 2, say of asbestos or mineral wool fibers, and then by the external layer, i.e. a vacuum tight sheath of a plastic material, e.g. of rubber or plastics.
  • This external sheath is reinforced by means of steel wires 4 to oppose the external pressure tending to press sheath 3 into the windings of the internal layer.
  • sheath 3 is pressed on a tubular end piece 5 of the internal layer, e.g. by means of pipe clips 6.
  • a duct 8 passes through external sheath 3 to allow gas inhibiting combustion to be conveyed to intermediate layer 2.
  • This duct may axially extend through intermediate layer 2 to have outlets 9 for the gas fitted at various points of the length.
  • the members of the internal layer such as strip or wire windings, adjacent rings or the like, should have a correspondingly smaller axial distance.
  • those members should be easily movable in axial direction to allow them, in case of bendings of the hose, to approach each other on the pressure side and, possibly, to remove themselves from one another on the tension side.
  • the internal metal hose preferably consists of a heat resistant metal, particularly of steel.
  • the intermediate loose layer first serves for the thermal insulation of the external vacuum tight layer that will not withstand temperatures possible in the suction line with vacuum treatment of steel, for instance exceeding 200 C. (rubber) or being from 400 to 800 C. (plastics).
  • the intermediate loose layer supports the flexibility of the hose.
  • Lubricants such as talc or the like there inserted will additionally assist this.
  • materials such as talc are not combustible.
  • the external layer should preferably have such elements spaced from each other, e.g. in the form of windings or rings.
  • a vacuum hose according to the invention will have an internal diameter exceeding mm. and, in general, ranging from to 500 mm.
  • the hose according to the invention is suitably designed so as to permit protective gas to be conveyed below the external layer.
  • ducts for the gas may be provided at one or both ends or between them.
  • channels may likewise be laid in longitudinal direction of the hose, e.g. small hoses having outlets for the gas in their circumference. Feeding of gas, particularly of nitrogen, will cool the hose during the vacuum treatment, particularly if due to the duration of vacuum treatment the internal temperature of the hose has considerably increased.
  • feeding of the protective gas may be done in such periods of vacuum treatment, where pyrophoric dusts occur, the gas then preventing such dusts from entering through the leaks of the internal layer necessary for the flexibility of the hose.
  • feeding of protective gas will prevent any pyrophoric dust infiltrated into the hose wall from glowing and burning due to airing of the interior of the hose.
  • pipe elements 11 and 12 are equipped with intermeshing spherical extremities 13 and 14.
  • An elastic hose 16 supported by spacers 15 is pulled over the ball joint and part of each pipe element.
  • the hose is closely pressed at its extremities by means of clips 17.
  • a duct 23 for cooling gas is provided.
  • the pipe elements 3536 and 36-30 respectively are telescoped by their ends.
  • One hose 31 each extending beyond the area of the telescoped pipe ends is closely pressed by means of clips 32.
  • 34 means a spray for applying compressed air.
  • Pipe elements and joints are preferably made of steel or metal, particularly of a heat resistant one.
  • Those sheaths can be rubber (up to about 200 C.) or plastics (up to about 450 C.), depending on the temperature stress in question.
  • the vacuum tight sheaths are practically spaced from the external parts of the joints and pipe elements by rings, coils, plaits or texture or the like of heat resistant material. This will serve the purpose considering the fact that continuous layers of heat resistant material would greatly increase the weight anyhow important of the flexible lines. Using thermal insulating material such as asbestos or the like is equally possible.
  • the flexible connections of the suction lines to the vacuum tank are preferably equipped with a quick coupling to reduce losses of time and, therefore, of temperature .in the vacuum tank until the beginning of casting to a minimum.
  • the vacuum hoses or flexible lines to be coupled to vacuum tanks of the aforesaid type have an adjustable support.
  • Such support should be designed in such a way as not only to permit quick coupling and uncoupling, but also to prevent the end getting loose of the hose or the flexible line from endangering the attendance crew.
  • the support should, therefore, assure ample stress equalization and possibly weight equalization of the free hose end.
  • the support preferably comprises a gallows or a similar suspension.
  • the rope of the gallows is fastened to the hose or flexible line at one end, the other end being equipped with a drawgear or a counterweight.
  • a resilience such as a spring or bufler, preferably at or near the connection of the rope end to the hose or the flexible line, will be suitable.
  • the gallows or the like suspension may be a pivoted or traveling one.
  • FIGURES 4 and show the arrangement of quick coupling and support.
  • a vacuum tap ladle 42 is placed on a traveling support 43.
  • the ladle has a cover 44 and a downgate 45 mounted vacuum tight.
  • the cover is equipped with a stationary suction stub 46.
  • Hose 55 has a suspension 50 near quick coupling 49 securing the hose to suction stub 46, rope 51 of gallows 52 being fixed to said suspension 50.
  • the other end of the rope is provided with a drawgear 53 (or a counterweight).
  • a resilience 54 is mounted between suspension 50 and rope 51.
  • FIGURE 5 is altered insofar as coupling end 57 of hose 55 hangs from above (or aslant from the above) over suction stub 46, the gallows turning about its pillar (at 56).
  • FIGURE 6 shows a well tried quick coupling 49 comprising flange 67 of the vacuum hose and flange 61 of suction stub 46. Between the flanges, there is a packing 62. The lower faces 63 and 63' respectively of the flanges are wedge shaped. The wedges are preferably self-releasing. They are spanned by a clamping ring provided with corresponding jaws 64 and 64' respectively. The clamping ring may be clamped and easily released by means of a quick coupling, particularly of a rolling key coupling.
  • FIGURE 7 shows an eccentric lock 26.
  • Clamping ring 65 has forks 69 and at its slit ends 67 and 68. Fork 69 bears joint 72 for eccentric rod 71, fork 70 serves as abutment for eccentric 73.
  • FIG. 8 shows a joint according to the invention using a helically wound spacer element 15.
  • a flexible vacuum hose for drawing off hot gases from evacuation vessels which comprises:
  • a flexible metallic conduit having an exterior surface and an interior passage for the flow of said hot gases
  • spacing means disposed between said exterior surface of the metallic conduit and said interior surface of the sheath and in abutting contact with said surfaces whereby to establish the said spacing relation therebetween which spacing means includes a plurality of metallic rings disposed at axial stations along said metallic conduit.
  • a flexible vacuum hose for drawing off hot gases from evacuation vessels which comprises:
  • a flexible metallic conduit having an exterior surface and an interior passage for the flow of said hot gases
  • spacing means disposed between said exterior surface of the metallic conduit and said interior surface of the sheath and in abutting contact with said surfaces whereby to establish the said spaced relation therebetween which spacing means includes a metallic helical core wrapped around the exterior of said conduit.
  • a flexible vacuum hose for drawing off hot gases from evacuation vessels which comprises:
  • a flexible metallic conduit having an exterior surface and an interior passage for the flow of said hot gases
  • a flexible sheath disposed around and covering the exterior surface of said insulation liner, with the interior surface of said sheath being in continuous 5 abutting contact therewith, and said sheath being made of a vacuum impervious material; and (d) At least one coolant gas distribution duct extending into the region between the interior surface of the vacuum impervious sheath and the exterior surface of the conduit, which duct has an inlet which 5 communicates with an external coolant gas source, and a plurality of apertures for distributing coolant gas into the aforesaid region.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Thermal Insulation (AREA)
US272186A 1962-04-12 1963-04-09 Hose line for sucking off hot gases,particularly in the vacuum degassing of large metal and steel batches Expired - Lifetime US3430663A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DEB66782A DE1266778B (de) 1962-04-12 1962-04-12 Schlauchleitung fuer einen beweglichen Vakuumbehaelter zum Entgasen grosser Stahl-Metallmengen
DEB0066884 1962-04-18
DEB0066915 1962-04-19

Publications (1)

Publication Number Publication Date
US3430663A true US3430663A (en) 1969-03-04

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ID=27209182

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Application Number Title Priority Date Filing Date
US272186A Expired - Lifetime US3430663A (en) 1962-04-12 1963-04-09 Hose line for sucking off hot gases,particularly in the vacuum degassing of large metal and steel batches

Country Status (7)

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US (1) US3430663A (US20100012521A1-20100121-C00001.png)
AT (1) AT258332B (US20100012521A1-20100121-C00001.png)
BE (1) BE630769A (US20100012521A1-20100121-C00001.png)
CH (1) CH425371A (US20100012521A1-20100121-C00001.png)
GB (1) GB1043403A (US20100012521A1-20100121-C00001.png)
NL (1) NL291385A (US20100012521A1-20100121-C00001.png)
SE (1) SE310097B (US20100012521A1-20100121-C00001.png)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4106528A (en) * 1973-12-19 1978-08-15 Nikolaus Laing Tube for fluid substances under pressure
US4161231A (en) * 1973-10-31 1979-07-17 Rolls-Royce Limited Metal cavitated sandwich structures
US4974638A (en) * 1987-10-21 1990-12-04 Societe Nationale D'etude De Construction De Moteurs D'aviation "S.N.E.C.M.A." Transition pipe for a jet pipe assembly of a turbojet engine
CN109373068A (zh) * 2018-11-14 2019-02-22 湖州师范学院 一种囊式水量调节装置用使用方便的多选一通切换装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8522345D0 (en) * 1985-09-09 1985-10-16 Atomic Energy Authority Uk Composite tube manufacture
GB2478513A (en) * 2009-12-16 2011-09-14 Eaton Fluid Power Gmbh An expansion joint having relatively movable inner tubes and a flexible outer sleeve
CN113389954B (zh) * 2021-08-18 2021-10-29 江苏钜水建设工程有限公司 一种带有一体式连接结构的钢管

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US132006A (en) * 1872-10-08 Improvement w wagon-jacks
US376401A (en) * 1888-01-10 benjamin
US534473A (en) * 1895-02-19 Conduit for steam or hot water
US735449A (en) * 1903-02-24 1903-08-04 Otto Berger Pipe.
FR371456A (fr) * 1906-11-05 1907-03-08 Albert John Morphett Chapple Raccord de tuyaux
GB109774A (en) * 1917-07-11 1917-09-27 Simon Ltd Henry Improvements in the Construction of Flexible Pipes and Spouts used for the Transport of Grain and Granular Materials.
US1980466A (en) * 1932-02-23 1934-11-13 Jose M Angeja Hose connection
US1992485A (en) * 1933-08-21 1935-02-26 Ernest Soper Pipe coupling
US2079598A (en) * 1933-01-19 1937-05-11 Metal Hose & Tubing Co Inc Gasoline hose
US2778609A (en) * 1954-12-10 1957-01-22 Devilbiss Co Composite hose with temperature control
US2823703A (en) * 1955-07-26 1958-02-18 Jr Otto Nusser Flexible pipe

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US132006A (en) * 1872-10-08 Improvement w wagon-jacks
US376401A (en) * 1888-01-10 benjamin
US534473A (en) * 1895-02-19 Conduit for steam or hot water
US735449A (en) * 1903-02-24 1903-08-04 Otto Berger Pipe.
FR371456A (fr) * 1906-11-05 1907-03-08 Albert John Morphett Chapple Raccord de tuyaux
GB109774A (en) * 1917-07-11 1917-09-27 Simon Ltd Henry Improvements in the Construction of Flexible Pipes and Spouts used for the Transport of Grain and Granular Materials.
US1980466A (en) * 1932-02-23 1934-11-13 Jose M Angeja Hose connection
US2079598A (en) * 1933-01-19 1937-05-11 Metal Hose & Tubing Co Inc Gasoline hose
US1992485A (en) * 1933-08-21 1935-02-26 Ernest Soper Pipe coupling
US2778609A (en) * 1954-12-10 1957-01-22 Devilbiss Co Composite hose with temperature control
US2823703A (en) * 1955-07-26 1958-02-18 Jr Otto Nusser Flexible pipe

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4161231A (en) * 1973-10-31 1979-07-17 Rolls-Royce Limited Metal cavitated sandwich structures
US4106528A (en) * 1973-12-19 1978-08-15 Nikolaus Laing Tube for fluid substances under pressure
US4974638A (en) * 1987-10-21 1990-12-04 Societe Nationale D'etude De Construction De Moteurs D'aviation "S.N.E.C.M.A." Transition pipe for a jet pipe assembly of a turbojet engine
CN109373068A (zh) * 2018-11-14 2019-02-22 湖州师范学院 一种囊式水量调节装置用使用方便的多选一通切换装置
CN109373068B (zh) * 2018-11-14 2020-11-10 湖州师范学院 一种囊式水量调节装置用使用方便的多选一通切换装置

Also Published As

Publication number Publication date
BE630769A (US20100012521A1-20100121-C00001.png)
NL291385A (US20100012521A1-20100121-C00001.png)
SE310097B (US20100012521A1-20100121-C00001.png) 1969-04-14
AT258332B (de) 1967-11-27
GB1043403A (en) 1966-09-21
CH425371A (de) 1966-11-30

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