EP0101224A2 - Buse pour la pulvérisation d'eau - Google Patents

Buse pour la pulvérisation d'eau Download PDF

Info

Publication number
EP0101224A2
EP0101224A2 EP83304367A EP83304367A EP0101224A2 EP 0101224 A2 EP0101224 A2 EP 0101224A2 EP 83304367 A EP83304367 A EP 83304367A EP 83304367 A EP83304367 A EP 83304367A EP 0101224 A2 EP0101224 A2 EP 0101224A2
Authority
EP
European Patent Office
Prior art keywords
water
nozzle assembly
jet nozzle
apertures
header
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.)
Granted
Application number
EP83304367A
Other languages
German (de)
English (en)
Other versions
EP0101224B1 (fr
EP0101224A3 (en
Inventor
Sadao Ebata
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.)
JFE Steel Corp
Original Assignee
Kawasaki Steel Corp
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 JP13796882A external-priority patent/JPS5929054A/ja
Priority claimed from JP21918982A external-priority patent/JPS6047010B2/ja
Application filed by Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Publication of EP0101224A2 publication Critical patent/EP0101224A2/fr
Publication of EP0101224A3 publication Critical patent/EP0101224A3/en
Application granted granted Critical
Publication of EP0101224B1 publication Critical patent/EP0101224B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/26—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets
    • B05B1/262—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets with fixed deflectors
    • B05B1/267—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets with fixed deflectors the liquid or other fluent material being deflected in determined directions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0233—Spray nozzles, Nozzle headers; Spray systems

Definitions

  • This invention relates to a water jet nozzle assembly, and more particularly to a nozzle assembly for jetting cooling water against undersides of materials such as steel plates and the like for cooling the materials.
  • the cooling water jetted from nozzles onto upper surfaces of steel plates will stay thereon for required period of time, so that the overall upper surfaces are cooled in a substantially uniform and effective manner.
  • the cooling effect occurs only at locations of the surfaces the jetted water initially impinges. After the water has impinged against the surfaces, it immediately drops away from the surfaces and thereafter it does not serve to cool the surfaces. It is therefore difficult to cool the undersides of the plates uniformly and effectively.
  • a water jet nozzle assembly for cooling undersides of plate-like materials comprises an elongated header in the form of a hollow cylinder having a substantially horizontal axis and being supplied with cooling water under pressure, guide means for guiding water flow jetted in substantially horizontal directions from said header to turn said flow upward toward said material to be cooled, and jetting means for substantially horizontally jetting said water flow from said header.
  • the hollow cylinder is formed in its both sides at a mid level with a plurality of apertures in substantially horizontal alignment with each other with substantially equal intervals to form the jetting means
  • the guide means comprises two elongated curved plates having a substantially quadrantal cross-section which are secured to the cylinder with one longitudinal sides of the plates adjacent to lower edges of the apertures formed in the cylinder and with the other longitudinal sides of the plates upward extending.
  • the hollow cylinder comprises a U-shaped trough
  • the guide means comprises an elongated curved plate having a substantially semicircular cross-section arranged on the U-shaped trough so as to close an upper open side of the trough, with both longitudinal sides of the curved plate upward extending
  • the jetting means comprises a plurality of apertures formed in a bottom of the curved plate with substantially equal intervals and converter plates arranged above and spaced apart from the respective apertures with spacers to turn the water flows jetted from said respective apertures of the curved plate into substantially horizontal directions.
  • a water jet nozzle assembly 1 mainly comprises a header 2 and guide plates 3.
  • the header 2 is in the form of an elongated pipe having a substantially horizontal axis and having an inner cross-sectional area required to jet supply water substantially uniformly over its length of the pipe.
  • the header 2 is provided at its one end at the right end as viewed in Figs. 1 and 2 with a flange 2a adapted to be connected to a conduit (not shown) for supplying the water under pressure and is closed at the other end by a closure disc 2b.
  • the header 2 is further formed in its sidewalls with a plurality of apertures 2c in alignment with each other and in parallel with the axis of the header 2.
  • the apertures 2c have diameters of, for example, in the order of 3-10 mm and are arranged with a predetermined interval.
  • the jetted water from the apertures 2c is turned upward by means of guide plates 3 later described to form upward jet water flow in the form of films or laminates.
  • the apertures are shown circular, they may be square, rectangular and the like.
  • directions of jetted water from the apertures are horizontal in this embodiment, they may be oblique relative to the horizontal with some angles.
  • the guide plates 3 are in the form of elongated plates curved in section as arcs of quadrants, as if they were ones obtained by dividing a circular pipe along its generators into four equal parts.
  • the guide plates 3 are secured to the outer surfaces of the sidewalls of the header 2 with one longitudinal sides of the guide plates adjacent to lower edges of the apertures 2c and with the other longitudinal sides of the plates upward extending.
  • the guide plates have curved smooth upper surfaces and are secured to the header 2 such that tangential lines to the curved upper surfaces of the guide plates at the lower edges of the apertures are aligned with directions of the jetted water from the apertures 2c.
  • the guide plates may be secured to the header as by welding.
  • the guide plates 3 serve to turn upward the bar-like water flows jetted from the apertures 2c and to widen the water flows into film-like water flows by gathering together the respective water flows jetted from the apertures.
  • the water flows W 1 , W 2 and W 3 jetted from the apertures 2c of the header 2 and guided by the guide plates 3 are cooling a material 4 trained on table rollers 5.
  • the water supplied into the header 2 is jetted from the apertures 2c in horizontal directions and guided and turned along the curved upper surfaces of the guide plates 3 upward toward the material 4 to be cooled.
  • the flow W 1 When the jet water flow W 1 collides against the lower surface of the material, the flow W 1 is divided into two halves W 2 and W 3 , one of which W 2 flows along the lower surface away from the water jet nozzle 1 to cool the material 4 and then falls and the remaining half flow W 3 flows along the lower surface in a direction opposite to the half flow W 2 to cool the material 4 and then collides against the water flow W' 3 coming from the opposite direction so that the water flows W 3 and W' 3 unite with each other and fall onto substantial center of the water jet nozzle assembly 1 to be recovered.
  • the amount of the supplied water or water jetted from the apertures 2c is substantially equal to the amount of the water flow W 2 to be consumed or wasted after used for cooling. Accordingly, the amount of the recovered water W 3 to be reused is also substantially equal to the amount of the water jetted from the apertures 2c.
  • the water flow cooling a material 4 is twice the supplied water flow.
  • cooling rate of a material increases as jetted cooling water increases. Accordingly, the water jet nozzle assembly constructed as above described according to the invention can cool material very effectively and rapidly in comparison with nozzles of the prior art, because of twice amount of jetted water with the same amount of supply water.
  • cooling rates of steel plates from temperature 800°C to 500°C with flow rate 500 l/min-m 2 of the cooling water are approximately 1.5 times those of conventional spray nozzles under the same condition.
  • guide plates 3 may be in section more than arcs of quadrants, so that the upper edges of the guide plates are directed toward each other as shown in phantom lines in Fig. 3.
  • the jet water flows W 1 are also inclined toward each other, resulting in (water flow W 3 ) > (water flow W 2 ).
  • the reused water ratio is more than one, so that more effective and rapid cooling can be carried out.
  • the header 2 and the two guide plates 3 are arranged side by side in a horizontal line, so that the two jetted waters W 1 directing upward along the inner surfaces of the guide plates 3 are properly spaced apart from each other.
  • the water jet nozzle assembly according to the embodiment is therefore the most suitable for cooling materials as in slabbing mill lines whose table rollers are sufficiently spaced without any trouble for locating such water jet nozzle assemblies therebetween.
  • the header 2 having the relatively large diameter so that the overall width L of the nozzle assembly is substantially large which makes it impossible to use for cooling materials as in strip mill lines whose table rollers are not sufficiently spaced.
  • a water jet nozzle assembly 11 mainly comprises a header 15 in the form of a U-shaped trough, a guide plate 12 and converters 13.
  • the guide plate 12 has a substantially U-shaped cross-section and is substantially horizontally arranged on the header 15 integrally therewith to close an upper open side thereof.
  • the guide plate 12 serves to turn water flows jetted at the bottom of the plate upward in a smooth manner. Its cross-sectional shape may be semicircular, deep U-shaped, or shallow or widened U-shaped.
  • the guide plate is formed in its bottom with a plurality of apertures 12a communicating with an interior of the header 15 for jetting cooling water supplied into the header 15.
  • the apertures 12a are preferably circular having diameters of, for example, 3-10 mm with a predetermined interval. However, the apertures may be square or rectangular or longitudinally elongated slits or the like.
  • the converters 13 comprise spacers 14 integrally formed therewith which serve to arrange the converters 13 above the respective apertures 12a of the guide plate by welding to form clearances G between the guide plate and the converters.
  • the converters 13 serve to turn the water flows from the apertures 12a into substantially horizontal directions.
  • the header 15 uniformly distribute the supply water and jet it from the apertures 12a.
  • the header is shown box-shaped in cross-section directly welded to the underside of the guide plate.
  • the shape of the header 15 is not limited to that shown in the drawing.
  • the water flows W 1 , W 2 and W 3 jetted from the nozzle are cooling a material 16 trained on table rollers 17.
  • the water supplied into the header 15 is upward guided through the apertures 12a and divided at the converters 13 into horizontal flows.
  • the horizontal flows turn their directions along the inner surfaces of the guide plate and impinge against the underside of the material 16.
  • the water flows W 1 , W 2 , W 3 and W' 3 flow in substantially the same manner as in the first embodiment with exception of the united water flows W 3 and W' 3 fall onto the converters and flow into separate directions on the converters and onto the guide plate 12 where they unite new water jets from the apertures 12a.
  • the water flow cooling a material 16 is twice the supplied water flow in the same manner as in the first embodiment. Accordingly, the water jet nozzle of this embodiment can cool material no less effectively than the first embodiment. In an experiment, it has been found that cooling rate of the water jet nozzle of the second embodiment is also about 1.5 times those of the conventional spray nozzles.
  • the guide plate 12 may be circular in section more than semicircular so that upper edges of the guide plate are directed toward each other as shown in phantom lines in Fig. 7 to inwardly incline the water flow W 1 toward each other, thereby increasing the reused water flows to carry out the more effective cooling as in the first embodiment.
  • FIG. 9 illustrates a third embodiment of the invention in section which is a slight modification of the second embodiment.
  • a water jet nozzle 31 includes modified converters 33.
  • Each the converter 33 comprises a circular disc and a spacer 34 in the form of a hollow cylinder closed at its upper end by the circular disc and formed with through-holes 34b perpendicular to an axial hole 34a.
  • the spacer or hollow cylinders 34 are inserted and fixed in a plurality of apertures formed in the bottom of the guide plate along its length with a predetermined interval such that the through-holes 34b extend in traverse directions of the length of the guide plate and lower edges of the through-holes 34b are at upper surface of the bottom of the guide plate.
  • the water jet nozzle assembly according to the invention is capable of effectively cooling undersides of materials and applicable to cooling zones having not only wider table pitches as in slab mill lines but also narrower table pitches as in strip mill lines.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nozzles (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
EP19830304367 1982-08-10 1983-07-28 Buse pour la pulvérisation d'eau Expired EP0101224B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP137968/82 1982-08-10
JP13796882A JPS5929054A (ja) 1982-08-10 1982-08-10 水噴射ノズル
JP219189/82 1982-12-16
JP21918982A JPS6047010B2 (ja) 1982-12-16 1982-12-16 水噴射ノズル

Publications (3)

Publication Number Publication Date
EP0101224A2 true EP0101224A2 (fr) 1984-02-22
EP0101224A3 EP0101224A3 (en) 1985-05-22
EP0101224B1 EP0101224B1 (fr) 1988-02-10

Family

ID=26471127

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830304367 Expired EP0101224B1 (fr) 1982-08-10 1983-07-28 Buse pour la pulvérisation d'eau

Country Status (4)

Country Link
EP (1) EP0101224B1 (fr)
AU (1) AU546810B2 (fr)
DE (1) DE3375647D1 (fr)
FI (1) FI73001C (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2910653A1 (fr) * 2014-02-22 2015-08-26 Josef Stutz Procédé et dispositif de refroidissement de bandes métalliques

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1541048A (en) * 1924-01-25 1925-06-09 Haueisen Edward Lawn sprinkler
US1867878A (en) * 1930-10-13 1932-07-19 Coviello Anthony Lawn sprinkler
DE1144047B (de) * 1959-08-03 1963-02-21 Mannesmann Ag Beregnungsanlage
FR2005744A1 (fr) * 1968-04-08 1969-12-19 Kaiser Aluminium Chem Corp
FR2323452A3 (fr) * 1974-01-10 1977-04-08 Fives Cail Babcock Dispositif pour la pulverisation de liquides

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1541048A (en) * 1924-01-25 1925-06-09 Haueisen Edward Lawn sprinkler
US1867878A (en) * 1930-10-13 1932-07-19 Coviello Anthony Lawn sprinkler
DE1144047B (de) * 1959-08-03 1963-02-21 Mannesmann Ag Beregnungsanlage
FR2005744A1 (fr) * 1968-04-08 1969-12-19 Kaiser Aluminium Chem Corp
FR2323452A3 (fr) * 1974-01-10 1977-04-08 Fives Cail Babcock Dispositif pour la pulverisation de liquides

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2910653A1 (fr) * 2014-02-22 2015-08-26 Josef Stutz Procédé et dispositif de refroidissement de bandes métalliques

Also Published As

Publication number Publication date
AU1747983A (en) 1984-02-16
FI832833A (fi) 1984-02-11
DE3375647D1 (en) 1988-03-17
FI73001C (fi) 1987-08-10
FI832833A0 (fi) 1983-08-08
EP0101224B1 (fr) 1988-02-10
EP0101224A3 (en) 1985-05-22
FI73001B (fi) 1987-04-30
AU546810B2 (en) 1985-09-19

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