EP0240575B1 - L-förmige Hubschaufel für Rohrkühler - Google Patents

L-förmige Hubschaufel für Rohrkühler Download PDF

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Publication number
EP0240575B1
EP0240575B1 EP86103643A EP86103643A EP0240575B1 EP 0240575 B1 EP0240575 B1 EP 0240575B1 EP 86103643 A EP86103643 A EP 86103643A EP 86103643 A EP86103643 A EP 86103643A EP 0240575 B1 EP0240575 B1 EP 0240575B1
Authority
EP
European Patent Office
Prior art keywords
lifting blade
section
receiving trough
fastening section
accordance
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
Application number
EP86103643A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0240575A1 (de
Inventor
Jochen Patterson
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.)
Giesserei Kohlscheid GmbH
Original Assignee
Giesserei Kohlscheid GmbH
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
Application filed by Giesserei Kohlscheid GmbH filed Critical Giesserei Kohlscheid GmbH
Priority to EP86103643A priority Critical patent/EP0240575B1/de
Priority to AT86103643T priority patent/ATE46762T1/de
Priority to DE8686103643T priority patent/DE3665928D1/de
Priority to DK167086A priority patent/DK167086A/da
Priority to ES1986294242U priority patent/ES294242Y/es
Priority to FI862104A priority patent/FI82308C/sv
Publication of EP0240575A1 publication Critical patent/EP0240575A1/de
Application granted granted Critical
Publication of EP0240575B1 publication Critical patent/EP0240575B1/de
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/14—Rotary-drum furnaces, i.e. horizontal or slightly inclined with means for agitating or moving the charge
    • F27B7/16—Rotary-drum furnaces, i.e. horizontal or slightly inclined with means for agitating or moving the charge the means being fixed relatively to the drum, e.g. composite means
    • F27B7/161—Rotary-drum furnaces, i.e. horizontal or slightly inclined with means for agitating or moving the charge the means being fixed relatively to the drum, e.g. composite means the means comprising projections jutting out from the wall
    • F27B7/162—Rotary-drum furnaces, i.e. horizontal or slightly inclined with means for agitating or moving the charge the means being fixed relatively to the drum, e.g. composite means the means comprising projections jutting out from the wall the projections consisting of separate lifting elements, e.g. lifting shovels

Definitions

  • the invention relates to an L-shaped lifting vane for pipe coolers, in particular those for crushing and cooling cement clinker, in which one leg forms a fastening section provided with at least one screw opening and the other leg forms a driver section which has a receiving trough delimited by a curved bottom wall.
  • Such lifting blades are fixed to the jacket of a tube cooler directly or with brackets interposed.
  • Lifting blades of this type have long been in a cooler rotating about a slightly inclined axis relative to the horizontal, z. B. satellite coolers in the cement industry. They serve to improve the heat transfer from the material to be cooled to a flow of cooling air, since during the slow rotary movement they lift the hot material that passes through and let it flow through the air jet in the form of a more or less dense veil over the entire cooler diameter.
  • the cooling air conducted in counterflow to the material to be cooled preferably flows through the path with the least resistance. If the veil of the material to be cooled did not cover the entire cross section of the cooler, the cooling air would thus predominantly flow through the areas free of the material to be cooled. It would then lose its cooling effect accordingly, and the cooling efficiency would be reduced. Therefore, the known lifting blades are cup-shaped in such a way that the material to be cooled is more or less evenly emitted when the cooler rotates in the various successive angular positions during the rotary movement of the cooler.
  • a major disadvantage of these known cup-shaped lifting blades is their relatively short service life. In addition to their thermal and chemical loads, these lifting blades are also extremely mechanically stressed. Each time the cooler rotates, the lifting vanes are strongly heated during the scooping process, i.e. when the material to be cooled is picked up, and then cooled in the cooling air flow. This can result in a temperature difference on the blades of up to 500 ° C. Since there are usually more or less large chunks in the material to be cooled, which are also lifted up and thrown off, the front ends of the blades are very quickly destroyed and rolled inwards. These blades can then no longer properly perform the task intended for them in the cooler.
  • the invention is based on the object of providing a lifting vane of the type mentioned at the outset which does not have the abovementioned disadvantages and is distinguished by long service lives with good cooling action.
  • This object is achieved according to the invention in a lifting vane of the type mentioned at the outset in that the two end regions of the receiving trough of the leg forming the driver section lie on a reference plane which forms an angle ⁇ of 93 ° to 105 ° with the other leg (fastening section) such that Receiving trough in its longitudinal center from the reference plane is 2.5 to 5 cm deep and has its deepest point here, and that the length of the driver section measured normal to the fastening section is 16 to 24 cm.
  • the lifting blade according to the invention is designed in such a way that its bearing surface is large relative to the amount of material to be cooled that is carried along. This means that there is a high heat transfer between the material to be cooled and the lifting blade. Due to its shape, which works like cooling fins, it is quickly and sustainably cooled by the cooling air flow.
  • the material volume of the lifting blade itself is relatively small and consequently stores less heat than previously known bucket blades and also dissipates it to the cooler jacket to a lesser extent.
  • the cross section of the cooler is divided into a section in which the material to be cooled falls essentially in a veil shape, and a further section through which the cooling air is guided, the amount of particles entrained by the cooling air flow is significantly reduced.
  • the lifting blade according to the invention is designed in such a way that its basic orientation opposes the falling angle of larger pieces of material falling down like a sword, while offering a small impact area for these pieces. Falling larger chunks hit the front edge of the lifting blade, from where the impact energy is transferred directly to the fastening section. This largely avoids wear and damage to the lifting vane, and it also ensures good smashing of the larger chunks to be cooled. If the lumps hit the lifting vane from the side, the lumps are discharged, reducing the impact energy.
  • the lifting blade according to the invention can be designed so that the angle a is 97 ° to 100 ° . With an inclination in the specified range, particularly favorable results can be achieved according to the current tests.
  • the lifting blade according to the invention can also be designed such that the from the reference plane measured maximum depth of the receiving trough is 2.5 to 3 cm.
  • the lifting blade according to the invention can also be designed so that the length of the driver section is 16 to 18 cm.
  • the lifting blade according to the invention can also be designed such that the driver section has a reinforcing bead on its edge facing away from the fastening section. In this way, an additional reinforcement of the lifting vane is brought about in the area in which rough chunks must be expected to hit.
  • the lifting blade according to the invention can also be designed such that the receiving trough is divided by at least one wall connecting its two end regions. This promotes the distribution of the material across the width of the lifting bucket.
  • the lifting vane according to the invention can be designed such that at least one stiffening rib is provided between the bottom wall and the fastening section. This stiffening rib increases the stability of the lifting blade considerably.
  • the lifting vane according to the invention shown in FIGS. 1-5 is essentially L-shaped in its side view (FIGS. 3 to 5).
  • One leg is formed by a plate-shaped fastening section 1, which is provided with two outwardly projecting lugs 2 .
  • a screw opening 3 in the area of each attachment 2, into each of which a screw (not shown) for fixing the lifting blade to a jacket 4 of a tube cooler can be inserted.
  • Another leg of the L-shaped lifting vane in the side view is formed by a driver section 5 which has a bottom wall 6 which delimits a receiving trough 7.
  • the receiving trough 7 is divided by two side walls 8 and a partition 9.
  • the side walls 8 and the partition 9 run essentially parallel to one another from one end region of the driver section to the other.
  • the bottom wall 6 is provided with a reinforcing bead 13 at its edge which is furthest away from the fastening section 1.
  • Two stiffening ribs 14 running parallel to one another additionally support the bottom wall 6 on the fastening section 1.
  • the edges delimiting the receiving trough 7 in the middle end regions lie on a reference plane B, which forms an angle a of 95 ° to 100 ° with respect to the fastening section 1.
  • the maximum depth of the receiving trough 7, measured from the reference plane B, is 2.5 to 3.0 cm.
  • the length L of the driver section 5 measured normal to the fastening section is 16 to 18 cm. This described length L decreases in the case of the described lifting bucket on its sides, since the reinforcing bead 13 is slightly bent back towards its ends.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Details (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Pyrane Compounds (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Containers, Films, And Cooling For Superconductive Devices (AREA)
  • Silicon Compounds (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
  • Table Equipment (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
EP86103643A 1986-03-18 1986-03-18 L-förmige Hubschaufel für Rohrkühler Expired EP0240575B1 (de)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP86103643A EP0240575B1 (de) 1986-03-18 1986-03-18 L-förmige Hubschaufel für Rohrkühler
AT86103643T ATE46762T1 (de) 1986-03-18 1986-03-18 L-foermige hubschaufel fuer rohrkuehler.
DE8686103643T DE3665928D1 (en) 1986-03-18 1986-03-18 L-shaped lifting blade for tube coolers
DK167086A DK167086A (da) 1986-03-18 1986-04-11 L-formet loefteskovl til roerkoelere
ES1986294242U ES294242Y (es) 1986-03-18 1986-05-05 Cuchara elevadora en forma de l para enfriadores tubulares
FI862104A FI82308C (sv) 1986-03-18 1986-05-20 L-formig lyftskovel för rörkylare

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP86103643A EP0240575B1 (de) 1986-03-18 1986-03-18 L-förmige Hubschaufel für Rohrkühler

Publications (2)

Publication Number Publication Date
EP0240575A1 EP0240575A1 (de) 1987-10-14
EP0240575B1 true EP0240575B1 (de) 1989-09-27

Family

ID=8194974

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86103643A Expired EP0240575B1 (de) 1986-03-18 1986-03-18 L-förmige Hubschaufel für Rohrkühler

Country Status (6)

Country Link
EP (1) EP0240575B1 (sv)
AT (1) ATE46762T1 (sv)
DE (1) DE3665928D1 (sv)
DK (1) DK167086A (sv)
ES (1) ES294242Y (sv)
FI (1) FI82308C (sv)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1501566A (en) * 1922-07-08 1924-07-15 Huron Ind Inc Lining for cement-drying kilns
DE2255069B2 (de) * 1972-11-10 1977-03-03 Polysius Ag, 4723 Neubeckum Trommel zur thermischen behandlung von schleissendem gut
GB1423300A (en) * 1973-04-09 1976-02-04 Polysius Ag Rotary drum for the heat treatment of strongly erosive material
DE2631397A1 (de) * 1976-07-13 1978-01-19 Polysius Ag Planetenkuehler

Also Published As

Publication number Publication date
DK167086A (da) 1987-09-19
ES294242Y (es) 1987-06-16
FI862104A0 (fi) 1986-05-20
FI82308B (fi) 1990-10-31
ES294242U (es) 1986-10-16
DE3665928D1 (en) 1989-11-02
DK167086D0 (da) 1986-04-11
FI82308C (sv) 1991-02-11
EP0240575A1 (de) 1987-10-14
FI862104A (fi) 1987-09-19
ATE46762T1 (de) 1989-10-15

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