Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F27—FURNACES; KILNS; OVENS; RETORTS
  • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
  • F27D1/00—Casings; Linings; Walls; Roofs
  • F27D1/18—Door frames; Doors, lids or removable covers
  • F27D1/1858—Doors
  • F27D1/1866—Door-frames
• • 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
  • F27B17/00—Furnaces of a kind not covered by any of groups F27B1/00 - F27B15/00
  • F27B17/0016—Chamber type furnaces
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F27—FURNACES; KILNS; OVENS; RETORTS
  • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
  • F27D1/00—Casings; Linings; Walls; Roofs
  • F27D1/0003—Linings or walls
  • F27D1/0006—Linings or walls formed from bricks or layers with a particular composition or specific characteristics
  • F27D1/0009—Comprising ceramic fibre elements

Definitions

• the present invention relates to a furnace lining for a furnace chamber which can be closed by an oven door, wherein the furnace door has a door lining with at least one material blank made of a carbon material and is provided with a lining frame which holds the door lining on a door leaf and against a lining edge of a furnace door Furnace chamber lining, which limits a furnace chamber opening circumferentially, is applied.
• Furnace liners of the type mentioned above are used in particular for furnaces in which a heat treatment of workpieces, for example, for curing the surfaces of steel-made workpieces or for structural transformation of the material used for the workpieces, takes place.
• the main purpose of the furnace lining is to thermally insulate the furnace wall, which is made regularly of steel, from the furnace atmosphere. Due to the dynamic temperature load imposed on the furnace lining due to the frequent heating and cooling processes, the furnace lining undergoes a thermally induced aging, which, depending on the type of stress, requires replacement of the furnace lining after a defined number of operating cycles of the furnace. The replacement of the furnace lining not only results in downtime of the furnace concerned, but also results in considerable costs for refitting the furnace with a furnace lining.
• the oven lining of the furnace door has proven to be particularly susceptible to a thermal stress caused by the changing temperature load, since the material blanks, which usually form a carbon fiber felt and form the essential part of the door lining, are here exposed with their cut surfaces exposed. In comparison to the other surface of the door lining, which is regularly protected by an additionally applied graphite foil, these cut surfaces are exposed to the temperature load essentially unprotected, so that in particular the risk of erosion of the insulation material and thus optionally a reduced insulating effect is given. In addition, there is the risk of mechanical damage to the exposed cut surfaces in contact with workpieces when they are introduced for heat treatment in the oven.
• the furnace lining according to the invention has the features of claim 1.
• the furnace lining according to the invention is provided with a lining frame for the door lining, which as a frame profile of a CFC material is formed such that a first profile limb is aligned parallel to a blank surface of the material blank, and a second profile limb subsequently formed on the first profile limb covers a cut surface of the material blank. Due to the inventive design of the furnace lining of the lining frame not only fulfills the function of fixing the door lining on the door leaf, but also forms by means of the second profile leg shielding the otherwise exposed unprotected cut surface with respect to the furnace atmosphere.
• the cut surface area which is particularly susceptible to the temperature load is effectively protected, so that the service life of the door lining or the operating time of the furnace provided with such a door lining can be substantially increased between two maintenance cycles.
• the first profile limb and the second profile limb form an L-shaped profile cross-section of the lining frame, so that the frame profile not only has two profile limbs with different functions, but also has an increased stiffness relative to one another due to the relative arrangement of the profile limbs , so that deformation of the frame profile due to the temperature stress can be largely excluded.
• the lining frame subsequently to the second profile limb has a third profile limb which extends parallel to and opposite to the first profile limb, such that the profile cross section is formed in a staircase manner with a profile shoulder, it is possible to effect an immediate attachment of the lining frame to the door leaf without any effect Provide on the first or second profile leg, so that the first and the second profile legs are unaffected in their function of a fastener used for fastening the third profile leg on the door leaf fastener.
• the lining frame then has a fourth profile limb adjacent to the third profile limb, which leg extends parallel and opposite to the second profile limb from the third profile limb.
• Such a trained lining frame allows by means of the fourth profile leg B efest Trent the lining frame on a door leaf frame of the oven door, without affecting the first and second profile leg, such that the fourth profile leg to form a particularly rigid structural bond between the door leaf and the door lining parallel arranged to the door leaf frame and connected with di esem.
• the profile leg not only serves for attachment to the door leaf, but also takes over a shielding function analogously to the second profile leg.
• a door lining which is particularly resistant to aging and, moreover, which is particularly effectively constructed from ready-made material blanks has a filling with two material blanks of different sizes arranged on top of each other, such that the filling has a step-shaped, circumferential filling edge which is covered by the Auskl eidungsrahmen is, in such a way that the first and the third profile limb are in each case arranged on a blank surface, and the second and the fourth profile limb in each case cover an intersection of the material blanks.
• Fig. 2 is a plan view of the inside of the furnace door shown in Fig. 1, provided with a door lining.
• 1 shows in a sectional view a door region of a furnace 10 with a furnace chamber 11, which is provided with an oven door 12 for closing a furnace chamber opening 13.
• the oven door 12 has a door leaf 14, which, like a ICammerwand 1 5 of the furnace chamber 1 1 in the present embodiment consists of steel.
• a furnace lining 1 7 is provided which comprises a chamber lining 1 8 of the furnace chamber 1 1 and a door lining 19 of the furnace door 12.
• the oven chamber 1 1 has material blanks 20 arranged against the chamber wall 15 from a fiber felt formed from carbon fibers, wherein the material blanks 20 have a blank surface 21 which is covered with a graphite foil 22.
• One of the furnace door 12 facing lining edges 23 of the chamber liner 1 8, which limits the furnace chamber opening 1 3, has an edge web 24 which is formed in the present case of a U-shaped CFC material.
• the door leaf 14 of the aligned parallel to the plane of the drawing, not shown pivotable pivot axis furnace door 12 is cup-shaped, with a formed by an edge web of the door leaf 1 4 door leaf frame 25th
• the door lining 19 has a lining frame 26 arranged on the door leaf 14, which is provided with a filling 27 of two material blanks 28, 29 of different sizes arranged on top of one another.
• the material blanks 28, 29 are thus arranged one above the other. net, that the filling 27 has a staircase-shaped, circumferential filling edge 30, which is covered by the lining frame 26.
• the lining frame 26 has a profile cross-section 3 1, which is composed of two L-shaped profile sections 32, 33, with a first profile leg 34 and a second profile leg 35 of the first profile section 32 and a third profile leg 36 and a fourth profile leg 37 of the second profile section 33.
• the profile legs 34 to 37 are oriented to each other so that the first profile leg 34 and the third profile leg 36 parallel to each other and each on a blank surface 3 8, 39 of the material blanks 28, 29 are arranged, and the second profile leg 35 and In each case, the fourth profile limb 37 covers a cut surface 40, 41 of the material blanks 28, 29.
• the second profile leg 35 and the third profile leg 36 which extends parallel and opposite to the first profile leg 34, together form a profile shoulder 42 in the transition from the cut surface 40 of the first material blank 28 to the blank surface 39 of the second material blank 29.
• the blank surface 38 of the upper material blank 28 is covered with a graphite foil 43 which extends between the blank surface 38 and the first profile limb 34.
• the fourth profile leg 37 extends substantially parallel to the door leaf frame 25, so that attachment of the lining frame 26 to the door leaf 14 can take place by means of the fourth profile leg 37, without any penetration of the material blanks forming the filling 27 28, 29 would be necessary.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Ceramic Engineering (AREA)
• Furnace Housings, Linings, Walls, And Ceilings (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=52875112

Family Applications (1)

Country Status (4)

Families Citing this family (2)

Citations (1)

Family Cites Families (4)

• 2014
  • 2014-04-29 DE DE102014208108.4A patent/DE102014208108B4/de active Active
• 2015
  • 2015-03-25 PL PL15716444T patent/PL3137833T3/pl unknown
  • 2015-03-25 WO PCT/EP2015/056460 patent/WO2015165656A1/de not_active Ceased
  • 2015-03-25 EP EP15716444.3A patent/EP3137833B1/de active Active

Patent Citations (1)

Also Published As

Similar Documents

Legal Events