DE2163202C3 - Beam for walking beam furnace with vertically and / or horizontally movable beams - Google Patents

Description

2. Beam for a walking beam furnace after annealing or charging material through the sliding contact spoke I, characterized by two pipes (36, tion between the good and the water-cooled 37) of the truss frame (32, 33). Bearer areas remain that have a low

3. Beams ^for a walking beam furnace according to the temperature as the rest of the surface have sphch 1 or 2, characterized in that the 20 This disadvantage can only be solved by a ratio of Fithwerkrahmen (32, 33) made of coolant diameter complex and thus expensive construction füi pipes (34, 35, 36, 37) at their ends avoid the support holding the annealing material by two adjacent, refractory (US Pat. No. 3,296,039).

lower walls (22) of the furnace are supported. For heat treatment of steel blocks, billets

4. Beams for a walking beam furnace according to Anpein, slabs and the like are still so-called Claim 1, 2 or 3, characterized in that walking beam furnace is known. These ovens show in dei Truss frames (32,33) in groups to form pairs, in any case several, arranged one behind the other ren of adjacent specialist zones in the transverse direction, e.g. B. a preheating zone and one on it iverkrahmen (32, 33) are assembled, subsequent heat-up zone through which the glow welche provided with jointly bent tubes (37) 30 and the load from the furnace inlet to the furnace are, the intermediate connections between the outlet is moved through. As a funding facility see the framework frame (32, 33) of a pair, for example, a system of moveable structures is used. chen bar, which the annealing material from fixed

5. Beam for a walking beam furnace after An beam lifts off by a certain amount 2 or 3 and 4, characterized in that 35 moved zontally forward and then back on the that the truss frame (32) settles at the ends on fixed beams, then the Carriages (41) are supported, the horizontally movable beams for preparing the next one end movable on the refractory, lower feed under the on the fixed beam Walls (22) arranged and withdrawn with inner channels overlying annealing material. There are are provided. 40 also known walking beam ovens in which

6. Beam for a walking beam furnace after the annealing or charging material through a first ipruch 4 and 5, characterized in that the system of movable beams initially by one Moveable carriage (41) is moved forward a common support-specific path, then by ment for the two truss frames (32) of a second beam system raised and closed pair forms. 45 borrowed again lowered onto the first beam system

7th beam for a walking beam furnace after arrival, after the latter is in its starting position «Pruch 5 and 6, characterized in that it has also been withdrawn.

Except for the bars on the feeding and just as in the way the bars move

Abführendc (12, 13) of the furnace half-timbered differ from these known walking beam furnace frame (32) which are mutually adjacent in 50 also in the construction of these beams. At some running lengthways through the furnace, known type of walking beam furnace (German Ausleeinen movable carriages (41), of which at least 1,302,852 and 1,583,353, U.S. Patent two terminals of different writing 1 739 250) become massive bodies with large neighbors Truss frame (32) is supported. used as a movable beam with a large cross-section,

8. Beam for a walking beam furnace according to An 55, which then at the same time forms the lower end of the heating zone 5, 6 or 7, characterized in that form NEN. As a support surface for the glow or be-everyone Carriages (41) through an opening (24) in the cargo are in these known ovens at horizontal, upper part of a lower intermediate, for example, on the walking beam and on non-moving ones Intermediate wall (22) of the furnace is arranged and the areas of the lower end of the heating zones Dimensions are such that a carriage (41) is provided with a 60 coolant-carrying tube. Hubbal cover for the opening (24) regardless of kenöfen of this type have the main disadvantage its location. that the annealing or charging material in particular

9. The beam for a walking beam furnace can only be insufficiently heated after it has been approached from below, Claim 8, characterized in that the Wa- Other known walking beam furnace (German disclosure (41) are arranged on rollers (43), which 65 reference documents 1807 562, 1904136, 1758 288 and in turn arranged within the opening (44) 1 935 656; U.S. Patent 3 554 505) see this, before a bar system in which the individual

Bars as a support surface for the goods to be heated

own an upper level pipe that then by vertical posts or frame part ^ at a distance from the lower end wall of the Heating zones is maintained. As far as movable Bars are the associated vertical ones Posts or frame parts with their lower end on a moved by a drive mechanism Platform attached. The horizontal pipes, the posts and the frame parts are made of cooling water flowed through. These known Hubbalkenöfcn or the bars used there have the Nachtcil that a variety of posts to accommodate the weight of the annealing or charging material or of frame parts is required at relatively short intervals and that due to the fixed connection the post or frame parts with the furnace or the moving platform and the installation than a?! ch removing the bars, for example for maintenance purposes, is much more difficult. Without the use of posts or frame parts only relatively short areas of the furnace can be bridged with the known beams.

The ones used in all known walking beam ovens Beams also have the disadvantage of high weight, especially for the movable ones Beams, which in the case of the walking beam of the first-mentioned type by the beams themselves, in the case of the walking beam furnaces of the second-mentioned type due to the platform supporting the post or frame parts is. This makes the production and installation of the bars just as expensive as the drive mechanism for these bars, which are in addition to the annealing or charging material Must move heavy beams.

The present invention is based on the task of installing and producing. BaI-ken for walking beam furnace to make it easier and cheaper as well as to allow easy removal and reinsertion of the beams for repair purposes.

To solve this problem, a lifting beam of the type mentioned is designed according to the invention in such a way that that a further coolant flow-through tube is arranged under the upper tube and at least one tube arranged therebetween is curved in the vertical plane formed by the tubes and connects the pipes via points of contact to form a framework frame.

The invention offers the advantage that with less material and weight for the beams With each of these beams, large furnace zones can be spanned without the need for additional support posts or support frame are required, while at the same time with the reduction in weight and the manufacturing costs of these bars and their installation and removal is significantly facilitated. the Advantages of the invention are particularly evident in the case of lifting and feed beams; The invention however, it also offers non-moving bars serving as slide rails, at least because of the savings significant advantages in terms of material and weight.

In one embodiment of the invention are between the upper horizontal tube and the Cut two curved tubes in front of the tube lying below. Does the oven have a floor or lower walls which, for example, have different heat zones determine to are the truss frames made of coolant-permeated pipes preferably on theirs Ends supported by two such, adjoining, refractory lower wound of the furnace. It is useful to have the half-timbered rooms in groups to combine in pairs of adjacent framework frames in the transverse direction of the furnace, using bent tubes, which are interconnections between the truss frames of each pair. The truss frames are supported at the ends on wagons, which are arranged horizontally to and fro on the refractory, lower walls and with internal channels are provided, which a coolant connection between the tubes of adjacent truss frames form. The movable carriage can provide a common support for the two truss frames of each pair. With the exception of the bars at the inlet and outlet ends of the furnace also share truss frames, which are mutually adjacent in the Run lengthways through the furnace, a movable carriage, which xjmit at least two Supports end points of adjacent truss frames.

Since the movable carriages serve as a support for the

»5 a! S feed beam serving truss frame is used each carriage is preferably horizontally reciprocable over an opening in the horizontal, upper part of a lower partition of the furnace, with the dimensions are made in such a way that a car has a cover for the opening regardless of its location forms. The trolleys can be arranged on rollers, which in turn are inside the opening are housed.

Details and special features of the present invention are given in connection with the figures explained in more detail on a lifting furnace or annealing furnace.

F i g. 1 is a schematic vertical longitudinal section by an annealing furnace with a beam according to the invention;

F i g. 2 is a partial horizontal section along line 2-2 of FIG. 1;

F i g. Figure 3 is a cross section taken on line 3-3 of Figure 3. 1;

Figure 4 is a cross-section on line 4-4 of FIG F i g. Figure 3 shows the adjacent ends of two feed bars;

F i g. 5 is a cross section through the discharge end of the furnace of FIG. 1 and shows the device

so for moving the feed beam;

F i g. Figure 6 is a cross section taken on line 7-7 of Figure 6. 3, showing the adjacent ends of two Walking beam;

F i g. 7 is a cross section through another embodiment according to the invention and shows the adjacent ends of two both longitudinally as well as ΐτ in the perpendicular direction of movable baiken, which are arranged on a lower wall; Figure 8 is a cross section taken along line 10-10 of FIG. 7.

In the F i g. 1 to 5 and 7 of the drawings is a walking beam furnace in various sectional views shown, which with an entry, d. H. Inlet end 12, and an outlet, i.e. discharge end 13 is provided. The furnace is divided into a plurality of vrw heating zones by a plurality of corresponding ones spaced upper and lower walls 21 and 22 that extend across the

Oven and extend over its entire width. That of floor burners 23, whose function does not work

lower walls extend from above, i.e. H. from the support system for the load

The bottom of the furnace is up, and the top walls are

extend downward from the top of the furnace. As shown in Fig. 6, the Hubbalkcn

A load to be heated 20 or s has the same general design of pipes as

Workpiece is in the longitudinal direction by the feed beam 32 with the exception that

Furnace from the infeed endc 20 to the outfeed - the ends of the upper tube 34 at each lifting bal-

Rungscnde 13 through a movable frame forward ken extend outward on the top and

moves upwards, which from a plurality of forwards then curves backwards downwards into

push bar in the form of a framework frame 32 io the support component, as more in detail below

and is described by Hubbalkcn in the form of a framework frame.

mens 33 is made, each of them from In the embodiments of the invention according to

water-cooled tubes is formed. the F i g. 1 to 6 the end bar is a single one

As shown in Figs. 1, 3, 4 and 6, while the remaining beams are held between each feed beam 32, an upper tube 34. 15 ends in pairs of interconnected. One same upper tube forms part of a fixed - Advancing beams 32 and alternating pairs of standing beams 33. The uppermost tubes 34 run from mutually connected walking beams 33 straight over their entire length and form a joint, as shown in FIG. 3 is shown. Thus there is ha-support for the load in the furnace. ben the feed beam 32 and lifting beam 33 from each of the two types of beam has a lower 20 alternating pairwise spacing across the width of the tube 35, an intermediate tube 36, an oven, ie in an interlocking form,
between lying pipe 37 and a third pipe 38 each pair of feed bars 32 of the movliauf. Each top tube 34 is provided with a plurality of racks that are movable for reciprocating longitudinally spaced support movement on each bottom wall 22, or rails 39 for supporting the furnace made in the 25 by a carriage or support section 41 give away warming loads, made of suitable refractory material, supported. As can be seen from FIGS. 3, 4 and 6. This from in the F i g. 3 and 4, each trolley support studs can be made of chrome-nickel bracing material 41 in its lower part with a tubular frame 42 which is provided on the upper side, which tubes are welded around the lower outer edges. All tubes are extended with that of the carriage and also across the width in spaced apart locations to form the center of the carriage. The individual tubes of a rigid, load-bearing system, referred to herein as each truss frame, are connected to the frame net as a truss frame, of great length and not only to provide a rigid support for the frame. The lowermost tube member 35 of each truss mcncndes connected, but also, in order to lead to the supply frame or beam, is generally V-shaped, 35 tion of water or some other cooling liquid making it lower in the middle than at each end to the tubes of the truss frame serve. What is. All pipes are fire-proof insulated. ser is the frame 42 by suitable connec-

The intermediate pipe 36 of each truss frame is supplied.

mens extends downward from one end from FIGS. 3 and 4 it can be seen that each

to the pipe 35 and then up to the pipe 40 carriage 41 on the lower walls 22 by means of rollers

34, then runs in a strong turn between 43 is movably supported, which in an horizontally

the lower tube 35 and the upper tube 34 are arranged on bearings mounted on len rails 51,

the entire length of the framework and connect which in turn are separated by fixed columns 52

det the upper and lower tubes are supported together.

stand firmly together. The intermediate tube 37 of a 45. Each carriage 41 works in the longitudinal direction over each truss frame goes from one end of a slit-shaped opening 44 which hits the truss frame (Fig. 1) and connects the zebresistant cover on the upper side of the intermediate tube 36 and the The upper tube 34 is cut into the transverse wall 22 of the lower zone stands on part of the lengths of the tubes 34 and the carriage 41 is large enough to fit the edges of a 3i. In the same way, on the opposite 5 °, each opening 44 is to be covered and a tangled rope of the framework frame to provide the pipe 38 from the moderately tight-fitting, transverse, horizontal one end to various points between the cover for the opening, which ver-pipe 34 and Tube 36 and connects the two prevents filaments from entering the device and the tubes for part of their lengths. When the compartment structure below the upper portion of the transverse wall 22 is a single beam, the ends 55 are trapped, as well as preventing heat from escaping from the furnace connected to the tubes 37 and 38 through the opening. In addition, a continuous path for the cooling water reduces and forms the flow of water through the cover-forming car from one end to the other. When the two achieved sealing effect the amount of interconnected in the feed beam 32 and inside the furnace through the openings 44 in the together forming a fixed pair of 60 walls penetrating cold air. As also in FIG. 4, as shown in FIGS. 2 and 3, each carriage 41 is longer than the transverse one and the tubes 37 and 38 extend between the length of each slot-shaped opening 44 and see the two truss frames of the pair and allow reciprocating longitudinal movement connect the upper parts of the two frames firmly to the carriage in the longitudinal direction of the furnace without interfering with each other. Each bar is thus a rigid, open part of the opening to expose 65. Each opening 44 of a frame which greatly facilitates the application of a water-cooled tubular frame heat to all parts of the loading gule 45 around its upper edges is provided.
i «n especially including the use according to FIG. 6, each lifting beam has, as shown above

7 8

has been mentioned, likewise a plurality of uniform reciprocating motion in individual tubes, which at their ends come together in the longitudinal direction of the furnace of all feed beams and firmly connected by a sleeve 46.

who are. The ends of the tubes of each lifting truss- the bodcnbcfcucrlc area of the furnace is through

gcrs 33 as well as the sleeve 46 extend through the transverse walls 22 in zones of equal length The existing sleeve 47 on the alloyed base is divided, as shown in FIG. 1. This enables one Further opening 48 in the lower transverse wall makes it light that the individual beams or Fachwerkrah-22. men are made so that a truss frame

The sleeve 47 extends over the surface spanning each zone, thereby providing greater equality lower transverse wall 22 in a cover 49, io shape of the parts for easier maintenance and soft lies over the tubes of the carrier. The ab- repair is made possible.

Cover 49 and sleeve 47 act as a seal to When operating the embodiment of the invention

to prevent filaments from getting into the lower frame according to FIGS. 1 through 5 and 7 becomes one to be heated fall. One on the tubes of each lifting beam 33 batch 20 or the load to be heated Mounted under the tubular sleeve 46 bearing 50 is with 15 20 on the movable frame at the entrance 12 of the connected to a rigid frame 53 which is transferred from furnace by appropriate means. When interconnected rails is established, the furnace begins to operate and the clouds Movable in the longitudinal direction along the length of the furnace. and across the width under the lower zones begin to move, are the lifting transverse walls get lost. The frame 53 is through 20 bars 33 in a lower position, and the Beschikweiter Means described below for lifting the kungsgut is ab-carrier by the feed beam 32 33 supported by one in the vertical direction, which is in a retracted position ongoing reciprocating movement of the sleeve. When a work cycle is started 46 within the sleeve 47 in each lower transverse the feed bars move by a certain amount wall 22 movable. The ends of the pipes each stretch forward and stop, whereupon the the lifting beam 33 are lifted with water supply walking beams and the loading means or another suitable cooling medium away from the feed beam. The pre-connected, Push bars are then returned to their original position

VJe can be seen from Figure 3, the frame 53 is withdrawn. Then the lifting beams are moved downwards by powerful wide-flange uprights 54 and tubular 30, so that the load is supported back on shaped side uprights 55. The uprights 52 lower the feed beam, and the cycle are repeated on the underside of the furnace, as shown in FIG to ensure. The width of one intermittent movement to move. During flanschstchcr 54, the vertical support members 35 form the operation of the furnace, the load for the frame 53, which actuates the walking beam 33 through the furnace in one to the flow of heated. The tubular side posts 55 move gases through the furnace in the opposite direction by suitable guides or bearings 56 held in place. The hot exhaust gases move to th, which are attached to the uprights 52 and one to the inlet end 12 of the furnace and escape movement only in a vertical direction through the exhaust collector 26.
sen. . The walking beams 33 work continuously at

Both movable uprights 54 and 55 are fixed at a constant frequency with a perpendicular displacement The lower ends are arranged on lifting rails 61, which are just above and below the height of the net. which is distributed at a distance on the inside on each feed beam. Through this procedure Side of the lower transverse walls 22 are provided, and 45 are the points of support contact between extend across the furnace, as shown in the load and the lift and feed Fig. 3 and 4 is shown. Each lifting rail 61 changed bars and thereby each support point is supported on rollers 62, which are attached to angle levers of the load of the direct furnace heating 63 are arranged. The bell cranks are exposed by one for half the time the bean a pivot arm 65 attached tie rod 64 5 ° schickungsgut is located in the oven. This is a connected, which in turn has a corresponding great advantage insofar as it actuated any temperature force Drive means is connected, as decreases the differences between the places, sogai for example hydraulic cylinders 66. Hydraulic completely switches off, on which the Beschiksche Cylinders 66 are stored on each lower wall and the remainder of the load is disregarded and provide a lifting force along the 55 supports. Thus, all heat becomes essentially more substantial Length of oven. The cylinders can be shared by a uniformly on all surfaces of the charging Pump actuated and transmitted by known good. The use of support systems Means be synchronized to a uniform appearance in the form of bars according to the invention al; to allow lifting along the length of the oven. Load support members in the oven improved

The feed bars 32 can even to a large extent the transfer of heat from the sensing element 60 end of the furnace, as shown in FIGS. 1 and 5 all surfaces of the load, since the Trägei shown, driven by hydraulic cylinders 67 an open lattice frame below the Beschik each building directly with the accom- modation, resulting in better frying side of a carriage 41 at the discharge end means one opposite the heat.

65 A further embodiment of the invention is ii is bound. Each of a plurality of such cylinders is shown in FIGS. The stove is in his the can driven by a common pump execution similar to the embodiments voi and synchronized to a simultaneous, Figs. 1 to 7 with the exception that the stove au

Fireproof clad, fixed beams alternating with fireproof clad beams extending both in the longitudinal direction and in the height direction must be able to move in the furnace. The fixed beam can be a truss frame, which is made in the manner of a feed beam 32 with the exception that the beam is firmly attached to its Ends on the lower wall in the position shown in FIG. 8 is arranged as can be seen. In modification for this purpose, the fixed beam can consist of individual, tubular members or tubes 81 (Fig. H) exist, which are supported by vertical support tubes 82 extending from the bottom of the Oven and from the bottom walls at spaced locations along the entire length of the oven.

Fig. 8 shows the solid, water-cooled butting tubes 81 alternating with pairs of interconnected, water-cooled beams 83, which in are movable lengthways and vertically. The beams 83 are the walking beam girders in their construction 33 is the same as the embodiment described. As in Fig. 8, there are two bars 83 connected to one another by intermediate pipes 38. The ends of each pair of beams 83 extend by a heat-resistant covered carriage 41, which in the longitudinal direction in and over the öff opening 44 in each lower wall 22 similar to that described above in connection with the embodiment of FIG. 1 to 6 described is movable.

The tubes of each beam 83 extend down through the carriage 41 and are through a bearing 50 connected to another frame 84 which forms the base frame of the trolley. Frame 84 is mounted on rollers 43 for a longitudinal movement of the furnace.

Each carriage 41 is of sufficient width and length and extends over the sides and ends of the opening 44 and forms a horizontal transverse cover for opening 44 during longitudinal movement of the carriage. The carriage 41 is by rails 85 supported with a lower leg, which rests on rollers 86, which of suitable bearings is supported on a rail attached to the wall 22. The upper part of the carriage 41 is against perpendicular movement is held by arms 88 attached to rail 87 and extends

ίο over the lower leg of the in F i g. 8 shown Rail 85 to form a guide unit therewith. The beams 83 are made in the longitudinal direction moved by cylinders which are attached to the furnace frame at the discharge end and to the frame structure 84 are connected at the end in a manner similar to the embodiments of FIG. 1 to 6 corresponds.

When operating the embodiments according to F i g. 7 and 8, the work cycle is started with the load 20 on the fixed supports 81 rests and the frame pairs and the BaI-kenpaarc 83 lowered and in the direction of the discharge end to be arranged. The beams 83 are then in the longitudinal direction towards on the feed end of the furnace is moved towards until they reach a certain position. At this time the bars 83 are raised upwards in order to lift the load off the fixed bars 81, and then they are moved in the longitudinal direction towards the discharge end until they have reached their extreme forward position. The bars 83 are then used to deposit the goods to be loaded back onto the fixed beams 81 and on to their initial position in preparation for the next work cycle lowered. In this way, each load or each batch is processed moves the furnace from the infeed to the outfeed end.

For this purpose 2 sheets of drawings

Claims (1)

The invention relates to a beam for Hubbai r-atenian claims. kenöfen mjt vertjkal and / ocJcr horizontn | movable, 1. Beam for walking beam furnace with vertical and / beam, consisting of a bridge-like frame or horizontally movable bars, consisting of tubes through which coolant flows, whereby eit the Gu to be heated from a bridge-like frame of coolant 5 upper, horizontal pipe through which pipes flowed, an upper one being supported by a level. right tube supports the material to be heated, for heat treatment of large metal bodies, wi < characterized in that a white steel blocks, billets, slabs and the like. Are at teres, coolant-flowed tube (35) known under example multi-zone pusher furnace, in which the upper tube (34) is arranged and at least the annealing or charging material to be treated at least one tube (36, 37) arranged between them from the furnace inlet to the furnace outlet via a Ge in the counterbore formed by the tubes (34, 35), which is pushed through a network Curved right plane and the tubes (34, water-cooled girders or support tubes gebil 35) over points of contact with the formation of a det. These known pusher ovens work jedocr Truss frame (32, 33) connects. ~ 15 unsatisfactory because de;