US1763453A - Charging device for ovens of the rotary annular sole-plate type - Google Patents

Description

June 10, 1930. F. BARTLJNG I 1,763,453

CHARGING DEVICE FOR OVENS OF THE ROTARY ANNULAR SOLE PLATETYPE Filed June 27, 1927 s Sheets-Sheet, 1

June 10, 1930. REAR-FLING 1,763,453

CHARGING DEVICE FOR OVENS .OF THE ROTARY ANNULAR SOLE PLATE v TYPE Filed .nme'z'r. 1927 s Sheets$heet 2 June 10, 1930. Q BARTUNG 1,763,453

CHARGING DEVICE FOR OVENS OF THE ROTARY ANNULAR SOLE PLATE TYPE Filed June 27, 1927 3 Sheets-Sheet 3 b I I W6, 5

Patented June 10, 1930 UNITED STATES PAT NT QFFWE FRIEDRICH BABTLING, OF MUNICH, GERMANY CHARGING DEVICE FOR OVENS OF THE ROTARY SOLE-PLATE TYPE Application filed June 2'7, 1927, Serial No. 201,954, and in Germany January 15, 1927.

This invention relates to ovens of the rotary annular sole type such as shown in my copending application Ser. No. 201,958, filed on the same date. herewith, and in particular 5 concerns improvements in the feeding mechanism for such a furnace.

The feeding mechanismfor the annular soleplatecoinprises means for passing the material for treatment to a distributor bar which spreads it in a uniform thin layer upon the sole plate as the latter rotates past the charging position; The charging means comprises acharging hopper and a feed box having the distributor proper guided thereby; and a relative movement between the charging hopper and the feedbox is permitted radially withrespect to the axis of the sole plate itself, so that during movement 90 of the sole plate arising by change of size *1 owing to temperature or to warping, the feed box is permitted to follow the sole plate in its movements, without the necessity of moving the relatively heavy charging hopper and or its contents. W1th the same ob ect, the feed box, itself is supported lndependently of the sole plate, while the distributor is guided by the feed box but relatively supported on the sole plate so that the layer of material spread by the distributor remains uniform inthickness. he conduitbetween the charging hopper and the-feed box constitutes the only communication between the oven chamber and the charging hopper. Oven gases, as for instance vaporsarising from distillation of the material or otherwise, are carried off as customary through special conduits. Furthermore, according to the present invention this conduit itself is closed at both top and bottom by gates which operate to pass the material without opening the conduit for the direct passage of such vapor, which prevents the undesired movement of the vapor, and at the same time prevents thepropagation of combustion or an explosion from the oven chamber to the charging hopper, which is a desirable result while coking coal or similar materials subject to combustion or explosion, inasmuchasthe combustion or explosion is thereby limited to the thin layer of material the bearing members.

present on the sole plate. Means are provided to support the said box fonpermissive movement relative to the :sole plate and to cause said movement to occur in a rectilinear direction and substantially radial with respectto-the axis of the sole plate itself.

The accompanying drawing illustrates one constructional form of apparatus in accordance with the present! invention. In the drawing Fig. 1 shows the new device in a radial section through the annularovemwhile Fig. 2 is a part-sectional view through the upper part of the apparatus, thesection being taken 011 the line 22 of Fig. 1.

Fig. 3 is a plan view of the annular furnace, showing the'charging station and its parts. i

Fig. 4 is adetail view on an enlarged scale, substantially on line H of Fig. 1. 9

Fig. 5 is a similar detailview on enlarged scale, substantially in section on line 5-5 of u- 1 1g. 1. i i

In the apparatus here illustrated an annular sole plate 5 carried on suitable supports '6 rotates within an oven chamber a, of arched section, open at the bottom. At the place Where'acharging is effected is arranged a stationary box 0, within which is a flexible tube cl connecting the charging hopper (Z to the feed box 6. This latter is provided, on each ofits transverse sides with a bar, for instance, with angle-irons f secured to the box by riv ets or the like. Each bar is supported on two bearing members 9, rollers 9 balls, orthe S5 like,*being interposed between the bars and These bearing members are carried on fixed bosses 0 on the wall of the box 0 (see Fig. 2). Rollers or shaft stubs 2' may, with advantage, be inserted between the bearing members g and the supports 0 to insure that parallelism between the said bearing members and the bars f shall be maintained automatically. r r

It follows that the whole weight of the feed 9 box is taken up by the bearing members and that,when the sole plate I) expands or contracts in a radial direction, the said feed box can adjust itself freely in the same sense.

The rotating sole 5 is provided with marginal rails Z, upon which rest the slides m of a distributor plate a. Balls, rollers, or other antifriction devices m may be interposed between these slides m and rails Z (Fig. 5). The distributor n is engaged between the two marginal rails Z and the distance between the hearing surfaces ofthe slides m and the bottom edge of the said distributor determines the thickness of the layer to be spread on to the sole. 7

The distributor n is so attached to the wall of the feed box e that it can move relatively thereto ina vertical direction. Sheet iron members, such as 0, may, for instance, be used to hold it in position. As shown in Fig. 4, the sheet metal member 0 is riveted to the gate chamber 9, and has a downwardlyextending flange 0 which is spaced from this chamber 9, and passes through a notch n formed in the distributor n, so that the distributor may move upward and downward tween the rear wall of the chamber Q and the finger 0, while being at all times prevented from movement with the sole plate Z). Furthermore, yielding loading means may be employed to press down the distributor firmly on to the marginal rails of the sole; for example, a lever 17 loaded with an adjustable weight can be usedfor this purpose.

In order to render the oven safe, in operation, against the possibility of explosion, the feeding device is furnished at top and bottom with tubular enlargements (1,39 In these enlargements are mounted shafts h, h, fitted with vanes r, 1' adapted to close tightly against the walls of said enlargements both above and below the feed box 6. When the shafts h, k are rotated, anaccurately mea sured quantity of the combustible material is taken up at regular; intervals by the fanshaped cavities between the VEIIGSJ'fiBd a like quantity is discharged; at the bottom by the similar cavities between the vanes 1". The gearing is including a shaft cone pulley t, and a bevel gear H are driven from any suitable means. The cone pulley t is connected by a belt u with .a cone pulley 0 on the shaft 4), which in turn has a pulley w engaginga belt w to drive apulley a on the shaft h. The shaft o likewise drives the gearing'y for the shaft it. Further, the gear H engages the annular gear Gr on the carriage IV for the sole plate. In this way, as the shaft 70 turns, the sole plate is driven through its gear G, whilethe two gates or vanes 'r', r are driven positively therewith at a speed ratio which may be determined by the adjustment of the belt a on the cone pulleys t and 1). I r

The manner in which the safety device operates to prevent explosions is as follows The feed hopper d is kept full of the material to be treated. As soon as the sole plate I) commences to rotate, the shafts h, h start to turn also, at a'predetermined speed which is adjustable in relation to the speed of rotation of said sole. The fan-shaped cavities between the vanes 1' in the upper gate then take periodically from the feed hopper d a measured quantity of material and deliver it to the distributing apparatus beneath. Here the material'received falls beween the vanes r of the bottom gate, while a corresponding amount of combustible material is simultaneously supplied to the sole 6, whereon it is spread by the distributor bar n. As soon as any disturbing influence causes the sole to stop rotating the supply of material to the oven is also immediately arrested, since the shafts h, 71. come to a standstill. If an explosion actually does take place in the interior of the oven, ignition cannot extend to the store of material contained, in the hopper, since, apart from small quantities of combustible material contained in the gates, the feed box 6 is empty, while the main body of combustible material in the charging hopper d is completely isolated from the heat of the oven and the influence of the oven gases.

Claims: r 4

1. In a charging apparatus for an oven having a rotary annular sole plate with marginal rails, a charging hopper supported above the sole plate, a feed box having means engaging said rails to determine the radial position of said feed box with respect to the axis of the annular sole plate, a flexible conduit connecting said hopper and said box to permit such radial movement, and means independent of said sole plate to support said box in its movements.

2. In a charging apparatus for an oven of the rotary annular sole type, a charging hopper, supported above the sole plate, a feed box located immediately above the sole plate and supported independently of said sole plate, a conduit connecting said hopper and feed box, and feeding gates located at the top and bottom of said conduit to prevent the flow of gases from the sole plate toward the charging hopper, said feed gates operating to deliver small regulated quantities of material from the charging hopper into said feed box.

3. Charging apparatus for ovens having a rotary annular sole plate, a feed box located abovethe sole plate to supply material thereto, a bar fixed to said feed box and extending radially with respect to the axis of said annular sole plate, bearing members to support the bar for movement in the direction of its length, and fixed pivots on the oven structure,-said bearing members being mounted onsaid fixed pivots.

4. In a charging apparatus for a rotary. oven having an annular sole plate, a charging hopper located above the sole plate, a feed box supported independently of said sole plate, a conduit connecting said hopper and said feed box and constituting the only communication therebetween,.a plurality of gates in said conduit each adapted to pass

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