DE2262466A1 - COLLECTING DEVICE FOR USE IN CONNECTION WITH A MANHOLE MAKER - Google Patents

Description

DipUnc ,. H. MITSCHERLICH J MONKS 22

Dipl.-Ing. J. SCHMIDT-EVERS

PATENT LAWYERS

SSLAS CORPORATION Q3 ¹ AiIERIGA _. _ _n

2o. December Dresher , Pennsylvania, 7th St.A.

THE DO'J CHEMICAL COMPAHI
Midland , Michigan, Y.St.A.

P at entment 1 application

Collecting device for Q-consumption in connection with a shaft furnace

The invention relates to a collecting device for Use in conjunction with a tower oven.

In particular, the invention relates to the manufacture of a ceramic foam product and relates to in particular the device for driving a collecting conveyor belt on which the material forming the foam is collected will.

When producing ceramic foam, small particles of clay or clay or something similar are allowed Material that can be inflated falls through an inflation zone of a tower furnace. During the fall, the Particles are expanded into individual hollow spheres, which are then collected as an agglomerated mass in the lower part of the furnace will. This mass is removed from the barely under the furnace with a speed which varies according to the thickness aligns the plate or the like to be produced from it,

The high temperature that the particles in particular having them immediately below the furnace where they are collected creates difficulties in the collection device.

3Q9827 / QS11

I ₇₁ these difficulties are primarily due to the "delay and the short service life of the collecting conveyor belt.

Various double drive devices have already been proposed which are used in the conveyor belt to influence occurring tensions in the desired way.

The invention is based on the object of a collecting device for use in connection with a tower furnace to withstand the high temperature acting on it practically for an unlimited time, and to use a novel drive device for a collecting conveyor belt in this collecting device, which under the exposure to a high temperature should be operable.

In order to achieve the stated object, the invention provides a collecting device for use in connection has been created with a tower furnace having an opening at its lower end, the falling through the opening Receives material, and to which an endless conveyor belt belongs, which forms an upper and a lower strand, which are located under the furnace and on both sides of the furnace move horizontally, further two drive drums over which the conveyor belt runs, a first device, the one the drive drums to drive the upper strand of the conveyor belt at a predetermined speed move and remove the material from the space under the furnace, as well as sprockets in particular according to the invention, one of which is non-rotatably connected to each end of the other drive drum, a second drive device for applying a constant torque as well as a device which serves the second drive device to connect independently with the sprockets to provide a constant torque on the lower strand of the conveyor belt to apply that comes into play in one direction,

309827/081 1

• =. > 3 -

that of the direction of movement of the upper conveyor belt strand. is opposite.

The invention and advantageous details of the invention are illustrated below with reference to the schematic drawings explained in more detail using an exemplary embodiment, it shows:

Fig. 1 shows a collecting device in a section along the line 1-1 in Fig. 2 \

I ¹ Ig. Fig. 2 is a cross section in which the left part corresponds to line 2A-2A and the right part corresponds to line 2B-2B in Fig. 1;

3J ¹ Ig. 3 in a shortened plan the rear device for driving the conveyor belt; and

Fig. 4- the rear drive device in one reduced schematic side view.

. The collecting device includes an endless conveyor belt 1, which over a front drum assembly 2 and a rear drum assembly 5 runs on its construction detailed below vri.rd. The upper strand of the Conveyor belt 1 moves below a preheating zone 4-, a Samuel zone 5 and a solidification zone 6, the one Kühlungsζone 7 is adjacent, which is attached to the Solidification zone 6 adjoins.

The conveyor belt 1 is designed as an endless belt 8 made of a wire mesh which is made of an alloy that can withstand the operating temperature of the conveyor belt. The long edges of the conveyor belt are on roller chains 11 attached, which are used, the conveyor belt along its Train to lead and move. The den of the upper-strands both roller chains 11 run on guide rails 15, those the top. Strand of the conveyor belt in the desired .maintain the plane of motion. while the lower strand of the Conveyor belt that supports the roller chains

309 827/08 11

is that the lower strands of the chains move along lower rails 14-.

A release agent is applied to the upper strand near the left end of the conveyor belt 8. In order to make this possible, there is a reservoir -15, whose The lower end is designed as a discharge channel 16 of rectangular cross-section, the length of which is equal to the width of the conveyor belt is. The release agent is a granulate and has good thermal insulation properties; it flows through the Discharge channel 16 onto the upper strand of the conveyor belt moving from left to right according to FIG. 1. aside from that there is a plow 17 by means of which the upper side of the layer formed from the release agent is smoothed. This Plow is height adjustable so that the thickness of the release agent layer on the conveyor belt can be determined as required can. The upper strand of the conveyor belt runs from left to right under a fire-resistant structure 18, which delimits the preheating zone 4. In the side walls and the ceiling of the structure 18 several burners 19 are built, by means of which the top of the Release agent layer is heated to a temperature which approximately corresponds to the temperature of the material that is to be collected in the adjacent collection zone 5. Since the release agent acts as an insulating material, the conveyor belt itself is kept relatively cool.

The collecting zone 5 is immediately below the open one lower end of a tower or shaft furnace 21 of known type.

If the conveyor belt carrying the separating agent layer passes through the collecting zone 5 », this happens in the shaft furnace 21 Falling material collected on the release agent layer. Here, the material according to FIG. 1 forms an irlatte 22, the thickness of which is reproduced as the conveyor belt moves gradually enlarged on the right. The final thickness of the resulting plate depends on the running

309827/08 1 1

speed of the conveyor belt as well, according to the volume of the material falling in the furnace per unit of time. Once a "certain part of the conveyor belt is the right end." When it reaches the collecting zone 5, the plate has the desired size Thickness. The plate is then transferred by the conveyor belt into the solidification zone 6, in which the collected, the plate forming material cools sufficiently so that a rigid, self-supporting plate is formed. The freezing zone 6 is delimited by a fire-resistant structure 23 surrounding the conveyor belt, and that in this As in the case of the preheating zone 4, the temperature prevailing in the zone can be regulated with the aid of burners 19.

As can be seen in particular from the left-hand part of FIG. 2, the lower sand of the side wall of the refractory structure 23 is provided with two downwardly projecting strips 26 which protrude into the adjacent longitudinal edge of the separating agent layer and form a "sand seal ¹ 'which enables penetration cold air is prevented at the longitudinal edges of the conveyor belt. A similar construction is present on the other side of the refractory structure 23, and the side walls of the structure 18 which delimit the preheating zone 4 and the structure which delimits the collecting zone 5 under the furnace, are provided with similar sand seals Thus the entire space, which begins where the separating agent is applied to the conveyor belt and which also includes the cooling zone 7 according to Fig. 1, forms a closed chamber, the movable floor of which is formed by the conveyor belt.

The plate 22 is carried by the hollen 25 and passes through the cooling zone 7? which has the required length. Since the conveyor belt does not enter the cooling zone, the construction delimiting this zone completely encloses the rollers 25, so that the plate continues to run through a chamber that is closed on all sides. The ends of the drum ^assembly are fitted with sealing devices.

309 8 27/0811

see to the Lindringen cold air between the freezing zone and to prevent cooling, ε zone, so that regulated the record from the time it was created. Conditions.

When the conveyor belt 8 is over the front drum assembly 2 runs, the separating agent falls into a collecting trough extending transversely to the longitudinal axis of the collecting device 27 »from which it is discharged by means of a conveyor chain 28 which, as shown in FIG Chain wheels 29 and 31 arranged in the collecting device runs. The chain wheel 31 is driven by an eotor 32. The conveyor chain 28 includes two individual chains that are connected by rod-shaped; e links 33, which are move along the trough 27 to remove the release agent and from to transport the longitudinal edges of the plate 22 cut small pieces to a collecting container 34- from which these substances are recycled »

Z of the front drum assembly 2 belongs according to Pig. I a shaft 35 »which extends transversely to the longitudinal axis of the collecting device and is mounted in bearings 36 supported by the frame of the device. On the shaft 35 a cylindrical drum 37 (Pig» 1) supporting the conveyor belt 8 is arranged, and the shaft carries between the bearings 36 and the adjacent ends of the cylindrical drum 37 chain wheels 39 which work together with the roller chains 11 attached to the conveyor belt 8. The shaft 35 carries, according to Figure Operable Kotor 42 is driven, Vwenn the motor 42 rotates the shaft 35 and the named components non-rotatably connected to it, it moves the upper strand of the conveyor belt according to FIG the side of the collecting device facing the motor 42 by the bearing 36 in its position

309827/08 1 1

■ _ -π -

held. The drive sprocket 41 and the sprocket 39 on the opposite side of the device are keyed to the drive shaft 35. In order to enable axial expansion movements of the shaft 35, the sprocket 39 is keyed to the shaft on the side facing away from the motor 42, but can be displaced along the shaft .

The rear drum assembly 3 is of the same construction as the front drum assembly 2. The drum 3 is assigned a shaft 43 which carries two chain wheels 44 which work together with the roller chains 11 of the conveyor belt. So that the conveyor belt can expand both in the longitudinal direction and in the width direction, the bearings for the shaft 43 are arranged to be movable. Z ₁₇ - for this purpose one end of the shaft 43 is mounted in a bearing 45 which, according to FIG. 4, can be displaced in a guide 46 in the direction of movement of the conveyor belt. The other end of the shaft 43 is mounted in a bearing 47, which can also move in a guide 48 in the direction of movement of the conveyor belt. The guide is arranged on a plate 49, on the ends of which an axis 5I arranged parallel thereto is mounted which, according to FIG. 3, carries a roller 52 at each end. One end of the plate 49 is provided with a third roller 53. The one roller 52 runs together with the roller 53 on a guide 55? while the second roller 52 runs on a guide 54. This second end of the shaft 43 is thus supported in a bearing which can move inwards and outwards when the conveyor belt and the drum 3 expand in the direction of the axis "of the drum. According to FIG. 1, the shaft 43 is to the left preloaded to avoid slack when the length of the conveyor belt changes, for this purpose, as shown in Figure 3, there are two chains 56, each connected at one end to bearings 45 and 47, cooperating with sprockets 57 'and at their other ends end up

309827/08 11

Carry counterweights 58 (Fig. 1). The two sprockets 57 are keyed to an axis 40 to balance the force between the two longitudinal edges of the conveyor belt for the To cause fur that the roller chains 11 expand unevenly.

The bsmmelförderband 8 has together with the one on it resting load has such a great weight that it is expedient to assign a drive device to each end of the conveyor belt. The device drivable by the motor 42 for driving the front end of the conveyor belt pulls the The upper strand of the conveyor belt with the separating means and the plate 22 according to FIG. 1 to the right away from the furnace 21. The lower strand of the conveyor belt is driven by a hydraulic drive which is designed so that it practically drives the two ends of the shaft 43 separately. With the help of this drive device it is possible to the parts of the two Hollenketten 11 connected to the lower strand of the conveyor belt have a constant tensile force to raise, regardless of the respective Position of the shaft 43 and regardless of whether the V / elle may or may not expand in the axial direction. This drive device is driven by a motor 61, which is shown in FIG. 3 with the drive shaft of a hydraulic Transmission 62 is coupled to produce a constant torque. With the drive shaft of the transmission 62 is a sprocket 64 connected, which has a liette 65 a second .Kettenrad 66 drives, which rotatably with a extending transversely to the longitudinal axis of the collecting device Vitelle 67 is connected. On the "shaft 67 there are two chain wheels 68 and 69, which serve to drive the ends of the shaft 43 adjacent to them. The Kr af tuber tr agungis facilities between the vial 67 and the two ends of the shaft 43 are of the same construction, and in Fig. 3 are therefore corresponding components each with the with the same prefix numbers. The sprocket 68 on the shaft 67 drives an intermediate shaft 71 via a chain

309827/081 1

and a sprocket 73. Sitting on the intermediate shaft 71 another chain wheel 74 - »that via a chain 75 on the outer end of the shaft 4-3 seated sprocket 76 drives. The lower strand of the chain 75- is held vertically by a tensioning sprocket 77 »which is on the upper end of a arranged rod 78 is rotatably mounted, under a kept constant tension. For this purpose, the rod 78 is supported by a compression spring 79 with a constant Force biased downwards. The upper strand of the chain 75 runs over a deflection sprocket 80, and one in this Any strand slack is eliminated by a second tensioning sprocket 81, which is on the free end of a Arms 82 is mounted, which according to Jig. 4- with his other The end is rotatably mounted on a fixed axis 83 built into the frame of the collecting device.

If the collecting device is to be put into operation, the motor 61 is first used to drive the rear drum assembly 3 switched on in order to apply a constant torque to the lower strand of the conveyor belt, without the upper strand of the conveyor belt being set in motion. Then the motor 4-2 is used to drive the front Drum assembly 2 switched on and set to the desired running speed of the conveyor belt. Here the chain wheels 39 exert a tensile force on the shaft 35 the upper strand of the conveyor belt to keep this strand taut. As soon as the conveyor belt starts to close move, the release agent is applied to the upper strand in the form of a layer, the thickness of which varies according to the Position of the fluid or scraper 17 directs. While the release agent passes through the preheating zone 4-, the Top of the layer heated to a temperature substantially equal to the temperature of the puffed particles falling on the release agent layer as the conveyor belt moves below the furnace 21. Here * arises a flatten 22 of the desired thickness, which is in the

309827/0811

- ίο -

Solidification zone 6 is cooled so far that it is when Reaching the front tube assembly 2 self-supporting has become. Wunmore passes through the plate 22 on the Fill 25 the cooling zone 7> during the release agent the Vrog 27 is delivered. This material is in the described manner by the rod-shaped driver 33 to the collecting container 34 · to then be eliminated or to undergo treatment before re-use.

The rear shaft 43 carrying the sprockets 44 is driven by the hydraulic transmission 62, which, as mentioned, has separate, equally large driving forces. both ends of the shaft 43 applies, and when the length and change the width of the conveyor belt due to thermal expansion or contraction, these changes will occur balanced by the G, weighted 58. The. Drive chains 75 are under the action of the tensioning chain wheels 77 pretensioned by the compression springs 79, so that these chains are exposed to constant tension and even then slightly equal torques on the sprockets 7 & on the iiiden the shaft 43 when there is a longitudinal edge of the conveyor belt expands more than the other. Consequently the upper strand of the conveyor belt 8 is driven by the front shaft 35 and the motor 42 at a predetermined running speed driven. The lower strand of the conveyor belt is driven at a speed that increases according to the running speed of the upper strand, and the lower strand is under constant tension held, compensating for changes in the length of the conveyor belt. Because the endless conveyor belt at both ends is driven in its path, the tension under which the conveyor belt must be held is reduced and it persists Guarantee that the drive devices do not jam.

309827/0811

pas release agent is applied to the top of the upper conveyor belt strand in the form of a layer Thickness is chosen so that the insulating effect of the release agent makes overheating of the conveyor belt impossible.

The space above the conveyor belt, which encloses the flap, practically forms a chamber which is closed on all sides, the bottom of which is formed by the conveyor belt ₅ and the internal temperature of which can be precisely regulated. Because the space between the strands of the conveyor belt and below the lower strand is in open communication with the atmosphere. and if necessary can be cooled with the help of inevitably circulated air, it is possible to keep the various components made of metal at a temperature that is considerably lower -Is the temperature provided by the design, so that the service life of these components is extended accordingly.

Patent claims :

309827/081 1

Claims (6)

PATENT CLAIMS 1. Collection device for use in connection with an " Oven to collect falling through the opening Material with an endless conveyor belt »that forms an upper and a lower strand, which are located under the Shaft furnace and move horizontally on both sides of the same, two drive drums over which the conveyor belt runs, as well as a first drive device that drives one of the drive drums. the upper one. Strand of Conveyor belt ii. To move at a predetermined speed and the falling material from the bar, .under to remove the shaft furnace, thereby g e k e η η,? - ■ .... ■ ζ e i c h net that with, each end of the other drive pulley (3) or the associated drive roller (43) a sprocket '(76) is connected that a second drive ---' · · means (61, 62) for applying a constant torque is present, and that further means (63 to 69) connect the second drive device to the chain wheels by separate power transmission paths in order to on the lower strand of the conveyor belt - (8) a constant- To apply torque that acts in a direction that opposite to the running direction of the upper strand of the conveyor belt ' is. '' ■ ■ · ■■■ ■■■■■■ ' 2. Device according to claim 1, g e k e η η- ■ · ■■ ■ ζ e i c h η e t · through facilities (4 ^, 47, 46, 49),> ■■ by means of which the other drive drum (3) supports PO is that it is in the direction of movement of the conveyor belt des (B) is movable to compensate for changes in the length of the conveyor belt, as well as by means of devices (4φ, 57 »56» 58) for pre-tensioning the support equipment in such a way that 09827 / 08U that any Durciahang occurring around the conveyor belt is eliminated. 3. Apparatus according to claim 1 or 2, characterized in that with the conveyor belt (8) on both sides of the shaft furnace (21) a construction (18, 23) delimiting a chamber above the conveyor belt cooperates that a device (15 ».16 ') for applying a layer of insulating material on the conveyor belt in front of the construction, and that the construction is provided with devices (19) on both sides of the furnace is provided for heating the construction. 4. Apparatus according to claim 3 »characterized in that each side wall of the structure (18, 23) is provided with devices (26) which protrude into the layer of material applied to the conveyor belt (8), to seal the gaps between the side walls and the conveyor belt. 5. Device according to one of claims 1 to 4, characterized in that on one side of the shaft furnace (21) under the conveyor belt (8) a trough (27) extends transversely to the longitudinal axis of the structure (23), into which the insulating material falls when the conveyor belt runs over the adjacent drive drum (2), and that a device (28, 33) for removing the insulating material from the trough is available. 6. Device according to one of claims 1 to 5 »characterized in that a shaft (43) is present on which the other drive roller (3) is mounted is that with each end of this shaft a sprocket (76) is rotatably connected that to the second drive device (61, 62) two chains (75), which drive the sprockets separately, and that one device (81) exists which serves to drive the 309827/0811 _ 14 - Keep parts of each chain under constant tension. 7 · Device according to one of claims 1 to 6, characterized characterized in that built into the construction (18, 23) burners (19) for heating the chamber are. The patent attorney; 309827/0811