New apron style steel pan conveyor system (SZB 250®) for hot material transport
For the development of the new apron style steel pan conveyor system SZB 250 the known requirements of the cement plants were thoroughly studied and on the basis of the existing experience new solutions were developed. The essential requirements of the cement plants are as follows:
•Efficiency,
•Sturdiness and
•Suitability for inclined conveying.
Based on these main features a modular system with diverse possibilities was created.
The efficiency is decisively determined by the availability, the service life and the maintenance and repair requirements of the apron style steel pan conveyor system. These features were especially taken into consideration for the development of the new apron style steel pan conveyor.
The apron style steel pan conveyor system SZB 250 consists of the modules belt pan, roller and chain with a common interface on the attachment point. The interface is dimensioned in such a way that it is adaptive to all roller and chain types without modification. So the number of parts was drastically limited. The interface is easily accessible so that maintenance and repair are essentially facilitated.
For weight reasons the sturdiness must not be achieved with generous spending on materials, but by structural measures aiming at a reduction of the stress level of the apron style steel pan conveyor system. These structural measures are:
•short moment arms,
•self-supporting belt pan system,
•wide attachment base and
•frame structure for the belt pan.
Inclined conveying of hot materials involves high requirements for:
•the tightness,
•the wear properties and
•the dead weight
of apron style steel pan conveyor. Here the apron style steel pan conveyor SZB 250 sets new standards.
Figure 1 shows the longitudinal and cross section of the apron style steel pan conveyor system SZB 250 where the basic configuration and functioning can be seen. (Foerderrichtung = Conveying directio
Figure 2 shows the modules: (1) Belt pan (Bandzelle); (2) Roller with bracket (Laufrolle mit Halter) and (3) Chain (Kette).
These modules have a common interface at the attachment point. For all possible versions of the apron style steel pan conveyors this interface could be kept equal and is therefore not subject to chain and roller size.
The good accessibility allows easy changing of the roller and that with simple tools. This facilitates the preventative maintenance and repair of the apron style steel pan conveyor system thus enhancing the high availability. The possibility of bolting a roller bracket to every pan underlines the modularity of the apron style steel pan conveyor system impressively.
The sturdiness of an apron style steel pan conveyor is not only influenced by the forces acting on the belt pan which result from the bulk material weight, but also by the method how the power flow is led to the roller and to the chain.
For the apron style steel pan conveyor SZB 250 the belt pans as shown in Figure 3 are self-supporting and therefore it is not necessary to support them via the chain by means of cams and lugs. This has a positive effect on the service life of the chain.
The usual chain fastening under the bottom plate by means of angle straps produces an additional moment due to the distance from chain to roller. This moment, resulting from the dead weight of the chain and from the moment arm (chain / roller) produces an additional load spectrum which has to be absorbed by the bottom plate. The chain fastening to the roller bracket as shown in Figure 2 applies the additional load spectrum to the bottom plate and thereby contributes to a higher sturdiness.
Depending on the filling level the material conveyed in the belt pan presses against the skirt boards with different forces. As impressively documented in Figure 4 a counteracting force is produced which prevents the skirt boards from bending up. Therefore, the stress applied to the welded joint "skirt board / bottom plate" is also reduced considerably.
Other structural design features are:
•The roller bracket forms a sturdy frame at the joint "skirt board / bottom plate“.
•The projection of the skirt boards (see Figure 1) distributes uniformly on both sides of the bottom plate.
•Due to the short moment arm the roller axle, from the roller to the roller bracket, is highly resistant to bending and thus enhances the sturdiness of the whole system.
The bolted connection (bottom plate / roller / chain) is not contacted with the bulk material and therefore not exposed to a specific thermal stress.
The large clamping length of the hexagon bolts in connection with the large bolt spacing and the self-locking hexagon nut is the basis for a reliable bolted connection.
As an apron style steel pan conveyor cannot be designed like an enclosed, circulating conveyor belt, but consists of many individual, scale-like overlapping belt pans, the tightness and the susceptibility to wear are of special importance. The apron style steel pan conveyor SBZ 250 sets new standards.
Figure 5.1: Chain pivot point
Swivel angle 24°
Half swivel angle for gear, number of teeth=7.5.
The sealing gap is not in the bulk material. The hinge movement takes place without contact.
The sealing gap remains closed.
Figure 5.2: Chain pivot point
Swivel angle 48°
Maximum swivel angle for gear, number of teeth=7.5.
The sealing gap is not in the bulk material. The hinge movement takes place without contact.
The sealing gap remains closed.
Figure 5.3: Chain pivot point
Swivel angle 34°
Maximum swivel angle for gear, number of teeth=10.5.
The sealing gap is not in the bulk material. The hinge movement takes place without contact.
The sealing gap remains closed.
Figure 5.4: Chain pivot point
Swivel angle 29°
Maximum swivel angle for gear, number of teeth =12.5.
The sealing gap is not in the bulk material.
The hinge movement takes place without contact.
The sealing gap remains closed.
As a summary to the subject "tightness" it can be stated:
•Hinge geometry is adapted to all chain sizes optimally (the pivot point is maintained for all chain sizes).
•Sealing properties are adapted to all sprocket sizes optimally (also for gears with number of teeth = 12.5 no material remains in the sealing chamber).
•Self-cleaning of the sealing chamber.
•No risk of destruction by material deposits on the lower belt.
For additional information, please contact Mr. Norbert Kleinerüschkamp.
Steel Apron Conveyor for Hot Materials
New apron style steel pan conveyor system (SZB 250®) for hot material transport
For the development of the new apron style steel pan conveyor system SZB 250 the known requirements of the cement plants were thoroughly studied and on the basis of the existing experience new solutions were developed. The essential requirements of the cement plants are as follows:
•Efficiency,
•Sturdiness and
•Suitability for inclined conveying.
Based on these main features a modular system with diverse possibilities was created.
The efficiency is decisively determined by the availability, the service life and the maintenance and repair requirements of the apron style steel pan conveyor system. These features were especially taken into consideration for the development of the new apron style steel pan conveyor.
The apron style steel pan conveyor system SZB 250 consists of the modules belt pan, roller and chain with a common interface on the attachment point. The interface is dimensioned in such a way that it is adaptive to all roller and chain types without modification. So the number of parts was drastically limited. The interface is easily accessible so that maintenance and repair are essentially facilitated.
For weight reasons the sturdiness must not be achieved with generous spending on materials, but by structural measures aiming at a reduction of the stress level of the apron style steel pan conveyor system. These structural measures are:
•short moment arms,
•self-supporting belt pan system,
•wide attachment base and
•frame structure for the belt pan.
Inclined conveying of hot materials involves high requirements for:
•the tightness,
•the wear properties and
•the dead weight
of apron style steel pan conveyor. Here the apron style steel pan conveyor SZB 250 sets new standards.
Figure 1 shows the longitudinal and cross section of the apron style steel pan conveyor system SZB 250 where the basic configuration and functioning can be seen. (Foerderrichtung = Conveying directio
Figure 2 shows the modules: (1) Belt pan (Bandzelle); (2) Roller with bracket (Laufrolle mit Halter) and (3) Chain (Kette).
These modules have a common interface at the attachment point. For all possible versions of the apron style steel pan conveyors this interface could be kept equal and is therefore not subject to chain and roller size.
The good accessibility allows easy changing of the roller and that with simple tools. This facilitates the preventative maintenance and repair of the apron style steel pan conveyor system thus enhancing the high availability. The possibility of bolting a roller bracket to every pan underlines the modularity of the apron style steel pan conveyor system impressively.
The sturdiness of an apron style steel pan conveyor is not only influenced by the forces acting on the belt pan which result from the bulk material weight, but also by the method how the power flow is led to the roller and to the chain.
For the apron style steel pan conveyor SZB 250 the belt pans as shown in Figure 3 are self-supporting and therefore it is not necessary to support them via the chain by means of cams and lugs. This has a positive effect on the service life of the chain.
The usual chain fastening under the bottom plate by means of angle straps produces an additional moment due to the distance from chain to roller. This moment, resulting from the dead weight of the chain and from the moment arm (chain / roller) produces an additional load spectrum which has to be absorbed by the bottom plate. The chain fastening to the roller bracket as shown in Figure 2 applies the additional load spectrum to the bottom plate and thereby contributes to a higher sturdiness.
Depending on the filling level the material conveyed in the belt pan presses against the skirt boards with different forces. As impressively documented in Figure 4 a counteracting force is produced which prevents the skirt boards from bending up. Therefore, the stress applied to the welded joint "skirt board / bottom plate" is also reduced considerably.
Other structural design features are:
•The roller bracket forms a sturdy frame at the joint "skirt board / bottom plate“.
•The projection of the skirt boards (see Figure 1) distributes uniformly on both sides of the bottom plate.
•Due to the short moment arm the roller axle, from the roller to the roller bracket, is highly resistant to bending and thus enhances the sturdiness of the whole system.
The bolted connection (bottom plate / roller / chain) is not contacted with the bulk material and therefore not exposed to a specific thermal stress.
The large clamping length of the hexagon bolts in connection with the large bolt spacing and the self-locking hexagon nut is the basis for a reliable bolted connection.
As an apron style steel pan conveyor cannot be designed like an enclosed, circulating conveyor belt, but consists of many individual, scale-like overlapping belt pans, the tightness and the susceptibility to wear are of special importance. The apron style steel pan conveyor SBZ 250 sets new standards.
Figure 5.1: Chain pivot point
Swivel angle 24°
Half swivel angle for gear, number of teeth=7.5.
The sealing gap is not in the bulk material. The hinge movement takes place without contact.
The sealing gap remains closed.
Figure 5.2: Chain pivot point
Swivel angle 48°
Maximum swivel angle for gear, number of teeth=7.5.
The sealing gap is not in the bulk material. The hinge movement takes place without contact.
The sealing gap remains closed.
Figure 5.3: Chain pivot point
Swivel angle 34°
Maximum swivel angle for gear, number of teeth=10.5.
The sealing gap is not in the bulk material. The hinge movement takes place without contact.
The sealing gap remains closed.
Figure 5.4: Chain pivot point
Swivel angle 29°
Maximum swivel angle for gear, number of teeth =12.5.
The sealing gap is not in the bulk material.
The hinge movement takes place without contact.
The sealing gap remains closed.
As a summary to the subject "tightness" it can be stated:
•Hinge geometry is adapted to all chain sizes optimally (the pivot point is maintained for all chain sizes).
•Sealing properties are adapted to all sprocket sizes optimally (also for gears with number of teeth = 12.5 no material remains in the sealing chamber).
•Self-cleaning of the sealing chamber.
•No risk of destruction by material deposits on the lower belt.
For additional information, please contact Mr. Norbert Kleinerüschkamp.
For more information, please visit:
https://edir.bulk-online.com/profile/10071-sgv-i.htm10071 sgv i.htm
http://www.google.com/search?client=...UTF-8&oe=UTF-8search?client=safari&rls=de de&q=SGV I++site:bulk online.com&ie=UTF 8&oe=UTF 8
Fig. 1: Longitudinal and cross-section
Fig. 2: Modules: 1 Belt pan; 2 Roller with bracket; 3 Chain
Fig. 3: Chain pivot point
Fig. 4: Force distribution
Fig. 5.1: Chain pivot point - Swivel angle 24°
Fig. 5.2: Chain pivot point - Swivel angle 48°
Fig. 5.3: Chain pivot point - Swivel angle 34°
Fig. 5.4: Chain pivot point - Swivel angle 29°
Fig. 6: Photo of the apron style steel pan conveyor system SZB 250
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