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Figure 2: The area around the hopper on the 16HLS concrete pump
Cover in the new design
Group: 07 Hopper unit
KS 912256
NP 10689 Author Dipl.-Ing.M.Fritz
Written in accordance with Porga 970806
Confidential. For Putzmeister internal use only
Date revised 00-01/05
Table of contents
1. Description The first section describes the basic features of
the hopper. The second section describes the hopper models and
associated assemblies available.
1.1 Development objectives This hopper model was developed with
the aim of facilitating access to the hopper region and handling
during servicing, such as to facilitate the replacement of wear
parts in the hopper, for example. A previous weakness on our
machines was the relatively limited space between the loading
hopper and the truck. This was previously a focal point for
criticism of our machines and was considered to be placing us at a
disadvantage in relation to our competitors. By introducing an
easy-to-assemble system, it has been possible to reduce the time
and costs of servicing and when replacing components in the hopper
such as S transfer tubes or wear parts. In addition, it was also
possible to reduce the weight of the concrete pump by introducing
plastics as a manufacturing material.
1.2 Features Figure 2 shows a 16 HLS pump by way of example. A
general feature of this RS907 L hopper series is the S2318 S
transfer tube with its larger intake diameter in relation to the
S2018 S transfer tube and the general introduction of the 90 mm
diameter S transfer tube bearing.
RS 907 L hopper
Figure 1: Hopper
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For the bearing, this means a reduced specific load on the teeth
and in the bearing housing. The result is a longer service
life.
1.3 Overview of the variants The RS907L hopper is manufactured
from one base part for three different connection diameters. Figure
3 shows the manufacturing structure with a planning stage and
scheduling stage. The subcontractor takes the planned or base
hopper and prepares it according to its later use, welding on the
crossbeam for the various delivery cylinders, for example.
Figure 3: Manufacturing and scheduling structure for the various
hopper applications
Planning stage for materials
Purchasing stage
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1.4 Current further developments In the future, a conical S
transfer tube shaft bearing will be introduced for this hopper.
This bearing is already in use by Putzmeister Systems Engineering.
Furthermore, the hopper extension is produced by injection moulding
PUR material into which the cradle supports for the grille are
made. This will then mean that the two steel round rods in the
hopper are no longer necessary. See figure 4.
Figure 4: Grille with plastic and steel tube as grille
support
2. Features and function description The plastic and rubber
material components on the machine are kept black, as can be seen
in figure 5. They match the different paint finishes of the
vehicles. The rubber collar, hopper extension and also the water
tank with its side-mounted lance holders are the components
referred to here.
Figure 5: Assembled and painted machine
Hopper cover in new design Plastic water tank Plastic hopper
extension Rubber collars
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2.1 Common basic features of the RS 907 L hopper series
Figure 6: Hopper unit A hopper unit is composed of the following
subgroups: a. Basic hopper b. S transfer tube with bearing and set
of wear parts c. Grille, optionally with vibrator d. Spray guard
with folding lid and removable extension e. Hinged elbow or
pressure connection f. Agitator g. S transfer tube switchover h.
Steps can be supplied as an option
The hopper is divided: the extension is removable: See function
description.
The grille is made from wear-resistant steel. It is mounted
externally and therefore away from the concrete. The long-requested
integrated vibrator cabling was also added at this point.
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2.2 Function description The following describes the method of
operation for the RS907L hopper and the procedure for dismantling
the hopper extension. The hopper extension is made of plastic, and
sits on the steel hopper and is then screwed down.
The six screws on the sides and at the rear must be loosened.
The connecting bolt for the extension hopper rubber collar must
also be removed. The hopper extension can now be removed. Since the
weight of this spray guard unit is m = 35 kg, it may only be
removed with one person on the left and another on the right-hand
side. When subsequently assembling the hopper, it must be ensured
that the seal cord and also the flange face are free from dirt or
concrete residue in order to achieve a flawless seal. The seal cord
must be greased. Figure 7: The RS907L hopper
Figure 8: Removing the hopper extension complete with lid
The hopper extension is removed. Folding up the grille as normal
produces a larger opening than before, and it is through this
larger opening that the access to the switch lever and bearing
region, for example, is significantly improved. Figure 9: Hopper
with the hopper extension removed
Schrauben lsen
undo screws
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3. Hopper applications and modular system
3.1 Hopper applications and modules
Figure 11: Hopper unit module
Hopper extension with the option of plastic or steel
Outlet on hopper with 230 diameter delivery cylinder: up to
p=130 bar with
pressure connection up to p=85 bar with
hinged elbow
Hopper variants: for 230 diameter versions (a BSF 16H pump) for
250 diameter versions (a BSF 11/16HLS pump) for 280 diameter
versions (a BSF 20H pump) Delivery cylinder
Outlet on hopper with 250 diameter delivery cylinder: up to
maximum p=85
bar and only with hinged elbow
Set of wear parts Available in qualities DURO 22 or hard
metal
S transfer tube: Option of S2318L or S2318V with clamped shaft.
Always with 90 series shaft
Outlet on hopper with 280 diameter delivery cylinder: up to
maximum p=85
bar and only with hinged elbow
S transfer tube: switch cylinder with 160mm stroke and 60mm
diameter or 80mm diameter possible.
Conventional aluminium cover
New plastic cover option
Spray guard
Core pump
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3.2 Hopper comparison for 16H LS/16H concrete pump 230 diameter
delivery cylinders
RS907L RS905A Average gross weight 930 kg Average gross weight
870 kg Installable S2318 S transfer tube Installable S2018 S
transfer tube Further applications for S2015D with hinged or
pivoting elbow
Figure 12: Table of hopper comparisons
3.3 Delivery cylinder - intermediate ring transition The
sectional views for the RS907L and RS905A hoppers illustrate the
tapering and interchangeability of the intermediate rings. RS907L
hoppers with 230 mm diameter delivery cylinders
RS907L hoppers with 250 and 280 mm diameter delivery
cylinders
RS905A hoppers with 230 mm diameter delivery cylinders
Fitting and removal of the intermediate rings from inside
Fitting and removal of the intermediate rings from inside
Fitting and removal of the intermediate rings from outside
Figure 13: Fitting and removal of the intermediate rings