Hydraulic Internal Vibrators for Big Dams
VH-15 SERIE.
VH-15 Internal Hydraulic Vibrator Installation
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Groups are installed on a beam where 1, 2, 3, 4, 6 or 8 vibrators can be set, allowing at the same time an independent oscillatory movement for every single vibrator, which may spare an eventual breaking of the structure due to bumps or to unwanted drivings; protected with the double cushioning that exists between the vibrator and the machine.
This system is provided with a double cardan and offers a harder resistance to bumps.
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The vibrators disposal will depend on the quantity as well as the work to be done.
Optionally, there is the possibility of installing a turning system (registered), which enables a +/-90º turning of the whole set of vibrators, at a speed of half a turn in 2 seconds, offering complete manoeuvrability. Tunnels or remote places can be reached, reducing movements of the machine and improving considerably the efficiency of the vibrated concrete. The operator in the cab easily controls this turning
The distance between vibrators is determined depending on the reology of the concrete, just in the same way that the number of vibrators is adjusted to the production of concrete required. The standard version provides vibrators at a distance of 800 mm. between each other. Optionally, there is the possibility of fitting the machine with a system which allows regulating the distance between vibrators.
A different version from the standard installation makes possible installing the vibrators in a bridge-crane or retro-machine, with rigid tube, for the vibrating of casts.
VH-15 Hydraulic Vibrators Installations.
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Machine
Type |
HITACHI
EX 50 UR |
PEL-JOB
EB-506 |
O & K
RH 2.8 C |
CASE
688-CKB |
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Power
Engine |
25,7 kW (35 cv)
at 2500 rpm |
32,2 kW (44 cv)
at 2500 rpm |
40 kW (55 cv)
at 2150 rpm |
65 kW (88 cv)
at 2000 rpm |
|
Hydraulic power |
- |
- |
35 kW (48 cv) |
55,6 kW (75 cv) |
|
Flow |
60 l/min |
75 l/min |
2 x 71 l/min |
210 + 44 l/min |
|
Working
pressure |
210 bar |
250 bar |
280 bar |
350 bar |
|
Hydraulic tank capacity |
86 l |
- |
- |
115 l |
|
Circuit total capacity |
120 l |
106 l |
150 l |
184 l |
|
Number of vibrators |
2 |
3 |
4 |
6 |
|
Complete
installation weight |
235 kg |
320 kg |
610 kg |
770 kg |
The chosen machine characteristics have to be similar to the ones indicated in this list, for the VH-15 vibrators installation.
The power left for the machines (arm and handle actionning), is as follows:
- HITACHI EX 50 UR: 10,7 kW = 25,7 - 2x7,5
- PEL-JOB EB-506: 9,7 kW = 32,2 - 3x7,5
- O&K RH 2.8 C: 10 kW = 40,0 - 4x7,5
- CASE 688-CKB: 20 kW = 65,0 - 6x7,5
Vibrators installations in used machines
Eventually, the VH-15 hydraulic vibrators installation can be undertaken on used machines.
In this case, it is mandatory to achieve a serious revision in the machine for the pump, the hydraulic circuit, as well as the machine engine work in perfect conditions.
Otherwise, the installation could not be done.
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