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Needle and Concrete Vibrator

We are a leading Manufacturer of high frequency motors, external vibrator, high frequency needle vibrator, concrete vibrator, frequency converters and static converters from Delhi, India.
High Frequency Motors

High Frequency Motors

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THE VIBRATION CONTRIBUTES TO:
• The surfacing of the air trapped in the concrete;
• The displacement of aggregates, aligning them with one each other, with consequent reduction of cavities, conferring them high density and perfect homogeneity;
• The adhesion of the concrete to the bars of the reinforcement armatures or to any internal structural inserts, as well as to the basic anchorages. BENEFITS:
• High mechanical resistance.
• Low porosity and thus low permeability to water and to aggressive substances contained therein.
• Absence of cracks within the concrete in the proximity of the reinforcement armatures’ bars.
• Complete filling of the formwork.
• Increase in the life cycle of the concrete.
• High aesthetic result.


Frequency and Voltage Converters consist of an electric motor coupled to a permanent magnet generator that reduces the single-phase (230 V, 1 ph) or three-phase (400 V, 3 ph) input voltage into one lower than 50 V increasing the frequency to 200 Hz, necessary for correct operation of electric internal vibrators, thus ensuring operator safety as occurs with low voltage equipment.
Converters are suitable for continuous duty.
With multi-socket models a maximum of four multiple high frequency concrete vibrators can be connected simultaneously, as long as total power consumption does not exceed the rated current of the converter.
To facilitate the manoeuverability, depending on the model, a handle or a grip frame with coupling or wheels is provided.
 
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External Vibrator

External Vibrator

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Flexible and easy-to-use vibrating systems are required whenever there is the construction of industrial floors, walls, columns, slabs, etc. In such cases high-frequency immersion vibrators are generally used, known as “poker” or simply “vibrating needles”. They come into direct contact with the concrete; for this reason, we speak of internal direct vibration.
An eccentric mass is housed inside the vibrating head (or needle) which is fixed to a rotating shaft powered by a three-phase asynchronous AC motor. During rotation, the eccentricit y of the mass generates rotational movements to the vibrating head. The robustness and the constant rotation speed are essential factors in the compaction of the concrete: drop in the speed and centrifugal force heavily reduce the quality of the manufactured article. The VH is a robust and reliable product, which is suitable for compacting the concrete and it is appropriate for continuous operation.
Important: The VH has to be operated by electric or electronic converters that convert the 50/60 Hz main frequencies to 200 Hz. This is necessary for the vibrating head in order to reach a vibration speed of 12,000 vpm, as it is ideal for the proper compaction.
INTERNAL VIBRATORS WITH BUILT-IN CONVERTER On construction sites, during the consolidation of the concrete, a light, flexible and easy-to-use tool is often required, which can be connected directly to the common single-phase power lines (230 or 110 Volt, 50/60 Hz). The solution to fulfil this need is the EWO range: high-frequency immersion vibrators equipped with an integrated electronic frequenc y converter capable of transforming the singlephase input voltage (230V or 110V, 50/60 Hz) into the three-phase voltage (230 V, 200 Hz) necessary to obtain 12,000 vpm. Compared to the common vibrating needles powered by electromechanical converters, the EWO vibrators have several advantages:
• they are light and flexible;
• the constant output frequency maintains the maximum centrifugal force and thus a high and consistent performance;
• there is a protection against short circuits, excessive temperature, overvoltage and overcurrent above or below the nominal values.

EXTERNAL ELECTRIC VIBRATORS RELIABLE High frequencyelec tric vibrator sare used in construction sites and in precast manufacturing plants to obtain high-quality products (exposed concrete), with excellent aesthetic results and weather resistance. The vibration is transmitted to the concrete indirectly through formworks or mould. Just like the internal vibrators, the external ones are also based on the principle of the vibration produced by the rotation of an eccentric mass powered by a three phase electric motor. Low speed vibration (3,000 rpm) is used on high-density and unreactive concretes mostly, as they allow a fast displacement of the aggregates. H i g h s p e e d v i b r a t i o n (6 , 0 0 0 o r 9, 0 0 0 r p m) i s recommended with low-density concretes and in applications where high surface quality is required. The possibility to adjust both the frequency and the speed (from 0 up to 9,000 rpm) guarantees the achievement of the perfect operational frequency.
It depends on the type of concrete to vibrate as well as the natural resonant frequency of the mould.
The OLI external electric vibrators are characterised by high operating efficiency and ease of installation. Specially designed attachment devices (quick-coupling clamps) reduce the time required for installing and repositioning. This vibration system is recommended when: • High construction elements and narrow walls (partitions, columns, beams) have to be compacted, which are difficult to vibrate with other systems.
• The reinforcement density inside the housing is high
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High Frequency Needle Vibrator

High Frequency Needle Vibrator

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Product Brochure

 Electric High Frequency Internal Vibrators (standard range) consist of a tractor unit called vibrator head, 10 metres of electric cable and of 5 metres internally reinforced operating hose.
The high centrifugal force is generated by a high frequency electric motor integrated in the vibrator head.
Vibrators are equipped with a key pad (IP 66 protection) in polyamide, complete with switch protected by a reinforced gasket resistant to continuous use and wear.
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Concrete Vibrator

Concrete Vibrator

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Benefits
  • No overheating
  • Durable vibrator head
  • Waterproof
  • Easy maintenance
  • High reliability
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Frequency Converters

Frequency Converters

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Product Brochure

FREQUENCY AND VOLTAGE CONVERTERS » No overheating » No maintenance » Optimal cooling » Easy cleaning LONG LIFE OPTIMUM COOLING The internal vibrating needles need to be powered via a three-phase electric line at low voltage and high frequency, therefore it is necessary to use a voltage and frequency converter. The electromechanical rotary converters consist of a motor and a generator, which are coupled together. The motor converts the electrical energy into mechanical energy; the generator converts the mechanical energy into electrical energy, thus generating the required voltage and frequency (42 Volt - 200 Hz). The converters of the CM range are designed to supply simultaneously and in a continuous cycle one or more high-frequency internal vibrators; they are reliable, durable and do not require maintenance. The minimal design and the materials used facilitate the external cleaning, while the special internal air ducting system avoids overheating. The range comprises several models, which are capable of supplying from 1 to 4 immersion vibrators.
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Static Converters

Static Converters

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Electric Converter

Electric Converter

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