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Concrete vibrators are used to remove air pockets that can weaken concrete. Concrete structures can break apart or cave in without a concrete vibrator.
Poker vibrators, also known as concrete vibrators, are essential tools in the construction industry, particularly for concrete consolidation. These devices consist of small steel cylinders, usually with a diameter ranging from one to several inches, attached to a long electrical cord. The steel cylinder is the vibrating element that, when inserted into wet concrete, helps to compact and consolidate it.
Poker vibrators are high frequency units for effective consolidation of concrete.
The pokers incorporate the pendulum design principle of low rotation speed of the flexible shaft and high frequency in the vibrator tube, providing a high vibration output at low service and maintenance cost. Highest quality is guaranteed as latest technologies, precision CNC engineering, metallurgical treatment methods and stringent quality control are exercised during manufacture.
All exposed steel components are tempered.
The vibrator tube and end cap are manufactured from specially tempered steel allowing highest resistance to wear.
The flexible transmission shaft rotates at 2900rpm.
The “EWO” high frequency immersion vibrators are equipped with a small electronic frequency converter, integrated in the power cable. This makes them suitable for being connected directly to a single-phase power outlet (115 V, 230 V, 50/60 Hz).
The range of EWO concrete pokers is characterized by a high centrifugal force, constant speed and greater resistance to wear, which makes it suitable even for the most consistent types of concrete and for continuous use.
The shaft is supported by four bearings for working in harsh conditions.
The VHA range of pneumatic needles is designed to provide high operating frequency with high working efficiency under safe conditions.
Ease-of-use and maintenance-free make the VHA the perfect solution for compacting concrete when electricity is not available.
The VHA range is ideal for every type of compaction: from lab tests to heavy infrastructure projects.
As a pneumatic vibrator, VHA doesn’t need electricity and can even work out of concrete without overheating. This means no work interruptions even in severe conditions.
The working principle of a poker vibrator involves generating high-frequency vibrations. This vibration is created by an electric motor inside the cylinder. When the vibrator is inserted into wet concrete, the vibrations cause the concrete mix to fluidify, allowing air bubbles trapped within to rise to the surface. This process significantly improves the strength and integrity of the concrete by eliminating air pockets and ensuring a more uniform and dense concrete mix.
Poker vibrators are typically used in conjunction with a drive unit, which powers the electric motor inside the vibrator. The drive unit can be electric, pneumatic, or petrol-powered, depending on the model and requirements of the construction site. The flexibility of the electrical cord and the length of the vibrator allow for easy maneuverability, making it possible to reach different areas within the concrete pour.
Their use is crucial in construction projects where durable and robust concrete is essential, such as in foundations, beams, columns, and slabs. The effectiveness of poker vibrators in removing air bubbles and ensuring homogeneity in the concrete mix makes them an indispensable tool for achieving high-quality concrete construction.
