Multi-frequency vibrator for concrete

Abstract

The invention discloses a multi-frequency vibrator for concrete. The multi-frequency vibrator comprises a vibrator shell, wherein a plurality of groups of bidirectional vibration electromagnets with different vibration frequencies are arranged in the vibrator shell; each group of bidirectional vibration electromagnets comprise two bidirectional vibration electromagnets, of which two ends are vertical to the wall of the vibrator shell, and the two bidirectional vibration electromagnets in each group are vertical to each other on different horizontal planes; and the bidirectional vibration electromagnets are all connected with a power supply through a control circuit for generating different pulse signals. According to the invention, the vibrator can continuously work under a single frequency according to a mode of high frequency, middle frequency or low frequency or work under a mixed frequency according to a mode of mixing various frequencies, and the frequency of the vibrator can be changed in a certain range, so that the work frequency of each bidirectional vibration electromagnet is close to or the same as the self-vibration frequency of a concrete aggregate; and the vibrator can generate vibration forces with different vibration frequency combinations and different degrees in different directions so as to enhance the vibration effect and improve the concrete compactness.

Description

technical field [0001] The invention relates to a vibrator, in particular to a concrete multi-frequency vibrator. Background technique [0002] Concrete is a building material widely used in the construction industry. Since the concrete contains a lot of gas and water after mixing, in order to make the concrete reach its design strength, its compactness must be ensured. The concrete vibrator is a kind of concrete vibrator used in concrete construction. Equipment for improving the compactness of concrete. At present, the vibrator driven by the motor is commonly used in the construction industry. It uses the AC power to drive the motor to rotate periodically, so that the concrete vibrating rod can generate periodic vibrating force to work, and its work form is a stable rotational torque. What vibration requires is a non-uniform periodic motion, so the existing vibrator cannot efficiently convert electrical energy into vibrating force, so the work efficiency is low. In additi...

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Problems solved by technology

The invention patent "A Plug-in Electromagnetic Vibrator" with the publication number CN2353829 and the "An Electromagnetic Vibrator" with the publication number CN2570378 respectively propose a vibrator and a vibrator that work on the electromagnetic principle, but Since the above two patents also use the periodic principle of alternating current to drive the electromagnet to work, the vibrating frequency of the concrete vibrator cannot be close to the natural vibration frequency of the different concrete aggregates, so the compactness of the concrete cannot be improved.

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