English
عربىworking principle
The working principle of the electromagnetic vibrator: There is an electromagnetic coil in the electromagnetic vibrator, and the current passing through the electromagnetic coil is a pulse current that has been half-wave rectified. In the positive half-wave, the current passes through, the electromagnet has suction, attracting the vibrating plate to approach; in the negative half-wave, no current passes, the electromagnet suction disappears, and the vibrating plate returns to its original position due to the action of the spring, while the The coal trough is connected with the vibrating plate, so that under the action of the electromagnetic vibrator, the vibrating equipment vibrates continuously.
(1) The role of the concrete vibrator.
When the concrete is poured with a concrete mixer, the air bubbles must be removed, and the concrete must be tamped to make the concrete densely combined and eliminate the honeycomb pitted surface of the concrete, so as to improve its strength and ensure the quality of the concrete components. A concrete vibrator is a device that generates frequent vibrations through a certain device as a vibration source with the help of power, and transmits this vibration to the concrete to concrete vibrator poker vibrate and compact the concrete.
(2) Classification of concrete vibrators.
There are many types of concrete vibrators. According to the way of transmitting vibration, it is divided into three types: internal vibrator, external vibrator and surface vibrator; according to the power source of the vibrator, it is divided into three types: electric type, internal combustion type and pneumatic type, and the electric type is the most widely used; The vibration frequency of the vibrator is divided into three types: low frequency type, medium frequency type and high frequency type; according to the principle of vibration generated by the vibrator, it is divided into eccentric type and planetary type.
Concrete internal vibrator.
1) Scope of application. The concrete internal vibrator is suitable for all kinds of concrete construction, and can be applied to plastic, flat plastic, dry-hard, semi-dry-hard and concrete tamping with or without reinforcement.
2) Classification. Concrete internal vibrators are mainly used for concrete vibrating equipment in beams, columns, and steel reinforcement areas. The commonly used internal vibrators are electric flexible shaft insertion vibrators.
Concrete Surface Vibrator.
There are many kinds of concrete surface vibrators, among which the most commonly used is the plate type surface vibrator. The plate type surface vibrator is placed directly on the concrete surface, and the vibration wave generated by the vibrator is transmitted to the concrete through the vibrating base plate fixed to it. Since the vibration wave is transmitted from the concrete surface, it is called a surface vibrator. When working, two people hold the handle of the vibrator and drag it according to the needs of the work. It is suitable for large area and small thickness concrete, such as concrete prefabricated building slab, pavement, bridge deck, etc.
skills requirement
The main technical requirements of the vibrator are: (1) vibration speed; (2) vibration displacement; (3) excitation force; (4) vibration acceleration; (5) working mode; (6) working life; (7) volume and weight.
The production process of the electric vibrator is simple, the manufacturing cost is low, and the price is lower than that of the pneumatic vibrator. When using it, it only needs to be connected to the power supply, plug and play, and there is no air source reserve process for pneumatic vibrators.
However, due to the particularity of the structure of the electric vibrator itself, its service life is much shorter than that of ordinary motors. The following defects are the reasons for burning, such as: phase loss, overload, overcurrent, high temperature, dust, short circuit, Leakage and other faults will cause the electric vibrator to burn, causing losses, affecting production and causing safety accidents.
