Before using the frequency converter, pipe pile machines generally adopt electromagnetic motor speed control or DC motor speed control. Because electromagnetic motor speed regulation accuracy is not high, the speed range is limited, some can not be achieved when high speed is needed.
Inverter is a kind of electronic speed control device with very high degree of automation. It has wide speed range, stable speed, high precision, can realize automatic control, and is easy to operate. It has become an unmatched product of other speed control devices and is widely used. In all walks of life.
Before using the frequency converter, pipe pile machines generally adopt electromagnetic motor speed control or DC motor speed control. Because electromagnetic motor speed regulation accuracy is not high, the speed range is limited, some can not be achieved when high speed is needed. Moreover, due to the different speeds and times required to run the pipe pile production process, the operator can only manually adjust the speed and use the stopwatch to calculate the running time at different speeds. In this way, the labor intensity of the operating workers is extremely high, and the production efficiency is also very low. If workers do not concentrate their energy, they may also cause the pipe piles to be scrapped, causing huge losses to the factory.
In accordance with the characteristics of pipe pile production, Sanjing Electric tailor-made for a variety of pipe pile machine inverter, it has a large starting torque, can automatically run without the need for human operation of pipe pile centrifuge control device for the present The transformation of the pile-driving machine, which is still using slip speed, provides a convenient condition. Three crystals frequency conversion uses the built-in PLC, can carry on the precise control to each frequency section time, the operation establishment is extremely convenient, it can set the parameter according to the pipe pile size and the movement request, for example: This apparatus according to the production tube pile size different size There are four types of pipe pile operating modes, each of which can be set to seven different operating frequencies and operating times. The operating frequency and time can be arbitrarily set according to the size of the production pipe pile, raw materials and other process requirements, greatly improving the production efficiency, has a very good energy-saving effect, reduce the labor intensity of the operating workers, and the majority of users of the pipe pile machine. Good*. Pipe piles used in the construction industry are used more and more widely. As a pipe pile machine producing pipe piles, due to the requirements of the production process, the motor needs to be speed-regulated. At different times, running different speeds and running different times to ensure the product quality of pipe piles puts high demands on the operation of the equipment.
In the main circuit of the frequency converter, the rectifier circuit AC/DC or the inverter circuit DC/AC must generate harmonics, which has a certain impact on the grid and the motor. Now that the electronic technology is continuously maturing, the effects of various harmonics can all be controlled within a certain range using corresponding methods. The measures adopted are as follows: The selection of quality indicators is good. China has harmonic indicators for inverter products; for voltage components: THD5; for current components: THD3. Devices that suppress harmonics are added. For example, AC reactors, DC reactors, output reactors, input output filters, magnetic loop-free sequence reactances, and signal filters are used. There are strict requirements and methods for installation location, distance, shielding, and isolation.
Polypropylene fiber by polypropylene and a variety of organic and inorganic materials, refined by special composite technology, products can be formed in the concrete three-dimensional supporting role to the distribution of the mesh, the micro cracks formed at the beginning of the hardening concrete was blocked in the process of development, to develop further. Thus, it can improve the fracture toughness of concrete and improve the anti-seepage properties of concrete. It is a new ideal material for mortar, concrete engineering, anti-cracking, anti-seepage, wear-resisting and heat preservation.
The anti-cracking ability of the non-structural crack in the plastic stage of concrete is improved.
It is a kind of effective rigid self-waterproofing material.
The range of noil is 0.6-1.8 kg/m3, and the concrete anti-cracking anti-seepage is usually 0.9kg/m3.
Main functions: to prevent concrete cracks, improve the permeability resistance of concrete, improve the freezing-thawing resisting performance of concrete, improve the impact resistance of concrete, folding resistance, fatigue resistance, seismic performance, improve the durability of concrete, aging resistance, improve the fireproof performance of concrete.
Fiber Concrete,Mortar Fibre,Crack Resistant Fiber Concrete,Crack Resistant Mortar Fibre
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