The hydraulic support is a structure used to control the mine pressure on the coal mining face and is an indispensable device in the mine. Due to the backward industrial production level, most of the hydraulic supports produced in China are mainly manual manual control. Although the manually controlled hydraulic supports are low in manufacturing cost and easy to operate, they move slowly and have low production efficiency; and because of the poor working environment underground, they are easy to occur Security incident. In recent years, as industrial automation control technology has become more mature and the country's urgent need for coal mine safety production situation has gradually increased the automation of mining technology equipment, more and more hydraulic support manufacturers have begun to increase investment in electro-hydraulic control systems. .
The hydraulic support electro-hydraulic control system is a system with single-chip computers, sensors and other electronic devices and hydraulic circuit control components, which can control the automatic action of the hydraulic support according to production needs. The sensor part is mainly a pressure sensor and an inclination sensor. The pressure sensor is used to detect the pressure value of the front and rear pillars and the front extension beam of the hydraulic support; the common requirements of the hydraulic support electro-hydraulic control system for the pressure sensor are: pressure measurement range: 0 ~ 60MPa, more than 2 times the overpressure capacity; The sensor is required to have a small temperature error and good frequency characteristics, and a fast response speed, so as to accurately measure the pressure change state and achieve accurate control of the hydraulic support.
It can be seen that the automatic control system of the hydraulic support is inseparable from the use of pressure sensors. Under the action of the pressure sensor, the hydraulic support automatic control system can not only automatically control the action of the hydraulic support, but also control the adjacent frame or remotely control the hydraulic support, thus providing the possibility of realizing the unmanned working face underground. The two pressure sensors provided by Shenzhen Gongmo.com are very suitable for use in pressure sensors in hydraulic supports of coal mining machinery. They are pressure sensor MEAS-P9000 and stainless steel pressure sensor MEAS-89CV. Let ’s take a look.
The pressure sensor MEAS-P9000 adopts reliable strain gauge technology and digital compensation, and its performance reaches the instrument level. Pressure ranges from 75psi to 10,000psi (5bar to 700bar). To meet most pressure measurement needs, MEAS-P9000 series products provide a variety of pressure ports, electrical outputs and electrical interfaces. Used in power stations, offshore oil exploration, papermaking and other industries.
Stainless steel pressure sensor MEAS-89CV, this pressure sensor is characterized by a small volume, designed for OEM applications that require compatible corrosive media. -40 ° to 125 ° wide temperature working range, constant pressure characteristics 5 / 16-32 UNEF thread, can be welded in place. It can be packaged into 1/4, 1 / 8NPT of various threaded fittings, accessories and customized. The same can be applied to hydraulic control, process control, pressure calibrator refrigeration / compressor.
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