A sand mixer automatic control device, which is composed of the mixture density control device, a dry powder additive control device, a liquid additive control device and a mixed liquid discharge pressure control device to form a mixture density control device is composed of a micro computer, proportional amplifier, power density of hydraulic servo valve, meter, turbine flowmeter, flow sensor, speed sensor variable hydraulic pump, motor, quantitative conveyer; dry powder additive control device by the micro computer, sensor, amplifier, proportional flow control valve, pump motor, quantitative dry powder additive device; liquid additive control device is composed of a micro computer, proportional amplifier, variable hydraulic pump, motor, pump, quantitative liquid additive, turbine flowmeter sensor mixed liquid; discharge pressure automatic control device comprises a pressure sensor, amplifier, power ratio Composition of hydraulic servo valve, hydraulic motor, variable displacement pump, flow sensor, flowmeter; which is characterized in that the turbine flowmeter A and sensor C together connecting flange installed in the mixing tank inlet pipe through the sensor B is fixed in the inner side of the upper end of the housing and the conveyer conveyer auger shaft corresponding with the bolt. The output end of B sensor by wire and micro computer signal input interface is connected with the input end of the B quantitative motor hydraulic hose and variable hydraulic pump connected with B, which is connected with output end through the connecting sleeve and the screw conveyer and conveyer outlet through a mounting bracket fixed on the mixing tank above the variable hydraulic pump B input and power hydraulic servo valve a assembled together, the input of the a electro-hydraulic servo valve end a connector terminal connected by wires and proportional amplifier, the input end of the proportional amplifier A Output interface wire and micro computer connection; dry powder additive pump installed in the mixing tank above the bracket, the input shaft sensor a are arranged in a dry powder additive pump, a is connected with the output of the sensor signal input through the wire and micro computer terminal, the input shaft of the pump through the connecting sleeve of dry powder additive and quantitative motor a output end connection, quantitative motor a input terminal is connected with the output end of the hydraulic proportional flow control valve a hose, proportional flow control valve and the a input end of the amplifier output end of the B ratio of wire connection, the signal input terminal of the proportion of input amplifier B end through the wire and micro computer connected to the liquid additive output; the mouth of the pipe is fixed on the upper bracket through the mixing tank, turbine flowmeter, B D sensor installed in the mixing tank and the liquid liquid inlet pipe The additive output pipeline, the output of the sensor is connected with the d end of the micro computer wire input end of turbine flowmeter and turbine flowmeter B through the B connection, the output pipeline and liquid additive pump is connected with the input end of the pump, the liquid additive by connecting the guide sleeve and the quantitative motor C is connected to the output end of the motor input through quantitative C hydraulic hose and proportional flow control valve is connected with the output of B, proportional flow control valve B input connected to end signal output by proportional amplifier C wire terminal, C proportional amplifier signal input through the wire and micro computer connected with the signal output end; the pressure sensor is arranged in the mixing liquid discharge pipe, the output end the signal input terminal through the wire and micro computer connection, liquid discharge pump valve is connected with the input port through the LAN mixing tank, through the soft output The fracturing pipe is connected with the input interface, liquid discharge pump through a connecting flange and quantitative motor C connected to the output end of the motor, quantitative C input end is connected through a hydraulic hose and hydraulic pump output variables C, C variable hydraulic pump and the input side of the electro-hydraulic servo valve B assembled together....
【技术实现步骤摘要】
【国外来华专利技术】
本技术涉及一种混砂车自动控制装置,属于油田压裂设备自动控制装置领域。
技术介绍
混砂车在进行压裂作业时,必须根据压裂作业的工艺参数控制输入混砂车混合罐的液体添加剂及干添加剂的输入量,控制经混合罐混合后排出的混合液密度和压力。目前,液体添加剂控制方式是液体添加剂泵将液体添加剂经流量计输送到混合罐内,流量计将输送的流量显示在操纵台上,根据所显示的流量,由人工手动调节液体添加剂泵的速度来控制它的流量,使液体添加剂量达到所要求值;干添加剂的控制方式是预先设定干添加剂输出绞笼的速度来控制其加入量,但不能测定实际排出量并反馈信息;密度控制的方式是输砂器将砂子输送到混合罐内与供液泵所输入的压裂液经搅拌器充分搅拌后,由排出砂泵经密度计排出至压裂车。密度计将排出液的密度显示在操纵台上,根据所显示的密度,手动调节输砂器的速度以控制输砂量,从而使混合液的密度达到所要求值;混合罐排出压力的控制方式是在混合罐排出管汇处安装压力测量表,在操作面板上显示所测压力值,通过人工操作控制混合罐排出压力的大小。因此,混砂车的混合液密度、液体添加剂流量和排出压力都是用肉眼观察显示数据后进行手动调节,经常出现操作滞后,混合液的密度过大或过小、液体添加剂流量过多或过少和压力不稳定等现象,加上干粉添加剂的加入量不能测量,直接影响了压裂作业的质量和可靠性。同时操作人员作业时精神紧张,劳动强度大,易发生事故。
技术实现思路
本技术的目的在于提供一种自动控制液体添加剂流量、混合液密度、干添加剂量和混合液排出压力的装置,有效控制混砂车压裂作业的主要工艺参数,提高压裂作业的质量与可靠性,避免发生作业事故的混砂车自 ...
【技术保护点】
【技术特征摘要】
【国外来华专利技术】
【专利技术属性】
技术研发人员:张宝弟,乔春,唐华,吴汉川,
申请(专利权)人:中国石化集团江汉石油管理局第四机械厂,
类型:实用新型
国别省市:
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