Energy-saving protection controller of mine explosion-proof emulsion system

Abstract

The invention relates to an energy-saving protection controller of a mine explosion-proof emulsion system. The energy-saving protection controller of the mine explosion-proof emulsion system comprisesa box. A main cavity and an intrinsically safe cavity are arrange inside the box, a PLC and an explosion-proof emulsion control system are arrange in the main cavity, a display screen and an operation button are arranged on the PLC, the explosion-proof emulsion control system is in signal connection with the PLC, the explosion-proof emulsion control system comprises a pressure sensor, the intrinsically safe cavity is internally provided with an input and output signal line, one side of the box is provided with a sampling pipe, one end of the sampling pipe is provided with a quick connection interface, and the sampling pipe is connected with the pressure sensor of the explosion-proof emulsion control system and used for detecting the fluid pressure in the sampling pipe. The controller cannot only automatically stop a liquid pump when the system is in no-load operation and the components are damaged when the rated pressure is exceeded, but also can automatically stop the machine and close pipeline valves when the emulsion leaks, and the leakage of the emulsion is reduced.

Description

technical field [0001] The invention relates to mining equipment, in particular to a mine explosion-proof emulsion system energy-saving protection controller. Background technique [0002] There are many pipelines, components and interfaces in the hydraulic system of the hydraulic support of the coal mine fully mechanized mining face. The concentrated liquid (also called emulsified oil) and water ratio of 3-5% for the coal mine hydraulic support is used as the emulsion, which is used as the transmission of system pressure. medium. Due to the high operating pressure of the system (the rated nominal pressure is 31.5 MPa) and the large flow rate (the nominal flow rate reaches 400 liters / minute), the system pressure pump—the emulsion pump only has mechanical unloading and mechanical safety protection when it is designed and matched by the manufacturer. , there is no electrical protection and automatic shutdown protection function, especially when there is no shutdown protection...

AI Technical Summary

Problems solved by technology

Due to the high operating pressure of the system (the rated nominal pressure is 31.5 MPa) and the large flow rate (the nominal flow rate reaches 400 liters / minute), the system pressure pump—the emulsion pump only has mechanical unloading and mechanical safety protection when it is designed and matched by the manufacturer. , there is no electrical protection and automatic shutdown protection function, especially when there is no shutdown protection when the transfer medium leaks, the following problems often occur during the operation of the emulsion pump: First, the system pressure cannot be unloaded after the unloading component-the unloading valve fails. After the system pressure rises and exceeds the safe operating pressure of the system, the pipeline bursts, the seal of the components is damaged, and the system runs paralyzed, etc. Serious problems; the second is that due to the aging of the pipeline and seal, the system pipeline ruptures and the interface seal is damaged, only by man-made Judging by intermittently looking at the pressure gauge and listening to the sound of the pump station, the emulsion pump cannot be detected and stopped in time, and the following secondary problems occur: first, a large amount of emulsion leaks, resulting in a serious waste of concentrated liquid-emulsified oil; After the emulsion in the emulsion tank is pumped out, the liquid pump runs without load for a long time, which damages the pump components; third, it takes a certain amount of time to refill the liquid tank again, which affects the operating rate of the equipment; When operating hydraulic supports, delays in processing time lead to secondary accidents

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