Backpressure-free liquid return system and high-flow plunger pump

Abstract

The invention relates to the field of coal mining, and particularly relates to a backpressure-free liquid return system and a high-flow plunger pump. The backpressure-free liquid return system comprises a liquid return box, a liquid return pipe and a power device, wherein the liquid return box is arranged at a liquid outlet of a hydraulic support and used for collecting emulsion flowing out of the hydraulic support, the liquid return pipe is communicated between the liquid return box and an emulsion pump station, and the power device is arranged on the liquid return pipe and used for conveying the emulsion in the liquid return box to the emulsion pump station through the liquid return pipe. The power device is the high-flow plunger pump, and the high-flow plunger pump is configured to be capable of adjusting the flow of the emulsion according to the amount of the emulsion in the liquid return box. The backpressure-free liquid return system and the high-flow plunger pump have the advantages that on-way resistance encountered when the emulsion returns can be overcome, and normal liquid return and work of the hydraulic support are guaranteed.

Description

technical field [0001] The present application relates to the field of coal mining, in particular to a liquid return system without back pressure and a large-flow plunger pump. Background technique [0002] In the process of coal mining, it is necessary to use a large number of hydraulic actuators to carry out work. Hydraulic actuators are equipment driven by liquid pressure. For example, hydraulic supports are one of the important hydraulic actuators in fully mechanized coal mining faces. Taking the hydraulic support as an example, its power source is to transport the emulsion in the emulsion pump station through the liquid supply pipeline to meet the power demand of the hydraulic support. In actual use, the emulsion pump transports the emulsion in the emulsion tank to the hydraulic support on the working face through the liquid inlet pipe to realize long-distance liquid supply. At the same time, the emulsion in the hydraulic support is transported through the liquid return...

AI Technical Summary

Problems solved by technology

[0003] However, the emulsion flow rate from the hydraulic support to the emulsion pump station is uncertain, and it flows back to the emulsion pump station completely by its own flow. However, due to the long distance between the emulsion pump station and the hydraulic support, when the emulsion pump station and the hydraulic support appear When the height is different, it will cause the emulsion to form a back pressure in the return pipe, which will increase the resistance along the way when the emulsion returns, thus affecting the normal return of the emulsion on the hydraulic support and affecting the normal operation of the hydraulic support.

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