Apparatus for automatically adding foaming agent

Abstract

The invention relates to an apparatus for automatically adding a foaming agent, which comprises a filter, a main pipe, an ejector, a side branch pipe, a stop valve, an inverted valve, a tapered valve, a soft pipe joint and a liquid suction hose. One end of an inlet joint of the main pipe is connected with a downhole water pipe, one end of an outlet joint of the main pipe is connected with a foam maker, when the flow in the pipeline passes though the addition apparatus, the foaming agent is automatically sucked by using negative pressure formed by the ejector, the foaming agent and water are mixed to form a uniformly foaming liquid and then flows. The vacuum degree of cavity of the ejector and the backpressure of the outlet end can be simultaneously regulated by adjusting the stop valve ofthe side branch, therefore, continuous and stable suction of the foaming agent can be realized, the addition of the foaming agent can be slightly regulated by the tapered valve for realizing the highprecision adjustment of automatically adding of the foaming agent. The present invention also has the characteristics of simple structure, small volume, light weight, high adjusting precision, convenient operation and intrinsic safety, and especially suitable for mixing of the foaming agent and water with small ratio under narrow space of a coal mineral well.

Description

technical field [0001] The invention relates to an automatic foaming agent adding device, which is especially suitable for reasonable mixing of the foaming agent and pressurized water when the foam dust is suppressed in the narrow space under the coal mine. Background technique [0002] In order to prevent and control dust, dust control measures such as spray dust suppression and coal seam water injection are generally used in coal mines, but they cannot contain dust disasters well because of the low dust removal efficiency. Foam dust suppression technology has significant advantages such as high efficiency and low water consumption. Since it was proposed in the 1950s, it has been greatly developed and has been tested and applied in some mining areas at home and abroad. However, the blowing agent supporting device in foam dust suppression technology The complex structure, large floor area, inconvenient adjustment, and difficult control of the proportion of added amount lead ...

AI Technical Summary

Problems solved by technology

But the foam mixing ratio is automatically adjusted by the return spring, so the mixing effect is poor, and the ratio cannot reach the optimal mixing ratio range of dust-reducing foam

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