Automatic discharge and self-cleaning filter device for emulsion pump station

Abstract

The invention provides an automatic discharge and self-cleaning filter device for an emulsion pump station. The device comprises an entrance pressure gauge, a high-pressure energy storing device, a discharge valve, an entrance pressure sensor, a one-way valve, an exit pressure gauge, a ball valve, an exit pressure sensor, connecting pipes and an electric control system; an entrance connected with the emulsion pump station is provided with a low-pressure energy storing device; one or more precision filters are connected in parallel with a pipeline communicated to a liquid supply system, and an entrance passage of each precision filter is connected with a two-position four-way hydraulic change-over valve; a control oil passage of each two-position four-way hydraulic change-over valve is connected in series with a two-position three-way electromagnetic valve; an oil inlet pipeline of each two-position four-way hydraulic change-over valve is provided with a flow rate sensor; and each two-position four-way hydraulic change-over valve and an oil return opening of the two-position three-way electromagnetic valve corresponding to the two-position four-way hydraulic change-over valve are connected with a coarse filter which is connected with an oil tank by a pipe. The device has the advantages of simple structure, high reliability, little system pressure impact, low vibration and noise, convenient use and easy maintenance.

Description

technical field [0001] The invention relates to an automatic unloading and self-cleaning filtering device for an emulsion pumping station, and is especially suitable for a support hydraulic system of a fully mechanized mining working face in a mine. Background technique [0002] The emulsion pump station is the power unit of the support hydraulic system of the fully mechanized mining face, and its performance is directly related to the benefit and safety of coal mine production. At present, the emulsion pumping station still has the following deficiencies: (1) The filtering precision of the configured filter is low, and the cleanliness of the emulsion output from the pumping station is difficult to meet the requirements of relevant technical standards, which seriously affects the work of the support hydraulic system Reliability; (2) The configured filter element is easy to block, and once it is blocked, it is not easy to clean, which not only affects the working performance ...

AI Technical Summary

Problems solved by technology

At present, the emulsion pumping station still has the following deficiencies: (1) The filtering precision of the configured filter is low, and the cleanliness of the emulsion output from the pumping station is difficult to meet the requirements of relevant technical standards, which seriously affects the work of the support hydraulic system Reliability; (2) The configured filter element is easy to block, and once it is blocked, it is not easy to clean, which not only affects the working performance of the support hydraulic system, but also affects normal production due to the need to disassemble, clean or replace the filter element; (3) Even if the filter element has been The emulsion pump station equipped with a backwash filter device still cannot achieve satisfactory results, such as: it is difficult to determine the clogging of a single filter installed with more than 2 filters, and it is impossible to visually display the filter The degree of clogging, no clogging alarm function, low automation of backwash control, and insufficient adaptability to the output flow of the emulsion pump station (for example: for a small pump station with only one filter installed, backwash filtration cannot be achieved) , the effect and efficiency of self-cleaning are not ideal due to the small flow rate of backwashing, and it is not convenient to replace the damaged filter element. The emulsion discharged from backwashing is not effectively used, and even pollutes the environment. The flow of sewage through the electromagnetic reversing valve is likely to cause the valve core to get stuck and cause the backwash function to be lost, etc.; (4) Some emulsion pump stations are not equipped with automatic unloading and pressure maintaining devices, which not only wastes energy, but also causes The system caused related faults due to heat, and the existing backwash filter device could not be used on it; (5) Although some emulsion pump stations adopted self-unloading technical measures, the vibration and Noise has not been effectively controlled

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