Duplex filter manual and automatic switching device

Abstract

The invention relates to a duplex filter manual and automatic switching device and aims at providing a duplex filter manual and automatic switching device for a gas engine, which comprises an alarm unThe invention relates to a duplex filter manual and automatic switching device and aims at providing a duplex filter manual and automatic switching device for a gas engine, which comprises an alarm unit consisting of a relay and an alarm lamp, a differential pressure sensor, an A / D switching unit, a comparison amplifying circuit, the relay and the alarm lamp, which are connected sequentially by ait consisting of a relay and an alarm lamp, a differential pressure sensor, an A / D switching unit, a comparison amplifying circuit, the relay and the alarm lamp, which are connected sequentially by alead, wherein the comparison amplifying circuit is also connected with the control signal access end of a manual and electrically control two-mode three-way valve; the inlet end of the manual and eleclead, wherein the comparison amplifying circuit is also connected with the control signal access end of a manual and electrically control two-mode three-way valve; the inlet end of the manual and electrically control two-mode three-way valve is connected with an oil feeding pipe, two outlet ends are respectively connected to oil feeding pipes of the filter, the oil feeding pipes are connected in ptrically control two-mode three-way valve is connected with an oil feeding pipe, two outlet ends are respectively connected to oil feeding pipes of the filter, the oil feeding pipes are connected in parallel, and oil outlet pipes of the filter, which are connected in parallel, are combined to an oil outlet pipe; and the differential pressure sensor is provided with two pressure drawing pipes whicharallel, and oil outlet pipes of the filter, which are connected in parallel, are combined to an oil outlet pipe; and the differential pressure sensor is provided with two pressure drawing pipes which are respectively connected with an oil inlet pipe and the oil outlet pipe. The duplex filter manual and automatic switching device implements the alarm and automatically switches the filter accordingare respectively connected with an oil inlet pipe and the oil outlet pipe. The duplex filter manual and automatic switching device implements the alarm and automatically switches the filter according to the blocking condition of the filter, also keeps the original manual switching function, and has simple structure, convenient reconstruction, small volume, flexible arrangement, low cost, suitableto the blocking condition of the filter, also keeps the original manual switching function, and has simple structure, convenient reconstruction, small volume, flexible arrangement, low cost, suitablepopularization and good expandability. popularization and good expandability.

Description

technical field [0001] The invention relates to a duplex filter conversion device, in particular to a duplex filter manual-automatic dual-purpose conversion device suitable for internal combustion engines. Background technique [0002] In order to ensure that the engine filter can be replaced and cleaned in turn when not stopping, internal combustion engines, especially in larger internal combustion engines or marine internal combustion engines, often use double or even multi-connected filters, such as the oil filter of TBD234 engine, The fuel filter of the 12150C diesel engine and the oil filter of the 6300C diesel engine all use double or even quadruple filters. [0003] In the actual work of the double filter, usually only one filter works. When the working filter is clogged or has other failures, it is manually switched to another filter to make it work. The conversion period of the filter is generally determined by the specified time. [0004] However, through manual ...

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Problems solved by technology

[0004] However, through manual conversion, there are some problems: First, due to the different working environment of the engine, the standard replacement cycle (working time) obtained by the experimental conditions may not be accurate, so it often leads to the situation that the conversion is not performed when it should be converted, and it is converted in advance when it should not be converted. secondly, manual conversion is low in automation, time-consuming and laborious, and inconvenient, especially for human operation, so there are often misoperations or forgotten operations; the most important thing is that it is difficult to grasp the timing of manual conversion, which often makes the engine fuel Or the filter effect of the engine oil is not good or it directly enters the oil passage without filtering, resulting in extreme wear of the machine or mechanical failure, which seriously shortens the service life of the engine and causes large economic losses

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