RU1801625C - Method of washing hydraulic system pipe lines - Google Patents

Abstract

Usage: when washing the loopbacks of pipelines and the entire hydraulic system of various products. SUMMARY OF THE INVENTION: in the method, liquid is pumped through a pipeline, heated, at the same time a part of the pumped liquid is drained, cooled and introduced into the stream in portions in the form of high-viscous plugs. Gas is introduced into the center of the high viscous plug under pressure. 1 s.p. f-ly, 1 ill.

Description

The invention relates to washing equipment and can be used for washing pipes, pipe loops in the assembled hydraulic system on various products, in particular, in the manufacture and operation of aircraft.

The object of the invention is to increase the washing efficiency.

The drawing shows a diagram of a device by which the proposed method of washing can be implemented.

The device contains a container 1 for storing the washing liquid, a discharge line with a pump 2, a filter 3 and a flowmeter 4. The liquid to the flushed pipe 5 is supplied either through the line with tap 6 and heater 7, or through the line with tap 8 and cooler 9. Temperature heating is measured with a thermometer 10, and the cooling temperature with a thermometer 11. The gas is introduced into high plugs by supplying it to the central part of the stream from a high pressure gas source (not shown). The gas supply is provided using a valve 12, and the flow rate is regulated by a throttle 13.

The method is carried out as follows.

. Consider flushing pipelines with AMG-10 liquid without introducing gas. The flushed pipe 5 is connected to the flushing stand, the pump 2 is turned on, the valve 6 is opened and the valve 8 is closed. The valve 12 is also closed. The liquid is pumped through a flushed pipe with heating of the supplied liquid in the heater 7. At the same time, the liquid in the cooler 9 is cooled. The temperature of the pumped liquid is raised to 80 ° C and maintained at this level. The temperature of the liquid in the cooler is lowered to -20 to -25 ° C. When the maximum flow rate in the flushed pipe is reached, which is recorded by the flowmeter 4, the valve 6 is turned off and opened 8. The liquid plug cooled in the cooler 9 is supplied to the flushed pipe and, passing through it, detaches high adhesion contaminants. The faucet 8 is closed and the faucet 6 is opened. The next portion of chilled liquid is prepared. The volume of cooled liquid

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the bones are determined so that the length of the plug is 10-30 diameters of the pipe being washed.

When flushing long pipelines, in order to preserve the high-intensity effect of the fluid plug longer, gas should be introduced into it. Gas should be introduced into the central part of the pipe, while the head and tail parts of it should not contain gas inclusions at a distance of the order of 2-10 pipe diameters. This ratio of dimensions ensures that, when the pressure in the pipeline decreases, which occurs when the plug moves along its length from inlet to outlet, the plug swells in the radial rather than longitudinal direction. The described plug configuration is provided by the turn-on time of the valve 12. The gas component should occupy 0.1 - 0; 3 sections of the pipeline. The flow rate of the gas supplied is adjusted by the throttle 13 ... ..

The proposed method, at a constant pressure at the inlet to the flushed pipeline, can significantly increase the flow friction acting on the particles of pollution. Intrinsic flux into the stream of foreign substances is excluded. The method is easily implemented by a simple refinement of the washing equipment available at the enterprises. For simplicity, heating "swelling can

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Claims (2)

throttle it, and cool the liquid - by introducing vapors of liquefied gases into it, or by blowing these pairs of the outer surfaces of the pipeline. A possible implementation of the method is when a liquid is introduced into a stream of heated liquid at an initial temperature, i.e. 20 ° C. In this embodiment, a part of the liquid from the container 1 is reserved and fed into the flushed pipeline in portions, for example by extrusion from an additional container. It is also possible to flush, plug in the flushed outlet. the pipeline directly to the inlet at 5 coca, by pumping, a heated liquid with a peri- mercal connection of the pump with a capacity of 1, thereby ensuring the entry of colder liquid from it. ; : Formula and sampling 1. The method of flushing the hydraulic system pipelines by pumping a working fluid through the cavity, and so that, in order to increase the flushing efficiency, the pumped liquid is heated . at the same time, part of the pumped liquid is drained, cooled to form highly viscous plugs, and the plugs are introduced into the pumped liquid. . : - 2. The method according to p. T, about t l and h and yuy and with 0 by the fact that in the central part of the high viscous cork. gas is introduced under pressure. 0 5