Cleaning and liquid contact with solids – Apparatus – With treating fluid purifying or separating means
Patent
1987-02-26
1989-10-17
Hornsby, Harvey C.
Cleaning and liquid contact with solids
Apparatus
With treating fluid purifying or separating means
134169C, 137240, B08B 906
Patent
active
048740020
DESCRIPTION:
BRIEF SUMMARY
Before regular operation, hydraulic and lubrication piping systems, for example, require internal cleaning for removing contaminating particles remaining after manufacture and assembly, which particles otherwise cause damage later during the regular operation. The cleaning is carried out by flushing, a thorough and time-consuming process. In order to achieve a satisfactory result, it is, according to the general opinion, necessary to carry out the flushing with a flow volume approximately double to the nominal flow volume of the piping system and, in addition, preferably at the same temperatures as during normal operation, in order to obtain a turbulent flow, Reynold's number about 3000. Of the flushing aggregate, mainly of its hydraulic pump, is thus required about the double flow capacity compared to what is required for the regular operation. For large piping system this demand leads to unreasonable high costs since the "over-dimensioned" flushing aggregate is used only once. For this reason, such piping systems have heretofore in most cases been inadequately flushed, with the result that impurities remained in the piping system, which later, but often very soon, have caused serious damage.
The object of the present invention is to provide a new apparatus enabling an efficient flushing of piping system at low costs.
The present invention thus relates to an apparatus for flushing a piping system, or a part thereof, comprising a hydraulic pump means and filter means.
The apparatus according to the present invention is mainly characterized in that the operational pressure of the pump means is essentially higher than what is required for overcoming the pressure fall of the piping system at nominal flow volume, that between the pump means and the pressure line of the piping system is connected at least one pressur liquid accumulator, and that the flushing circuit includes a blocking valve arranged to be intermittently opened in order to effect a powerful pulsating flow through the piping system.
The apparatus can be embodied as a complete flushing aggregate with a pump and a tank of its own. An alternative is to make use of the existing hydraulic liquid tank of the piping system and thus have an aggregate with a pump, pressure liquid accumulator(s) and filter means.
It is possible to further reduce mobile units with the benefit by making use of the same hydraulic aggregate which is intended for the regular operation of the piping system. The mobile units remaining are a pressure liquid accumulator unit and a filter unit which may be combined into one. These units may be connected by means of flexible hoses, between the hydraulic aggregate and the outline of the piping system as well as between the in-line of the piping system and the hydraulic aggregate, respectively. if there is a plurality of out- and/or in-lines they may either be coupled together or flushed separately. When flushing, the regular filter cartridge of the hydraulic aggregate is removed and replaced by a separate filter unit of larger capacity.
In the following the invention will be described more in detail, with reference to the attached drawing showing three embodiments in schematical diagram form.
FIG. 1 shows an embodiment of a complete flushing aggregate.
FIG. 2 shows an embodiment utilizing a hydraulic aggregate intended for the regular operation of the piping system.
FIG. 3 shows an embodiment like the one of FIGS. 1 and 2, except for its control.
In FIG. 1, reference numeral 1 indicates a basic unit of the apparatus. A piping system to be flushed is schematically indicated by the line 2.
The basic unit 1 of the aggregate has a drive motor 3 for two hydraulic pumps 4 and 5, each with a safety valve 6 and 7, respectively. The (pressure) out-lines of the pumps 4 and 5 are denoted 8 and 9, conventional shut-off valves are denoted 10 and 11. The out-line of the piping system 2 starts at a connection 12 and the (return) in-line of the piping system ends at a connection 13. 14 is a conventional shut-off valve, 15 and 15a indicate each valve
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patent: 4325340 (1982-04-01), O'Neill
patent: 4485840 (1984-12-01), Erwin
Hornsby Harvey C.
Reinckens Corinne M.
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