US3074262A

US3074262A - Washing apparatus for filtering fibers

Info

Publication number: US3074262A
Application number: US131168A
Authority: US
Inventors: Hayashida Tatsutaka
Original assignee: Individual
Current assignee: Individual
Priority date: 1961-08-14
Filing date: 1961-08-14
Publication date: 1963-01-22
Anticipated expiration: 1980-01-22

Description

Jan. 22, 1963 TATSUTAKA HAYASHIDA 3,0

WASHING APPARATUS FOR FILTERINC FIBERS Filed Aug. 14, 1961 2 Sheets-Sheet 1 Fig. l

F2 A l 4 INV EN TOR my ATTORNEY Jan. 22, 1963 TATSUTAKA HAYASHIDA 3,07

WASHING APPARATUS FOR FILTERING FIBERS Filed Aug. 14, 1961 2 Sheets-Sheet 2 ATTORNEY 3,074,262 WASHING APPARATUS FOR FILTERING FIBERS Tatsutaka Hayashida, Fushimi-ku, Kyoto City, .lapau (70 Hayashida Kikai Kogyo Co. Ltd., 44 Sugimotocho, Fushimiko, Kyoto City, Japan) Filed Aug. 14, 1961, Ser. No. 131,168 1 Claim. ((31. 68-18) The present invention relates generally to washing apparatus, and, more particularly, to apparatus for washing filtering fibres such as pieces of cotton or asbestos used in filtering operations.

In the conventional type of washing apparatus for washing such fibres, a pulsator is provided in the bottom of a washing vessel and an annular water chamber is provided about the outer portion of the washing vessel. The entire surface of the internal wall of the water chamber in the washing vessel is in the form of wire netting. Holes are provided in the external wall of the washing chamber and water which has already washed the fibres flows out through these holes.

In the operation of this type of apparatus, the contaminated fibres which are placed into the washing vessel for cleaning are agitated by the pulsator and float on top of the washing water. These fibres thus clog the wire netting which is fixed on the inside wall of the water chamber. Thus, this causes a rise in the water level in the vessel and the filtering fibres which gather on the inside Wall overflow the edge thereof along with the washing water.

In order to prevent this from occurring, the amount or" water which was supplied to the washing vessel was reduced, or'the revolving speed of the pulsator was reduced. However, when such steps are taken to prevent overflow, the capacity of the Washing apparatus is thereby reduced. Accordingly, the conventional type of washing apparatus is not sufiicient for washing this type of material.

With these defects of the prior art in mind, it is a main object of the present invention to provide washing apparatus for washing material of the type described wherein the problem of overflowing of the fibres with the washing water is eliminated.

Another object of the invention is to provide washing apparatus of the character described wherein there is no need to limit the supply of washing water or to decrease the revolving speed of the pulsator.

A further object of the present invention is to provide a washing apparatus which is more efficient than those known in the prior art for washing the material described above.

These objects and others ancillary thereto are accomplished according to preferred embodiments of the invention wherein the washing vessel and superstructure is provided of more or less conventional form. However, the pulsator and the exhaust pipe are so positioned in relation to each other that the limitation of the amount of washing water which can be supplied and the speed of revolution of the pulsator are eliminated so that full washing capacity can be attained.

Additional objects and advantages of the present invention will become apparent upon consideration of the following description when taken in conjunction with the accompanying drawings in which:

FIGURE 1 is a vertical partial sectional view of the washing apparatus of the present invention.

FIGURE 2 is a vertical sectional view of the pulsator and outlet illustrated in FIGURE 1.

FIGURE 3 is a vertical sectional view through the pulsator and outlet of another embodiment of the invention.

With more particular reference to the drawings, a washing vessel 1 is provided with pulsating impellers 2 located closely adjacent to the internal surface of the washing Eatentecl .ian. 22, 1963 vessel. The shafts 3 of these impellers are rotatably supported by bearings 4 which are fixed to the external wall of the washing vessel. The impellers are revolved by means of pulley wheels 5.

Annular grooves 6 are provided around the circumference of the impellers and surround the impellers. These grooves may be formed by deforming the external surface of the washing vessel outwardly or by cutting a slot into the external wall and welding an annular channel to the edges of this cut out portion.

Wire netting 7 is placed at the circumference of the impellers and covers the grooves 6. This is as is shown in FIGURES l and 2 whereas in FIGURE 3 annular channels 6' are formed by filtering nettings '7.

The main exhaust pipes 8 are provided and communicate with the channels 6. These pipes are provided with exhaust regulating cocks 9. The washing Water intake ill is provided for adding water to the interior of the vessel and a water chamber 11 is formed at the upper outer end of the washing vessel. Along its entire interior wall 12, a wire netting 13 is connected and auxiliary exhaust pipes 15 are connected to the external Wall 14 of the water chamber 11.

The contaminated fibres to be cleansed are then thrown into the washing vessel 1 and water is supplied to the vessel by means of intake pipe ill. The pulsating impellers 2 are revolved and the filtering fibres are washed clean due to the water flow therethrough caused by the impellers. in the conventional type of washing apparatus which is not provided with a main exhaust pipe the water intake 1% at the bottom of the washing vessel will form currents which push and force the fibres upwardly and clog the wire netting attached to the internal wall of the water chamber '11 at the outer portion of the washing vessel.

However, in the present invention main exhaust pipes S are provided which are connected to annular grooves 6 or 6' in the wall of the washing vessel 1. The water will first flow through the annular filtering net 7 or 7' instead of flowing out through the filtering net at the top. Filtering fibres will be carried along with this flow of water and they will flow to and tend to clog the filtering wire netting 7 and 7'. In both embodiments, i.e., in the convex form of filtering netting '7 or in the fiat form of filtering netting 7, the nettings surround the location where the impellers are in operation and the filtering fibres which become clogged on the filtering netting '7 or 7 are thus carried away by currents of water which are generated by the impellers. The nettings are cleared of the clogged condition and allow proper flow of water out of the vessel.

Therefore, the filtering nettiugs '7 and '7' are never clogged by the filtering fibres and water may be exhausted in optimum fashion. to main exhaust pipes 8 are connected to the annular water channels 6 which are installed below the water level in the washing vessel. The filtering fibres in the vessel will float on the surface and will not clog the upper filtering net 13 which is located at the upper end of the washing vessel and at the outer circumference thereof, and a sufiicient quantity of washing water can be supplied and the impellers can be revolved at full speed and provide high efficiency in washing of the filtering fibres.

The particular embodiment illustrated in the drawings shows a washing apparatus which is equipped with two pulsating impellers at opposing positions on the external wall of the washing vessel and there are two annular grooves, one surrounding each impeller. Also there are two main exhaust pipes, one for each groove, and two regulating cocks and two auxiliary exhaust pipes. It is not always necessary to provide two of each of the above mentioned elements since one of each may be enough to accomplish the objects of the present invention.

It will be understood that the above description of the present invention is susceptible to various modifications, changes, and adaptations, and the same are intended to be comprehended within the meaning and range of equivalents of the appended claim.

I claim as follows:

A washing apparatus for filtering fibers, comprising, in combination: a Washing vessel; and a pulsatingimpeller mounted for rotation in said vessel closely adjacent the '4 inside wall thereof and below thenormal constant water level in said vessel, said vessel including an indented annular outlet surrounding said impeller, a main water exhaust pipe connected to said outlet, and a flat filtering net 5 fixed over said annular outlet.

References Cited in the file of this patent UNITED STATES PATENTS 982,578 Dilg Jan. 24, 1911 10 2,119,254 Whiteley May 31, 1938 2,589,247 Guzzetti Mar. 18, 1952