US1558640A - Priming and regulating device for pumps of the screw, centrifugal, and valveless type - Google Patents

Description

w. 27, 1925- 1,5 8,640 7 A; B. SEABORNE PRIMING AND REGULATING DEVICE FOR PUMPS OF THE. SCREW,

CENTRIFUGAL, AND VALVELESS TYPE Filed Oct. 4, 1924 lNVENTOH.

Patented Oct. 27, 1925.

UNITED STATES PATENT OFFICE.

ALLEVER BURTON SEABORNE, OF NORTH FINCHLEY, LONDON, ENGLAND.

PRIMING AND REGULATING DEVICE FOR PUMPS OF THE SCREW VALVELESS TYPE.

Application filed October 4, 1924. Serial No. 741,686.

To all whom it-may concern:

Be it known that I, ALLEVER BURTON SEABORNE, a subject of the King of Great Britain, residing at Eastwood, Ballards Lane, North Finchley, London, England, have invented improvements in and relating to priming and regulating devices for pumps of the screw, centrifugal, and valveless type, of which the followlng 1s a spec fication.

This invention relates to priming and reg ulating devices for screw and centrifugal and more especially for all valveless types of pumps and has for its object ensuring such non-positive acting pumps always starting up and continuing in operation.

In such types of pumps, great d1tficulty is experienced not only in keeping them primed to facilitate starting up and continuing in operation, but when used for. certain purposes a further difliculty arises 1n the event of the end of the suction pipe bemg uncovered, so allowing great quantities-of air being pumped which quickly hasdlsastrous results on the pump;

In order to overcome these defects it hasbeen proposed to employ interceptor tanks to ensure efiicient primlng and to employ means for stopping the pump as soon as it starts pumping air. In the case-of pumps electrically driven it has been usual to ems ploy means for automatically switchlng ofl the current to the motor but it has been difiicult to arrange automatic means for stopping pumps not electrically driven.

Now the present invention overcomes these drawbacks in a, simple and eflicient manner and allows the pump to continue functioning in a' normal way even thoughthe end of the suction pipe is uncovered freely to the atmosphere.

The present invention comprises essen tially means for kee ing the pump always full of water and on Thisinvention will be now more particularly described making reference. to the accompanying drawing in which the figure is a view in side elevation-partly in section'of the preferred embodiment of the present invention. 7

A closed tank a is connected at its lower part to the inlet 6 of the pump a, which is situated below said tank a, and at its upper of the pump c.

e terminates some distance below the said entrance to the tank a and its bottom end y passing air through it in small and controlled quantities.

dependent liquid supply. The member 6 is aconed' tube, shaped and arranged as shown,- the bore of which is in line with the entrance to the tank a from the suction pipe d and the exit from the tank a to the inlet pipe b The upper end of this tube is in close proximity to said exit from the tank, by such means it will be seen that any relatively large pieces of foreign matter are prevented from entering the suction .pipe 6 of the pump. The tube e is held in proper position within the tank a by webs or a spider as shown. .The whole arrangement being, such that in normal operation all liquid passes through the closed tank a before entering the pump 0 and any air contained in the liquid and accumulating in the upper part of the tank is removed together with the liquid through the pump 0. If, however, the liquid falls below the end of the suction pipe :5 so as to uncover it to the atmosphere, the level of liquid falls in the closed tanka and with it the float f, which then operates the valve 9 to allow liquid to enter the closed tank a from the reservoir 5 or other supply. This operation goes on continuously, whilst the suction pipe 02 is uncovered, the liquid being pumped in a closed circuit entraining air from the suction pipe at and passing it with the liquid through the pump 0 and back into the reservoir z.

When the liquid rises to close the end of the subtion pipe d it is still pumped in a closed circuit until it has created suiiicient negative pressure in the closed tank a as to cause the liquid to-rise in the suction pipe (Z and thus into the closed tank a.

The level in the closed tank a will continue to rise until the float f therein rises and operates to close the valve 9, so cutting off the liquid supply therethrough and so CENTRIFUGAL, Ann

establishing the normal operation of the pump.

It is preferable to employ the reservoir 1' as the source of supplyiof liquid to the closed tank a through the valve g.

In a preferred construction as shown, the closed tank a is formed in two parts, the one containing the coned tube 6 and the other forming the float chamber and the two communicating through a gauze screen or strainer a so as to ensure the float f workin in a liquid freed from solid matter or de ris and with the same object in view the liquid supply to the valve 9 may be also constrained to pass through a suitably arranged strainer. I declare that what I claim and desire to secure by Letters Patent is 1. A priming and regulating device for pumps of the centrifugal and valveless type comprising aclosed tank between the suc.

tion pipe and 5 the pump, a connection between the lower part of the tank and the inlet of the pump which is situated-below said tank, a connection between the upper part of the tank and the suction pipe, a coned comprising a closed tank between the suction pipe and the pump, a connectionbetween the lower part of the tank and the inlet of the pump which is situated below said tank, a connection between the upper part ofthe tank and the suction pipe, a coned tube Within said tank, a passage connecting. together the suction pipe Where it enters the tank and a reservoir into which the liquid is pumped, a valve situated in said pipe or passage, a float within said tank adapted to control the opening and closing of said valve and straining device to ensure the float and valve working in a liquidjreed from solid matter, as set-forth;

ALLEVER BURTON SEABORNE.

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