US681233A - Suction-valve for pumps. - Google Patents

Description

No. 68I,233.

` (no maal.)

Patented Aug. 27, l90l. J. KLEIN.

s'ucmn vALvE Fon Pumps. (Applicntion hd Nov. 92, 1900.)

` UNITED STATES To all whom t may concern:

Be it known that I, JOHANN KLEIN, manu- `facturer, a subject of the King of Bavaria, residing at Frankenthal, Palatinate, Germ any, p have invented certainv new and useful Im- .p `provements in Suction-Valves for Pumps, of which the following is a speciication. y y" .p This invention relates to suction-valves for p pumps provided with sets or groups of valves or `annular or step valves; and it has for its `purpose to attain a very great speed of the pump.

UOne ofthe most important conditions for la silent working of a pump consists in preventing the interruption of the water 4column l whereby water hammer is produced. For this purposethe mass or volume of water to `be accelerated should be as small as possible. r Inorder to attain the same purpose, the suction air-chamber is arranged as close as pos sible tothe suction-valves, and it is proposed pto give the lower part of the body of the pump `the form of` a suction air-chamber. By this means, owing to the slight difference between the level of the suction-valves and the waterlevel in the suction air-chamber, the pressure i required to accelerate the iiow of waterV is materially reduced. Pumps provided with group, annular, or step valves have, however, the disadvantage that there exists a very great dierence between the area of the cross-section of the suction-pipe extending into the suction-chamber and the cross-secl tion of the passage of the suction-valves. Owing to the great variations of speed rel sulting therefrom in such pumps, the number ofstrokes cannot ,be increased beyond a decrmined limit. l This invention relates to the arrangement cfa suction-valve wherein bya suitable construction of the valve-seat the obstacles in the movement above mentioned are avoided, yand which, moreover, offers several other ad- 3 Vantages as compared with the hithertoknown arrangements by which a silent exact working of the pump is insured and a much higher speed attained. y The accompanying drawings show several forms of construction of this suction-valve. 5o Figure 1 is a vertical section through the lower part of the pump, showing the form of JOHANN KLEIN, OF FRANKENTIIAL, GERMANY.

SUCTION-VALVE FOR PUMPS.

SEEGIFIGATION forming part of Letters Patent No. 681,233, dated August 27, 1901. Application filed November 22, 1900. Serial No. 37,383. (No model.)

construction for groupvalves. Fig.2 is a horizontal section on line A Bin Fig. l. Fig.

3 is a similar section as Fig. l through a pump -body with annular valves. Fig. 4 shows a corresponding section through a pump-body with a three-step valve.

All these constructions have in common the arrangement of tubes l?, which extend downward from underneath the valve-seats and dip into the water in the lower part of the suction-chamber C, thereby constituting in the upper part of this chamber, between. the tubes themselves and between the latter and the adjacent walls of the pump-body, a free air space or chamber D as close to the suction-valves as is possible. In addition to these tubes b a cylinder a may be employed, which surrounds the whole series of tubes b and forms the outer wall of the air-chamber in the pump-body. In the construction shown in Figs. l and 2 the tubes b are formed in one piece with a diaphragm and at their upper ends they are fitted with valves .I of ordinary known construction. In this instance to pre- Vvent throttling of the water by the valves the upper parts of the tubes are flared or coned, as shown. The severa-l tubes bmay also be connected by strengthening-webs 7c lc. In annular and step valves, Figs. 3 and 4, there are also arranged below the several parts of the valve-tubes b, leading the water directly to the valve. In all these cases the water is subdivided by the small tubes b below each section of the valve, and variations of speed in the passage from the suction-chamber into the pump-chamber are avoided. The spaces between the valves in the old construction oer a resistance to the low of the water; but in the new construction each space between the tubes b constitutes an air vessel, the pressure in which assists the movement of the water.

The water is led to the several parts of the valve in a numbenof straight parallel streams the axis of each of which'is the shortest path from the suction-chamber to the pump-chamber, and as the direction of each stream is normal to the valve there is no tendency of the valve to tilt or bind. Each of the streams Ioo being inclosed and isolated, the production of eddies and counter-currents is reduced to a minimum on the suction side, While at the same time the Volume of liquid to be aceeler ated at every stroke, of the piston is reduced to a minimum ,and the rate of 'flow is made more uniform, so that at no one point is the velocity relatively greater th'an at any other point. If through the suction-conduit airbubbles enter, they do not penetrate suddenly into the pump-chamber between the suction and forcing valve, but they are distributed and enter only slowly into the pump-chamber, so that the frequently-occurring shocks are avoided.

I claiml. The combination with the valve, of a plurality of separated tubes leading thereto and serving to divide the Water passing to the /valve into a number of small streams, the

space between the tubes constituting an airchamberadjacent to the valve, substantially as described. r

2. The combination with the valve-seat provided with a plurality of valve-controlled passages, of a plurality of separated tubes leadwitnesses. l

JOHANN KLEIN. Witnesses:

Jos. KLEIN, JACOB ADRIAN.

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