US1608589A - Pump-controlling means - Google Patents

Description

Nov. 30 1926. i' 1,608,589

G. w. ENGSTROM PUMP CONTROLLING MEANS Filed Jun 8', 1922 :Eni i sii the float lever 15.

Patented Nov. 30, 1926.

UNITEDSTATES PATENT OFFICE.l

GUSTAF W. ENGSTROM, F RIVERSIDE, ILLINOIS, ASSIGNOR TO INTERNATIONAL HAR- VESTER COMPANY, OF CHICAGO, ILLINOIS. A CORIORATION 0F NEW JERSEY.

PUMP-CONTROLLING MEANS.

Application led June 8,

My invention relates to a control device for t'ecd pumps and particularly to a means for controlling the intake valve.

The feed pumps used in automotive steam power plants are usually single stage pumps which draw water from a ot well or direct from a condenser and deliver it to I from drawing in air when the supply of water falls below a predetermined level.

In the drawings, I have illustrated an embodiment of my invention adapted to attain the object sought.

Fig. 1 is a vertical section of the pump and control means taken on the line 1 1 of Fig. 2;

Fig. 2 is a plan of Fig. 1;

Fig. 3 is a section of the pump taken on the line 8-3 of Fig. 2; and

. Fig. 4 is a section on line 4-4 of Fig. 1 showing the valve trip mechanism.

In Fig. 1 I have shown a float chamber or reservoir having a body 10 closed by cover 11 into which the pipe 12 leading from a condenser discharges. The cover is also provided with a relief valve 13 through which steam 4from the con-denser or air trapped in the float chamber`may escape. In the bottom of the float chamber there is secured a support 14to which one end of a ioat lever 15 is pivotally connected, the other end of the lever being connected to a oat lhaving a stem 17 extending upward Vinto the guide 18 secured to the cover. The trip lever 19 is pivoted intermediate its ends to the standard 14 and at one end has two laterally projecting lugs 20, 21 to which. one end of each of the springs 22, 23'is connected, the opposite ends of the springs being connected to similar lugs 24, 25 on The other end of the lever 19 engages a plunger 26 slidably mounted in a guide in the body of the reservoir. -The cylinder 27 ofthe feed pump has an intake Jpassage 28y controlled by a valve A29 and a discharge passage 30 controlled by a similar valve 31, the cylinder y being secured to the body of the reservoir with the intake passage 'in communication 1922. Serial No. 566.919.

therewith. The )iston 32 recprocates in the bore of thc ey indell and is connected to a ICrosshead 32 which is reciprocated by the connecting rod 38. A stulling box 34 prevents leakage ot' water past the iston 32. In the operation of my device,` tie pump is driven from the engine and water from the condenser enters the float chamber through the passage 12. the pump drawing its supply through the inlet passage 28 and discharging it through the outlet and pipe 35 leading to the boiler. Assume now that 'the reservoir contains enough water so that the float 16 is raised and the plunger 26 lowered so as to permit the valve 29 to s eat.` The pump then supplies water to the boiler as long as the supply of water entering the float chamber through the pipe 12 is sufficient to keep the float 16 raised and let the valve 29 seat. But, it the pump, for any reason, delivers water faster than it is supplied through the pipe 12, the float will drop with the water lever until a point is reached at which the springs 22 and 23 pass below the pivotal connections of the levers 15 and 19 when the tree end of a lever 19 will -be suddenly thrown upward against the plunger 26 and `hold the valve 2 9 from its seat. As the pump now continues to operate, it will draw in ,-water through the passage 28 on its intake stroke and on its delivery stroke will force the water back through the passage 28 into the ioat chamber. This operation continues until suii'cient water accumulates in the reser- J voir to elevate the float until the springs 22 and 23 pass. above the pivotal connections of the levers when the free end of the' lever 19 will' be thrown down against the stop 36 `and permit the inlet valve to seat, after whichthe pump will again discharge through the pipe 35.

It will be apparent to those skilled in the art that I have provided a device which l absolutely prevents the feed pump from drawing in air whenthe water supply fails` sincethe trip mechanism will be operatel and the inlet valve held open before the water lever falls to such a point that the pump may drawfin air. v

Vhile I have described an embodiment; of my inventionA in which the valve controlling means is floatactuated, it is to be understood that I am not to be limited to the exact mechanism shown but claim as voir having'l my invention anyv equivalent means that may fall Within the scope of my claims.

What I claim as neu7 and desire to secure by Letters Patent is:

l.- In a device of the class described, the combination of a pump having valve controlled intake and discharge passages, a fluid reservoir connected to the intake passage, and means for holding the intake valve open when the Huid in the reservoir falls to a predetermined level.

2. In a liquid circulating system,` the combination of a casing constituting a resera supply opening, a pump mounted on the casing having intake and discharge passages with a valve controlling ach of said passages, the intake passage coml municating with the casing, and a float and plying water thereto, a pump having an v valve control means operable thereby mounted in the casing for controlling the intake valvev and passage to prevent the discharge of liquid through 4the discharge valve of the pump when the liquid in the reservoirfalls to a predetermined level.

3. In a device of the class described, the combination of a pump having intake and discharge passages, valves controlling the respective passages, a reservoir from which the pump receives its supply connected to the intake passage, means for'supplyin fluid to the reservoir. and means controlle by the level of the fluid in the reservoir for holding the intake valve open when the fluid falls to a predetermined level.

4. In a device of the class described, the combination of a pump clyinder having valve controlled intake and discharge passages, a receiver connected to the pump cylinder in communication With the intake passage, a float in the receiver, r,means for supplying'liquid thereto, and means operatively connecting the float and intake valve Whereby the valve may close when the liquid is above a predetermined level and is held open by the float When the liquidis below a pre.

determined level. l

5. In a device of the class described, the combination of apump having intake and Idischarge passages, valves controlling the re-v spective passages, a reservoirI connected to the inlet passage, a. lloat in the'reservoir adapted to rise and fall with the level of the liquid therein, means for supplying liquid to the reservoir, and means `actuated by the float to hold the intake valve from its seat when the oat falls below a predetermined level and to permit the ,valve to-seat WhenV the `float rises above another predetermined4 level. 1 i

6. In a'pump controlling device, the combination of a water reservoir, means for supot the lever. a second lever pivoted interme- 75 diate its ends to the support, a valve actuating plunger adapted to engage one end of the second'lever, and resilient means connecting the. other end of the second lever to the first named lever intermediate its ends. 8U.

system for In a water circulating steam power plants, the colnbination of a reservoir, means for supplying water to said reservoir,means for pumping water from the reservoir to a boiler in the system, and 'S5 means for causinflr the pump to return Water to the reservoir w ien the Water supply means for the reservoir fails.

9. In a Water circulating system for steam power plants, the combination of a reser- "l voir, an inlet for supplying Water to the rescrvolr, a pump for taklng Water out of the reservoir, and means for causing said pump to return water to the reservoir when the supply therein diminishes to a predeter- 95` mined level.

l0. In a water circulating system, the combination of a supply reservoir, means for feeding Water to the reservoir, means for pumping water therefrom, and automatical- 100 said pumping ly acting means for causing means to`return water to the reservoir when the supply therein becomes diminished a predetermined point. I

1l. In a Water circulating system, the com- 105\"\fbination ofv a supply reservoir, means for feeding Water to the reservoir, a pump for taking water from the reservoir, and means in thereservoir for automatically controlling y the pump to cause it to return supply reservoir when the amount of water contained therein diminishes to a predetermined point. v

12. In a Water circulating system, the combination of a supply reservo1r,":a constantly 15 acting pump for taking water from'the reservoir, and means for controlling said pump to cause it to return Water to the reservoir when the supply therein diminishes to a pre'- determined extent.

In testimony WhereofI atiix my signature.

GUSTAF- W. ENGSTROM.

the 65 water to the U"

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