US2056994A - Force pump - Google Patents

Description

l G. WOODS Oct. 13, 1936.

FORCE PUMP .Filed Dec. 19, 1954 WAfg FQ.

. [N I/ EN TOR r eo//ge M/oods A TTORNEY Patented Oct. 13, 1936 i UNITED STATES PATENT OFFICE 1 Claim.

My invention relates to force pumps, more particularly reciprocating force pumps in which the uid is drawn by vacuum pressure, and the objects of my invention are:

First, to provide a force pump in which the fluid is boosted in the main pump tube by jetting action from the discharge of a conventional force pump to a position where it will be raised by a conventional force pump by atmospheric pressure;

Second, to provide a force pump of this class in which fluid such as water may be raised from a depth considerably more than in the conventional force pump;

Third, `to provide a pump of this class in which iiuid such as water may be raised from considerable depth without the necessity of plunger rods and other inconvenient structures within the main pump tube;

Fourth, to provide a pump of this class in which the discharge from the pump is utilized for boosting the iiuid such as water in the main pump tube to varying heights depending upon the pump pressure from the discharge of the pump;

Fifth, to provide a new and novel means for priming pumps of this class; and

Sixth, to provide a pump of this class'which is very simple and economical of construction, du" rable, eicient in its action, easy to operate, and which will not readily deteriorate or get out of order. A

With these and other objects in view as will appear hereinafter, my invention consists of certain novel features of construction, combination and arrangement of parts and portions as will be hereinafter described in detail and particularly set forth in the appended claim, reference being had to the accompanying drawing and to the characters of reference thereon which form a part of this application, in which:

Figure 1 is a fragmentary side elevational view of my pump complete showing some of the parts and portions broken away and in section to i'acilitate the illustration, and Fig. 2 is an enlarged sectional view of a fragmentary portion of the jet and valve structure near the bottom of the main pump tube.

Similar characters of reference refer to similar parts and portions throughout the views of the drawing.

The conventional suction pump I, pump discharge pipe 2, pump discharge pipe valve 3, pressure gage 4, main pump tube 5, eiector tube 6, ejector tube valve 1, ejector nozzle 8, re-

ducer member 9, dapper valve member I0, partition ll, and pump strainer l2, constitute the principal parts and portions of my force pump.

The pump l is preferably a compound force pump shown in symbolized form in accordance with the rules of practice, and'connected with the inlet of said pump is the main pump tube 5 and with the outlet of said pump as the discharge or outlet tube 2 from said'pump l. Mounted in this discharge tube 2 is a valve 3 which is adapted to regulate the ow from said discharge pipe and 10 close the same if desired. Mounted between the outlet of the pump l and the valve 3 in communication with the discharge tube 2 is a pressure gage i which is adapted to indicate the pressure in the discharge pipe 2. The main pump tube 5 may be of conventional type and it is provided near its lower end with a reduction member 9 which reduces the diameter of the pipe at the smallest point of this reduction member 9 to approximately one-half the diameter of the main tube 5 and this member 9 is preferably provided with an upwardly converging wall, as shown best in Fig. 2 of the drawing. Interposed centrally in this member 9 is the nozzle 8 of the ejector tube 6. 'Ihe nozzle opening is approximately one-third the diameter of the opening of the member 9. This nozzle 8 communicates with the ejector tube 6 through the side of the main pump tube 5, as shown best in Fig. 2 of the drawing, where it is secured thereto either by brazing or other suitable method. This tube 6 extends 30 upwardly preferably along the side of the tube 5 and connects with the discharge tube 2 between the outlet of the pump l and the valve 3, as shown in Fig. 1 of the drawing, and there is preferably provided a valve' 'l in this tube if it is desired to regulate the ow, although it is ordinarily not necessary to do this.

Positioned across thetube 5 and below the nozzle 8 and memberl 9 on an angle between the transverse and longitudinal axes of said tube is a partition Il which is provided with a central opening l la. therein and hinged on the upper side near the lower edge is a fiapper valve l0 which is adapted to close said opening when the fluid is still in the tube. It will be noted that this valve member I0 rests against `the curved portion of the tube 6 when fully open, as shown in Fig. 2 of the drawing, and is so positioned when fully open against the tube that it tends to close by gravity but will readily open with the flow of the uid upwardly in the tube 5.

Positioned on the upper surface of the partition Il around the opening Ila is a rubber valve seat Hb against which the iiapper valve member l seats. The'lower end of'the tube 5 is preferably provided with a screen l2 to screen out coarse material at the lower end of the pump tube 5. However, this is not necessary."

Applicant has found that where the pump tube is approximately one hundred feet in length, a suitable sized tube isthree inch diameter for the tube 5, the tube 6 one inch in diameter, the discharge tube approximately three inches in diameter, the outlet through the member 9 approximately one and one-half inches in diameter, and the nozzle opening 8 approximately onehalf inch in diameter. However, these may be varied to suit varying conditions and depth.

The operation of the pump is as follows: The pump I is started in operation-the valve 3 closed, the valve 1 remaining open at all times. The operation of the pump therefore creates a pressure in the discharge tube 2 causing the ow of water through the tube 6 and out through the nozzle 8 forming an ejector which forces the water from the bottom of the tube upwardly, the pressure showing on the gage 4 and causing the needle of the gage to vibrate. As soon as suiiicient pressure is built up ,and the water is raised in the tube 5 to sucient height to cause complete priming of the pump, the valve 3 is opened and the pump proceeds with operation and the ejector boosting the water to a position in the tube 5 where it is operated by suction lift through the force pump l and in which continuous operation may take place. Some of the water passes through the discharge tube 2 for service and some of it passes through the tube 6 for boosting purposes. When the pump is going in operation, the water is drawn up through the partition l I holding the valve Ill open. However, when the flow through the tube 6 ceases, the valve I0 will close holding the water in the tube 5.

Though I have shown and described a particular construction, combination and arrangement of parts and portions, I do not wish to be limited to this particular construction, combination and arrangement, but desire to include in the scope of my invention the construction, combination and arrangement substantially as set forth in the appended claim.

Having' thus described my invention, what I claim as new and desire to secure by Letters Patent is:

In a force pump, a pump structure, a main pump tube extending downwardly therefrom connected with the inlet of said pump. a discharge tube connected with the outlet of said pump, an ejector tube communicating with the discharge tube and provided with an upwardly directed nozzle positioned in thelower end of said main pump tube, a reducing member mounted-in said main pump tube surrounding said nozzle, a valve in said discharge tube outwardly from the connection of said ejector tube, and a apper valve positioned in said main pump tube on an angle between the transverse and longitudinal a'xes of said tube.

GEORGE WooDs.

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