US1573931A

US1573931A - Priming system for centrifugal pumps

Info

Publication number: US1573931A
Application number: US51449A
Authority: US
Inventors: Charles H Goyne
Original assignee: GOYNE STEAM PUMP CO
Current assignee: GOYNE STEAM PUMP CO
Priority date: 1925-08-20
Filing date: 1925-08-20
Publication date: 1926-02-23
Anticipated expiration: 1943-02-23

Description

Febo g C. H. GOYNE PRIMING SYSTEM FOR CENTRIFUGAL PUMPS Filed Aug. 20. 1925 2 Sheets-Sheet 2 Inventos 0a@j @gy/7e a@ ma# Cil Patented Feb, 23, 192e.

UNITED STATES .PATENToFFIca CHARLES H. GOYNE, F ASHLAND, PENNSYLVANIA, .ASSIGNOR T0 GOYN E STEAM.'

PUMP CO., OF ASHLAND, PENNSYLVANIA, A CORPORATION 0F PENNSYLVANIA. l

PRIMING SYSTEM FOR CENTRIFUGAL PUMPS.

. Application sled August 2o, 1925'. 'serial No. 51,449.

` .To all wiz-0m it may concern.'

, 143e it known that l, QHARLES H. GoYNE, a citizen of the ,United States, residing at Ashland, in the county of Schuylkill and State of Pennsylvania, have invented certain new` and usefullmprovements in Priming Systems for Centrifugal Pumps, of which thefollowing is a specification, reference being' had' -to lthe accompanying drawings.

This invention relates to priming systems .for centrifugal pumps. i

An important object of the invention is to provide a device of this character which will free the pump of all air and insure a proper priming thereof.

A further object of the invention is to provide in a `device of this character, in

" which. apriming pump is employed. for

exhausting air from the-centrifugal to prime 'the same, a system which is free from openings and in whichrraccordingly a head of water may be maintained in priming corresponding to the degree of vacuum produced by thepriming pump, thereby elimif nating surging of the waterin the centrifu? gal and in connections `between the centrifugal and priming pump.

A further object of the invention is to provide in a' device of this character anovel and improved means for relieving the system as soon as the centrifugal is started and l pressure pr duced thereby.

A still `further object of the invention is t0 provide yal floatucontrol means regulating the application of vacuum produced in the prlming pump to the centrifugal so constructedI that'it isimpossib-le for-water to enter the priming pump during the priming operation or at any time thereafter.

A still further object'of the invention is to provide means for relieving the priming column when the centrifugal is started to release allv water vconta-ined therein and thereby prepare the system for a second priming operation.

Theseandother objects I attainl by the construction shown inthe. accompanying drawings, wherein for the purpose of illustration is shown a preferred embodiment' of my invention and wherein :--v

, Figure 1 is a'. sideelevation partially diagrammatic showing apumping system con l structed inaccordance with .my mventlon with the parte h1 th positive which they lconstruction,` this pum occupy when the pump is primed and the centrifugal started but not yet under pressure;

Flgure 2l is a vertical sectional View through the. regulator;

Figure 3 is an enlarged vertical sectional view through the impulse valve;

Figure 4 is a detail view partially in section of the drain valve. v

Referring now more particularly to the drawings, the numeral 1() generally'` desig nates a centrifugal pump of any suitable being driven by a motor 1-1 or other suita le .pr-imc mover. In the present instance, the pump is illustrated as a two stage pump of which the impeller chamber of the first stage is indicated-at 12, the impeller casing of the second stage at 13 and the cross-over connection of the intake of the second stage and the exhaust of the first stage at 14. The numeral 15 designates an air pump driven lby a motor 16, the i pump being of any suitable character.

In accordance with my invention, I provide a regulator 17 including an intake and float chamber 18 within which operates a float 19. The outlet of the inner chamber `communicates with a lever through the walls of which is directed a shaft 21 upon which is pivoted a lever, 22,

Qne end of which is connected by a link 23 with the float ball 19.

The lever chamber has projecting there-` into above the opposite end of the lever 21 the Walls 24 of an outlet passage 25. In alignment with the end of the lever, these walls have formed therein openings 26 in which operate a cylindrical valve element 27 pivotally connected to the opposite end of the lever, as at 28. This valve has its ends closed, vas indicated at 29, and is provided with a central partition 80 spaced from the upper end wall 29 a distance equal to the spacing of the walls 24 of the outlet 25.

Adjacent each end partition, the walls of the valve have formedvtherein. openings 31 and upon opposite sidescf the central partition have formed therein openlngs 32.

When the valve is in the open position, the'

openings

31 and 32 at each side of the partition are arranged upon opposite sides of the walls-24 so that the lever chamber is in communication with the outlet and the inlet is-likewise in communication with-the outlet' When, however, the ball 19 rases Wlthchamber 20 in the chamber 18, the

Walls

29 and 30 align with the walls 24 and the outlet 25 is sealed from the lever chamber 20 and inlet and float chamber`18. I further provide. what I term an impulse valve 33, this valve com?,

prising la casing having main and

secondary inlets

34 and 33 and an outlet 36. Between the inlet 34 and outlet 36 a valve seat 37 is arranged facingl toward the inlet and this seat has operating 'therein theguide 38 of a valve 39 for coaction with the seat 37. The

for placing either

inlet

34 or 35 in coinmuni.

cation with the outlet 36.

`In making the connection for employing my pumping system, the inlet 34 of the valve 33 is connected with the high point ofthe impeller casing of the high pressure stage of the pump or in the present instance with the high point of the impeller casing 13 by a conduit 42. The remaining high points `of the pump are connected with this conduit 42 by conduits 43, each having arranged therein a check valve 44, such a conduit 43 being supplied for each of thel low pressure stages and for the cross-over vconnection 14. The outlet 36 of the valve 33 is connected with the intake port of the intake chamber 18 by a ,conduit 45. This conduit y has preferably arranged therein a T 46 communicating with a vertical leg 47, the lower end of which has an outwardly Opeliing check valve 48, the purpose of which will presently appeai. The exhaust passa ge` 25 ofthe regulator is connected with the intake of the pump' 15 by a conduit 49.

In the use of the device, thefpump 15 being in operation, a vacuum is created in the conduits 49, 45, 42 and since the'checkA fvalves 44 opentoward the conduit 42 in the A conduits 43 and accordinglyin all of the. high points of the centrifugal, this vvacuum `causes Water. to rise into the centrifugal and conduit 45 until it engages with the float 19 and elevates the same suliciently to cause closing` of the valve 27. This immediately cuts off the vacuum of lthe ump 15 and the water ceases to rise but i-nvevent any air should leak about thestufiing boxes of the centrifugal and enter the same before the centrifugal is started and thus permit the 00 water level to lower in the float chamber' 18, the valve will be immediately opened and the suction brought into operation to restore the Water to its proper level. Starting of 'I vthe centrifugal is referably but not neces- .eerily aecemplshe by mais et a twitch generally designated lat 50, and operated from an arm 51 secured to the pivot shaft 2] of the lever 22. When the pump is start-1 ed, pressure generated Within thel pump will act through the c'onduit 42 upon the valve 39, vcausing this valveto close and the valve 40 to open so that the conduit 45 is'removed from communication with the centrifugal and placed in communication with the atmosphere.' Since the conduit 42 ,is under pressure from the high stage, the 'pressure generated Within this conduit will cause the check preferably provided for it prevents passage of wa er over the centrifugal and its possible contact with a switch 52, the vpurpose of which is now to be described.

The switch 52 is an ordinary closed circuit jack switch; the movable arm 53 of which is arranged in the path of movement -of a continuation 54 ofthe stem \41 above the upper end of the valve 40. When the valve is in its raised position and disengaged from its'. seat, this" continuation operatively engages the arm 53 to open the circuit of the switch 52; This switch is arranged in one side of a Vmotor circuit 55 of the motor 16 and' accordingly this motor circuit is broken when the valve 40 is opened and the pump 15- is brought to a stop. This motor circuit 55v preferably further includes a handoperated switch 56 by means of which thecircuit may be manually broken.

It will be seen that'with the-construction employed, it is not possible for any of the priming water to reach the pump 15 and this is an important feature of the construction for the reason that devices of this character are usually employed in pumping the sump of mines and accordingly the Water being, handled is very dirty and capable of causing` considerable damage to a small pump of this character. It will furthermore be obvious that a perfect prime of the centrifugal willA be maintained at allt'iines when the pump 15 is in operation and that the systemV employed f provides an eiiicient drain for. removing the vpriming,Walter after each priming operation v to preparethe system for a further operation. -Attention is directed to the fact that by reason of the construction` and mounting awarethat systems somewhat" resembling the system hereinbefore set forth have been em- -ployed but in gill of these systems with which the float operated valve to act in devices of the character disclosed byr Lorenz to relieve the suction of the priming pump after the centrifugal has been started and in event the priming pump continues in operation. It will be noted that in the construction'in accordance with my invention, after the portion ofthe priming connection'between the valve 33 and regulator 1T has been relieved through the valve 40, the valve 27 will be opened by the discharge of water from this portion of the connection and since this portion of the connection is then opened to the atmosphere,the pump 15 will be relieved. The valve 27, therefore, serves after the operation of the impulse valve 33 as an unloader valve. This valve is never subjected to the pressure ofthe discharge from the centrifugal and is accordingly freely operable at all times. 4

The construction hereinbefore set forth is obviously capable of a certain range of change and modification without materially' departing from the/spirit of the invention andl I accordingly do not limit myself to the specific structure except as hereinafter claimed.

I claim 1. In a priming systeln for centrifugals and in combination with a centrifugal, a

`priming pump f therefor. a connection be-' tween a high point of the centrifugal and the priming pump including a valve automatically segregating the centrifugal and priming pump when the centrifugal 1s primed and before it is started and means in said connection between the centrifugal and valve automatically segregating the centrifugal and valve. when the centrifugal is started and placing that portion of the connection between said means and valve in communication with the atmosphere.

2. In a priming system for centrifugals and in combination with a centrifugal. a priming pump therefor. a connection between a high point of the centrifugal and the priming pump including a Valve automatically segregating the centrifugal and priming pump when the centrifugal is rimed and before it is started and means 1n said connection between the centrifugal and valve automatically segregating the centrifugal and valve when the centrifugal is started and placing that portion if the connection between said means and valve iu con'imunication with the atmosphere and rendering the priming pump inoperative.

3. In a priming system for centrifugals and in combination with a centrifugal` a priming pump therefor, a connection between a high point ofthe centrifugal and the 4priming pump including a `valve automatically segregating the centrifugal and priming pump when the centrifugal is primed and before it is started, means in said connection between the centrifugal and valve automatically 'segregating the centrifugal and valve when the centrifugal is started and placing that portion of the connection be tween said means and valve in communication with the atmosphere and means operative to drain said portion of the connection when placed in communication with the at mosphere, the first named valve operating as an unloader valve for the priming pump when said portion of the connection is drained.

4. In a pump system, a centrifugal pump, a priming pump therefor, a balanced float operated valve arranged in the connection between said pumps and an impulse valve' arranged in said connection between the float operated valve and the centrifugal pump and operated by pressure generated by the centrifugal pump to close communication between the centrifugal pump and the fioat operated valve and to place the portion of the connection between the float and impulse valves into communication with the atmosphere and means draining said portion of the connection when placed in communication with the atmosphere.

5. In a pump system, a centrifugal pump, a priming pump therefor` a balanced float operated valve arranged in the connection between said pumps and an impulse valve arranged in said connection between the float operated valve'and the centrifugal pump and operated by pressure generated b v the centrifugal pump to close communication between the centrifugal pump and the float operated valve -and to place the portion of the connection between the float and impulse valves into communication with the atmosphere and means draining said portion of the connection when placed in communication with the atmosphere, said float operated valve opening to place the priming pump in comn'iunication with said portion of the connection when said portion of the connection is drained to thereby relieve the priming pump upon continued operation thereof.

In a priming system for centrifugals and in combination with a centrifugal. priming pump therefor, a connection between a high point of the centrifugal and 'the priming pump including a valve automatically segregating the centrifugal and priming lpump when the centrifugal is primed and before it is started, means in said connection between the centrifugal. 7^and vakje automatically segregating the centrifugml and valve when the centrifugal is started comprising a casing having an inletr comn'mnicating With the high point of the centrifugal, a second inlet communicating with the atmosphere, an outlet communi-v cating with the first named valve andy valves for controlling said inlets connected for simultaneous ope "ation, l

7. ln a pump system, a centrifugal pump, n priming pump therefor, a Valve arranged in the connection between said pumps, a float for operating the valve, an impulse valve arranged in said connection between the first named Valve and the centrifugal pump automatically closing as the centrifugal comes into operation, a motor for operating the priming pump, a circuit for the motor including a normally closed switch and means operated by the closing of the impulse valve. for opening said switch.

In testimony whereof I signature.

CHARLES H. GOYNE.

hereunto affix lmy