US1625500A - Pump - Google Patents

Description

April 19, 1927 l M. J. QUINN PUMP Filed Nov. 21, 1923 4 sheetssheet a prvil 19 1927. A 1,525,500

M.IJ.QU|NN PUMP Filed Nov. 2l, 1923 4 Sheets-Sheer?l 3 /MIS Q i 49 5/ ii I n ii I w 2f 4f mi ff? l 4 W5 i ze 'il 48 f WH 5 5.5 4 57 l 1,625,500 Aprll 19, 1927. M. J. QUINN l l PUMP Filed Nov. 21, 1925 4 sheets-sheet 4 Patented Apr. 19, 1927.

UNITED STATES MARTIN JOSEPH QUINN, OF TORONTO, ONTARIO, CANADA.

PUMP.

Application led November 21, 1923. Serial No. 676,168.

This invention relates to the construction of single stage compressor pumps, particu? larly ot' the type adapted for domestic uses,

in which thc fluid is drawn through suction o valves, and forced under pressure through discharge valves, and one of the objects of this invention is to simplify the construction of the Valve mechanism by using a single valve chest, in which the valve boxes for the 1o suction and discharge valves are arranged side by side, closed by a single plate which .when removed simultaneously exposes and renders accessible both the suction, and the discharge, valves.

10 this end the cylinder and the valve chest with the intercommunicating fluidways are complete in a single casting and in the preferred construction the valve chest is located above the cylinder. This valve chest is divided by a longitudinal partition into suction and discharge valve boxes connected by ports with the intercommunicating fluid-ways through which, during the operation of the piston, a circulation is maintained from the intake to the discharge.

A further object of the invention is to eliminate the air binding ofv the suction valves and this is accomplished by connect- 1n the suction and discharge sides of the valve chest by a vent through which a diminutive stream of water can be pumped from the discharge side to the suction side, at each operation of the piston, to displace the conlined air on the suction side of the pump and forcel it through to the discharge side.

In the drawings:

Fig. 1 `is a longitudinal sectional elevation of the pumping apparatus,

Fig. 2 is a top plan view of the valve box i Fig. 3 is a section taken on the line 3 3 Fig. 2, v

ig. 4 is a sectional view through one of the valves and its valve seat,

Fig. 5 is a plan view of the vent connecting the valve box of the discharge valves with the valve box of one of the suction valves, and

Fig. 6 is a sectional view on the line 6-6 Fig. 5. Y

Figure 7 is a section on line 7-7 of Fi 6.

Like charactersof reference refer to ike parts throughout the specification and draw- 1n s.

he genera-l construction of the pump in- 'axis of the cylinder.

`novel features of the apparatus.

vulves a cylinder 1 in which is longitudinally movable a reciprocating piston 2, itted with cup leathers, for drawing the fluidthrough the intake or suction valves and forcing it-through the discharge valves. rlhe piston 2 is provided with a piston-rod 3 operating through a stuthng box 4 and a gland 5 secured within the stuiling box by a cap 6. The piston-rod 3 is connected with a cross-head 7 reciprocating in slideways 8 integral with the base 9. The stuiiing box, slideways and base are formed by a single casting and the axes of the stuffing box and cross-head, together with the axes of the gland and stuiiing box cap, are in ixed alignment with each other and when the parts are assembled, are in alignment with the The cross-head 7 is provided with a wrist pin 10 to which is knuckled one cnd of a connecting rod 11. The other end ot' the connecting rod 11 is knuckled to a crank 12 keyed on a shaft 13.

The shaft 13 is journalled in bearings 14 extending upwardly from, and forming part of, the base 9, and mounted on` the shaft 13 is a flywheel 15 to which motion is transmitted from the motor 16 by a belt 17; the belt being tensioned by a belt-tightener 18. Leading from thepoles of the battery 19 to the motor 16 are conductors 20 through which the circuit is closed by a switch 21. The switch is controlled from the fluid pressure governor 22 connected with the high pressure side of the pump by a Huid pressure pipe 23.

All of the foregoing parts may be of any usual or approved construction and are referred to only so far as is necessary to explain the construction and operation of the Overlying the cvlinder 1 is a-valve chest 24 divided lengthwise by a partition 25. On

one side of the partition 25 is the valve box 27 for the discharge Valves and on the other side of the partition are two valve boxes 28 100 and 29 for the suction valves. The valve boxes 28 and 29 are separatedby a transverse partition 26 extending from the suction side of the valve chest to the partition 25. Below the valve boxes 28 and 29 is an intake header' 105 .31 having an intake port '32, and beneath other by a transverse partition 39.

Gil

why heads or plates 40 and 4l. The head 40 is removably bolted to the casting for access to the cylinder and piston but the.

head 4l is part ot' the casting forming the stulling box and its related parts and when assembled with the casting 30 rigidly holds the latter' in its fixed position and maintains the alignment oi" the cylinder, stuliing box and slideways. rl`he header 3l is connected with the valve boxes 28 iand 29 by valve closed ports 43 and 44, and the compartnients 37 and 38 are connected With the valve box 27 by valve closed ports 45 and 4G. During the operation of the piston il a circulation is maintained from the inlake port 32 through the header 31, valve closed ports 43 and 44, ports 35 and 36, compartments 33 and 34, and 37 and 38, and valve closed ports 45 and 46 to the discharge port 42.

rlhis construction, While maintaining; the circulation of the lluid-ways from the intake port to the discharge port, locates the valve boxes 2S and 29 for the suction Valves in the saine horizontal plane as the Valve bon 27 ior the discharge valves, and perniits o all these Valve boxes being covered by a single plate or cap 47 secured to the casting 30 by a single holt 49. is shown in litig. El the partition 2G is connected with the partition 25 interj'acent the ends of the latter; and at the junction ot' the partitions 25 and 26 is a screw-threaded bore 48 into which is enteredthe inner end oli' the bolt 49. ,in the construction shown in the drawings a pressure chamber 5l is integral with the plate or cap 47 and the lower end ot the pressure chamber 5l opens into the valve box 2i through a port 5G. It is not essential, however, that the pressure cha1n her 5l and the plate or cap 47 should he integral lbut this arrangement contributes to the simplicity ot the construction as a sing-le bolt 49 can be used tor securing the plate 4T and the pressure chamber il to the valve chest. F or the correct assembly ol the plate or cap 4T on the valve chest the top edge oi the latter, at some convenient part ol' its surface, is .termed with a hole :'32 into which is entered a corresponding stud 53 projecting from the adjacent surtace of the cap or plate 47 and formed nemmeno through the cap or plate 47 in alignment with the bore 48 is a hole 58 through which is entered the bolt 49.

A convenient method for vassemblingr the parts is to enter the inner end ot' the bolt pressure chamber, and lock them togetheu by a nut 57 fitted on the outer end ot' the holt -49 and tightened until the plate 47 seals the top ot' the Valve chestl This assembly of the cap or plate 47 with the valve chest is of considerable importance inasmuch as access to, and the enclosing of, the discharge and suction valves is obtained by means of a single plate and a single bolt.

Sealing the ports 43 and 44 are spring:r pressed poppet valves 54 and sealing the ports 45 and 46 are spring pressed poppen valves 6U. These Valves are similar in construction and, as shown in Fim 4, each consists ot' a cup-shaped metal disc 61, a valve stein 62 and a fiber or non-metallic disc (i3 interposed between the metallic disc 6l and the valve seat (34. The lower end of the spring G5 is entered in the cup-shaped cavity in the disc Gl and its upper end hears against the under side ot the cap or plate 47. As the general construction of these valves is old the foregoing features are mentioned only to indicate the retention ot' the lowerlend oi' the spring in axial alignnient With the valves.

During the suction stroke of the piston a vacuum or partial vacuum is created in the valve chest and the fluid flowing into the intake chamber 3l through the intake port 32 lifts the suction valves 54 from their seats and enters the valve boxes 28 and 29 and from these valve boxes it passes through the ports and 36 into the compartments 33 and 34. Duringr the pressure stroke ot' the piston the fluid is forced from the compartment 33 into the 'compartment 37v and through' the port 45 into the `valve bon 27, and from the compartment 34 through the compartment 38 and port 46 into the valve box 27; and from the valve box 27 through the discharge port 42 to the pressure chamber 5l.

ln hydroizincuinatic systems it is necessary to auch air into the system through the pum and :tor this purpose an air cock 70 is tte to the compartment 33. illhen the air cock is open the ailY enters the compartment 33 and is forced through lthe port into the valve boa 2i'. t is also torced by the action oih the piston through the port 35 into the valve box 28. rli"`hix accumulated air in the valve box 2S develops saure which prevents the operation ol, suction valve in that particular hex or in ajh-Lair words causes through the yvent the pump to become-air bound. To overcome this a vent connects the valve box 28 with the valve box 27 at or near the top of the partition 25. This vent may consist of a minute hole bored through the partition but in the preferred construction a hole 79 of correspondingdiameter to the plug 80 is?- bored through' the partition and the plug is inserted through this hole. Formed through the plug is a vent hole 81 of a relatively small diameter to minimize the quantity' of fluid passing from the valve box 27 into the valve box 28 but of sufficient diameter to permit of a small quantity being forced from the valve box 27' into the valve box 28 at each pressure stroke of the piston. When 'the cock 10 is open the piston pumps air 1nstead of water into the cock end of the pump and the pumping of air continues until the cock is again closed. During the pumping ot' air the pump, without the vent 81, has a tendency to become air bound in the valve box 28 but with the vvent 81 the action of the piston sucks the `fluid from the intake header :i1 through the port 44 into thevalve box 29 and through the port 36 and compartments 34 and 38 into the valve box 27 lThe pressure within the latter forces a small quantity of water through the vent 81 at each pressure stroke of the piston. Synchronizing with the suction of the piston on the air end of the pump this water, entering through the vent into the valve box 28, d isplaces a corresponding amount of air which it orcesas a result of such displacement 81 on the return stroke of the piston into the valvel box 27 and then through the discharge 42. In the course of time the repeated operation of the pistonl will have foreed'suicient water through the vent to completely displace the air. within the valve box 28 and thus eliminate the trouble resultin from air binding.

Having thus ully described my lnvention, what I claim as new and desire to secure by Letters Patent is: l l

1. A. pump comprising a cylinder, a. piston y within the cylinder, a single valve chest overlying the cylinder, valved suction ports and valved discharge ports, arranged s1 e by side in said chest, a partition separating the valved suction ports from the valved discharge ports and shuttingotl'f communication between them through said chest,'an intake header below and communicating through the valved suction ports with the suction side lof said partition, fluid-ways communicating with the suction side of said partition and through the valved discharge ports with the discharge side of the valve chest, the discharge side of said chest having an outlet above the level of the discharge valves, in ycombination with a single cover for the valve chest enclosing the valved suction and dis,- `charge ports, and rendering both sets of ports and their valves simultaneously accessible when the cover is removed.

. 2. A pump comprising a cylinder, a piston within the cylinder, a single valve chest overlying the cylinder, Valved suction ports and valved discharge ports, arranged side by side in said chest, a partition separating the valved suction ports from the valved discharge ports and shutting otl' communication between them through said chest, an intake header below and communicating through the valved suction ports with the suction side of said partition, fluid-ways communicating 'with the suction side of said partition and through the valved discharge ports with the discharge side of the valve chest, Aand an airvent through said partition connecting the" discharge side of the valve chest with the suction side, whereby the valved suction ports may be prevented from becoming air bound by a portion of the fluid on the discharge side ,of the partition being forced through the air vent to the suction side of the partition to displace .a corresponding quantity of air which escapes through the air Vent from thesuction side to the discharge side of the partition, in combination with a single cover for the valve chest enclosing the valved suction and discharge ports, whereby the removal of the cover renders -both sets of ports and their valves simultaneously accessible.

30th day of October, A. D. 1923.

MARTIN JOSEPH QUINN.

Dated at the sald city of Toronto, thisY

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