US1925436A - Valve - Google Patents

Description

B. F. DOWD Sept. 5 1933.

VALVE Filed Jan. 7, 1932 IVENTOR. .Bezyamm F1290 we],

A TTORNEY.

Patented Sept. 1933 v, U IT D STATES PATENT OFFICE Application January 7, 1932. Serial 585,265

-6 Claims. (01. 277-43) This invention is a valve provided with a bytively communicate with the casing space-at oppass; and has for its object to embody the valve posite sides of the medial partition, with the valve and by-pass in a unitary structure having means 4 adapted to open by pressure of a flow supplied for closing the by-pass and directing flow past the at inlet port 5 so as to permit discharge at outlet valve for regulating the flow at the valve, or port 6, and adapted to be closed against the pres opening the by-pass and shutting-off flow to the surefor shutting-off the flow. valve so that the flow may continue through the The valve 4 may be actuated in any suitable by-pass While the valve is inoperative. manner; and in the illustrated embodiment of The combined valve and by-pass is of general the invention showing the valve employed as a utility but is particularly applicable to a confeed water regulator for a boiler,'it is actuated by struction wherein the .valve is automatically concontrol mechanism which is movable in accordtrolled, so that with the by-pass closed the valve ance with the water level in the boiler. The conis adapted to automatically regulate the flow; trol mechanism may be of the type described and and with the flow to the valve shut-off, the byclaimed in my U. S. Patent No. 1,826,058, of 00- i pass provides for manually regulating and contober 6, 1931, in which case it comprises a valve tinuing the flow while permitting removal and stem 7 adapted to abut against valve 4 and slidreplacement of the valve and its automatic conable in a sleeve 8 which may be'detachably control. nected to a nipple 9 projecting from one side of As an instance of use of the valve it may be valve casing 1 at the axis thereof, with the valve;

embodied ina feed water regulator for a boiler, stem '7 reciprocated in sleeve 8in accordance with. 5 with the valve actuated by any usual control variations in the water level in a boiler (not mechanism movable in accordance with the washown), so that projection of the valve stem into ter level in the boiler and contained in a suitable casing 1 closes valve 4 against the pressure of the housing which projects from the valve casing, flow, while retraction of the valve stem permits;

and the valve casing having an inlet for feed wa-' the valve to open responsive to the pressure of the ter and an outlet leading to the boiler, whereby flow. The means for reciprocating valve stem 7 the valve normally automatically regulates the comprises a tube 10 projecting from sleeve 8 and feed water supply to the boiler in accordance with surrounding the valve stem,'with the tube termithe water level therein, or by shutting-01f the nating in a coupling 11 to which stem 7 is adflow to the valve and opening the by-pass the justably fixed as shown at 12. Conduits 1 314 feed water may be manually regulated while peropen into sleeve 8 and communicate respectively mitting removal of the valve and its control with the water space and the steam dome of the mechanism for repair or replacement. 1 boiler; and the tube 10 and valve stem 7 are of Further objects of the invention will be readil ,materials such as suitable metals having appre- 2 understood from the following description of the ciably different coefiicients of expansion, so that accompanying g, in whichf longitudinal expansion and contraction 'of the Fig. 1 is a side elevation of a feed waterre'gtitube, which has a relatively high coefiicient of lator for a boiler, with the improved valve adaptexpansion, reciprocates the valve stem which has ed to regulate the feed water supply and operaa substantially negligible coefiicient of expansion. r

tively assembled with relation to control mecha- The inlet and outlet ports 56 of the valve casnism which is actuated in accordance with the ing are connected respectively to pipes '15.16, water level in the boiler. with the pipe 15 communicating with a source of Fig. 2 is a front elevation of the valve. feed water supply and the pipe 16 leading to-the Fig. 3 is a vertical section on the line 3-3 of boiler; and the tube 10 of the automatic control 1 45 I v 'proj ects substantially horizontally from valve cas- Fig. .4 is a vertical section on the line 44 of ing 1 at approximately the normal water level in Y 9 the boiler. .The. tube 10 thus contains either steam The improved valve comprises a preferably or water depending upon'the fall or rise of the I cylindrical casing 1 having a medial transverse water. level in the boiler; and when it'contains 0 partition 2 supporting a valve seat 3 at the axis of steam the tube 10 expands so as toretract valve the casing. -A valve 4 cooperates with the valve stem 7-for opening valve 4 to supply feed water to seat for regulating flow from one side to the other the boiler until the normal level is again reached. of the medial partition, and diametrically oppo- The steamin tube 10 is thus replaced by water, so site ports5-6 open through the peripheral wall that tube 10 contracts and thereby projects valve 1 of the Casing and as hereinafter described respecstem 7 for closing valve 4 so as to shut-on. the feed water supply until the water level in the boiler is again lowered.

Referring now to the construction of valve casing 1, the ports -6 are arranged for communication with opposite sides of medial partition 2 by recessing the medial partition adjacent the respective ports as shown at 17 and 18, with walls 19-20 extending from the margins of the respective recesses to opposite end walls of the casing as shown in Fig. 3, so that port 5 communicates with the casing space in back of the medial partition while port 6 communicates with the casing space in front of the medial partition, and valve 4 controls the flow from one side to the other of the partition.

The casin 1 is also arranged so as to form a bypass around valve 4, with the by-pass having a manual control whereby in lieu of the automatic control at valve 4 the flow may be manually regulated via the by-pass; and when the by-pass is in use the flow to valve 4 may be completely shut-oh so that sleeve 3 and valve may be removed for inspection and replacement while continuing the flow through the by-pass.

For'this purpose the space in back of partition 2 is divided into two separate compartments by a wall 21-22-23, and the space in front of partition 2 is similarly divided into two separate compartments by a wall 24-25-26. As shown in Fig. 4, the walls 22-25 comprise oppositely disposed semi-circular structures each surrounding one-half of the valve seat 3 and together defining a complete circle, with walls 2-3-23 in superimposed alinement and projecting laterally to the outer periphery of easing 1- at one side of the circle, and walls 21-24 projecting in opposite directions from the opposite side of the circle and extending longitudinally to the outer periphery of easing 1.

The space in back of partition 2 thus communicat'es at 2'? with the inlet 5, but is shut-oil from valve seat3 by the wall 22, and extends around opposite sides of the casing with its end 28 shut-off by the wall 21 and its opposite end 29 shut-off by wall 23.

The remainder of the space in back of partition 2 and shown at 30, is thus shut off from the space 27-28-29, but is open to valve seat 3. In similar manner the space in front of partition 2 comniunicates at 31 with outlet 6, and is shut-off from valve seat 3 by wall but extends around opposite sides of the casing with its end 32 shut-ofi by wall 24 and overlying space and its opposite end 33 shut-off by wall 26 and overlying space 30. The remainder of the space in front of partition 2 and shown at 34, is thus shut-off from the space 31-32 but is opento valve seat 3 andoverlies the space -29.-

Valve seats 35, 36 and 37'are formed in partition 2, and respectively provide communication betweenthe spaces 23-32, -33 and 29-34; and

valves 33, 39 and 40 cooperate with these respective valve seats. The valves are operatedby valve stems ii which project through usual bonnets 42 on the valve casing 1, and the valves are respectively operated by usual manual controls 43, 4.4and 45.

- It will thus be seen that the valve 4 regulates flow from the space 34 to the space 30; and when the .valve 4 is thus employed for regulating the flow, the-valves 39 and Y40 are opened and the valve '38 is closed, so that the flow is from inlet 5 via space '27-'29, past open valve 40 to space 34;from whence its flow to space 30 is regulated by valve '4, with the flow discharging from space 30 past the inlet 6.

open valve 39 and thence via space 33-31 to the When for the purpose of inspection, repair or At the same time the flow from space 27 replacement it is desirable to removevalve 4', the

flow may be shut-off from valve seat 3 by closing the valves 39 and 40, it being understood that the valve 38 remains closed, if it is desired to shut-off the flow through the entire system. By thus closing valves 39 and 40 the incoming flow through space 21-29 is shut-oi? from the space 34 which communicates with valve seat 3, and in similar manner by closing the valve 39 the flow which may'back up in the space 31-33 is prevented from entering the space 30 which communicates with the opposite side of the valve seat 3, c

If, however, when thus rendering the valve 4 inoperative, it is desired to by-pass the floW around said valve, the valve 38 is opened when the valves 39-40 are closed. With valves 39-40 thus shut-off, the valve 38'may be adjusted Ior manually regulating the flow through the bypass which is formed around the inoperative valve 4. by-pass comprises communication via the open valve 38 from the space 28 to the space 32, it being noted that the space 28 is in communication with the space 27 which receives the incoming flow, and that space 32 is in communication with the space 31 from whence the flow is discharged at outlet 6; ,A manually regulated by-pass which is entirely separate from the main valve 4 is thus provided by opening the valve 38 and at the same time closing the valves 39 40,

while on the other hand the main valve 4 is ren-' dered operative and the by-pass is shut-off by closing the valve 38 and opening the valves An extremely simple valve structure is provided- Whereby a valvular control and a by-pass around the valvular control may be embodied'in a unitary valve casing, with the medial partition of the valve casing and the walls at the opposite sides of the medial partition preferably all cast inte gral with the valve casing.

In practice the ports 5 and 6 may be provided with suitable identifying marks as shown at 50 so as to readily indicate the proper operativeasseinbly of the valve structure in a flow circulating system, it being noted that in the illustrated embodiment of the invention the valve structure is assembled so that the'pressure of the incoming flow tends to open valve 4 and the valve is closed.

lating system wherein it is preferable to close valve 4 by the pressure of the flow, in which case a v a q 1. In combination, a valve casing, a med alpartition in the casing, ports in the casing communicating respectively with the spaces at opposite sides of the partition, a valve seat in the partition, a valve cooperating with the seat, a wall in each of the spaces at opposite sides of the parpartition being closed to the valve seat and open to that port which communicates with the space at the corresponding side of the partition, a portion of each of the first mentioned compartments o'verlying'a portion of the second men tioned compartment which is at the opposite side of the partition, openings in the partition providing communication between each pair of said overlying compartments, portions of the second mentioned compartments at opposite sides of the partition overlying one another, an opening in the partition providing communication between said last mentioned overlying portions of the second mentioned compartments, valves for the respec-' tive openings in the partition, and means for operating said last mentioned valves from the exterior of the valve casing.

2. In combination, a valve casing, a medial partition in the casing, ports in the casing cominunicating respectively with the spaces at opposite sides of the partition, a valve seat in the partition, a valve cooperating with the seat, a wallin each of the spaces at opposite sides of the partition dividing each of said spaces into two compartments, one of the compartments at each of opposite sides of the partition communicating with the valve seat and being closed to that port which communicates with the space at the corresponding side of the partition, and the other of the compartments at each of opposite sides of the partition being closed to the valve seat and open to that port which. communicates with the space at the corresponding side of the partition, each of the first mentioned compartments having a passageway communicating with the second mentioned compartment which is at the opposite side of the partition, the second mentioned comeach of opposite sides of the'partition communieating with the valve seat and being closed to that port which communicates with the space at the corresponding side of the partition, and the other of the compartments at each of opposite sides of the partitionbeing closed to the compartments having a passageway communivalve seat and open to that port which communicateswith the space at the corresponding side of the partition, each of the first mentioned eating with the second mentioned compartment 'which is at the opposite side of the partition,

and valves for the respective passageways.

4'. In combination, a valve casing, a pair of ports in the casing, a partition in the casing, a valve seat in the partition, a valve cooperating with the seat, a wall in the space at one side of the partition dividing said space into two compartments, one of said compartments communicating with the valve seat and being closed to one of said pair of ports and having a pas vsageway leading to the other of said pair of ports, the other of said compartments being closed to the valve seat and open to the first mentioned port, the last mentioned compartment having a passageway communicating with the space at the opposite side of the-partition, and a valve for said passageway.

5. In combination, a Valve casing, a medial partition in the casing, ports in the casing communicating respectively with the spaces'at oppo- 0 site sides of the partition, a valve seat in the partition, a valve cooperating with the seat, a wall in each of the spaces at opposite sides of the partition dividing each of said spaces into two compartments, one of the compartments at each of opposite sides of the partition communieating with the valve seat and being closed to that port which communicates with thespace at the corresponding side of the partition, and the other of the compartments at each of opposite sides of the partition being closed to the valve seat and open to that port which communicates with the space at the corresponding side of the partition, each of the first mentioned compartments having a passageway communieating with the second mentioned compartment which is at the opposite side of the partition, and a valve for one of said passageways.

6. In combination, a valve casing, a pair of ports in the casing, a partition in the casing, a 1

valve seat in the partition, a valve cooperating with the seat, a wall in the space at one side of the partition dividing said space into two compartments, one of said compartments communicating with the valve seat and being closed to one of said pair of ports and having a passagewayleading to the other of said pair of ports, the other of said compartments being closed to the valve seat and open to the first mentioned port, the last mentioned compartment having a passageway communicating with the space at the opposite side of the partition, said'last mentioned compartment also having a passageway communicating with the second mentioned port, and 13 valves for the respective passageways.

BENJAMIN F. Down.

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