US915204A - Pressure-regulator. - Google Patents

Description

T. MONTGOMERY.

PRESSURE REGULATOR.

APPLICATION FILED MAR. Z, 1908.

Patented Mar. 16, 1909.

T Mor/gom w THOMAS MONTGOMERY, or sARNIA', ONTARIO, CANADA.

. PRESSURE-RE GULATOR.

Specification of Letters Patent.

Patented March 16, 1909.

Application led March 2, 1908. Serial No. 418,885.

To all whom it may concern:

Be it known that I, THOMAS MONTGOM ERY, of the town of Sarnia, in the county of Lambton, in the Province of Ontario, Canada, have invented certain Improvementsrin Pressure Regulators, of which the following is'the specification.

My invention relates to improvements in automatic regulating devices for controlling 'fan engines for producing forced or induced drafts for boilers, and the object of the invention is to devise a simple, positive and quick acting valve of this class whereby a uniform steam pressure in the boiler may be maintained continuously.

A further object is to provide a means for cleansing the valve during the running of the engine without detaching any of the working arts. p A still further Object is to make the device operable as a pressure reducing valve.

To effect these objects l have constructed my valve in the manner, which I shall presently describe.

The invention is 'shown in the accompanying drawing which shows a sectional view of the device.

A is a chamber which is designed to be filled with air or other 'expansive Huid from the inlet Aand hermetically sealed, B isa gage which indicates the air pressure in chamber A. 'When the device is used to regulate the speed of fan engines and the like, the pressure of air in chamber A should be the same as the steam pressure required in the boiler. When the device is used to reduce or regulate pressure of gas or Huids,

. as hereinafter described, the air pressure in chamberA should be the same as the pressure required for the gas or fluid to lated.

C is the valve casing, which is laced on the steam line leading from the/bol er to the fan engine and is provided with the oppositely located ports C and C2 into which the pipe line is fitted.

A2 isthe top of the chamber, A and A3 is the central or1iice in the top.

D is a diaphragm supported on the Outer periphery between suitable edge packing rings D.

D2 is a sup lemental be regutop, which is suitably yfastened to t e to A2 preferably around the edge and provide with a'chamber D3 having new and useful 'such aw an opening D4 closed by a screw plug D2.`

with annular corrugations as indicated.

E is a pin having a flanged bottom E, which rests centrally on the plate D.

E2 is av pointed yminor pin held in the to of the pin E and contacting withthe lever F.

It will be noted that the orifice A4 through which the pin E extends is larger than the pin, thereby leaving an annular orifice to allow steam lpressure to act upon the upper side of the diaphragm D as will hereinafter appear. i

lrl is a flanged screw ring, which fits the orifice in the top of the chamber D3.

H is a jaw pin having the aw lowermost, pin extending through the ring H and being held in position at the top by a nut H2. .g The lever F hereinbefore referred to is fulcrumed on a pin G extending through the jaws. of the in H. v

I is a ho ow bearing standard, which is screwed into the bottom of the valve casing C and into the top of the chamber D2.

C3 is the valve rod, which lextends through the bearings, inthe standardvl, and C4 is a double partition forming a chamber in the center of the valve casing C.

, C5 is the double connected valve, the top and'bottom disks of which fit inthe oriiices C2 and C7 respectively in the partition C4 The top of duced screw extension C2.

J is a nut, which is heldk on the flange K at the bottom of the rod K, which at the top is Both the top A2 and the top D2 are provided` pY co the valve is provided with a reprovided with a hand Wheel K2 and extends y through a stuffing box or gland.

J is a spiral spring extending between the' nut J and the stufiing box.

The full steam pressure is exerted on the top-of the diaphragm D. When the steam pressure falls below that of the airipressure in the chamber A the expansion o the air forces the diaphragm 4D upwardly. The movement of such diaphragm is transmitted throu h the lever F and the valve rod C3 to the va ve C5 lifting the lsamefrom its seat and allowing more steam to pass to the engine,- thus increasing in speed,V driving the fan faster, and thereby creating more draft and air pressure and lconsequently raising the steam pressure. When, however, the steam pressure arrives at a Oint above that of the air pressure the diap ragm is forced downwardly. The spring J then forces the valves of steam to the engine `and decreasing its speed and consequently diminishing or shutting olf the draft. The required amount of the lap of the valve on the seat is arranged for by the turning of the hand wheel K2 to the right or left allowing the minimum speed of the engine to be controlled.

:The maximum speed of the engine is controlled by the throttle valve close to the engine.

lf for any reason the valve C5 should stick on its seat or not work freely it may be re lieved by operating the hand wheel K2. Again if any difference in pressure on either side of the diaphragm should become excessive the corrugations in the to A2 and supplemental top D2 will prevent the diaphragm being distorted by being forced too far in either direction.

When I utilize my valve as a pressure reducing device to reduce steam, air or gas from a hi her to a lower pressure it is placed in a supp y line aforesaid, the port C being connected to the high pressure. The chamber A would in this case be charged with air or other expansive fluid to a pressure corresponding to that of the reduced pressure required. The reduced pressure is then exerted on the top side of the diaphragm D while the corresponding air pressure acts on the other.

When the reduced pressure -falls below that of the air pressure in the chamber A the diaphragm D is then forced upwardly by the expansion of air or other expansive iuid stored in the chamber A. The movement of the diaphragm D is transmitted through the lever Fand valve rod C3 to the valve C5 thus allowing more steam to pass to the low pressure side, which continues until the low pressure exceeds that of the air in the chamber A when the diaphragm is forced downward and the spring J instantly forces the valve C5 to its seat and the supply of steam is shutoff, thereby maintaining a constant pressure on the low pressure side of the valve.

The amount of steam which it is desired to pass through the valve C5 when it is in its closed position can be controlled by the adjustmen@ of the hand wheel K2, and thus prevent any perceptible fluctuation in the pressure on the lower pressure side.

lt will thus be seen Vthat myinvention is not only valuable as an automatic regulating valve for fan engines, but also as a pressure reducing valve, which is an important desideratum.

It will be seen from this description that by the use of an air reservoir as described, l am enabled to dispense with the use of levers, springs and other analogous devices to counteract the steam pressure which has to be regulated. ln fact the diaphragm shown in thedrawings floats between the pressure of air on the one side and pressure of steam on the opposite side thereof, so that `the slightest inequality of pressure on either side causes the diaphragm to move and thereby a most sensitive regulator is provided.

What l claim as my invention is i 1. In automatic regulating devicesfor fan engines andthe like, the combination with the main air reservoir illed with air at a predetermined pressure and hermetically sealed and rovided with a top having an orifice therein and a flat outer surface, of a diahragm lying normally parallel with the surface, a sup lemental top having an inner surface para lel to the plane of the outer surface of the top, packing rings holding said diaphragm normally midway and parallel to the outer surface of the top and mner surface of the supplemental top, the supplemental to being provided with a central orifice an an outer chamber located and communicatin with the steam line, a valve in the steam ine and means between the valve and the dia hragm operated from the diaphragm for adJusting the position of the valve as and for the purpose specified.

2. In automatic regulating devices for fan engines and the like, the combination with the main air reservoir filled with air at a predetermined pressure and hermetically sealed and provided with a top having an orifice therein and a flat outer surface provided with annular corrugations forming grooves communicating with each other, of a diaphragm lying normally parallel with the surface of the top, a supplemental top having an inner surface paral e to the plane of the outer surface of the top and provided with annular grooves A communicating with each other, packing rings holding said dia hragm normally midway and parallel in t e outer surface ofthe top and mner surface of the supplemental to the supplemental top being provided wit a central orifice and an outer lchamber located and communicating with means between the valve and the diaphragm operated from the diaphragm for a justing t e .position of the valve as specified. engines and the like, the combination with the main air reservoir filled with air at a prei determined pressure. and hermetically sealed and provided with a top having an orice therein and a flat outer surface, of a diaphragm lying normally parallel with the surace, a supplemental top having an inner surface para lel to the plane of' the outer .surface of the top, diaphragm normally midway and parallel between the outer surfaceV of the-top and inner surface-oil the supplemental top, the supplemental top being provided with a central orifice and an outer chamber located and the steam line, a valve in the steam line and 3. x In automatic regulating devices for fan communicating with the steam line, a valve iio packing rings holding said in the steam line, a pin held in the central orifice in the supplemental top and provided with a reduced upper end forming a pressure point, a lever `fulcrumed in the chamber and with which. the pressure point contacts in proximity to the fulcrum, the opposite end of said lever operating the valve as and for the purpose specified.

4. In a device of the class described, the combination with the valve casing having the U-sha, ed Wall in the center thereof provided Witlli) top and bottom orifices and ports oppositely located in the steam line, of the double valve provided With a screw top, a

nut fitting on the screw top, a rod having a 15 THOMAS MONTGOMERY.

Witnesses: G. F. RooNEY,v R. V. LESUEUR.

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