US2016234A - Pilot regulator attachment - Google Patents

Description

@et T, 1935. R. c. HUGHES PILOT REGULATOR ATTACHMENT Filed Feb. 19, 1932 INVENTOR Ralph @Hagiz es BY MAQ@ ATTORNEY Patented Oct. l, 1935I UNITED STATES PATENT OFFICE Ralph C. Hughes, Anderson, Ind., assignor to Reynolds Gas Regulator Co., Anderson, Ind., a

corporation of Indiana Application February 19,

3 Claims.

My invention relates to pilot regulator attachments constructed for detachable mounting beneath a main casting of pressure regulator structures and particularly for pressure regulators for A maintaining a uniform pressure in gas service pipes desired to supply fuel gas to furnaces having suitable pilot light control, irrespective of the fluctuation of pressure in the supply mains for such furnaces, or for other gase burners which are suitably installed in other casings rather than a furnace. Such pressure regulators will preferably include a valve member in the intermediate main casting normally urged downward to open position, and will have a diaphragm casing mounted upon and above said casting and connecting means for operating the valve.

It is an object of my invention to provide in the upper casing a plate attached to the lower surface of the diaphragm, the plate having a reduced lower end movable through an aperture in the lower section of said diaphragm casing and axially connected with a valve stem for actuating the valve in the main casing.

It is a further object of my invention to provide beneath said main casting a pilot control attachment device having means for detachable connection with the main casting at a bottom opening in the latter, including as a unitary part of the same, a diaphragm casing having upper and lower chambers with an intermediate diaphragm having its peripheral edge clamped between i'langes of the casing sections, such upper chamber responsive to pressurein the outlet chamber of the main casting, and also having a 'iitting for detachable connection with a pipe leading to a pilot light for supplying the main gas burner, as will be understood.

A further object of my invention is to provide said diaphragm casing for the pipe fitting as one whose upper section is externally threaded and Vcylindrical in form for attachment to a threaded orifice in the lower wall of the main casting, and on the outlet side of the main valve, so that connection of said pipe fitting with a pipe leading to a pilot light of a furnace or other gases to be heated supplied with gas fuel from said casting, will be controlled by the iiuid pressure in the outlet side oi said main casting.

It is a further object of my invention to provide such a detachable lower diaphragm casing with a threaded thimble integral with the upper section of said lower casing to take the place of the usual plug ordinarily seated in a lower opening in the lower casting section, such upper casing section having pipe connection with a 1932, seal N0.'593,999

pilot light of a furnace or other heater ordinarily supplied with gas fuel from the main valve casting.

Other objects and advantages of my invention will hereinafter appear in the following description and the novel details particularly pointed out in the appended claims.

In the accompanying drawing, the figure illustrates a vertical sectional View of a gas regulator with the upper and lower diaphragm attachl0 ments connected with the maincasing and embodying my invention, the section being taken in the plane of the axes of the inlet and outlet connections. l

Referring now to the drawing, the valve mechl5 anism requires a valve casting 5 having an inlet chamber 6, an outlet chamber 1, and a pressure chamber 8 in the upper casing I3. In the partition wall 9 is a valve regulated opening I0 in which I provide a valve I I, the latter being 20 mounted on a vertical stem I2 extending upwardly into the upper diaphragm casing I3. Upon the casting 5 the casing I3 rests, there being a diaphragm I4 clamped at its peripheral edges between the casting 5 and the casing I3 as shown at I 5. The valve member I I is frusto-conical and will close against the valve seat 31 on the thimble 38 provided in the vertical opening Il).

A reduced upper end of stem I2 is externally threaded at I6 to receive adjustably thereon the clamping block I1 having an internally threaded central aperture for engaging the reduced end of the stem. A washer I8 rests on the shoulder I9 of the stem I2 to clamp the diaphragm against the block I1 which has its upper surface expanded as a plate 2U applied beneath the casing diaphragm 2| centrally apertured.

A threaded opening 22 is provided in the bottom of the casting 5 which has ordinarily been of service for insertion of certain tools for repairs and adjustment, and usually closed by a plug. In my improved attachment for controlling a pilot light, diaphragm casing 23 is detach ably suspended from the main casting by prog viding the upper section of such casing with an 45 upwardly-projecting threaded sleeve 24 which is securely inserted in said opening 22, there being a port aperture 25 in the section wall, axial `of said sleeves, which serves the purpose of providing a valve seat 26 against lwhich a valve member 50 21 may be urged for closing position, and thereby cut oif communication between the outlet chamber 1 and the diaphragm chamber 28 of the case The diaphragm 2| of the upper casing is 55 clamped between the plate and the upper n metallic plate 29 by a screw 3U, inserted through the diaphragm,v and into the upper end of the threaded socket 66 in the block I1, The main valve ll is normally urged downwardly to open position by gravity and such tendency is supplemented by coil spring 3| interposed between the head of the screw A3Q above `the plate 29, and the extension 32 of an adjusting screw applied to the upper end of the coil. The upper section 39 of the upper casing |3 is provided with anhin-- tegral upwardly extending sleeve 33 internally threaded to receive adjustablytherein the screw 34, The section 39 is also provided with a vent 35 and a protecting cover'3l5 having ear lock provision with the case.

The upper section of the detachable casing for the pilot light is designated by the numeral 4D and is provided with an upwardly extending threaded sleeve 4| for detachable insertion in the opening 22 of the casting, and is lfurther provided with a threaded opening 42 for receiving thereinlan externally threaded tting 43 for detachable connection with a pipe v44 `leading to a pilot light for the main burner for which the outlet connection 45 of the main casting V5 supplies the gaseous fuel.

The lower section46 of the attachment case 23 has peripheral flange connection with the section lill, clamping between them the peripheral edge of the diaphragm ilY which is centrally apertured to receive therethrough the reduced threaded end '48 of the lower end of the valve stern 45 upon which the valve member 21 is mounted. A washer 5@ is mounted on said reduced end and is positioned against the shoulder 5|, the diaphragm 41 being clamped between the washer 50 and the lower plate 52 also apertured'to receive the screw threaded end of the stem, anda lock nut 53 clamps the parts together.

The lower section 45 of the attachment casing 23 is provided with a socketed and integral downwardly projecting portion 54 which has a central aperture threaded to receive an adjusting screw 55 with a lock nut 56. A coil -spring 51 has its lower end Vseated in the socket 58 and properly positioned upon the endsof the screws 48 and 55, and will normally Vbe adjusted to support the Y'valve 2l in open position. A further normal-support of the diaphragm 41by pressure exerted on its lower surface is also present in the lower chamber of such casing, as will be evident. The sections oi casing 23V will be detachably clamped together by bolts 59. It is to be noted' that the valve member 21 is positioned oppositely relative to its seat, to valve member Il, but 'that since the two springs 3| and 51 are oppositely directed, their tendency will be to normally open both valves, so that fluid entering the chamber 6 will normally pass through the port I0 into the outlet chamber l and thence through the outlet 45 and through thegpipe 44 to the pilot light.

A small aperture 53 is also provided in the partition wall 9 to permit suflicient gas Vto pass through into the outlet chamber for operation ,casing E3, which'pressure reaches this chamber through the reduced channel Bil of the vertical aperture 6| leading upward from the main out- 23 is used, pass downwardly through the port 25 10 j :into the upper chamber 28 of the attachment, a Ysmall aperture 62 leading from 28 to the opening 42 and reach the pipe 44, since the valve member 2lV is normally in-its raised position.

- Whenever the pressure on the delivery side of 15 the main valve builds up for any reason, a. back pressure willrbe created which, passing through the opening BU and 6| into the chamber 8, Will tend to lraise the diaphragm 2| and move the main valve Y toward closed position, thereby 20 `shutting off iiow of gas through Vthe valve until `the pressure vvon the delivery side drops, which will permit r'elierfof pressure from the diaphragm chamber thereby again permitting the valve to move to open position by its normal bias. Q5 Such variation in pressure in the outletchamber 1 will also control the valve 21 by varying pressure in the chamber 28 attachment V23, which pressure will also and correspondingly vary with the yielding pressure in the lower chamber of 3|) such attachment.

It is the purpose of' my improved mechanism to normally open both valves by the pressure 'of the coils in the main casting and the attached casing, and so supply the main burner, if such 35 receives the gasfr'omthe outlet chamber; and to automatically tend to close the valve 'when the demand decreases. The pilot light will however, be supplied from the chamber 28 Whether the main demand is lessened or increased, since the f4() valve 21 willno'tbe positively closed against the force of the 'spring 51 since excessive pressure in chambers 1 and 28 automatically operates valve 2 correspondingly, but permits entrance of Agas Vfor the pilot when- Vthe main burner is shut off; and will automatically control pressure Vin the line 44, even when the valverl is held abnormally low in vits orice, as by the presence of some particles of matter vin the port preventing proper closing action of the valve. f5() It is a special advantage of my attachment 23 that it is so Vreadily removable by merely unscrewing the sleeve 4| from the opening 22, after the connection 43 has been detached. The opening 22 may be closed with the ordinary threaded '55 plug when the main regulator casing is to be used, for any purpose, without the control attachment for a pilot. It is also evident that other forms of main valve pressureV regulators having a threaded opening in their bottom wall, may befgg tted with my attachment, when a pilot light is to be supplied. The attachment `23 may be connected by the threaded sleeve 4| in a correspond-Y ing opening 22 of regulators `for operating the main valve under varying conditions of pressure F65 supply and demand, by adjustment of the plug 55.

Having fully described my invention, what I now claim as new and desire to secure by Letters Patent is:V

l. A combined line pressure and pilot pressure 70 regulator valve comprising a casing having a main inlet chamber, a main outlet chamber, a main diaphragm chamber and a pilot diaphragm chamber, a wall Abetween the main inlet chamber andthe main outlet chamber, said wall hav-13 ing an opening therein, a diaphragm in the main diaphragm chamber, a valve carried by said diaphragm to close the opening in the wall between said outlet and inlet chambers, resilient means acting to maintain said valve in an open position, a passageway between the outlet chamber and said diaphragm chamber whereby a predetermined pressure in the outlet chamber will close said valve, a second diaphragm in the pilot diaphragm chamber, a passageway between said pilot diaphragm chamber and said outlet chamber, a pilot valve carried by said second named diaphragm and arranged to close said passageway, resilient means acting to maintain said last named valve open until a predetermined pressure exists in said pilot valve diaphragm chamber, and an independent low pressure opening communicating with said pilot diaphragm chamber.

2. The combination with a pressure regulator comprising a valve casing having a high pressure inlet, a low pressure outlet and means disposed therebetween and responsive to variations in the pressure at the low pressure outlet to control the pressure at the low pressure outlet, of a second low Apressure outlet a passageway in said casing in communication with both of said low pressure outlets, a valve arranged to close or open said passageway, resilient means acting to normally maintain said valve open and means responsive to the variations of pressure'at the second named low pressure outlet to control the position of the second named valve, whereby two independent low pressure lines having diierent pressures may be simultaneously maintained.

3. A pressure regulator including a Valve casing having opposite high pressure inlet and low pressure outlet openings and an internally threaded bottom opening, a valve member disposed therebetween and means responsive to the pressure of the outlet opening to operate said Valve to control the ow between the inlet and outlet openings4 and thereby maintain a predetermined low pressure at the outlet opening, a pilot regulator having an integral upwardly threaded sleeve for detachable connection with the threaded opening in said bottom wall, said Y pilot regulator having a chamber therein, a pas- RALPH C. HUGHES.

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