US1747598A - Oil valve - Google Patents

Description

L.. A. POPP Feb. 1s, 1930.`

OIL VALVE Filed 001'.. 17, 1928 Pee-ned Feb. 51s, 1930*l vUNITED ASTATI-:s PATENT OFFICE LEONABD'A. POPP, 0F ISAUQ'US, MASSACHUSETTS, 4 SSIGNOR TO LYNNVIPRODUCTS CO., OF LYNN, MASSACHUSETTS, A CORPORATION F MASSACHUSETTS OIL VALVE tions, and are widely employed in controlling the rate of feed of liquid'fuels such as hydrocarbonsl The presence of small amounts of water carried along with such liquid fuels and condensing about the valve seat has 'given rise to faulty operation. This water shows a tendency to collect into one large drop at the valve seat. Owing to this drops strong coherence and the relatively small annular passage opened around the needlepoint when fuel is being supplied7 this drop will, whenever resent, interfere with the uniformity of ow through the valve and even check this flow entirely.

The object of the present invention is to provide a needle-valve having the advantage over prior types in being free from likelihood of becoming clogged by water in the manner described. c,

To the accomplishment of this object, and such others as may hereinafter appear, the invention comprises the features and combination of parts hereinafter described and then particularly pointed out in the appended claims.

The preferred form of the invention is shown in the accompanying drawings, in which:

Figure 1 is a view, in elevation, of the improved valve, showing also a short section of an inlet conduit and a cross-section of an outlet conduit; f

Fig. 2 is a view, in vertical section n line 2-2 of Fig. 1, showing the valve close v L Fig. 3 is a view like Fig. 2 showing the needle raised olf of its seat to partially open the inlet port, but with the outlet port still closed;

F ig. 4 is a view like Fig. 2 showing the relation of the parts when both the inlet and outlet ports have been opened to the fullest extent; and

Fig.' 5 is a plan view of the improved valve provided with a scale. y

In the embodiment of the invention illus/y trated in the accompanying drawing a Casin/g the outlet port 5, and is mounted for move- 10 1 is made in any suitable form to provide a valve chamber 2 having a partition at its lower end in which is an inlet port 3 for admltting liquid fuel tothe chamber that is suppliedthrough a conduit 4 connected with the casing l at said lower end. The port -3 1s of much greater diameter than is required for the normal rate of How of fluid, such as hydro-carbon, to maintain the burner, or other device supplied, 'in operation. Herein, the valve-chamber 2 is conveniently, but not necessarlly, made cylindrical and is provided with a small outlet port 5 disposed in its lateral wall above the level of the inlet port- 3.

The port 5 communicates with' a conduit,

leading to the point of delivery at which the fuel passed through the valve is to be consumed.

A needle 7, having a conical or otherwise.

pointed operating end 8, is disposed lengthwiseof the chamber 2 in axial alignment with the inlet' port 3, against the inner rim of which said conical end 8 Vmay seat, the needle 7 having a stem of greater diameter than that of the port 3. This seating affords a tight andeffectual seal against flow of fuel through the valve.A

The needle 7 is shown as longitudinally movable within the chamber 1 to afford an easily controlled means of moving its conical end 8 toward and from the inlet port 3. The needle is movable 4longitudinally through a plug l0 at the upper end of the casing being conveniently in screw threaded engagement with the plug which is threaded into the easing 1. The upper end of the needle stem passes loosely through the upper end of the plug l0 and leakage is prevented by packing 12 compressed by a gland nut 11 threaded exteriorly on said plug. Movement ofthe valve is operated by a handle 9 secured to the projecting stem of the needle 7.

In accordance with this invention, the needle 7 is provided with a portion 13 intermediate i'ts length which closes the lateral outlet port 5 both when the pointed extremity of the needle is seated or nearly seated -in the inlet port 3. This portion 13 is given /a sliding fit within the chamber 2 adjacent held between ashoulder 14 formed' by the lower end ofthe threaded portion of 'the needle and a collar that is fixed upon the needle 7. ,The needle is thus free to revolve within the sleeve 13 as it ismoved-np or down within the chamber'in operating the valve. The sleeve preferably has a tight sliding it lwithin the casing to eifectually seal the outlet port.

An important feature of the mventlon 1s lthe spaced relation established between the i conical end.8 of the needle and the lower edge rof the sleeve 13. This relation isV suc-h that when the inlet port 5 is closed by the needle 7 the sleeve 13 Will extend down a suicient distance below the outlet port 5, as' shown in Fig. 2, to permit a considerable .upward movement of said needle and consequent substantial opening of the relatively large inlet port, before the sleeve 13 will have uncovered any part of the out-let port 5. y The result of this relation is shown in Fig. 3 wherein the inlet port is widely opened while the outlet `port has not yet been uncovered so that, while fuel has been admitted to the chamber 2, its How through the valve has not yet begun.l It is during this relationship that any Water collected around the needle-seat is given an opportunity to gravitate through the ample area oered by thefopened inlet 3 and settle down through the stationary Huid 'in he conduit 4 to a point where it cannot cause' trouble.l Thereafter, continued rotation of the needle 7 to lift it farther off its seat moves the loweraedge of the sleeve 13 to and across the outlet port 5, leaving it wholly or partly uncovered, as may be required to obtain the desired rate of How. Thus, it is by the position of the sleeve 13 on the needle 7 that the rate'of flow is controlled. l -The needle cooperates with its seat to give a positive shut- 0H. When the valve is set to permit iiow the needle is so far off itsseat and the inlet port so widely opened that even considerable water standing about the said seat is ineffective to prevent adequate flow, because the opened area ofthe inlet port 3 is purposely materially greater than the total area of the outlet port 5. Thus, ample margin is provided to-care for partial blocking. y

If desired,a stationary scale 16 may be applied to the valve-body, or to the gland nut 11, about which the illustrated Ihandle 9 can ,swing as a pointer, to enable a setting of the4 valve found proper for a desired purpose to 'be quickly and surely i'e-established after.

shutting 0E the valve. A refinement in this connection is to choose a pitch for the threads on, the valve 'stem such that one complete revolution'of the handle 9 from shut-off position `will serve to lift the needle to a height v where the sleeve 13 will just begin to uncover the outletgport 5 and start the flow. vOrdinarily another quarter turn of the valve stem will provide sucientulow of `fuel through thev valve.

, The nature and scope of the invention vhav- Y in'g been indicated and the most eiicient form at present'known having been speciically de- 1 scribed, yet recognizing that some'modifications and changes may be'I made without'departing fromv its scope and spirit, whatis claimed as new, is j 1. A valve comprising an integral-,casing havinga cylindrical chamber, closed at one SCI end except for an inlet port andhaving an W v outlet port in its lateral Wall, a plug closing the other end of the casing, a needle entering the casing through said plug having a threaded engagement vwith the plug, the threads -on the `needle terminating in a.

shoulder and said needle having a uniform smaller diameter below said shoulder and terminatmg 1n a conical end to seatin-sid inlet porta sleeve on the needle having a sliding fit with the wall of said chamber but permitting rotation of the needle within it, said sleeve being held againstV axial movement onthe needle-by said shoulder and a collar fitted on the needle belowl said sleeve, and means for rotating the needle within said plug to seat` and unseat its conical ed in said inlet port and cause said sleeve to traverse the casing past said outlet port and Acontinually maintain aXial-alinement of the needle within the casing.

2.. A valve comprising a casinghaving a cylindrical chamber and an inlet port at one end and an outletl port in alateral wall, a

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