US2414544A - Burner nozzle and control means - Google Patents

Description

Patented Jan. 21, 1947 BURNER NOZZLE AND CONTROL MEANS Charles V. Moore, Austin, Tex.

Application July 3, 1945, Serial No. 603,010

3 Claims.

It is an object of this invention to provide a novel burner nozzle including therein an automatic control means to control the amount of fuel passing through the exit of the nozzle. The control means is automatically operated by the pressure of the fuel within the nozzle barrel.

It is an object oi this invention to provide a novel burner nozzle that may be readily substituted for conventional burner nozzles now in use to thereby provide an automatic control means completely7 housed Within the nozzle construction.

It is also an object of this invention to provide a very simple, sturdy and reliable device that can be produced in quantity at a low cost.

Other objects of my invention will be revealed as a complete description of the embodiment disclosed herein and in the accompanying drawing is presented.

In the drawing:

Figure l is a longitudinal sectional view through the central portion thereof disclosing my new nozzle having the automatic control means within the nozzle,

Figure 2 is a transverse sectional view taken on the line 2-2 of Figure 1, looking in the direction indicated by the arrows.

Figure 3 is. an elevational view of the disc as seen from the inside.

The reference characters used n the drawing and in the specication identify the essential structural parts; features and portions of the completed device.

In the single embodiment described herein and shown on the drawing, it is noted that a tubular member or barrel I defines a fuel chamber 2. The tubular member I is provided with a reduced portion 3 thereby providing a shoulder 4. The reduced portion 3 is provided externally with .screw-threads 5, While internally it is beveled outwardly deiining a bevel 6.

A nozzle body 1 is threadedly mounted on the threaded portion 3 and rits accurately against the shoulder 4. The body 1 is provided with a centrally located opening 8 delning a housing for a sliding element or valve 9 and also defining a bearing for the connected end portion of the valve stem Il! of said valve 9. The valve 9 is provided with a frusto-conical outer portion complemental to the contour of the apertured portion The body 1 is provided with exit apertures or bores I I extending therethrough and into an annular channel Il. Both the body 1 and the disc I4 are provided with straight grooved portions dening outlet passages I2, I2', I2a, I2b arranged substantially tangentially to the tapered outlet portion of the orice I5. These grooves I 2, I2', etc., maintain communication between the annular channel I I' and the orice I5.

The body 1 is provided with a anged screwthreaded ring I3 securing the apertured disc or jet sprayer I4 in place on said body 1. The aperture I5 has a tapered wall and an outlet orifice for the fuel jet to be ignited and burned in the furnace. The opening 8 is in alignment with the orice I5, whereby the valve 9, having a tapered or frusto-conical portion, may cooperate with the tapered Wall of the aperture I5.

The body 1 is also provided with supporting members IB, I1, I8 extending into the barrel I and connected to a control unit I9 and supporting said unit substantially centrally within the barrel. The control unit I9 is completely immersed 'in the furnace fuel Within the barrel I..

The control unit I9 comprises a hollow cylinder 20 having a flexible corrugated diaphragm 2I secured on the cylinder by a flanged screw-threaded ring 22 The arms IB, I1, I8 are connected to the ring 22 by any suitable means, the opposite end of the cylinder being provided with an adjustable screw-threaded cap 23. The cap 23 is provided with a tubular stud 24 centrally located within said cap and cylinder 2U, said stud constituting a centering device for a helical compression spring 25. The stem I Il is provided with a spring abutment 26 against which the spring 25 presses and abuts. The stem I0 is provided with threaded nuts 21 and 28 threaded on said stem in position to grip the central portion of the diaphragm 2l. The spring abutment 2B is secured on the stem I0 in suitably spaced relation to the nut 28.

`lin the control unit I9 the compression spring 25 rests or presses on the inside of the adjustable cap 23. When it is desired to adjust the spring pressure to produce the desired results, it is neces- Y sary to remove the body 1 from the barrel I by unscrewing the body 1 on the threaded portion 3, and since the body 1 having the supporting arms I6, I1, I8 is connected to the unit I9, the unit can readily be withdrawn from the barrel I for adjustment of the spring pressure. When the desired adjustment has been made, the body 1 and increases, that pressure tends to reduce the volurne of the unit I9 and as a consequence, the flexible diaphragm 2| is flexed inwardly'into the unit I3 and in response to this movement the stem It and valve 9 are drawn along with the movement of the diaphragm to increase, the amount of valve opening and thereby provides for a more free flow of the fuel.

Thisfree flow lretards the speed and force of flow and prevents the carrying of the flame an undue distance beyond the exitv orifice I5 of the burner nozzle.

When the pressure is reduced in the chamber 2 by the free iiow or otherwise, the diaphragm 2|, the valve 9 and its stem Il! are propelled to normal position by the spring 25, whereby the exit passageway is reduced in size, thereby reducing the quantity of fuel flow and simultaneously increasing the speed of flow a sucient amount to maintain the flame in proper position relative to both the furnace and the exit end of the nozzle. The capacity of the exit or sprayer jet orifice is controlled directly and proportionally to the pressure 0f the fuel within the barrel I.

It is the function of the control unit I9 to maintain the flame in a substantially constant position within the furnace and in proper position relative to the exit portion of the nozzle.

The barrel I may be provided with means such as screw-threads, apertured flange, etc. (not shown), whereby the burner nozzle may be installed in new structures or substituted for other nozzles not having my novel control means or unit. v

Having fully described my invention and the operation thereof, what I claim is:

l. In a burner nozzle. the substructure comprising a body in combination with an automatic control unit, said body having'spaced arms extending therefrom in the same general direction and connected to the control unit, said body having exit bores for the fuel flow therethrough, said control means having a flexible diaphragm, said diaphragm being actuated in one direction by a compression spring and in the opposite direction by fuel pressure, in combination with a valve and its stem, said stem being connected to said diaphragm and adapted to be actuated thereby responsive to fuel pressure, said stem and valve be- 4 ing slidably associated with said body and said body defining a guide for said stem and valve, said body having grooves extending respectively from said bores to said valve. i

2. In a burner nozzle, the substructure comprising an automatic control unit, said unit having a cylinder, cap members, a flexible diaphragm, a valve and its stem, a spring and arms to support said unit, said stem being connected to said diaphragm and said diaphragm being connected to said cylinder by one of said cap members, said stem having a shoulder located in said cylinder,

' the other cap member having adjustable screwthreaded' connection with the other end of the cylinder, said last-named cap member having a 'hollow projection extending into the cylinder and. defining both a centering means for a helical compression spring, said spring rests at one end upon the inside of theadjustable cap member while its opposite end rests against the shoulder of the valve stem.

3. Aburnernozzle comprising a barrel, a body, a sprayerjet means, an automatic control unit, said body geing detachably connected to said barrel in substantially axial alignment therewith, said body receiving a valve and its stem and forming a guide means for said valve and its stem, said body having supporting arms for said unit, said arms being connected to said body and to said unit whereby said unit is supported substantially centrally of said barrel, said sprayer jet means being detachably connected to said body in axial alignment therewith, said sprayer jet means having an exit orifice centrally located therein, said body'having exit bores for the fuel and also having grooves defining channels providing communication between said bores and said orifice, said unit comprising a cylinder having a helical compression spring thereinand screw-threaded cap members on its ends, a flexible diaphragm secured on one end of the cylinder by one of said screw cap members, said diaphragm being connected to said valve stem, said other cap member being adjustable and defining a rest for one endV of said helical compression spring, said adjustable cap member having a hollow 'portion extending into the cylinder and forming a centering means for said spring, said stem having a shoulder in the cylinder, said shoulder comprising a stop engaging one end of the compression spring ina position remote from said adjustable cap member, said valve and stem being urged toward closing position by said spring, said valve and stem being urged in the yopposite direction against the tension of said spring by the pressure of the fuel in said barrel thereby automatically controlling the flow of fuel through said exit orice.

CHARLES V. MOORE.

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