US2001611A

US2001611A - Burner for liquid fuel

Info

Publication number: US2001611A
Application number: US654515A
Authority: US
Inventors: Ipold Victor
Original assignee: Technik & Invest A G
Current assignee: Technik & Invest A G; Technik & Investment A-G
Priority date: 1930-05-12
Filing date: 1933-01-31
Publication date: 1935-05-14
Anticipated expiration: 1952-05-14

Description

May 14, 1935. v IPQLD BURNER FOR LIQUID FUEL 2 Sheets-Sheet 1 Filed Jan. 31', 1933 May 14, 1935. v. lPOLD 2,001,611

BURNER FOR LIQUID FUEL Filed Jan. 51, 1933 2 Sheets-Sheet 2 Jiamzzhr:

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Patented May 14, 1935 BURNER FOR LIQUID FUEL Victor Ipold, Vienna, Austria, assignor to Technik & Investment A.-G., Vaduz, Liechtenstein Application January 31, 1933, Serial No. 654,515

In Austria May 12, 1930 Claims. (01. 158-69) The invention relates to a vaporizing burner for heating appliances utilizing petroleum or the like. The burner comprises a vaporizer, a fuel valve for regulating the admission of fuel to the 5 vaporizer, and a gas nozzle which is connected .to the vaporizer and ejects the vaporized fuel or gas with which it is supplied from the vaporizer. A mixing tube may be provided for the reception of the gas from the gas nozzle.

The gas nozzle is equipped with a valve which may be the usual needle, for regulating its free sectional area, and mechanism is provided for operating the needle.

The fuel valve is operated by the usual means, such as a knurled hand wheel on its spindle.

It has been found that the sequence in which the needle and the fuel valve are operated, is important. Gas residues form on the needle in the shape of coke which is very hard when cold and, if the needle is operated before the vaporizer has been heated, its movement may be obstructed to such an extent by the hard coke that the needle is bent or otherwise damaged, and the gas nozzle does not function properly. Therefore, the needle must only be operated after the gas nozzle has become hot and the coke, if any, on the needle has been softened. The heating of the gas nozzle is accelerated by placing the upper end of the gas nozzle substantially at the level of the vaporizer.

The needle-operating mechanism is driven by the. means for operating the fuel valve but the connection for driving the mechanism from the means is so designed that the mechanism is en-- gaged only after the means has performed a part of its movement for opening the fuel valve.

By these means, the fuel valve is opened first and the fuel is evaporated in the evaporator and heats the nozzle until its needle can be operated safely, and only after this condition has been established, the mechanism is engaged and the .needle operated.

Preferably, means are provided for preventing inadvertent operation of the mechanism for the needle so that the burner becomes foolproof. Such means may be a member for locking the mechanism against operation while the means for operating the fuel valve performs its partial movement, and for releasing the mechanism after such partial movement has been completed. If such a locking member is not provided it may occur that an unskilled operator handles the mechanism before the fuel valve is opened, and

bends or damages the needle of the gas nozzle.

A suitable means for connecting the means for operating the fuel valve, and the mechanism for operating the needle, is a stop controlof wellknown type. Such a control not only effects the subsequent operations of the means for operating the fuel valve, and themechanism for operating the needle, and the locking and releasing of the mechanism, but it also re-acts on the fuelvalve operating means by limiting the movement of the fuel valve in the direction away from its seat so that the fuel valve is not screwed out too 7 far and its stuffing box damaged.

In the old burners of this type, the fuel valv and the needle of the gas nozzle can be operated ating the fuel valve and subsequently operating the needle.

The burner is of the kind in which a mixing nozzle disposed abovea vertical gas nozzle is located beneath a mixing cap provided with lateral effective heating flame apertures which cap seats on a vaporizer in the form of a hollow annulus conductively connected with the gas nozzle leaving apertures for jet flames for heating the vaporizer.

Hitherto in such burners the mixing nozzle, consisting of a cylindricaltube, as well as the vaporizer annulus were arranged comparatively farabove the gas nozzles and the latter were connected to the annulus by correspondingly long upwardly extending U-tubes so that the desired small constructional height of the burner was not obtained norwas there a small path for the gas nor any adequate heating of the gas nozzle so that the latter became foul too rapidly in consequence of gas residues.

According tothe invention these disadvantages are wholly avoided in that the vaporizer ring is attached as a marginal rim to a short. mixing nozzle which is broadened at the bottom in a cup-like manner and in that the vaporizer annulus is connected with the gas nozzle, which for instance may be arranged in the plane of the annulus, by spoke members one at least of which is hollow.

By the aforesaid operative connection of the means for operating the fuel valve on the one hand, and the nozzle valve on the other hand, the operation of the burner is simplified and facilitated so that it may be operated without risk by any unskilled person.

In the accompanying drawings,'a burner emside wall of the burner frame at the right, and

r the handle for turning the spindle of the fuel valve, removed. I n

Referring now to the drawings, I4 are four feet on which the frame I of the burner ismounted.

2 is a hot plate, with a hole l5, which may be detachably placed on, or hinged to, the frame 4.

v3 is staying or bracing plate in the frame which is readily accessible for cleaning and inspection after the hot plate 2 has been removed or turned up on its hinge, not'shown. The plate 3 has a hole 4 with a downwardly directed. rim for the reception of acup ID on the vaporizer 3. V The cup I and the rim of the hole 4 make up an annular slot 29.

Q15 is a fuel tank for petroleum or other suitable liquid, and 6 is the usual manually operated air pump for placing the fuel in the tank under pressure. 1 is a fuel-supply pipe for the burner. The

V pipe 'I is connected to the tank 5 at one end-and at its other end has a valve casing II. The fuel valve I6 is formed on theinner endof a spindle l8 and fits a seat where the pipe I is connected to the casing H. I9 is a thread on the spindle which fits in a female thread of the casing I, 2|)

outer end of the spindle.

is acap nut for packing the spindle in the ca..- ing II, and I1 is a knurled hand wheel on the 8 is the vaporizer already referred to.- It is an annular tube whose bottom is connectedto the valve casing H by a hole 8, so that the supply of fuel to thevaporizer 9 from pipe 1 is controlled by the valve l6. s a

25 is a mixing tube which is mounted within the circular area defined by the annular vaporizer 3. The mixing tube is comparatively short and cylindrical, with its'lo'wer end flared tothe inside diameter of the vaporizer 9. Mounted above the upper end of mixing tube 231s an inverted mixing cap 26, with a radially slotted skirt 21 whose lower end 23 is seated on the vaporizer 9 and recessed as shown so as to define flame passages with the upper face of the vaporizer 9. The mixing cap may be pressed'from anysuitable material, such as talcum magnesite.

Mounted below the mixing tube 25 and co-axially with respect to the burner, is a vertical tube 22. Inserted in the upper end of the tube is the gas nozzle 2|, with a bore, Fig. 4. The tube 22 is connected to the vaporizer 9 by a tubular stay 12 and a solid stay I 3. The tubular andthe solid stay also serve as heat conductors to the nozzle 2|.

33 is a needle valve which projects into the bore 31 of the gas nozzle 2|, 34 isa slidewhich is mounted to reciprocate in the nozzle tube 22, with the needle valve 33 at the upper end of the slide, 36 is a pin on a crank disk 35 which pin engages in a slot of the

slide

34, and 23 is a spindle in a packed bearing 24 of the tube 22. The disk 35 1s secured on the inner end of the spindle. Raising and lowering of the valve 33 is ef fected by turning the spindle'23 and the free sec- The control mechanism permits rotation of the with the

control mechanism

38, 42 is a recess in the block 4|, and 43, 44 are slots in the stop 38 which are adapted tobe entered by the pin 40. Fig. 6 shows the parts of the control mechanism in the position in which the spindle 23 of the gas nozzle 2| is locked against operation, as the member which is between the slots 43 and 44, is 7 held against rotation by the solid or non-recessed cylindrical portion of block 4|. When the spindle |8 is turned anti-clockwise by the knurled hand wheel H, the pin 40 on the disk 33, and

ment and opened as wide as required for heating the vaporizer 9' and, through it, the gas nozzle 2|. On the other hand, the spindle 23 cannot be operated independently of the spindle l8 as it is locked by the control 38. The coke or the like on the needle 33 is softened by the heat before the needle can be moved, and the positive a locking of the spindle 23 renders the apparatus entirely foolproof The operator has to turn only the knurled hand wheel I! for operating the fuel valve as well as the gas nozzle, and therefore the 1 operation of the burner is as simple as that of the .burners referred to above in which the fuel valve stance, asbestos.

As mentioned, the cup lfl'on the vaporizer 3,

which, by the way, is preferably made of brass sheet-metal, like the mixing tube 25, defines a circular slot 23 with the flanged hole 4 in the plate 3. The flame from the starting cup and air for combustion have free access through the slot 29. l

In operation, the fuel in the starting cupf3j0 is ignited and, after the burner has been heated thereby, the fuel valve I6 is opened by turning the hand wheel 11 on the spindle I8 anti-clockwise. Fuel is now admitted to the vaporizer 3 through the hole 8, Fig. 3, and ignited after having been vaporized. The flame now has its full intensity. If it is desired tohave a less intense action of the flame, the hand wheel I1. is turned further.

anti-clockwise until the pin .on the disk 39 engages in theslot 43 of the control mechanism 38 and rotates the stop, causing the spindle 23, through the medium of the needle'valve 33, to restrict the free sectional'area of the nozzle 2|.

The conductor which is' spindle only through I degs. and the rotation of the spindle [8 of the fuel valve is restricted correspondingly, so that the spindle cannot be screwed out so far as to damage the packing in the cap nut 20, by its thread IS.

The upper end of the gas nozzle 2| is substantially at the level of vaporizer 9 so that the nozzle is heated rapidly and efliciently after the fuel valve l6 has been opened. The mixing tube 25 is of cup-like shape at the bottom, and the vaporizer 9 is connected to this cup as a marginal rim.

I claim:

1. In a burner for liquid fuel, a vaporizer, a fuel valve for regulating the admission of fuel to the vaporizer, means for operating the fuelregulating valve, a gas nozzle for ejecting the fuel which has been vaporized in the vaporizer, a conduit for conducting fuel vapor from the vaporizer to the nozzle, a valve for regulating the free sectional area of the nozzle, and mechanism operatively connected to said fuel-valve operating means for operating said. nozzle-regulating valve and for limiting the movement of said means when the fuel valve is moved in a direction away from its seat.

2. In a burner for liquid fuel, a vaporizer, a fuel valve for regulating the admission of fuel to the vaporizer, means for operating the fuel-regulating valve, a tube, a conduit for conducting fuel vapor from the vaporizer to the tube, a nozzle in said tube for discharging vapor therefrom, a valve for regulating the free sectional area of the nozzle, eccentric means for operating said nozzle valve, a spindle for operating said eccentric means which is operatively connected to said fuel-valve operating means, and a control mechanism comprising a pin and slot mechanism for actuating said nozzle-regulating valve in dependency of the fuel valve operating means.

3. In a burner for liquid fuel, a vaporizer, a fuel valve for regulating the admission of fuel to the vaporizer, means for operating the fuel regulating valve, a gas nozzle for ejecting the fuel which has been vaporized in the vaporizer, which nozzle is arranged with its upper end substantially at the level of said vaporizer, a conduit for conducting fuel vapor from the vaporizer to the gas nozzle, a valve for regulating the free sectional area of the nozzle, and mechanism opera atively connected to said fuel valve operating means for operating said nozzle regulating valve and for limiting the movement of said means when the fuel valve is moved in a direction awa from its seat.

4. In a burner for liquid fuel, a mixing tube having a cup-like shape at the bottom thereof, an annular vaporizer connected to the mixing tube as a marginal rim, a fuel valve for regulating the admission of fuel to the vaporizer, means for operating the fuel regulating valve, a gas nozzle for ejecting the fuel which has been vaporized in the vaporizer, a conduit for conducting fuel vapor from the vaporizer to the gas nozzle, a valve for regulatingthe free sectional area of the nozzle, and mechanism operatively connected to said fuel valve operating means for operating said nozzle regulating valve and for limiting the movement of said means when the fuel valve is moved in a direction away from its seat.

5. In a burner for liquid fuel, a vaporizer, a fuel valve for regulating the admission of fuel to the vaporizenmeans for operating the fuel regulating valve, a gas nozzle for ejecting the fuel g