US2558359A

US2558359A - Burner system for weed burners

Info

Publication number: US2558359A
Application number: US20326A
Authority: US
Inventors: Clarence O Henneman; Owen L Garretson
Original assignee: Phillips Petroleum Co
Current assignee: Phillips Petroleum Co
Priority date: 1948-04-10
Filing date: 1948-04-10
Publication date: 1951-06-26
Anticipated expiration: 1968-06-26

Description

n 1951 c. o. HENNEMAN ETAL 2,558,359

BURNER SYSTEM FOR WEED BURNERS Filed April 10, 1948 2 Sheets-Sheet 1 Ll'gu id Fuel Tank INVENTORS OWEN L. GARRETSON CLgl RENCE O. HENNEMAN ESWL Q Aff'a s.

June 26, 1951 c. o. HENNEMAN ETAL 2,558,359

BURNER SYSTEM FOR WEED BURNERS FiJed April 10, 1948 2 Sheets-Sheet 2 Ticrz.

INVENTORS OWEN L. GARRETSON CLIgIBENCE O. HENNEQMAN AH '55 s.

Patented June 26, 1951 12,558,359 BURNER SYSTEM FOR WEED BURNERS Clarence 0. Henneman, Bartlesville, Okla and Owen ,Garretson, Roswell, N Mex assignors to Phillips Petroleum Company, a corporation of Delaware Application April 10, 1948, Serial No. 20,326

is Claims. (or. 158-53) This invention relates to improvements in fuel feeding and control systems for multit-burner weed burners.

One of the objects of this invention is to provide in such a system .a master burner for yaporizing the liquefied petroleum gas fuel by means of which the burners are operated so that the fuel is supplied to all of the burners including the master burner as a vapor.

Another object of this invention is to provide a novel form of fuel supply system to a plurality of burners including such master burners whereby the operation of the apparatus is simplified and rendered more dependable.

Another object of this invention is to provide a multi-burner liquefied fuel system having a minimum of fuel feed lines in the system.

A still further object of the invention is to provide a system of this type the major portion of which may be installed on a tractor trailer.

Other and more detailed objects .of the invention will be apparent from the following description of the embodiment thereof illustratedin the attached drawings.

This invention resides substantially in the combination, construction, arrangement and relative location of parts all as will be described hereinafter.

In the accompanying drawings? Figure 1 is a diagrammatic and schematic illustration of asystem embodying the features of this invention; and

Figure 2 is a longitudinal central cross sectional view through the master burner.

An understanding of the operation of the complete system is facilit ted :by an understanding of the construction of the master burner so that the construction in Figure 2 will be described in detail.

The master burner comprises a two part housing consisting of the body portion l and the nozzle portion 2 held tog ther at their flanged ends by means of nuts and bolts 3. The body portion 1 includes an extension :4 having a passage 6 therethrough terminating in a chamber in the spherical end :5. The torch portion 22 of the housing has an annular chamber 9 communieating with the passage 6, The spherical end has a threaded port I to which the pipe 34 is connected and an axial threadedport to which the pipe 33 is connected. This port also is provided with an internally projecting tube 8 which extends through the passage 6 and into the annular chamber 9 and terminates at an open end It. The inner :wall of the annu ar cha er 9 .2 defines the torch passage ll into which the fuel is discharged through the nozzle orifice 15 of a demountable nozzle ll l. This nozzle is mounted on a tubular reentrant element or bushing 13 of the housing part I. This bushing together with the nozzle 14 forms a chamber into which the threaded port l6 opens and to which a pipe 31 is connected. The burner nozzle orifice is at I2 and at [2 is indicated the position of the ignitor, commonly a spark plug.

A complete four-burner system employing the master burner of Figure 2 is illustrated in Figure 1. The master burner is indicated by the reference character M. The burners are mounted on skids of the type commonly used for this purpose and illustrated in the form of standards having the plates 25 shaped to slide along the ground. Adjustably mounted on the standard 24 are a series of brackets 26 provided with clamps to engage the ball shaped extensions of the burners which are similar for all the burners and are similar in this respect to that shown in Figure 2. It will be recognized that there results a ball and socket supportwhich permits proper angular adjustment of the various burners and the clamping in adjusted position. The details of construction of the supporting mechanism form no part of this invention and therefore have not been shown in detail.

Likewise, the burners 2|, 22 and 23 maybe of any suitable construction and have not therefore been further illustrated although it will be recognized that the construction could be like that of Figure 2 with the elimination of the vaporizing adjunct which characterizes the master burner M of Figure 2. .It will also be recognized that the apparatus can be constructed to include more than four burners when more than two rows of planting are to be freed of weeds simultaneously.

The fuel tank for the liquefied petroleumgas .or equivalent fuel is illustrated at 21 This tank is provided with a gas take-off line 28 at the top and a liquid take-oil line Al in the form of a dip tube as commonly used in this art. The lines 28 and M are provided with the

manual valves

29 and 42, respectively, and are interconnected as shown. At the interconnection is a branch to the pressure regulator 30. The outlet port of the pressure regulator is connected by pipe 3| to a two-way valve 32. One of the branch lines 33 controlled by this valve is connected to the master burner as illustrated in Figure 2.

u Line -34 connected to the other branch line 33' controlled by the valve 32 and to one side of a manual valve 35. The other side of this valve is connected to the fuel manifold 36. This manifold is provided with the branch 31 which connects to the master burner as illustrated in Figure 2, and

branches

38, 39, and 40, which connect to the

remaining burners

23, 22 and 2|, respectively. A bypass line 43 having a check valve 44 therein interconnects line 3| with the point of connection between lines 28 and 4| for a purpose to be described later.

Pipes

34 and 31 are interconnected by a bypass 34' having a. needle valve 45 for a function to be described later. A-valve 31 is included in the line3! which may be a manual valve or a back-flow check valve like the valve 44.

In the operation of this system, it is started up 7 by opening valve 29, valve 42 being closed. Fuel gas flows from the vapor space in the tank 21 through line 28', valve 29, pressure regulator 30 where its pressure is reduced to the proper value,

. line 3|, and to valve 32. Valve 32 is positioned to interconnect line 3| with line 34. Upon opening valve 35 this gas is delivered to the manifold 36- ,by means of the

branches

31, 38, 39 and 46, to 1 the masterburner M and thestandard burners .23, 22, and 2|, respectively. If'valve 31 is a Q manual valve it will be open at this time or if it is a check valve it is placed in line 31- to permit gas to flow to'the burner M. Thus. all of the ,burners can be put in operation at the time of starting up; As an added feature; when it is desired to cut off all burners except the master burner, it can be provided with a passage'P in f the body portion interconnecting the passage 6 directly With the nozzle M in which case; with the valve 32 in the position shown and valves 35, 45 and 31' (if a manual valve) closed. vapor can be supplied directly to the masterburner only from the vapor space of the tank 21 through the same circuit. Valve 31 prevents vapor from -reaching the manifold 36 through line 31.

In either event, as soon as the master burner I has warmed up, valve 29 is closed, valve 42 is opened and valve 32 is positioned to interconnect pipe 3| with pipe 33 (as shown) whereupon liquid will be withdrawn to the inlet of the pressure regulator through the dip tube 4| and valve 42. Liquid fuel is then delivered from the regulator to the. master burner through the line 3|, valve 32 and line 33 to tube 8 within the master burner from. which it is discharged into the space 9 at p the open end In of this tube. The liquid in the H chamber 9 is then vaporized and returned through passage 6 to line 34, valve 35 and manifold 36 from which it flows to all of the burners including i'the master burner (valve 31' being open if a manual valve). Thus, for conditions of operation where the ambient temperature is not suffi m ciently high to cause the conversion of enough of .,the liquid in tank 21 to a vapor to operate the Q burners through the connection 28, it is possible I to supply the required amount of vapor by using l the master burner as a vaporizer.

The hand operated valve 35 is a standard quick ope ning valve which does not throttle but is "either fully open or fully closed. Therefore, J- whe nthe burners are shut down, but it is desired not to kill the flame, valve 35 may either have a leak passage therein to supply sufiicient gas to keep the burners lit or a bypass connection may be: provided between the

lines

34 and 36 or 31 1 through valve 45 to supply enough gas to the manifold 36 to keep the burners lit. This valve 45 may be an adjustable needle valve for adjusting to attain such operation.

With this arrangement a quick snap on and off action is provided without extinguishing the burners unless the needle valve 45 is closed. The two-way valve 32 permits the operator to shunt vapor directly from the vapor space of the tank 21 to the manifold 36 at those times when he Wishes to operate on vapor alone which particularly may be the condition when the ambient temperature is high enough.

Should the bypass 45 not be employed and should the valve 35 be closed after the system has been in operation, the liquid in line 33 would continue to vaporize in the master burner and build up excessive pressures in the line 3|. To relieve this condition, the bypass line 43 with its back flow check valve 44 is provided to shunt the gas and liquid back into the tank 27 around the pressure regulator 30 through the bypass line 43 and thereby relieve the pressure in this part of t the system.

It will be recognized that the use of the bypass I P (Figure 2) prevents the snap on and off action of the master burner. It is therefore advantageous to pipe all vaporized fuel from the master burner back to the manifold 36 through line 34 so that snap on and 01f action for all burners ing the vapor from the master burner to the manifold the use of liquid feed lines is limited, reducing the hazard from failure of equipment.

The use of the valve 35 to cutoff the flow'of vapor results in fractional control of the burner flame whereas with liquid feed the burners would continue to operate for some time after shut-off. This flexibility of the vapor system is highly advantageous as it"will permit cut-off of burners when burning the weeds about small plants such as might be met in some part of a row of plants where the plants have not grown to as large a size as in other parts of the row. This system also permits the reduction of gas consumption by cutting off the gas supply at the time the tractor is turning around at the end of the field.

In other words, by operating on vapor, a snap action results which permits instantly cutting the burners down to the point where they just stay lit during periods when they are not being used. It willbe understood that Where a larger number of burners are used and sufiicient vapor is not 'supplied by one master burner morethan one master burner may be employed. 7

From the above description it will be apparent to those skilled in the art that the subject matter of this invention is capable of some variation and we do not therefore desire to be limited to the single embodiment'herein illustrated but rather to the claims granted us.

What is claimed is: v

1. In a system of the type described, the combination comprising a fuel vapor manifold, a plurality of fuel vapor burners connected to said manifold, at least one of said burners havinga liquid fuel vaporizer in heat exchange relation therewith, a source of liquid and vaporized liquid fuel, means for selectively delivering liquid 01 vapor fuel from said source to said burner, means for delivering vapor fuel from said vaporizing means to said manifold, said last means including an on and off valve for controlling the supply of vapor fuel to the manifold and means for supplying a limited quantity of fuel to said manifold when said on and off valve is closed.

2. In the combination of claim 1, said first mentioned means comprising a valve and pipe connections whereby vapor may be delivered from said fuel source to said burners for one position of that valve.

3. In the combination of claim 1, said first mentioned means comprising a valve and pipe connections whereby vapor may be delivered from said fuel source to said burners for one position of that valve and liquid can be delivered to said vaporizing means for another position of that valve.

4. A system of the type described comprising a fuel source of liquefied gas, a fuel supply line, means for delivering liquid or gas to said line from said source, a gas manifold line, a plurality of burners individually connected to said manifold line, one of said burners having a vaporizing unit in heat exchange relation therewith, means including a valve for delivering gas to said manifold or liquid to said vaporizer from said source, and a pipe connection from said vaporizer to said manifold line.

5. In the combination of claim 4, means for controlling the supply of gas to the manifold from either said source or said vaporizing means.

6. In the combination of claim 4, means for controlling the supply of gas to the manifold from either said source or said vaporizing means, and a bypass connection around said last means for supplying a limited quantity of gas to said manifold line from said source.

7. In the combination of claim 4, a pressure regulating valve in said fuel supply line.

8. In the combination of claim 4, a pressure regulating valve in said fuel supply line, and means for returning fuel around said pressure regulator from said fuel supply line to said fuel source when pressure in said fuel supply line exceeds a predetermined value.

CLARENCE O. HENNEMAN. OWEN L. GARRETSON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 60,480 Collins et al Dec. 18, 1865 785,902 Marks Mar. 28, 1905 968,233 Best Aug. 23, 1910 1,236,699 Geer Aug. 14, 1917 1,308,452 Smock July 1, 1919 1,323,922 Smith Dec. 2, 1919 2,084,297 Martin June 15, 1937 2,151,060 Tschudy et al Mar. 21, 1939 2,368,179 Turpin Jan. 30, 1945 2,475,817 Buttner et a1 July 12, 1949 2,485,391 Lasseigne et a1 Oct. 18, 1949 FOREIGN PATENTS Number Country Date 40,962 Austria Feb. 10, 1910 233,167 Great Britain May 7, 1925 260,797 Germany June 10, 1913