US1502564A - Steam-boiler plant - Google Patents

Description

July 22 1924. 1,502,564

F. HEATH STEAM BOILER PLANT Filed Jan. 26, 1923 s Shgets-Sheet 1 F. HEATH STEAM BOILER PLANT July 22, 1924. 1502;564

Filed Jan. 26, 1923 3 Sheets-She 2 I Minn 1|| III Patented July 22, 1924.

warren STATES PATENT QFFICB FREDERICK HEATH, F BELLINGHAM, WASHINGTON STEAM-BOILER PLANT.

Application filed January 26, 1923. Serial No.'615,'122.

plants which use 'oil as fuel and the primary object of the invention is to provide novel means whereby the flow of fuel will be automatically cut off if a leak should develop in the oil delivery line. Another object of the invention is to provide means whereby a reduction of pressure in the oil delivery line will cause the flow of steam to the oil pump to be cut olf so that the feeding of oil will be arrested until the pressure-reducing cause be overcome. Another object of the invention is to provide'an oil-controlling valve which will automatically out off the flow of oil upon a reduction of pressure in the oil delivery line and which must 'be manually set to restore workingcon'ditions thereby avoiding premature opening of the valve with resultant loss of fuel; Other incidental objects of the invention will appear in the course 'of the following description, and the invention resides 'incertain novel features which will be particularly pointed out in the appended claims.

In the accompanying drawings;

Figure 1 is an elevation of a'portion of a boiler plant having my present invention embodied therein;

Figure 2 is an enlarged vertical section of the oil control valve;

Figure 3 is a detail section .on'the line 33 of Fig. 2;

Figure l is a l4 of Fig. 2;

Figure 5 'is an enlarged elevation of the plug or piston member of the oil "control valve;

Figure tion of the steam control valve;

Figure 7 is an enlarged section of the working member or piston of the steam control valve. I

The boiler furnace 1 may be of any preferred design and may be one of agangof boilers. It is equipped with oil burners 2 detail section on the line "in the steam line.

6 is an enlarged longitudinal secof any approved type and the oil to supply these burners is drawn from a convenient source of supply through a suction pipe 3 by a pumpl. Steam to drive the pump is led thereto through a steam line 5 connected with the steam space of the boiler and a steam control valve 6 is interposed A branch line 7 leads to an arch-chamber 8 and a bypass 9 is provided around the said branch line while a pressure gage '10 is fitted to the branch line. The oil deli-very line '11 connects the discharge port of the pump 4 with the burners V 2 and a meter 12 is fitted in the saidrline, a by-pass 13 being provided around the meter. Heaters 14 are connected with the oil delivery pipe and, through a branch 15, with the steam line so that'the oil may be heated, if desired, before passing to the burners in order that it may be readily atomized at the burners and consequently burn freely andproduce a hot-flame. The relation and arrangement of the parts thus far men; tioned may be varied to meet conditions and the illustration in t Figure 1 is largely conventional.

An oil control valve 16 is vfitted in the oil deli-verylineclose to'the pump and the discharge side of this valve is in communiis connected with'the discharge port or outlet of the pump, and also provided with an outlet port 20 from which the oil delivery line 11 *leads and which is preferably diametrically opposite the inlet port. A partition or web "21 is provided within the easing-18 'and'extends vertically from a point above the outlet port downwardly to a horizontal "web .or partition 22 which projects inwardly (from the side wall of the casing at a point near the'bottom-of the same, the interior of'the casing being thereby divided into a pressure chamber 23 and a passage at leading to the outlet port. A port or opening 25 :in the web 22 establishes communication between the chamber 23 and the passage Q L, and a circular boss 26 is formed on the upper :side of the partitionor web 22, the upper side of this boss'being inclined downwardly toward the web '21 as clearly shown at 27" in Figure 2. Within the chamber 23 and alined axially'with the opening 25 and the boss '26 isa barrel or piston guide and support 28 having its lower end inclined, as at 29, so as to lie parallel with the surface 27, the barrel being supported fixedly within the casing, as by arms 30 cast integral with the casing and the barrel. A free piston 31 is slidably mounted in the barrel with its lowerend adapted to enter the boss 26 and rest upon an internal annular shoulder 32 therein, the piston being provided intermediate its ends with an annular shoulder 33 to engage an annular internal shoulder 34 in the barrel and having a flange or bead 35 at its upper end to rest upon the upper end of the barrel. The piston will thus'be firmly supported in its lowest position without jamming and may be readily unseated when the apparatus is to operate. The piston is also con structed with annular grooves 36 to receive piston packing rings 37 so as to have fiuidtight sliding fit in the barrel. It will be readily understood that the oil entering through the port 19 fills the chamber 23 and surrounds the barrel 28, and it will be readily noted upon reference to Figure 2, that the piston, when in its lowest position, ex tends across the space between the surfaces 27 and 29 and fills the bore of the boss 26 so that the oil will be held in the pressure chamber. To permit the oil to escape, it is obviously necessary to raise the piston so that at least a portion of the space between the surfaces 27 and 29 will be'opened to the bore of the boss 26, and to accomplish this result I provide a plunger or lifting pin 38 which is aligned axially with the piston and is slidable through a gland 39 in the bottom of the valve casing. V The lower end of the plunger is pivoted to a lever or handle 40 which is fulcrumed upon a bracket or hanger 41 depending from the valve casing. By swinging the handle upwardly, the plunger is carried against the lower end of the valve piston and caused to raise and unseat the same. 'As the lower end of the valve piston clears the lowest point of the surface 27 oil will flow into the port 25 and thence through the passage 24 to the oil-delivery line. The volume .of the outfiowing oil will increase as the piston rises across the escape opening between the surfaces 27 and 29 until the lower end of the piston is within the barrel at which time the maximum flow will be established.

On top of the casing 18 is secured a yoke or open frame 42 in which is mounted a stop rod 43 which is alined axially with the valve piston and is adjustable, toward and from the same through its threaded connection 44 with the top of the frame 42, a handle wheel 45 being provided on the upper end of the rod to facilitate its manipulation. Immediately below the threaded portion of the rod, a pointer disk 46 is carried by the rod to coact with graduations to accurately setthe tube.

47 on the frame and enable the operator to accurately adjust the device. If the rod be set in its lowest position, it will bear upon the piston and thereby prevent opening of the valve, and as the rod is raised it will permit the valve to be opened to a greater or less extent so that the volume smooth-bored pressure-gage tube 48 is fitted around the stop-rod 43 and a hand wheel 49 on this tube coacts, as a pointer, with the graduaticns 47 to enable the operator The lower end of the tube has a threaded connection 50 with the bore of a gland 51 fitted in the top per end of the piston so that the valve will be balanced. If it be found that the valve tends to close, the exposed area of the upper end of the piston may be further reduced by setting the tube 48 against the piston as will be readily understood. 7 I

When the apparatus is operating normally, the pressure of the oil will keep the valve open and the oil will flow to the burners. Should a leak develop in the oil-delivery line or the pressure be reduced from any other cause between the oil control valve and the burners, the valve piston will at once drop to its seat and cut off the fur ther flow of oil. Obviously, the valve will not open automatically but the unseating lever or handle must be raised to effect the opening and, if the handle be raised before the leak is closed, the pressure under the valve will be insui'iicient to hold it open and it will close as soon as the handle is released. Premature opening of the valve is thus avoided.

The steam control valve comprises a casing 52 having an inlet port 53 in one side and an outlet port 54 in its opposite side, and having a cylindrical chamber 55 between and communicating with the ports. Slidably mounted in the cylinder is a piston 56 having an annular groove 57 intermediate its ends. When the groove registers with the inlet and outlet ports, flow of steam is permitted and the pump will be pansion spring 61 which bears upon the ad-.

jacent end of the piston and tends constantly to move the same to the closed or cut-oil position. A secondary piston 62 is carried by the piston rod and plays snugly in a secondary cylinder 63 formed in the valve casing in axial alinement with the cylinder 55, and an oil inlet port 64 leads through the wall of the valve casing into said cylinder 63 at the outer side of the piston 62 so that the pressure of the oil will be exerted upon the piston in opposition to the force of the spring 61. The piston rod extends through the valve casing and has its outer end attached to a hand lever 65 fulcrumed upon a post or bracket 66 projecting from the valve casing. Normally the pressure of the oil will overcome the force of the spring 61 and the valve will be held in the position shown in Figure 6, having been set in that position by manual manipulation of the handle 65 when the operation of the apparatus is started. Should there be a reduction of pressure in the oil-delivery line, that reduction will be at once manifested through the by-tube 17, which is connected in the port 64c, with a like reduction in the cylinder 63 so that the spring 61 will expand and force the piston to closed position, cutting off the steam and stopping the pump. When normal conditions have been restored, the valve may be reopened and the operation of the apparatus resumed.

From the foregoing descriptions, taken in connection with the accompanying drawings, it will be seen that I have provided a very simple apparatus which will automatically cease to operate upon the developm nt of a leak in the oil-delivery line. The controlling valves are very sensitive and will respond instantly to a very slight reduction of pressure so that the possibility of hot oil being scattered upon the boilers and starting a disastrous fire is rendered negligible. In starting the apparatus, the handle is swung upward to carry the lifting plunger 38 against the piston to unseat the latter which may be set to the desired working pressure by adjusting the rod 43 and tube 48 Having fully described my invention what l claim as new and desire to secure by Letters-Patent, is

1. The combination of an oil burner, a pump, an oil line connecting the pump with the burner whereby oil under pressure will be supplied to the burner, and an oil-control valve interposed in the oil line, said valve closing upon reduction of pressure in the oil line whereby to cut oti the further flow of oil. a i

2. The combination of an oil burner, a pump, an oil line connecting the pump with the burner whereby to supply oil under pressure to the burner, an oil-control valve interposed in the oil line operable to close upon reduction of pressure in the oil line whereby to cut off the flow of oil, and manually operable means to set the valve in open position.

3. The combination of an oil burner, an oil line leading to the burner, means for feeding oil under pressure through the oil line, avalve casing interposed in the oil line, and a valve piston in said casing responsive to pressure in the oil line whereby to close and cut ofl the flow upon reduction of the pressure.

4. The combination of an oil burner, a pump, an oil line leading from the pump to the burner whereby fuel may be delivered under pressure to the burner, a valve interposed in the oil line to control the flow there through and arranged to cut off the flow upon reduction of pressure in the oil line between itself and the burner, a valve con trolling the flow of steam to the pump and in communication with the oil line to be normally held open by the pressure in the oil line, and means for closing said valve upon reduction in said pressure.

In testimony whereof, I have signed this specification in the presence of two subscribing witnesses.

FREDEBICK HEATH.

Vitnesses:

BERTON ALnRoN HUNTooN, HENRY BAILEY DRISKO.

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