US1372200A - Pressure-regulator for steam-boilers - Google Patents

Description

A. SCHOLZ.

PRESSURE REGULATOR FOR STEAM BOILER$.

APPLICATION FILED NOV. 5. 1919.

1,372,200. Patented Mar. 22,1921

:. INVENTOR AON EY PATENT OFFICE.

ADOLF SCHOLZ, OF NEW YORK, N. Y.

PRESSURE-REGULATOR FOR STEAM-BOILERS.

Specification of Letters Patent.

Patented Mar. 22, 1921.

Application filed November 5, 1919. Serial No. 335,799.

To all whom 2'23 may concern:

Be it known that I Aoonr Scnopz, a citizen of the United btates, and resident of the city of New York, in the county of New York and State of New York have invented a certain new and useful lressure- Regulator for Steam-Boilers, of which the following is a specification.

This invention relates to devices that are utilized for automatically regulating the pressure of steam boilers, and particularly to the type of regulator which is operated by the pressure of the steam generated by the boiler in connection with which it is installed, and the damper and air doors of which it controls to cause generation of the steam at a uniform pressure. l

The principal object of my invent on is to provide a simple, inexpensive, efiiciently operating and improved automatic pressure regulator for steam boilers, of the above stated type, which may be installed conveniently and economically, and which when in operation may at all times be readily, rapidly, and conveniently set to accurately control the damper and air doors of the boiler for generating the steam at any predetermined pressure desired.

Other objects and advantages Wlll hereinafter appear.

I11 the accompanying draw1ngs,-

Figure 1 shows an elevation of the pressure regulator, partly in section.

Fig. 2 is a plan view of the regulator shown in Fig. 1.

Fig. 3 is a side elevation of the regulator, on a reduced scale.

The cylinder 1 of the regulator is closed at the lower end thereof by a head 2 and at its upper end by a head 3, which heads are secured in place by bolts 4 in the usual manner. A piston 5 located in the eyllnder 1 is slidable upwardly and downwardly therein and is secured to a rod 6, which extends upwardly therefrom and passes through a centrally located hub 7 that forms part of the head 3 andserves as a guide for the rod. A pipe 8 passes through the lower head 2 to which it 1s secured and from which it extends over to the steam portion of the boiler, not shown, in connection with which the regulator is installed, whereby the steam frdm the boiler enters the lower part of the interior of the cylinder 1, between the piston 5 and the head 3. Above the head 3 is lorated a sleeve 9 which embraces the rod 6 and is therefore adjustable upwardly and downwardly therealong, and a set screw 10 passes through the sleeve 9 and serves to secure said sleeve to the rod at any position to Which it may be adjusted. lhe rod 6 passes through a central opening 11 formed in a flatmetal crossbar 12, whereby said bar is slidable upwardly and downwardly along the rod, and a spring 13 is located between the bar 12 and the sleeve 9 and is coiled around said rod. Two bolts 1 1 secured to the head 3 extend therefrom upwardly and pass through openings formed 111 the extremities of the cross-bar 12, and thumb-nuts l5 thread over said bolts against the top surface of said cross-bar. A rockshaft 1.6 is mounted in a pair of bearings 17 secured to said head by means of screws 18. Said shaft carries a lever 19 keyed thereupon between the bearings 17 and is provided with a pin 20 that enters a forked extension 21 formed upon the sleeve 9. To the extremity 22 of the rock-shaft 16 is secured an arm 23 which is pivotallyjoined to a series of links 24 that is in turn joined to the ash-pit doors of the boiler, while to the opposite extremity 25 of said shaft is secured a similar arm 26, which is pivotally joined to a series of links 27 that is in turn joined to the damper of the boiler. A blow out valve 28 serves to dis charge any steam that may accumulate on the upper side of the piston 5 through leakage.

In the operation of this pressure regulator, steam is first generated in the boiler until it is brought up to a certain desired pres sure, as can be ascertained from the pressure gage of the boiler. Steam at said predetermined pressure thereupon enters the cyl- V inderl through the pipe 8 and forces the piston 5 upwardly. The thumbscrews 15 are then threaded downwardly to force down the bar 12 and thereby compress the spring 13 against the sleeve 9 secured to piston-rod 6, until the spring exerts a downward pressure upon the rod 6 equal to the upward pressure exerted by the steam-pressed piston 5. Under this conditionthe spring'and steam pressures upon the opposite sides of the piston 5 equalize and tend to maintain said piston at about midway between the cylinder heads 2, 3, while the series of links 24, 27 are so connected to the ash-pit doors and damper respectively that they maintain these partially open, so as to create just sufficient draft to heat the furnace to a temperature capable of generating steam at the desired predetermined pressure.

Should the steam pressure in the boiler now mount higher than required, it would cause the piston 5 to rise and thereby move the rod 6 with its secured sleeve 9 upwardly contrary to the pressure of spring 13, and the sleeve 9 moving upwardly would swing the lever 19, through the slidable and pivoted coactionof the pin 20 of the latter with the forked end 21 of the former, and rock the shaft 16, which would cause the arms 23, 26 to swing in a clockwise direction, as viewed in the drawing. Said movement of the arms 23, 26 would thereupon be transmitted to the links 24, 27 which would actuate the ash-pit doors and damper to close fully or partially more, to shut off or reduce the draft, in which manner the temperature of the furnace would be lowered and the seam pressure consequently reduced until it would be restored to that normally required. Should the steam pressure in the boiler thereafter drop below the amount required, the opposite operation would take place and the piston 5 would sink under exertion of the spring 13, and the sleeve 9 would thereupon swing the lever 19 and rock the shaft 1.6 oppositely and swing the arms 23, 26 in a counterclockwise direction. The movement of said arms would then actuate the links 24', 27 to open the ash-pit doorsand damper more fully, increase the draft and temperature of the furnace, and consequently raise the steam pressure in the boiler to the predetermined extent required. In

, this manner the pressure regulator will operatecontinually while the boiler is in operation to automatically open and close the air-doors and damper and thereby maintain the steam in the boiler at the uniform desired pressure. In case it should be desired to operate the boiler to generate a higher or lowersteam pressure the regulator may be reset for such purpose in the above described manner, 6. 0., the steam may be raised to the pressure required as indicated by the gage, aild the nuts 15 maybe threaded to adjust the power spring 13 to just balance the upward pressure exerted against the piston 5 by the steam, after which the regulator will continue'to function under its reset conshaftlt} to alter their angularity, and then retightening said screws. Further compensation for such purpose may be made by unthreading the set-screws 10 and therewith adjusting the position of the sleeve 9 along the rod 6 to a different elevation, to thereby alter the angularity of swinging of the arms 23, 26. It will be evident that with the aforesaid adjustments the pressure rogulaof the rock-shaft 1G, and the transmission thereto of the movement of the piston-rod 6 through the slidable and pivotal joint 20, 21 the pressure regulator is rendered highly responsive to varying steam pressures in the boiler and is greatly conducive to very eliicient operation ol" the regulator, since said rock-shaft is capable of imparting a large throw to the arms 23, 26 and thereby amplifies the comparatively small movement of the piston 5 to a much larger movement of the said doors and damper. The regulator has been thus found to be responsive with complete accuracy to controlling uniformly steam pressures as low as two pounds. It will be further evident that, if desired, the regulator may be operated to control the damper only, leaving the control of the ashpit doors entirely optional with the user, in which case all that is required is removal of the arm 23 from the apparatus, by unthrcading its set-screw l8.

Variations may be resorted to within the scope of the invention and portions of the improvements may be used without others.

Having thus described my invention, 1 claim 1. A pressure regulator for steam boilers having the combination with a cylinder, a piston therein actuated by the steam from the boiler, and connections joining the damper and air door of the boiler with the rcgulator, of a head for said cylinder secured thereto, a piston-rod passing through said head and guided thereby, a sleeve adjustable along said rod, means to secure said sleeve to the rod in any adjusted position, a crossbar through which said rod is slidublc, :1 spring located between said sleeve and said bar surrounding said rod. :1 pair of bolts secured to said head passing through said bar, nuts threading over said bolts bearing against said bar to regulate the pressure of said spring against said sleeve, a rock-shaft mounted upon said head, a lever extending from said shaft joined pivotally and slidably to said sleeve, arms extending from said shaft joined pivotally to said connections, and means to adjust the angularity of said arms relatively to said shaft.

2. A pressure regulator for steam boilers till li 'O llh having the combination with a cylinder, a piston therein actuated by the steam from the boiler, and connections joining the damper and air door of the boiler with the regulator, of a head for said cylinder secured thereto, a piston-rod passing through said head and guided thereby, a member secured to said rod, a cross-bar through which said rod is slidable, a spring located between said member am and ear surrounding said 1.0a,

a pair of bolts secured to said head passing through said bar, nuts threading over said bolts bearing against said bar to regulate the pressure of said spring against said member, a rock-shalt mounted upon said head, a lever extending from said shaft joined pivotally and slidably to said member, and arms extending from said shaft joined pivotally to said connections. V

3. A pressure regulator for steam boilers having the combination with a cylinder, a piston therein actuated by the steam from the boiler, and connections joining the damper and air doorof the boi er with the regulater, of a head for said cylinder secured thereto, a piston-rod passing tl'irougl said head and guided thereby, a member secured to said rod, a cross-bar through which said rod is slidable, a spring located between. said member and said bar surrounding said rod, apair of bolts secured to said head passing through said'bar, nuts threading over said bolts bearing against said bar to regulate the pressure of said spring against said member, a rock-shaft mounted upon, said head, a lever extending from said shaft joined pivotally and slidably to said member, and means to join said shaft with said connections.

i. A. pressure regulator for steam boilers having the combination with a cylinder, a piston therein actuated by the steam from the boiler, and connections joining the damper and air door of the boiler with the regulator, of a head for said cylinder secured thereto, a piston-rod passing through said head and guided thereby, a member secured to said rod, a cross-bar through which said rod is slidable, a spring located between said member and said bar surrounding said rod, a pair of bolts secured to said head i iassing through said bar, nuts threading over said bolts bearing against said bar to regulate the pressure of said spring against said member, a roclr-shaft mounted upon said head, means to transmit the movement or" said member to said shaft, and means to join said shaft with said connections.

5. A pressure regulator for steam boilers having the combination with a cylinder a piston therein actuated by the steam from the boiler, and connections joining the clamper and air door of the boiler with the regulater, of a head for said cylinder secured thereto, a piston rod passing through said head and guided thereby, a member secured to said rod, a spring surroundnig said rod bearing against said member, means coopcrating with said rod to regulate the pressure of said spring against said member, a rock-shaft mounted upon said head, means to transmit movement of said member to said roclr-sl1aft,and means joining said shaft with said connections.

(3. 1h. pressure regulator for steam boilers having the combination with a cylinder, and a piston therein actuated by the steam from the boiler, of a piston rod, a sleeve adjustable aloug said rod, means to secure said sleeve to the rod in any adjusted position, a crossbar through which said rod is slidable, a spring located between said sleeve and said bar surrounding said rod, a pair of fixed bolts passing through said bar, nuts threading over said bolts bearing against said bar to regulate the pressure of said spring agaii'lst said sleeve, a rock-shalt mounted in fined bearings, a lever fixed to said shaft joined pivotally and slidably to said. sleeve, and means to transmit the actuation of said shaft to the damper and air doors of the boiler.

7. A pressure regulator for steam boilers having the combination with a cylinder, and a piston therein actuated by the steam from the boiler, of a piston rod, a member secured to said rod, a crossbar through which said rod is slidable, a spring located between said member and said bar surrounding said rod, a pair of fixed bolts passing through said bar, nutsthreading over said bolts bearing against said bar to regulate the pressure of said spring against said member, a rockshatt mounted in fixed bearin s, a lever fixed to said shaft joined pivotall y and slidably to said member, and means to transmit the actuation of said shaft to the damper of the boiler.

8, A pressure regulator for steam boilers" the boiler, of a piston rod, a member secured to said rod, a cross-bar through which said rod is slidable, a spring located between said member and said bar surrounding said rod, a pair of fixed bolts passing through said bar, nuts threading over said bolts bearing against said bar to regulate the pressure of said spring against said member, a rockshattt mounted in fixed bearings, means to transmit the movement of said member to said shaft, and means to transmit the actuation ol said shaft to the damper and air doors of the boiler.

9. A pressure regulator for steam boilers having the combination with a cylinder, and

a piston therein actuated by the steam from cross-bar throu h which said rod is slidable, a spring locatecfbetween said sleeve and said bar surrounding said rod, a pair of fixed bolts passing through said bar, nuts threading over said bolts bearing against said bar to regulate the pressure of said spring against said sleeve, and means to transmit the actuation of said sleeve to the damper of the boiler.

10. A pressure regulator for steam boilers having the-combination with a cylinder, and a piston therein actuated by the steam from the boiler, of a piston rod, a member secured to said rod, a spring surrounding said rod bearing against said member, means 00- operating with said rodto regulate the pressure of said spring against said member, a rock-shaft mounted in fixed bearings, means to transmit the movement of said member to said shaft, and means to transmit the actuation of said shaft to the damper of the boiler.

11. A pressure regulator for steam boilers having the combination witha cylinder, and a piston therein actuated by the steam from the boiler, of a piston rod, a member secured to said rod, a spring surrounding said rod bearing against said member, means movable along said rod cooperating therewith to regulate the pressure of said spring against said member, a rocleshaft mounted in fixed bearings, means to transmit the movement of said member to said shaft, and means to transmit the actuation of said shaft to the damper of the boiler.

12. A pressure regulator for steam boilers having the combination with a cylinder, and piston therein actuated by the steam from the boiler, of a piston rod, a member adjustable along said rod, means to secure said member to said rod in any adjusted position, a spring surrounding said rod hearing against said member, means movable along said rod cooperating therewith to regulate the pressure of said spring against 1 said member, a rock-shaft mounted in fixed bearings, means to transmit the movement of said member to said shaft, and means to transmit the actuation of said shaft to the damper of the boiler.

Signed at the city of New York, in the county of New York, and State of New York, this 3rd day of November, A. D. 1919.

ADOLF SCHOLZ.

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