US1439208A

US1439208A - Feed-water regulator

Info

Publication number: US1439208A
Application number: US266869A
Authority: US
Inventors: Vincent V Veenschoten
Original assignee: Individual
Current assignee: Individual
Priority date: 1918-12-14
Filing date: 1918-12-14
Publication date: 1922-12-19
Anticipated expiration: 1939-12-19

Description

tures of my invention.

Patented Dec. 19,

were.

-VIJTCENT V. VEENSGHDTEN, 0F ERIE, PENNSYLVANIA.

FEEDJNA'IER .REGULATOR..

Application filedifieoemcer 16, 1918. Serial No. 268,389.

To all whom it may concern Be it known that l Vrnonzvr V. Van SOHQTEN, a citizen of the .United Statesresiding at Erie in the county of Erie and State of Pennsylvania have invented certain new and useful Improvements in lfleed- Water Regulators of which the following is a specification.

This invention relates to teed-water regulators, and particularly to regulators which are adapted to generatesteam; the pressure of which dependsupontheelevation of the.

water in the boiler, and to operate by this steam the vfeed-water valve. In general the object of the invention is to provide improved means .for controlling the water-level elevation in the boiler, particularly .with

reference to the demand for steam on the boiler, .and to provide suitable adjusting means for such purposes.

Of the accompanying drawings Fig. l is an elevation more or less diagrammatic of a boileu and a boiler feed-water regulator connected therewith which embodies fea- Fig. 2 is a central sectional view of the regulatorand the feed- .water valve controller and the valve. Fig

3 isan elevation of thecontroller and valve;

and Fi g. dis a modified form of the feedwater valve controller. a

The regulator 19 comprises a tube 27,

which :is connected. by means of pipes 28 and 29, above and below the water-level in. the boiler 30. The tube 27 therefore has more or less steam in its upper end and water in its lower end, depending uponthe elevation of the water-level the boiler. Enclosing this tube 27 is a tube 31 uartly filled with water 32, iLIlClftllG tube 33, the tank 34 and the tube 35 connect the tube 31 with the diaphragm controller 36 In operation; the water in the boiler sinks steam will be generated in the tube 31 of the regulaton due to the increasing; amount of steam in the tube 27'; and the pressure of the steam generated will depend much upon the elevation of the water in the tube 27. Thus the pressureof thesteam generated, and hence the fluid pressure in thediaphragm chamber 4.4 will. depend more or less on the elevation of the water in the boiler; and this pressurein turn by means of the diaphragm and the members connecting it with the plunger 37, will determine the positionof the plunger; and hence will determine the amount of flow of water to the boiler through the teed-water valve 39.

' In use it hasbeen ioundthat amoiiint oi": water in the regulator tube 31 continually decreases, and has to be replaced periodically; so that the water-level in the tube may vary greatly. and hence is often uniform the elevation of the water in the tube 31, l have connected the pipe to the tube 31 at substantially the desired waterlevel elevation in the tube; and have also connected the .tube 33 with the. reservoir This reservoir has a very material horizontal cross sectioncomymred with the smaller section of the generator tube and, hence,

by the insertion of the reservoir in the manner shown. the water-level in the tube 31 will beimaintained at substantially the same elevation as the water-level in the reservoir.

because. as the water in the tube 31 passes off by leakage of steam .or otherwise the Water will flow from the reservoir into the tube; anch in EMldltlOlL it is'impossible'ttor the water in the tube 31 to be forced below the entrance to the tube of thepipe In order to supply water to the reservoir l tany suitable means may be prov ded. I

prefer for this purposea pipe 40 connected with any suitable source of :water supply under pressure passing downwardly from the reservoir to a point Whereit can be con; venientlv reached by the operator incharge. I provide, also, asimilar pipe 4:1 leading tothe. same point,,ancl which is adapted to release the pressure in the reservoir so as to allow the water to flow into the reservoir when both valves 37 and 38 are opened. The pipe 41 opens into a sink, or other suitable receptacle; and the water will flow therefrom as soon as the reservoir is suflicientlyvaries correspondingly.

filled; and this will indicate to the operator the fact that sufiicient water has been supplied. 1

By the use of the generator, with the auto matic water-level controller 342 therefor, maintaining substantially uniform the water-level in the tube 31, the pressure of the steam in the tube 31 varies inversely with the el vation of the water-level inthe tiveness I provide operating means connect-- I A. L,

ing the diaphragm to the valve plunger which comprise the rotating spindle 4-2 rotatably mounted in and-passing through the stuffing box' 43, instead of the ordinary form of reciprocating valve stem, thereby materially reducing the force required to operate this connecting mechanism.

In order to provide for movement of the valve plunger unlike the movement of the diaphragm, the lever arm may be made longer or shorter than the lever arm 46; ii longer the movement of'the diaphragm will be more than the movement of the valve plunger, and if shorter the movement of the diaphragm will be less. To adjust the relative movements of these two elements 1 provide openings 47 in the lever arm 45, so

that the connecting stem a8 may be connected to the arm where desired; and in order to allow the stem 48 to be always sub stantially vertical 1 provide openings $9 in the frame 50 so that the diaphragm yoke 51 may be shifted to theproper position on the frame to maintain a vertical position of the stem.

Variations in the relative movement of the diaphragm and theplunger are desirable in order to vary the variations in boiler water-level elevations due to the variations in load on the boiler; the greater the relative movement of the valve plunger the greater the amount of variation in water inflow for a given change in diaphragm movement. and hence for a given change in water-level elevation.

As a consequence the greater the relative movement of the valve the smaller will be the variations in the boiler water-level elevations due to variations in load.

In operation as the feed-water valve opens more and more the drop in water pressure therethrough ordinarily decreases and, if the plunger ports 55 have parallel sides, the flow of water therethrough does not increase in proportion to the movement of the valve. As a consequence, the rate or" change of the water-level elevation in the boiler, due to changes in load will be less with heavy loads than with light loads; while, if there is any difference, itis usually preferable to have the greater efi'ect with heavy loads than with light loads, as variations in boiler water-level elevations with heavy loads is more dangerous than with light loads.

Therefore, to oilset the drop in pressure through the valve with increasing inflow, 1 provide the non-parallel ports through the plunger so that as the plunger opens further, and the drop in pressure therethrough decreases, the area of the openings of the ports will increase at a rate greater than the actual. movement of the plunger. By properly forming the angle between'the sides of the port the inflow may be main tained proportional to the movement of the plunger, or, if desired, it may be made to increase at a greater rate than the moveinent of the plunger and to thereby cause thewater-level variations with heavy loads to be less, for a given change in water-level than with light loads.

Fig. a shows a modified form of the means for connecting the diaphragm with the valve plunger comprising the levers and 61, connected respectively to the diaphragm and to the plunger, so that a double leverage is produced, and the movement of the plunger is materially greater than the movement of the diaphragm; and the amount of the relative movements or the two may be varied by means of the

openings

62 and 63 in the lovers, the fulcrum of the lever 60 being varied accordingly by means of the openings 64.

I claim as my invention: y The combination of a feed-water valve having a casing, and operating means for operating said valve, and a frame for supporting said operating means fixed with reference to said valve casing, means operatively connecting said operating means and said valve, said latter means comprising an arm operatively connected with. said valve. and means for adjusting the position of said frame with reference LO said casing in a direction substantially parallel with said arm, and means for correspondingly shifting the connection of said operating means with said arm.

In testimony whereof, I hereunto set my hand.

VINCENT V. VEENSCHOTEN.