US939889A - Feed-water regulator. - Google Patents

Description

G .BRENT. FEED WATER REGULATOR.

APPLIOATION FILED JAN. 25, 1907.

939,889. Patented Nov. 9, 1909.

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FEED WATER REGULATOR. APPLICATION FILED JAN. 25, 1907.

Patented Nov. 9, 1909.

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CHARLES BRENT, F BRANDON, MANITOBA, CANADA.

FEED-WATER REGULATOR.

Specification of Letters Patent.

Patented Nov. 2, 1909.

Application filed January 25, 1907. Serial No. 354,007.

To all whom it may concern:

Be it known that 1, CHARLES BRENT, residing at Brandon, in the Province of Mani toba and Dominion of Canada, have invented a certain new and useful Improvement in F eed-lVater Regulators, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

This invention relates to improvements in regulators for the feed water of steam boilers and similar devices and is designed as an improvement over my prior application for feed water regulator for steam boilers filed May 16, 1904 Serial No. 208,220. In this prior application a construction of feed water regulator is shown wherein a pump, operated by steam from the boiler and supplying feed water to such boiler, is controlled by a valve which receives its operation from a weighted lever, which is held in a state of equilibrium by a ball which is in open communication with the boiler at all times and is located at a point with respect to the boiler such that the water level in the latter is maintained in said ball, and when the parts are in normal position, that is, when the water is at its proper level both in the boiler and in the ball the latter is sufiicient to counterbalance the weight upon the opposite end of the lever and steam to the pump is shut-off, but upon the sinking of the water in the boiler with a consequent sinking of the water in the ball the valve to the pump is opened and steam is permitted to pass to the pump, operate the same and thereby deliver water to the boiler.

The present invention relates to the means by which steam is supplied to the ball and also to the valve which is used for controlling the passage of steam to the feed water pump, whereby upon a slight movement of the valve the pump is given a full head of steam and water is immediately supplied to the boiler.

The invention may be further briefly summarized as consisting in the construction and combination of parts hereinafter set forth in the following description, drawings and claims.

Referring to the drawings Figure 1 shows my device applied to a boiler and feed water pump, Fig. 2 is a vertical longitudinal section through the valve casing; Fig. 3 is a section through the valve stem and the end of the valve casing, and Fig. i is a detail view of the face of the valve.

My device may be used with any preferred form of boiler but I have shown one form in the drawings which is in accordance with the requirements of my invention and in such embodiment 1 represents a boiler provided with a steam pipe 2 leading to a pump 3, connected by a water pipe & to the boiler. The steam pipe 2 is provided with a valve casing 5 having a flat internal wall 6 provided with radial disposed ports 7 and adapted to form a valve seat. These ports are in communication with the steam pipe at all times. The casing 5 is provided with a cylindrical portion 8, which forms a chamber in communication with the steam pipe from the boiler, and it is provided with a threaded cap 9 having a hollow portion 10 for the reception of a valve stem 11. A stuffing box 12 is secured to the boss 10 and prevents any leakage about the valve 7. The valve stem 11 is provided with a longitudinal opening 13 which communicates with opening let in communication with the chamber within the cylindrical part 8 whereby steam supplied to such chamber is free to pass out through said stem. The inner end of the stem 11 has a disk valve 15 taking against the face of the wall 6 and having a port 16 adapted to register with the port 7 in said wall. This valve 15 is provided with a socket 17 for receiving the end of the Valve stem 11 and a pin 18 is arranged through these parts to hold them together so that any rotation of the valve stem is conveyed to the valve itself. A coiled spring 19 is mounted between the cap 9 and the socket 1? for forcing the valve snugly against its seat. The valve casing 5 is further provided with a portion 20 opposite to the hollow portion 10 and the valve stem and having an opening 21 which is connected to a water pipe 22 leading to the boiler below the water line.

The operating mechanism for the valve 15 consists of a boss 28 threaded onto the end of the valve stem 11 and secured thereto by a check nut 24 and another boss 25 mounted in the stuffing box 26 upon the portion 20 of the valve casing, together with a yoked lever 27 secured in the bosses 23 and 25, and provided upon its end with a counter balance weight 28. Secured in the boss 25 is a water pipe 29 leading to the lower part of a ball 80 connected at the top to a steam pipe 31 secured in the boss 23 and in open communication with the opening in the valve stem 11. The pipe 29 is in open communication with the portion 20 of the valve casing whereby water supplied by the pipe 22, from the boiler, will pass into the ball 30. A petcock 32 is secured in the boss 23 for blowing off the steam line at this point.

It will be seen from the foregoing construction that when the device is set up the water level in the boiler will be maintained in the ball by reason of the water and steam supply thereto and when the water sinks in the boiler it will also sink in the ball and will thereby decrease the weight thereof and the lever formed about the bosses 25 and 23, will shift the valve 15 and bring about the registration of the ports 7 and 16, which up to this time have been out of alinement, and deliver steam to the pump, supplying feed water to the boiler. In this way the water level in the boiler may be maintained at a fixed point.

Having described my invention, I claim:

1. In a feed water regulator, in combination, a boiler, a pump for supplying water to said boiler, a steam line from said boiler to said pump, a valve casing in said steam line, a valve within said casing, a hollow stem for said valve and having an opening communicating with the steam space of said casing, a weighted lever carried by said valve stem and normally tending to open said valve, a reservoir on said lever for counteracting the elfect of said weighted lever a pipe in communication with the opening in said valve stem for supplying steam to said reservoir and a suitable connection between said reservoir and the water space in the boiler, said pipe and said last mentioned connection serving to maintain a water level in the reservoir corresponding to that in the boiler.

2. In a feed water regulator, in combination, a pump for supplying water to said boiler, a steam line from said boiler to said eases pump, a valve casing in said steam line, a portion projecting from one side of said valve casing and having a water supply opening therein, a valve within said casing, a hollow valve stem for said valve and projecting out of said casing in an opposite direction to said portion having the water supply opening, the opening in said stem having communication with the steam space in said valve casing, a weighted lever secured to said valve stem and pivotally mounted upon the water supply portion projecting from said casing, a water pipe secured to said lever and in open communication with the water supply opening, a receptacle also mounted upon said lever and in communication with said water pipe and adapted to receive water therefrom, and a steam pipe connected to said receptacle and in open communication with said hollow valve stem.

3. In a feed water regulator, in combina tion, a boiler, means for supplying water to said boiler, a steam line from the boiler to said water supply means, a valve casing in said steam line, a valve in said casing and having a plurality of ports, a valve seat in said casing also having a plurality of ports adapted to be arranged normally out of registration with the ports of said valve when it is closed, a hollow stem for said valve passing out of the casing and having an opening communicating with the steam space thereof, means normally tending to shift said valve into an open position, a reservoir communicating with said hollow stem for counteracting the tendency of said valve shifting means and adapted to be supplied with water and means whereby water and steam may be supplied to said reservoir so that the water level in the boiler may be maintained in the reservoir.

In testimony whereof I affix my signature in the presence of two witnesses.

CHARLES BRENT. Witnesses GEORGE H. DRAPER, MICHAEL J. GALVIN.

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