US757002A - Valve for regenerative furnaces. - Google Patents

Description

No. 757,002. PATENTED APR. 12, 1904.

J. M. WIGHT & H. HYATT.

VALVE FOR REGBNERATIVE FURNACES. APPLICATION IILED JUNE 5, 1903.

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No. 757,002. PATENTED APR. 12, 1904. J. M. WIGHT & H. HYATT.

VALVE FOR REGENERATIVE FURNACES.

APPLICATION FILED JUNE 5, 1903.

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UNITED STATES Patented April 12, 1904.

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JAMES WIGHT AND HARRY HYATT, OF CLEVELAND, OHIO.

VALVE FOR REGENERATIVE Fl JRNACES.

SPECIFICATION forming part of Letters Patent No. 757,002, dated April 12, 1904.

Application filed June 5, 1903. Serial No. 160,154. (No model.)

To all whom it may concern:

Be it known that we, JAMES M. WIGHT and HARRY HYATT, citizens of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented new and useful Improvements in Valves for Regenerative Furnaces, of which the following is a specification.

This invention relates to water-cooled valves for regenerative furnaces, and is particularly characterized by a novel and simple construction of the valve itself and the means for cooling the same and by an improved system of valves for controlling the gas circulation to and from a pair of regenerators.

In regenerative-furnace practice,where continuous running of the furnace is of the utmost importance, the durability of the valves is an important consideration, and another is the ease with which the disabled parts may be replaced. By means of our invention both of these features are obtained, the only moving part exposed to the destructive action of the hot gases being a thoroughly cooled cylin:

drical valve with no inside bearings, stems, or hangers, supported entirely from the outside, and when renewal is required it may be done very quickly, as the valve may be lifted out of the box at once and a new one inserted, the valve itself forming part of the cover to the box and in no way inclosed by or'attached to it.

An important and novel feature is that the valve or moving part is not contained in the box, but merely projects into it, forming part of the cover itself, maintaining at all positions an external seal and by this construction permitting speedy removal for repair or renewal.

The valve-cylinder has a very large surface exposed to the air,which adds materially to its coolness, thus requiring the minimum amount of water. The large area of surface exposed to the air by the upper trough also tends to keep the water cool.

A single stationary inlet for water and a successive use of the water in the cylindrical valve, the upper trough, and the lower trough makes the cooling system very simple and economical. A large volume of water in each provides against the breaking of the seal from any temporary stoppage of the water-supply.

Further improvements and advantages will be apparent from the following description and the accompanying drawings, in which- Figure 1 is a vertical section of one of the valves. Fig. 2 is a plan view of the valve system; and Fig. 3 is a vertical section thereof, showing in elevation means for operating the valves.

' Referring particularly to Fig. 1 of the drawings, each valve comprises specifically a hollow vertical cylinder 1 with a head 7 near its bottom in a box or casing placed over a vertically-opening top or port 2 of fiues,to be hereinafter described. This cylinder is adapted to be raised and lowered over the flue-opening to open or close the connection between the box and flue. The cylinder 1 and head 7 have double walls to contain water for cooling purposes. Depending from the top of the cylinder is another cylinder 13 of larger diameter, projecting into an annular external seal-trough 6, filled with water,which forms the upper section of the box or casing and is of suflicient depth to permit full lift to the cylinder without coming out of the water, thus forming an external seal preventing any escape of gas from the box. The bottom section of the box comprises another annular trough 1 around the flue-opening, so that when the cylinder is down the lower edge thereof enters water in. the said trough and seals the port from the side flueport 3. The middle section of the box (indicated at 5) is fire-brick lined and provided with outlet on one side suitable for connection to stack-flue or gas-box through the side connection 3.

Simplicity of construction of the casing or box is apparent, being of three parts only, the bottom circular trough with' its central opening, the middle section with its side outlet lined with fire-brick, and the circular top trough resting on the middlesection, which in turn rests in the bottom section. The middle section 5 has a bottom 14:, which covers all the interior water-surface of the bottom trough except an annular space for the re ception of the lower rim of the cylinc ler-valve when down, allowing but the minimum surface of water exposed for evaporation inside the box, which evaporation is detrimental to the working of the furnace. Depending from this bottom cover is a flange 15, dipping below the water to seal the box externally at this point. This flange rests on ribs r in the lower trough, and thus supports the parts above.

The water-supply pipe is indicated at 10, from which the water flows visibly into a pipe 10, which extends between the walls of the cylinder-valve, the overflow from which passes into the external seal-trough 6 and thence through the pipe 11 into the seal-trough 4, whence it overflows to the waste pipe 12. The visible water-supply between the pipes 10 and 10 is important, inasmuch as it permits ready detection of stoppage in the water flow.

At 9 is indicated the hanger for the valve, whereby it is attached to the operating means to be hereinafter described.

Several of the valves above shown are embodied in the system indicated in Figs. 2 and 3, the valves being indicated as a whole at 30, 31, 32, 33, and 34:. All except the last are used as reversing-valves to change the direction ofthe flow of the gas and the products of combustion to and from the regenerators, respectively. The last valve 34 is used merely as a regulating-valve for the admission of gas from the gas main and flue to be consumed in the furnace.

The valve 30 is so placed that its bottom connection is over a flue 20, leading to one of the regenerators, and valve 31 so that its bottom connection is over flue 21, leading to the other regenerator. The side outlet of the valves opens into the flues 22 and 23, leading to the stack 24.

Valve 32 is placed with bottom connection over flue 20, which is a continuation of flue 20, and valve 33 over flue 21, which is a continuation of flue 21, and the side connection of each opens into a gas-flue 25, over which is placed the bottom outlet of valve 34:, whose side connection is into gas-box 26, which leads from gas-main 27.

The cylinder on valve 30 is hung from one end of a walking-beam 28 and that of valve 32 from the other end, so attached that when one valve is down or closed the other is up or open. The cylinders of valves 33 and 31 are similarly attached to walking-beam 29. Upon each walking-beam is a weight 36, so attached that it may be moved from one end of the walking-beam to the other by means of i the chain or rope 36, connected to the capstanwheel 37, whereby one or the other of the valves may be opened, as desired.

The connection is so made that the valves 30 and 33 will be open when valves 31 and 32 are closed, and vice versa.

Valve-cylinder 34 is so hung that by means of hand-wheel 38 and screw 39 it may be raised and lowered, thus allowing more or less 20 and 20 to one regenerator, and valve 31 is I open, allowing the products of combustion from the other regenerator to flow through flue 21 into stack-flue 23 to stack 24. Valve 33 is closed, preventing gas from going to that regenerator, and valve 30 is closed, preventing flow to the stack from this side.

To reverse the valves, the capstan-wheel 37 is turned, bringing the weights 36 to the opposite end of the walking-beams 28 and 29, causing valves 31 and 32 to close and valves 29 and 30 to open, which will make the gas flow in and products of combustion to flow out in the opposite direction.

It is to be understood that the invention is not limited to the particular means shown for reversing the valves; nor is the invention otherwise limited to the particular construction shown except as may appear from the following claims.

I/Vhat we claim as new, and desire to secure by Letters Patent, is-

1. In combination, a casing having bottom and side flue-ports, a trough surrounding the bottom port, and a water-cooled valve movable vertically into and out of said trough and having an external water seal in all positions.

2. In combination, a valve-casing open at top and having bottom and side ports and a water cooled and sealed valve movable verti cally through the top of the casing, to open or close the ports, substantially as described.

3. The combination with a valve-casing open at the top and bottom and having a side port, and water-troughs around said top and bottom openings, of a valve movable vertically in the casing and wholly removable through the top opening, and having flanges which dip into said troughs. 7

4. In combination, a port, a water-trough around the same, a side port above the trough, a valve over the trough and movable into or out of the same, and a constant water seal for the valve above the side port.

5. In combination, a casing having a bottom and aside port, a water-trough around the former and a water-trough above the latter; and a valve movable vertically in the casing over the bottom port, and having a watercooled wall Which dips into the water-trough around said bottom port and a depending flange which dips into the upper trough in both open and closed positions of the valve.

6. In combination, a valve-casing having upper and'lower water-troughs overflowing from the former to the latter, and a watercooled valve therein, arranged to be sealed in the troughs and to overflow into the upper trough.

7. The combination with a valve-casing comprising a lower section having a bottom port and a trough around the same, a middle section above the same, having a side port and a cover over thetrough, and an upper section upon said middle section and having a trough, of a vertically-movable valve in the casing, sealed in the troughs.

8. The combination with a casing open at the top and having bottom and side ports and water-troughs above and below the side port, of a water-cooled valve movable in the casing over the bottom port, and sealed in the troughs, and removable from the casing through the top opening.

9. In a regenerative valve system, the combination with a furnace-flue having two ports, and tubular valve-casings open at both ends, one end of each having one of said ports therein, and gas and stack fines in communication with the casings respectively, of two oppositely-acting exposed valves working through the other ends of the casings and controlling the said ports.

10. The combination with two vertical tubular valve-casings each of which has a furnace-port in the lower end thereof, and one of which has a gas and the other a stack port in the side thereof, of oppositely-acting valves movable vertically in the casings through the open upper ends thereof, and water-troughs around the furnace-ports and the said upper ends, in which the valves dip.

11. The combination with a pair of Verti-' verse the Valves, and means to simultaneously shift the weights.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

JAMES M. WIGHT. HARRY HYATT. VVitnesses:

JOHN A. BOMMHARDT, LOTTIE NEWBURN.

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