US698283A - Reversing-valve for regenerative gas-furnaces. - Google Patents

Description

No. 698,283. Patantad Apr. 22, I902.

H. HYATT & McGEORGE.

REVERSING VALVE FOB REGENERATIVE GAS FURNACES.

(Application filed Dec. 19, 1900.)

(No Model. 2 Sheets-Shae; I.

No. 698,283. Patented Apr. 22, 1902.-

H. HYATT & J. men-zones.

REVERSING VALVEFOB REGENERATIVE GAS FURNACES.

. (Appliqation filed Dec. 19, 1900.;

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* UNITED "STAT-Es PA ENT- OFFICE.

HARRY HYATT AND JOHN MOGEORGEOF CLEVELAND, OHIO, ASSIGNORS TO THE WELLMAN SEAVER ENGINEERING COMPANY, OF CLEVELAND,

OHIO, A CORPORATION OF OHIO.

REVERSlNG-VALVE FO'RAREGEINQERATYIVE GAS-FURNACES.

SPECIFICATION forming-part of Least. Patent No.'69 8,283, dated April 22 1902. Application filed December 19,1900. Serial No. 40,376 (No model.)

To all whom it may mm.- Be it known that we,-HARRY HyArrand JOHN MCGEORGE, citizens of. the T United. 1 States, and residents of Cleveland,.Ohio,' have '5 invented certain Improvements in Reversing- Valves for Regenerative Gas-Furnaces, of which the following is a specification.

The object of our invention is to: provide a simple and effective .form of reversing-valve to for use in connection with regenerative furnacesin which gases of very high'tempera ture are employed, the improved valve having been devised with especial reference to properly resisting the destructive effect of '15 such highly-heated gases.

In the accompanying drawings, Figure 1 is a vertical sectional view of part of the flue structure of a regenerative furnace, showing, our improved valve applied thereto. Fig. 2

is a plan view of the flue end structure to.

which the valve is adapted. Fig. 3 is an in-: verted plan view of the valve. ,Fig. 4 is a view, partly in elevation and partly in ver-' tical section, on the line a a, Fig. 1; and Fig.

2 5 5 is a diagram illustrative of the construction of the automatic valve-turning device form v ing part of our invention.

In Fig. 2 of the drawings, 1 represents'a.

flue communicating with one regenerator,i2

a flue communicating with another regeneraj tor, and 3 and 4 flues to be connected tothe regenerators alternately-for instance, flue 3 may be a flue for supplying gas, air, or products of combustion to the regenerators, and

, '5 flue 4 may be a flue for conveying gas, air,

I 'standlthe destructive effect of the highlythe regenerator communicating with the flue 2; 7 but if the'bell is turned one-quarter way around, so that its' passage .5 provides communicationbetweenthe ports 1' and 4t and its passage". 6 provides communication betweenthe ports 2? and 3, the conditions Will be reversed, the inlet-flow being now directed to the regenerator communicating with the flue2 and the outlet-flow being from the regenerator communicating with the flue 1, the original conditions beingrestored byturning the valve either backward or forward again to the extent of a quarteraturn.

The flue-ports are surrounded and sepa- 1 rated by a water-seal chamber '7, terminating in a deeper circular pitB, and the under side of the bell has a depending outer annular flange 9 for entering the circular pit 8 and other and shallower transverse flanges 1O surroundingthe flue-ports and adapted to the sealing-chamber 7, so as to prevent leakage beneath the valve from one passage of the same to the other.

We so construct the valve that it can be completely lined with fire-brick or other refractory material, and thus enabled to withheated gases employed in modern metallurgical furnaces.

Thesheet metal casing 11 of the valve is preferably in the form of a semicylinder, and to the edge of this casing on the open side of the semicylinder are secured the bottom plates 12 of the valve, which serve the double purpose of carrying the sealing- flanges 9 and 10 and forming lcdgesfor the support of the fire-brick lining13, transverse partition 14, and arched blocks 15 of the valve. All of the portions of the valve which come into contact with the heated gases are thus composed of fire-brick or other refractory material capable of resistingthedestructiveeffect of said gases, all of the metallic portions of the bell being effectivelyprotected from the heat.

In order to effect the manipulation of the bell, we prefer to suspend the same by means of a frame 16 from the piston 17 of a powercylinder 18, mounted upon a suitable framework 19 above the bell, so that when it is desired to reverse the valve the same can be lifted-until its depending flanges 10 are free from the sealing-chamber and can then be partially turned and again lowered after it has reached its new position, the deep annular sealing-flange 9 remaining partially immersed, so as to prevent the complete unsealing of the valve during the reversing operation, and the annular form of the flange and sealing-pit restricting the latter to the smallest possible dimensions.

W'e prefer to effect the partial rotation of the valve automatically as it is raised and lowered and for this purpose employ a rod 20 and the cylindrical casing 21. This casing has in its sides four vertical grooves or slots 25, the top of each of these being connected to the bottom of the next adjacent by an inclined groove 22, there thus being formed around the interior of the casing a continuous groove. A pin 24:, projecting laterally from the rod 20, enters and slides in this groove, there being pivoted spring-pieces 23 placed therein and acting as pawls to insure a forward revolution of the rod 20 each time the bell is raised.

In operation when the bell is moved upwardly the pin 24 is made to follow the inclined groove 22 and as a result causes the rod 20, with the attached parts, to make a quarter-revolution. As the bell is lowered the pin follows the vertical groove 25 to the bottom thereof, the pin being guided into said groove by the switch or ratchet and is now ready to enter the next inclined groove, when the bell is again raised.

Having thus described our invention, we claim and desire to secure by Letters Pat- 1. A reversing-valve for regenerative gasfurnaces consisting of a box-like casing, a lining of refractory material for said casing, a transverse partition dividing the easing into two chambers, and blocks extending from one side of the casing to the partition, saidpartition together with the blocks and refractory lining being supported on plates extending along the edges and across the bottom of the casing, substantially as described.

2. A box-like casing having its lower side open,a horizontal plate fixed to the lower edge of the casing extending on both sides of the lines of the walls of the casing, and a refractory lining for the casing carried on the inwardly-projecting part of said plate, the outwardly-extending portion of the plate having a downwardly-extending annular flange outside the lines of the walls of the casing, substantially as specified.

3. A reversing-valve for regenerative gasfurnaces consisting of a semicylindrical casing having a partition dividing it into two chambers and open on its lower face, the edges of the openings of the chambers in said face having downwardly-projecting flanges, and a plate extending around the outside of the casing also having a downwardly-projecting flange, said flange extending downwardly to a greater length than the first-mentioned flange, substantially as specified.

4. A reversing-valve for regenerative gasfurnaces consisting of a casing divided by a transverse partition into two chambers, said chambers being open on their lower face, the edges of each opening being surrounded by a downwardly-proj ecting flange, a plate extendin g in an approximately horizontal plane and fixed to the lower portion of the casing, said plate also having a downwardly-projecting flange outside of the first flange, said second flange being circular in form and projecting down to a level below the lower edge of the first flange, substantially as specified.

5. The combination of a flue structure for regenerative gas-furnaces provided with four flue-openings, a sealing-pit surrounding said openings and extending between the same, a reversing-valve having a transverse partition dividing it into two chambers open on their lower face, with downwardly-projecting flanges extending around said openings, and a plate fixed to the valve having a second flange extending around the casing, said flanges being constructed to enter the said sealing-pit, substantially as specified.

6. The combination of a flue structure having four flues opening into it, a sealing-pit extending around said flue-openings,andsealing-pits of relatively less depth extending around each flue-opening, with a reversingvalve provided with two chambers open on their lower face, the openings from said chambers being provided with downwardly-projecting flanges constructed to enter 'the shallow sealing-pits and a plate extending around the valve provided with a downwardly-extending flange of greater length than those surrounding the openings of the chambers, said flange being constructed to enter the outer sealingpit, substantially as specified.

7. A reversing-valve for regenerative gasfurnaces, the same consisting of a casing, a framework for said casing, means on the framework connected to the casing for raising the same and a cylinder also carried on the casing having grooves in its interior and a pin on the means connecting the raising means with the casing, constructed to engage said grooves, whereby the casing is given a partial revolution as it is raised or lowered, together with means for causing the pin to traverse the grooves in but a single direction substantially as specified.

8. A reversing-valve for regenerative gasfurnaces, the same consisting of a casing, a framework for the same, supporting means for raising said casing at will, a rod connecting the casing to the said means, two members consisting of a pin and a body having grooves, one of said members being attached to said rod and the other member being carried bythe framework and engaging the first member, said members serving to partially revolve the casing as it is raised or lowered,

together with means for causing the pin to move through the groove in a constant direction, substantially as described.

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

HARRY HYATT. JOHN MOGEORGE.

Witnesses:

O. W. OoMs'rooK, r HERBERT P. GLIDDEN.

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