US1275609A - Reversing-valve. - Google Patents

Description

n, E. SCHILD'. aEvERsiN v-ALvE'.

APPLICATION FILED MAR. l5. 1918.

Patented Aug.' 13, 1918.

' iNvNTQR WMZ W UNITED srnrns PATENT crearon REvnRsING-vnnvn.

specificaties or Letters Patent. e Patented Aug. i3, 1918.

Application' filed MarchV 15, 1918. Serial No. 222379.

ATo all 'whom t may concern.'

Be' it known that I, HERMA-NN E. SCHILD, a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented `a new and useful Improvement in Reversing-Valves, of which the following. is a specification.

This invention relates to reversing. valves for regenerating and similar furnaces, such as Siemens open hearth furnaces, and Vsimilar types of refining and heating furnaces. The object of the invention is to provide a valve for reversing either thel air or gas of such furnaces, which ,is of simple construction, easy to operate, and which when used for reversing thegas prevents wasting the gas and avoids danger of explosions, and to provide a valve which is especially adapted for gas and air ports opening from below so as to avoid overhead conduits.

As is well known, regenerating. furnaces are provided with four regenerators or heating chambers for the air and gas, two for the air'a-nd two for the gas. Each of these chambers is filled with lire brick or other refractory material known as checker workY tain time it is necessary to reversethe course.

of the air and gas, so that the same will then enter through the newly heated re-` generator chambers, and thence to the fu-rnacech'amber while the waste products of combustion pass out through the regenera tors irstfused, thus reheati-ng the'same, and so on alternately.

Various forms of valves have .heretofore v i been provided and suggested for reversing the air and gas, such `as buttery YVvalves and domeeshaped valves mounted either to .re-kv ciprocate or oscillate.` All'pri'or forms of valveshave, however,` been somewhaty com'- plicated and difhcu'lt to repair or inspect,

and most of them have also been so constructed that they are' not adapted to ports opening from below and also s o that when reversing there was more or less. wastagey of gas.

Theobj ect of my invention is "to provide a reversingV valve of simple construction and which is particularly adapted for hues opening from below. The invention comprises a valve mechanism constructed and operating as hereinafter described and claimed.

In the accompanying drawings:

Figure l is avertical longitudinal section of the improved valve adapted for reversing the gas to a regenerating furnace; Fig'. 2 is a plan view of the valve seats and show: ing` diagramma-tically the checker chambers and connecting fines; and Fig. 3 is a plan view of the valve and its operatingv mecha-Y` nism;

In the drawings, the reference numerals l, la, indicate diagrammatlcally the checker chambers for the gas and 2 and 2a4 theV checker chambers for the ai-r. rlhe chambers 1,1a are connected by passages 3 and' 3a to gas ports 4f and le in the valve seats 5 and 5, while the air chambers 2 and 2a 'are' connected by passa-ges@ and 6a to ports 7 and 7a'in a valve' seat 8. In the valve seats -5 and 5.a are a .pair of gas ports 9 and 9% connected respectively to the gas mains l0 and'lO', and also a pair of ports 1l and lla connected by passages l2l and 12a t`o the stack, not shown. The valve seat 8 is likewise provided-.with a port 13 connected by passage lllY to the` stack. All of the valve seats named are flat and same from below.

9o horizontal and the ports enter through the The gas reversing-'valve comprises a pair of members formed with hat bottom Vfaces fitting and sliding on the seatsv and 5,v

and which members are in the form of water pans 15, 1 51 Vwhich are offsuicient length to cover all ofthe three ports Viuftheva-lye seats i-n all operative positionsgnf theV f valve.

dome-shaped valve member l',v 16?, prefer- Each of the water pansy carries .a-

ably lined V with refractory material and with the edges thereof dipping below the'-l surface of the water in the pans 15.,.15a`ar'1dwhich' dome-s`haped members, are provided:

with chambers or passages 17,1 l?? for` directin@` the gas and products of combustion in the manner hereinafter described.

The valve described has a simple rectilinear reciprocating movement on the valve seats 5 and 5a. ln one ot' the positions (shown in Fig. 1f) one or the dome-shaped members 16 is in position to connect gas port 9 with checker port e, thus directing the gas into checker chamber 1, with the left hand end of the water pan 15 covering the stack port 11, while the other domeshaped member 16a connects the checker port la with the stack port 11a, with the left hand extension of the water pan 15 covering the gas port 9a. Consequently the gas now enters through the checker chainber 1 to be heated therein, and thence goes to the furnace chamber, while the products of combustion pass through checker chamber 1a and through the valve member 16a and thence to the stack.r To reverse the gas the valve is merely moved toward the left, so that the dome-shaped member 16 then connects checker port e with stack port 11, while the right hand extension of the pan 15a covers the stack port 11a. l

Any suitable mechanism may be used for reversing the positions of the two valve members in unison. As shown the two pans 15 and 15a are connected by a bar 20 which is toothed so as to form a rack, which is engaged by a pinion 21 on a shaft 22 driven from any suitable source, such as by an electric motor 23, Any other motor, however, may be used, or, if desired, a double acting hydraulic cylinder may be used for reciprocating the valve.

An exactly similar valve mechanism may be used for reversing the air from either port 7 or 7 to the checker chambers and to the stack, except such valve need have only a single dome-shaped member and the water pan need not be extended so as to cover the third port.

The valve mechanism described is very simple and requires a minimum amount of power for reversing. lt is admirably adapted to ports opening Jfrom below. The valve seats are perfectly flat and the sliding valve members thereon have corresponding flat under surfaces so that there is little danger of leakage of the gas between the valve seat and the valve, and the water cooling of the valve prevents warping and burning out of the valve itself. All of the parts are exposed so that they can readily be inspected and also so that they can be readily gotten at for repair, when necessary.

1. In a reversing valve mechanism, the combination of a horizontal valve seat pro-v vided with three ports opening from below,

a slidin valve co )eratinff with said seat and comprising a dome arranged to connect two of said ports in each position, a water pan carrying said dome, and mechanism :tor reciprocating said valve. y

2. In reversing valve mechanism, the combination of a horizontal valve seat provided with three ports opening from underneath, a sliding valve comprising a water pan mounted toreciprocate on said seat and carrying a 'dome arranged to connect two of said ports in each position o1 the valve, said water pan projecting in both directions from said dome, whereby said projecting ends cover the third port in either position of the valve, and mechanism for reciprocating said valve.

3. In reversing Valve mechanism, the combination of two horizontal valve seats each provided with a gas, a regenerator, and a stack port all opening from underneath, a member reciprocally mounted on each of said seats, and including a dome-shaped member, and connections between said reciprocating members, all arranged so that in one position of the valve one of said domeshaped members connects a gas port with a regenerator port and closes the stack port, and the other thereof connects a regenerator port with the stack port and closes the gas port, and mechanism for reciprocating said members.

4. In reversing valve mechanism, the combination of a pair of horizontal valve seats each provided with a gas, a regenerator, and a stack port opening from underneath, a plate mounted to reciprocate on each of said valve seats and each carrying a domeshaped member each of which serves to connect two of the ports of the valve seat, said plates being of; such length as to cover the third port in'each position of the valve, connections between said plates for reciprocating them in unison, and mechanism for reciprocating said valve.l

5. In reversing valve mechanism, the combination of two horizontal valve seats each provided with a gas, a regenerator, and a stack port, all opening from underneath, a water pan mounted to reciprocate on each of said valve seats and of a length suiiicient to cover all three of said ports in all positions of the valve, a dome-shaped member carried by each of said water pans and arranged in one position of the valve to connect the central port and one end port of each seat,'and inthe opposite position to connect the central port and the other end port of each seat, and 'connections and mechanism for reciprocating said pans simultaneously.. j i

'6. lnreversing valve mechanism, the combination or" two horizontal valve seats each provided with a gas, a regenerator, anda stack port, all openingfrom underneath, a plate mounted to reciprocatefon each of said seats and of ay length sulicient to oover all of each seat and in its opposite position to three ports 1n all operative positions, conconneot the central port with the other end 10 neotions between said plates whereby they port of each Seat.

move in unison, reciprocating mechanism op- In testimony whereof I have hereuntol set 5 eratively connected to said plates, and memmy hand.

bers Carried by each plate and forming a HERMANN E. SCHILD.

conduit arranged in one position to connect Witness:

the central port with one of the end ports G. H. LERESCHE.

Copie) of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

Washington, D. G.

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