US1759986A - Change-over device for boiler-feed-water heaters and similar apparatus, especially applicable for locomotives - Google Patents

Description

1,759,986 -OVER DEVICE FOR BOILER FEED WATER HEATERS AND SIMILAR May 27, 1930. P. JULIUSBURGER CHANGE APPARATUS, ESPECIALLY APPLICABLE FOR LOCOMOTIVES Filed Dec. 8, 1925 2 Sheets-Sheet 0&2

aw; 2M; rdama ATTORNEYS P. JULIUSBURGER May 27, 1930. 1,759,986

SR DEVICE FOR BOILER FEED WATER HEATERS AND SIMILAR APPARATUS ESPECIALLY APPLICABLE FOR LOCOMOTIVES CHANGE *OV Filed Dec. 8, 1925 2 Sheets-Sheet 2 Patented May 27, 1930 UNITED sirArEs PATENT .i OFFICE.

PAUL JU IusBURGEn, or c HArz oTTENBURG, 13:23pm, GERMANY s'm crAnLY ariatica arin FOR LOCOMOTIVES Application filed December' 8, 1-926, Serial No. 74,211, and in Germany December 22, 19 24.

This invention relates to change-over devices for boiler feed water heaters and similar apparatus,. more especially applicable for locomotives;

Change-over devices are used in locomotive working, on the one hand, for ensuring a uniformdistribution of theboiler scale de posits, and, on. the otherhand, for increasing the scavenging action when the feed water; 10, heater-isto be freed from such deposits, of the.

precipitated boiler scale by the said scavenging action. Hitherto the change-over member, comprised a cock or valve provided with severalgpassage ways. Such cock or, valvein; its original simple form'has the disadvantage that it is very difficult to-operate, as the-cock, or valve plug has to bepressed; withv con siderable force. into the casing. in order to form tight joints between the several cham-v 20, bers, involved and exposed to different pressures and the atmosphere, so that opposing frictional resistance to the rotation to the plug has to be overcome and this canonly be effected with considerable difliculty. In an 25 endeavour. to eliminate these drawbacks either the plug ismade of a cylindrical shape, which renders it impossible to obtain-a perfectly'tight'joint on allsides, or separate de-' vices, have to be used for lifting the cook pl'ugbefore rotating it, and for firmly forcing it backagain into its joint tight position in the casing after the rotation has been effected. Thesellifting devices are also difficult to operate as it is necessary to overcome considerable. frictional resistances due to the screwlifting means, as the screw threadsv are of fairly large. diameter, and therefore. they have to. be'provid'ed with large hand wheels or levers for rotating them, The capacity of a change-over cook or valve however .is narrowly limited. for technical and economic reasons, as according'to the quantities of water that can be handled by the cock or valve in a unit of time, so is the cross sectional areas'of passages, in the cook or valve plug, and the total dimensions and weight of the cock or valve, the latter increasingin such a manner that in the larger sizes, the operation is practically impossible by hand while the fitting thereof is rendered extremely. 'diflicult.

teriallyincreasing the Under. these circumstances the use of comparatively large change-over devices is of doubtful value. T a .According to. this invention, these disadvantages are eliminated by replaclng'thefrice tionally fitted cocks or valves by a set of valves which are capable. of being moved without the. use of abnormal pressure or force, since therefis but little, .if'any, friction to. be overcome. By this means the cross sectional" areasuof passages? can be increased within; wide limits, and apparatus of any desiredcapacity can be used 'without ma dimensions and. weights, the change-over device to. this. end comprising two double-seated: valves mounted'in the. feed pipe leading, on the one hand, from the pump to the. feed water-heat er, and on the other hand, from the-feedwater heater to the boiler, the two doubleseated valves'being soarranged in relation to each other that one of the two shut-off .posi tions of theone valvev always. correspondson. each occasion to a definite' closing 'position of the, other valve it i being immaterial, whether the co-ordinated positions. are ate tai'ned simultaneously or successively. The valves are capable of'being' arranged. inde- V pendent of each other or may be coupled to each other, and they may be operated by' hand or by power or may be controlled by a" pressure, medium.

In order that the said invention may be clearly understood and readily carried into: efiect, the same will'now be fully described with reference tothe accompanying drawings, in which severalconstructions. of the change-over device are diagrammatically illustrated by way ofexample. In these draw- 1ngs Figure 1 shows in part sectional elevation a construction of a change-over device; con-i nected to a locomotive boilerand pump, by. connections diagrammaticallyillustrated,the device having two valves which are in axial alignment and are movable in the same axial direction and capable ofbeing collectively operated. V

Figure 2shows a modification of the construction shown in Figure l, withi axially aligned valves adapted to be moved in oppositedirections. Figure 3 shows a further modification of the construction illustrated in Figure 1, the .two valve axes being disposed parallel to each other and capable of being controlled, through the medium of one and the same spindle, and onlya part of thevboiler being shown. I

ot the con- Figure 4 showsa modification struction shown in Figure'3.- 7

Throughout thedrawin s, the feed water a and 6, while P designates the connection or branch for the ,pipe connecting the pump I p to the change over device, while a conduit 1 013 3 ofthe latter leads to the feed water heat- I en .V.,fand K the connection orbranch of the I change over device for the pipe connecting the boiler 70, to the;-device,the'latter being. conheaterV. I V

" Inthe construction of the device shown in Figured, where the valves are in the positions shown therein, the feed water delivered nected by'aconduit 3 or 4 to the feed water by the pump through the connection P, passes through the conduit 1 and the feed water heat or connection branch 2 into the heater V,

V traverses'the latter in theupward direction, 7 is given during that time the desired increase ,1 of temperature'andescapes from it through the branch 3, tothe valve 1), which is set for a the delivery of the water to the outlet branch 'K of the pipe leading to theboiler. @If, for

the purpose of scavenging the feed water a heater, the direction of flow is to be reversed,

the valves a and. b are moved collectively to theleft, either by hand or by means of the pressure medium cylinder D. The feed water coming through the branch P from the pump 7 r I 40 then passes through the'branch 3 into the heater, traversesiit in the direction opposite to that previously mentioned, that is to say, in

the downward direction, and'escapes from it through the branch 2 to the conduit 4 and the valve '5, at this moment opened for this direction'of flow, into the boiler.

In the construction of change-over device valve 6 .to the left, the latter closes thejcon- 'duit" 4, and the former closes the conduit 5, while the feed water then passes through-the conduit 1, through the branch-2 into the heater and escapes from the latter vthrou'gh the branch 3 to the boilerithrough a' branch conduit-:59, specially provided for. this posi- 1 the c'onstructionshown. inlF-igure 3, the

valveswa andb areoperated byzhand-ri'Ther I with'the conduit 5.

valve spindles are suspended from a balance or equalizing lever 0 which is pivoted to the hand operated screw spindle d, in order to ensure a uniform closing of the valves. In the valve position shown," the feed water passes through the conduit 1, branch 2, into the heater, traverses the latterand escapes (from it to the branch 3 whence it passes to the 1 conduit 5 andthe adjoining chambers to the branch K, and then to' the boiler. WVhen the two valves are screwed upwards, the water 7 will pass from the branch Pthrough the con du'it 5 and the'connection 3 into the heater,

connection1K leading to the boiler.-

The construction iniFigure 4 is-similar to" which it traverses now in the opposite direction, toand through the conduit-4 into the" that of Figure 3, with the exception that the t 7 position of the conduits is slightly different and somewhat similar to that shown 111 Figure 2, and the branch conduit 5*" is provided and commences at the conduit 5, to enable the feed water escaping from the heater through the branch'3 to pass the valve I) and into the conduit K leading to the boiler. In the position of the valves shown in Figure 4, the

water passes from the branch P'through the 'conduit'5,'connection 3, into the heater, es-

capes from the same into the branch2 from i which it passes to and through theconduit 4 and is diverted by the lifted valve 6 into the v I branch or connection K.- WVhen the valves are screwed down, the water comlng'from the branch P is delivered throughthe conduit 1 andbran'ch'2 to the heater, which it traverses in thejreverse direction andescapes therefrom throughthefbranch 3and passes to the branch'or, connection K by way of the branch conduit 5? and valve b. V I

The change-over cocks mentioned in t'he opening portion hereof, the" drawbacks of which are eliminated bycthe invention hereinbefore described,-have as a ru1e,'in addition to'the two change-over positions in which the water is conveyed in different or opposite directions through the heater, also a switched out or inoperativeposition in which the water ios isdelivered from the pump directly to the boiler, the heater being completely shut-oil" from the delivery pipe. The change-over de-' vices according to this invention, in as far as they havebeen hereinbefore described, do not ovide 'this possibility ofshutting-off or switching out the heater. 'However the improved change-over valve shown in Figure 2 is adapted for switching out the heater by mov ing the valve 7) to the left from the position shown in Figure 2. This will have the effeet of placing the conduit 5 into communication with the outlet K thereby permitting the inlet P to communicate with the latter throughthe conduit 5 arranged in connection In a similar manner the change-over valves. shown inthe other fig ures of the. drawings {can be converted into combined change-over and switching out devices by so arrangmg the mechanisms connecting the double seated valves as to render them independent instead of inter-dependent of each other and thereby enable the movement of one valve to be ellected independently of the other valve. If, for instance, the valves (1 and b shownin Figure 1' are adapted to be'operated independently and the valv s I) remain in the right hand position as sh '1 Figure l, and the valve a moved as laid hand position such as shown in Figure 2, then the inlet connection P would be in communication with the outlet connection K by the conduit and the feed water heater connection 2 would beshut oil from the inlet branch P as well as from the outlet branch K, and the water Will'flow from the pump through the inlet branch P and the conduit 5 to the boiler or outlet connection or branch K. The feed Water connection 3 however will, on the contrary, be open, that is to say, the heater will only be switched out of the water circuit-,there being no need for O the water to pass through the heater in its able independently of the other or of each other, for instance, by means of a screw threaded nut and spindle, relatively to the point of suspension ofthe balance lever, and to lock the balance lever in itsposition before moving the 'valve spindle. The valve which does not take part in the axial or ver- L tical movement must remainpressed against its lower seat, and the oscillatory movement of the balance lever during-the axial adjustment of the other valve inustbe prevented, otherwise the operative mechanism becomes an inoperative structure for effecting the movement of one valve and not the other. To this end. the valve a in Figure 3 is lifted whilst the valve Z) remains on its bottom seat.

in order to shut off the feed Water heater con nection 2 from the branches or connections P and K. By thus arranging the valves the water will pass from the branch or connection P through the conduit 5 to the branch or connection K. By closing the member Z in the heater connection 3, the heater Will beswitched off completely from the conduit 5 exactly as in Figures 1 and 2. In a similar manner to that described with reference to Figure 3, the valves a and b s hewn inFigure 4. can be independently operated and therefore furs ther description thereof as regards Figure :4 is considered unnecessary. T

WhatI claim and desire to secure by Letters Patent of the United States is 1. In combination, a boiler feed water heater and a change-over device, the latterv water to a boiler, and piping connecting the outlet conduit to the opposite. ends of the heater, the piping and valves being arranged for the alternate delivery or water to the opposite ends of the heater and from the said opposite ends to the outlet and for the alternate flow of water in opposite directions through the heater. v

2. In combination, a boiler feed water heater and a change-over device, the latter comprising an inlet capable of receiving water from a feed pump, piping connected to the inlet and having branches communicating withv opposite ends of the heater, an inlet valve controlling the branches for the alter: nate passage of water from the piping connected to the inlet to the opposite ends of the heater, an outlet connected to a boiler for delivering water thereto fromthe heater, piping connected to the. outlet and having branches connected to the opposite ends of theheater and an outlet valve controlling the outlet, the inlet and outlet valves being associated for the alternate flow of water in opposite directions through the heater and; the alternate passage of waterfrom the opposite ends of the heater to the outlet.

3. In combination, a boiler feed Water heatthe alternate flow ofwater from the'opposite ends of the heater, to the outlet conduit, the inlet and outlet valves alsocontrolling the alternate flow of water throughthe heater in opposite directions. 3 I I 1 4:. In combination, a boiler feed water heater and a change-over device, the latter comprising an inlet. conduit capable of receiving water; from aifeed pump, piping connected to the inlet conduit andto theopposite ends or" the heater, an inlet valve controlling the alternate flow of water to the opposite ends of the heater, an outlet conduit capable of delivering water to a boiler,v piping connected to the outlet conduit and to the opposite ends of the heater, an outlet valve controlling the alternate fiow of water to the opposite ends alternate flow of water from the opposite ends of the heater to the outlet conduit, and

means for simultaneously and collectively operatingthe inlet and outlet valves for cone trolling the alternate flow of waterthrough the heater in opposite directions.

5. In combination, a boiler feed Water heater and a change-over device, the latter comprising an inlet conduit capable of receiving water from a feed pump, piping connected to the inletconduit and to theopposite ends of the heater, aninlet valve controlling the alternate fiow' of water to the opposite ends of the heater, an outlet conduit capable of delivering waterto' a boiler, piping connected to the outlet conduit and to the opposite ends of'theheater, an outlet valve controllingthe alternate flow of water from the opposite ends of the heater to the outlet condu t, and means for simultaneously and collectively operating the inlet and outlet valves in the same direction for controlling the alternate flow ofwater through the heater in V opposite directions.

6; In combination,a boiler feed water heater and a change-over device, the latter com prising an inlet conduit capable of receiving water from afeed pump, piping connected "tothe inlet conduit and to the opposite ends of the heaterfan inlet'valve controlling the ofthe heater, an outlet conduit capable of delivering water to a boiler, pipingconnected to the outlet conduit and to the opposite ends of the heater, van outlet valve controllingthe alternate flow of water from the opit posite ends of the heater to the'outlet conduit, means forsimultaneously and collecit 'tively operating the inlet and outlet valves for controlling the alternate flow of water through the heater in opposite directions, a

branch conduit connectingthe heater to the iping, and a closing member in the said ranch for preventing the flow of water through the heater. n

7. In combination, a boiler feed water heaterand a changeover device, the latter'comprising an inlet conduit capable of receiving water fromja. feed pump, piping connected to the inlet conduit and to the opposite ends of the heater, an -inlet valve controlling the alternate flow of 'waterto the opposite ends of the heater, an outlet conduit capableof delivering water to a boiler, pipingconnected to the outlet conduit and to the opposite ends of theheater, an outlet valve controlling the alternate'flow of water from the opposite ends of'theheater to the outlet conduit, spindles attached to the valves,ja balance lever to which the spindles are pivotally attached and means for moving thelever.

8. In combination, aboiler feed water heaterand a change-over device, the latter comprising an inlet conduit capable of receiving water from a feed pump, piping connectedto the inlet'conduiti and to the opposite ends'of the heater, an inlet valve controlling the alternate-flow of water to the opposite ends of the-heater,"an outlet conduit capable of delivering water to a boiler, piping connected tothe outlet conduit e and to the opposite ends ofthe heater, an outlet valve controlling the alternate flow of water from the opposite ends of the heater to the outlet conduit, spindles attached to the valves, a balance lever to Which the spindles feed water ends of the heater, an outlet conduit capable of delivering water to a boiler, piping connected to the outlet conduit and to the oppositerends of the heater, an outlet valve controlling the alternate flow of water fromt j the opposite" ends of the heater to the outlet conduit, spindles attached'to the valves, a balancelever to which the spindles are pivotally attached, means for moving the lever, and mechanism on at least one of the spindles for adjusting the position of the valve con nected therewith relatively to the balance lever. Y

10. In combination, a' boiler, feed water heater and a change-over device, the latter comprising an inlet conduit capable of receiving water from a feedpump, piping con nected to the inlet conduit andto the opposite ends ofthe heater, an inlet valve controlling the alternate flow of water to the'opposite: ends of the heater,an'outlet conduit capable of delivering Water to a boiler, piping connected to the outlet conduit and to the opposite ends of the heater, an outlet valve controllingthe alternate flow of water from the opposite ends ofthe heater to the outlet conduit, spindles attached to thevalv'es, a balance lever to which the spindles are pivotally attached, means for moving the lover, a.

branch conduit connecting the heater to the p1ping,a closing member inthe said branch I for preventing the flow ofwater through the heater, and mechanism on at least one of the spindles for adjusting the position of the valve connected therewith relatively to the balance lever. V

11. In combination, a'feed water heaterrangements of piping connecting each end of the heater to both conduits, and valves in the conduits controlling the alternate passage V anda change-over device, the lattercomprismg an lnlet conduit, an outlet conduit, arg a of Water to the respective ends of the heater and the alternate passage of Water from the opposite ends of the heater to the outlet conduit.

12. In combination, a boiler feed Water heater and a change-over device, the latter comprising an inlet conduit, an outlet conduit, piping for transmitting Water from the inlet conduit to both ends of the heater and for transmitting the Water from both. ends of. the heater to the outlet conduit, and valves in the inlet and outlet conduits, controlling the alternate How of the Water to both ends of the heater, the alternate flow of Water through the heater in opposite directions and the alternate flow of Water from the opposite ends of the heater to the outlet conduit. i

PAUL J ULIUSBURGER.

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