US2278313A - Valve - Google Patents

Description

March 31, 1942. 1 HoRNBOsTEL 2,278,313

lVALVE A Filed 0.613. 23, 1940 2 Sheets-Sheet l March 3l, 1942. L. HoRNBos-rsl. 2,278,313

y VALVE Filed ocx. 25, `1940 2 sheets-sheet 2 43 a 4Z- y I EEB/44 Patented Mar. 31, 1942 VALVE `Lloyd Hornbostel, Beloit, Wis., assignor to Beloit Iron Works, Beloit, Wis., a corporation of Wisconsin Application October 23, 1940, Serial No. $162,361

6 claims'. (cl. 251-8) f i 'Ihis invention relates to a valve especially adapted for controlling the flow of liquid suspensions in conduits Without creating eddy currents, pockets and the like when partially closed to throttle the owing suspension material. n

More specically the invention relates to a throttling valve for controlling streams of paper stock, white water and the like suspensions Without forming pockets or dead areas where lumps of fibers can collect, and Without setting up a churning action in the streams.

While the invention will hereinafter be described in connection with valves for controlling flowing streams of paper stock, white water and vthe like suspensions which -Inust be handled in a paper mill, it should be understood that the valves of this invention are not limited for such use and are capable of controlling the ow of any uid.

The conventional valves that have been used in stock and white Water conduits have been either of the movable plug type or gate type. These valves are objectionable because, when partially closed, they form pockets in the flowing stream where lumps of stock can collect. In addition, these types of valves set up a churning action in the conduit in back of the valve which renders it Very diicult to obtain even distribution of the flowing material in branch pipes located after the valve.

It is highly important that stock flowing through conduits to a paper machine be positively controlled or throttledto any desired extent without the formation of pockets in the flowing stream and without the setting up of a churning action in the stream. It is also very vimportant that the throttled stock flow evenly to various branch lines in the conduit so as t 0btain even distribution of stock in all branches.

These problems occur in many places in a paper mill, such as, for example, in the stock line going to two or more pulp screens, and in the conduit direct from the stock fan pump to the head box of the paper machine.

The valves of this invention eliminate the formation of any pockets or dead areas'in the conduits in which they are mounted and maintain a uniform type of flow in these conduitsl even when partially closed to cause a throttling effect. Branch pipes leading from the conduits containing a Valve of this invention will receive equal amounts of stock and even distribution through the branch pipes will be maintained.

The valves of this invention include a streamlined central member xed in the center of a flowing stream so that the flowing material will surround the member without creating eddy currents, dead spaces or the like disturbances. The xed member is encased in a slidable shell which can be shifted longitudinally to move a portion thereof toward and away from the xed member, thereby decreasing or increasing the capacity of the passageway around the fixed member. The variation ofthe size of the passageway creates a throttling action on they flowing stream and the kstream flow can be stopped entirely by moving the shell 'into seating'engagement on the fixed member.

It is, then, an object of this invention to provide a valve for controlling flowing streams `of solids in liquid suspensions without effecting disturbances in the flowing streams.

A further object of this invention is to provide a throttling valve adapted for controlling iiowing streams of paper stock Without permitting the collection of lumps of stock bers.

A further object of the' invention is to provide a valve wherein the valve housing or casing is longitudinally shiftable to control the valve setting.

Another specic object of this invention is to' provide a throttling Valve having a streamlined or tear-drop shaped xed member and a longitudinally shiftable shell member movable toward and away from the fixed member.

Other and further objects of this invention will be apparent to those skilled in the art from the following detailed descriptions of the annexed sheets of drawings which disclose preferred embodiments of the invention.

On the drawings:

Figure 1 is a side elevational view of a valve according to this invention mounted for use between opposed conduits of a pipe line.

Figure 2 is a longitudinal vertical cross-sectional view taken along the line II-II of Figure l.

Figure 3 is a transverse vertical cross-sectional view taken along lthe line III-III of Figure 2.

Figure 4 is a fragmentary side elevational view of a modified form of valve construction according to this invention.

Figure 5 is a longitudinal vertical cross-sectional view taken along the line V-V of Figure 4 and also illustrating a portion of the valve construction omitted from Figure 4.

As vshown on the drawings:

In Figures 1 to 3 inclusive the reference numeral I0 designates generally a valve according to this invention mounted between spaced opposed conduits or pipes I I having outturned flanges I2.

A hollow cylindrical end piece I3 of the valve I has an outturned flange I4 bolted to the flange I2 of the adjacent conduit II. A similar hollow cylindrical end portion I5 is provided at the other end of the valve. This cylindrical piece I 5, however, has a circumferential groove I B near its outer end receiving the tongue I1 formed on the end flange I8 of a split collar I9. The end ange I8 is bolted to the ilange I2 of the adjacent conduit II. collar I9 is split as at 29 and is provided with outturned flanges 2| which are drawn together by bolts as shown.

The flange I8 of the collar I9 holds the main body of the collar in spaced relation from the end piece I5. This main body portion of the collar is internally threaded as at 22 (Figure 2).

'I'he end pieces I3 and I5 are connected through ns 23 and 24 respectively to a hollow Ytear-drop shaped plug 25 as best shown in Figure 2.

Actually the cylindrical end pieces I3 and I5, the ns 23 and 24, and the plug 25 can be considered as one unit with the plug member 25 disposed in a stream flowing between the conduits II and with the ns permitting free passage of the stream. This one-piece structure is secured to the conduits II and ts between the outturned flanges I2 of the conduits.

The plug 25 has a raised annular seat portion 26 on the leading end thereof at a point substantially in line with the end piece I5.

A spherical shaped shell or housing 39 encases` the plug 25 and has cylindrical hollow end portions 3I and 32 slidab-ly mounted on the end pieces I3 and I5 respectively. The end portion 3| has an offset rim 33 providing a recess 34 for a packing ring 35. held in the recess 34 by a ring 33 bolted to the rim 33 and adapted to project into the recess 34 for compressing the packing 35.

The cylindrical end portion 32 of the shell 30 has an oiset rim 31 which is externally threaded at r38 into the collar I9. This offset rim 31, like the rim 33, provides a recess 33 for a packing ring 4D. The packing ring 49 is held in the recess by a metal ring 4I bolted to the rim 31 and adjustable to compress the packing.

The shell 39 has a plurality of solid spokes 42 and hollow spokes 43 radiating from the central portion thereof as shown in Figures 2 and 3. An annular rim 44 circumscribes the spokes and is apertured at each hollow spoke 43 so thatl a lever bar 45 can be inserted into ahollow spoke if desired.

An annular seat 46 is formed on the interior of the casing at the inner end of the cylindrical portion 32 thereof as shown in Figure 2.

From the above descriptions it will be understood that the internally threaded collar I9 is secured on the flange I2 of a xed conduit II. The casing 39 has a threaded rim portion 31 ,on one end thereof threaded into the collar I9.

Therefore, when the casing 39 is rotated the end portions 3I and 32 thereof will slide over the 4Vxed cylindrical end pieces I3 and I5 of the plug assembly. The casing is thus longitudinally shiftable between the outturned anges I2 of the fixed conduits II Aand can move from a fully opened position shown' in solid lines in Figure 2 to. a fully closed position shown in dotted lines in Figure 2. In the fully closed position the seat 46 of the casing engages the seat 26 of the plug.

The packing ring isl As shown in Figure l, the

The collar I 9 is split as at 20 and can be spread to remove the tongue I1 thereof from the groove I6 of the end piece I5. The collar, therefore, can readily be disassembled so that the packing 49 can be replaced.

Ordinarily, the shell 3D can be rotated by manual forces exerted on the rim or hand wheel portion 44 thereof. However, in the event that the casing should become stuck, the lever bar can be inserted in a hollow spoke and an enhanced leverage obtained for loosening the casing.

Stock owing in the direction indicated by the arrows in Figure 2 will enter the valve without being subjected to any obstructions. As indicated in Figure 2, the inside diameter of the cylindrical end piece I5 is exactly the same as the inside diameter of the conduit II and no obstruction is provided in the path of the incoming stream. The stream then flows past the fins 24 which are relatively thin and have rounded leading edges which will not impede the flowing material. The stream is then gently deflected by the leading end of the tear-drop shaped plug 25 to flow through the annular passage 41 provided between the plug 25 and the spherical casing 39. This annular passage bows the stream outwardly beyond the passage provided by theV conduits II and can be varied in capacity to provide any desired throttling action on the stream.

After the stock flows beyond the seat 25 of the plug it is then directed inwardly along a streamlined pathwhich will not cause disturbance of the stream. The stock then flows past therns 23 and into the other conduit II.

The throttling action made possible by valves of this invention can be exactly controlled, since the casing can be shifted any desired amount between a fully opened position and a fully closed position. i

The valve I0 shown in Figures 1 to 3 has a tear-drop shaped plug 25 which is especially adapted for use in fluid streams which flow only in the direction shown by the arrows in Figure 2. In the event, however, that the valve is to be used in a pipe line wherein the fluid streams may flow in either direction, the modification shown in Figures 4 and 5 is desirable. In these figures, parts substantially identical with parts shown and described in Figures 1 to 3 have been identified with the same reference numerals.

'Ihe valve I3a shown in Figures 4 and 5 has a plug 25a shaped somewhat differently than the tear-drop plug 25 in the valve Ill of Figures 1 to 3. The plug 25a is constructed in the same manner as the plug 25 and is connected through the same type of ns 23 and 24 tothe cylindrical end pieces I3 and I5. However, both ends of the plug 25a converge to a point, whereas the plug 25 only has the tail end converging to a point. The plug 25a is thus adapted to present pointed leading ends to fluid flowing in eitherdirection through the conduits II.

The valve IIa also has a somewhat .different shifting mechanism for the casing 39 thereof. In the valve Itia the cylindrical end portion 32 of the casing 33 has a rack 50 built up thereon.

with the flange but projecting only over the rack 50. This housing rotatably supports, at its inner end, a shaft 52 on which is secured a pinion 53 meshing with the teeth of the rack 50. The housing I provides bosses 54 on each side of the rack in which the shaft 52 is rotatably mounted. A hand Wheel 55 is secured on the outer end of the shaft 52 for facilitating rotation of the shaft.

Rotation of the pinion 53 will move the rack 50 to slide the shell or casing 3U on the end pieces I3 and I5 so as to move the seat 46 of the casing toward and away from the seat 26 of the plug 25a. The casing 3 is therefore shifted without rotation and the rim 44 may be dispensed with. However, since thecasing may get stuck on the end pieces I3 and I5, the rim 44 may prove useful in loosening the casing so that the rack and pinion can be freely operated.

From these descriptions it will be clearly understood that the valves of this invention include fixed plugs disposed in a flowing stream in such a manner as to prevent disturbances in the stream. The casings of the valve are longitudinally shiftable to obtain any desired throttling action on the flowing stream. The general design of the valve lends itself'very well to manufacture at low cost. The valve can be made up of non-corrosive material such as brass, or can have an all-iron construction and be rubber-lined if corrosive fluids areto be passed through the valve.

It will, of course, be understood that various details of construction may be varied through a wide range without departing from the principles of this invention and it is, therefore, not the purpose to limit the patent granted hereon otherwise than necessitated by the scope of the appended claims.

I claim as my invention:

1. A throttling valve comprising a hollow cylindrical end piece having an outturned ange for fixed connection with a conduit, a 1in secured to the .interior of said end member and projecting beyond the end member away from said flange, a hollow plug member secured on said fln, a second fin projecting from the other end of the plug member, a hollow cylindrical end piece secured on said n in spaced relation from said plug member, said second end member having a peripheral groove therearound, a flange engaged in said groove adapted for attachment to a second conduit, a spherically shaped hollow casing enveloping said plug and having cylindrical end portions slidable on said cylindrical hollow end members, and toothed means between said groove engaged flange and one of said cylindrical end portions of the casing for longitudinally shifting the casing to move the same toward and away from the plug.

2. A valve comprising a streamlined plug having an annular seat therearound, ns projecting laterally from the ends of the plug, hollow cylindrical end members surrounding said fins, a shell encasing said plug and slidable on said end members, a collar mounted on one of said end members and enveloping one end of said casing in screw thread relation with said end of the casing and means for rotating the casing to longitudinally shift the same relative to the plug.

3. A valve comprising a plug streamlined for iiuid flow therearound, fins extending from the ends of the plug presenting narrow edges only to fluid iiowing toward and away from the plug, hollow cylindrical end portions carried by said ns in spaced relation from each other and from the plug at each end portion of the plug, a casing enveloping said plug and bridging the space between the end portions, said casing having cylindrical end walls slidably mounted on` said cylindrical end portions, seals carried by the cycylindrical portions of the casing acting on the cylindrical end portions to prevent leakage of fluid from the casing, a removable collar mounted around one cylindrical end portion adapted to be secured to a pipe, tooth means carried by said collar, tooth means on the cylindrical end portion of the casing in engagement with said collar tooth means, and means for effecting relative movement between the tooth means to longitudinally shift the casing on the cylindrical end portions whereby the casing is moved toward and away from the plug to vary the capacity of the passageway provided between the plug and casing.

4. A throttling valve comprising a plug streamlined for fluid flow having ns projecting from the ends thereof and cylindrical end portions carried by said fins in spaced relation from the plug and from each other, said fins presenting narrow edges only to fluid flow around the plug, one of said cylindrical end portions having a removable collar disposed therearound, a casing bridging the space between said cylindrical end portions and having cylindrical end walls slidably mounted on the end portions, one of said cylindrical end walls of the casing extending into the removable collar in screw-thread relation therewith, means facilitating rotation of the casing around the plug and cylindrical end portions whereby the screw-thread relation between the collar and casing will effect a longitudinal shifting of the casing to vary the capacity of the passageway between the casing and plug.

5. A valve comprising a pair of spaced hollow end members, a plug carried by said members and disposed therebetween, a casing surrounding the plug and movably mounted on the end members to define a passageway around the plug and between the members, seals between the end portions of the casing and said end members to prevent leakage of fluid from the casing, a removable collar mounted around one end portion, and means between said collar and said casing for shifting the casing on the end members to vary the capacity of the passageway whereby said collar is adapted to be removed from said end member for facilitating replacement of the seal.

6. A valve comprising a pair of spaced hollow end members, a plug between said end members, fins connecting saidplug with the end members, a casing surrounding the plug and movably mounted on the end members to define a passageway around the plug and between the members, a collar disposed around one of said end members and having a portion overlapping the portion of the casing which is mounted on said end member, and means between said casing portion and the overlapping collar for shifting the casing to vary the capacity of the passageway.

LLOYD HORNBOSTEL.

Images