US1968730A - Weir - Google Patents

Description

July 3l, 1934. H. ZIMMERMANN WEIR Filed Aug. 22, 1932 2 Sheets-Sheet l Mgg.

/n ugento/.- AL 3 1 M W1 @www1 n July3l, 1934. H. ZIMMERMANN wEIR Filed Aug. 22, 1952 2 Sheets-Sheet 2 Patented July 31, 1934 l; UNITED sT'ATes WEIRk Hans Zimmermann, Dortmund, Germany, as-

sgn or to` the firm Vereinigte` Stahlwerke, Aktiengesellschaft, Dusseldorf, Germany Application August 22, 1932, serial No; 629,927`

` In Germany February 24, 1931 Y c claim.V (cl. 61-26) l the flap slidihgtightlyagainst the surfaces of the shields facing the water.` If in such cases the Weir lrecess has to be sealed against any overflow water, .thentheside shields must extend over the whole' Wdth-` of the recess'. This however gives l rise to certain difiiculties in the arrangements for moving theflap, since theap actuating means 'mustl Yeither go round the lateral shields or through them. In the case of aps which, for

the' purpose of preventing. the weirv itself from being wetted by water overflowing, are made as wideas the Weir itself, there will obviously have tobefalconsiderable length of the lateral seal. Furthermore the sealmust be afdxedto the movable flap and this renders `difficult access to, and

reltightening of, leaking sections' because the overflow water entirely shuts off the space under the flap where the re-tightening has to be carried out and which isalso enclosed on top bythe pent 'water and atthe sides by the shields.

The present invention overcomes these difliculties `by the'fact thatthe side connementof the water stream whichflows over `the flapl is effected` bya shield which "is 'connected with the flap a'dwhich projectsbehind a side wall of the u 95 Weir body against which wall the shield is sealed by a tight sliding means extending over the Whole height of the flap. The seal is stationary and can therefore be easily re-tightened from the recess, in any position of the iiap While the operator is in a perfectly dry place. The Weir wall which the flap extends, it is ensured that if the seal at the side should leak, the space under the ap does not freeze in Winter and hinder the movements of the flap. Y y

In order to illustrate the invention the drawings Nos. 1 to 4 are attached.

Figurel is a partialy cross section through the Weir and the flap showing `the side shieldin side elevation. p

Figure 2 is the corresponding plan.` j Figures 3 'and 4 are anA elevation andV aground 6.9 plane respectively of a particular' form of application of the side seal and itsre-.tightening dev1ce.

Fig. 5 is a (partial) longitudinal Vsection of the re-tightening device according to line 5--5V of Fig. Land w Fig.v 6 is a plan view according to Fig. 5.

In Figures 1 and 2, 1 is the 'weir itself, 2 is `the flap, 3 is a side wall affixed to the weir itself, f4 is thexed side seal of the ap, 17j is the means for 70 raisingY the flap, which may engage, for ext ample, at 5 with the bolt 7 which is arranged on the flap .and projects into the Weir recess, 18 is the'means for lifting the weir which is connected at 6 to the Weir. '8 is thewater flow when 75 the flap 2 has been lowered through'an anglea yinto the position 2' which is shown in dotted lines. 9 is a side shield which is arranged on the Aflap and projects towards the high water level behind the wall 3 on the air side thereof in such a way as to engage the said walllaterally. The position `of the side shield 9 when the flap '2 has been lowered into the position 2 is shown at9 in dotted lines. 10`is`the space between the side shield 9 on the flap and the side wall 3 of the Weir,` which is free from water and inpwhich the means for re-tightening `the sealing devicefor the flap canbe, arranged. j` y, It'is readily `seen that the length off'tlielateral seal is limited to the elfective height h of the flap, and that no matter at what angle the iiap may rest, its position is unaltered. i

Figures 1 and 2 also show that no water can enter into the space under the flap, because the side shield of the flap is firmly connected with its wall so that no impediment to the movement of the flap can result from the formation of ice. These drawings also show that the re-tightening means for the seal of the flap, which are arranged in the space 10, are accessible from the 1.00 recess at all positions of the flap and even while the water is flowing over. It is further evident that the means 17 for raising the flap 2 can be secured thereto within the recess at any desired place, without interfering with any other struc- ,195 tural parts of the Weir. U

In Figures 3 and 4, the parts which are shown in Figures 1 and 2 are marked by the same reference numbers. Thus 1 is the wall of the weir itself, 2 is the nap, 3 is the side wan of the Weir. 1&0

4 is the resilient side seal for the flap, 9 is the shield affixed to the flap, is the space between the walls 3 and 9, 11 is an eccentric shaft which rests in bearings at 12 and 13 on the weir itself or on its side wall 3 which serve also for mounting the seal 4, 14 is a ratchet wheel which is wedged on to the eccentric shaft 11 and with which engages a pawl 15; 16 is a spanner by which the eccentric shaft 11 can be rotated.

Figures 3 and 4 illustrate a particularly simple design for re-tightening the seal 4 and are meant to illustrate the advantage of the present invention, which consists in that. the sealing member can be re-tightened, mounted and removed easily from the recess no mater what the position of the flap may be. If the sealing device is to be re-tightened, when the spanner 16 isl put on to the upper end of the eccentric shaft 11 and the shaft is rotated in a direction to tighten the seal 4 against the walls 3 and 9 until the requisite seal is accomplished. After tightening of the seal the pawl 15 will help to maintain the tightening'pressure. If the seal isfto be removed then the upper shaft bearing 13v is removed and the shaft 11 and the seal 4 are. taken out in an upward direction, whereupon the new seal and, after that, the eccentric shaft 11 are put into position from above. In Figures 5 and 6 the re-tightening means are more clearly shown; in Fig. 5 which is a section seen from the up-stream side towards the downstream side, l1 is the shaft of the tightening devicewhich isrotatably mounted between the side shield `9 of the flap and the side wall 3 of the Weir in the bearing plates l2 and 13 by means of the eccentrically disposed pivots 19 and 20, the upper pivot 16 being provided with the ratchet wheel 1.4 and a square-head for engagementl of a spanner 16 (see Fig. 3). A pawl 15 which is row tatably mounted onthe plate 13 is held in engagement withl the ratchet wheel 14 by means of a spring 21 (see Fig. 6).

In the above description the present invention is illustrated as applied to a ood Weir. It

r is however not limited to this type of wei'r vbut can be used to advantage with' all weirs which can be provided with superimposed flaps. In the place ofthe seal and the re-tightening means for the same which have been illustrated in Figi ures 3 and 4, and described hereabove, other such far as the invention is concerned, it does not matter whether the side shield 9 of Ithe flap 2 is arranged on the air side or on the water side of the side wall 3 of the Weir l provided that the water flow 8 is either totally or partly confined by theside shield 9 in relation to the recess.

What I claimand desire to secure by Letters Patent isz- 1. A weir of the type having a superimposed ap, comprising a side wall to said weir, a shield secured to said flap at its side to confine water flowing over said weir and projecting behind said wall on the air side thereof, and a seal between said wall and said shield of a length substantially equal to the maximum effective height of said flap.

2. A weir of the type having a superimposed ap, comprising a side wall to said weir, a recess on the'air side of said side wall, a shield secured to said flap at its side to confine water flowing over vsaid weir 'and projecting' behind said wall on the air side thereof, av seal between said wall and said shield of a length substantially equal to the maximum effective height of said flap', and means accessible at all times from said recess for tightening said seal.

3. A weir as claimed in'claim 2,v wherein said means comprise bearings in said weir wall, a shaft eccentrically mounted in said bearings, and means to rotate said eccentric shaft to tighten said seal.

4. A weir as claimed in claim 2 wherein said means comprise bearings in said weir wall, a

shaft eccentrically mounted in said bearings, a

ratchet wheel upon saidshaft, a pawl engaging said ratchet wheel, and a Spanner Yto turn said shaft to tighten the said seal.

5. A weir of the type having a superimposed flap, comprising a side wall to said weir, a shield secured to said flap at its side to confine water owing'over said weir and projecting behind said wall, and a seal between said wall and said shield. 6. A weir of the type having a superimposed ap rotatable about an axis on the weir, comprising side walls secured' to the weir, side shields secured to the ap for preventing water from owing off laterally, said shields projecting towards the high waterV side behind the said walls,

stationary seals between the said shields and the -said walls, the said walls extendingwith their edge directed towards the low water side tothe axis of rotation of the flap.

HANS ZIMMERMANN.

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