Patent GB-1050144-A (GB)
IPC: E02B7/54
Abstract: 1,050,144. Penstocks. HARTLEY (STOKEON-TRENT) Ltd. July 19, 1965 [April 17, 1964; May 12, 1964], No. 15937/64 and 19650/64. Heading E1H. A penstock or sluice-gate includes a door 25 (Fig. 1, not shown) having a sealing strip or flap which is made of an elastomeric material, e.g. rubber and has a heel-portion 10<SP>a</SP> attached to the bottom of the door by a plurality of screws 12, a flexible toe-portion 10<SP>b</SP> of the strip being formed obliquely with respect to the heel-portion so that it is urged by liquid pressure against a bottom portion of a frame 20 for the door. The lower edge 25<SP>a</SP> of the door is bevelled and pressed against the frame by a spindle or screw for moving the door. A sealing strip 10<SP>a</SP>, 10<SP>b</SP> is also attached to one face of the door adjacent each of its side edges (Fig. 2, not shown), a strip 15 which is made of lowfriction material, e.g. nylon, being attached to the other face of the door in register with the heel portion of each sealing strip to bear against one side of the central portion of a T-section member in the frame 20. The other side of said central portion may be engaged by a strip 40 which is similar to the strip 15 and carried by a metallic strip 13 having a crankedshape in cross-section. The strip 40 bears the thrust acting on the door when fluid-pressure is applied to the face opposite to that on which the strips 10<SP>a</SP>, 10<SP>b</SP> are mounted. The door is kept from contact with the flanges of the frame by the strips 40 protruding laterally beyond the edges of the strips 13. The strips 15, 40 may be attached to the door and the strip 13, respectively, by screws 33, 37 (Fig. 3, not shown). In a first modification (Fig. 4. not shown), each of the strips 13, 40 are replaced by a bar 50 which is attached to a flange of the frame 20 adjacent each sealing strip and carries a strip 61 of low-friction material, a similar strip 62 which protrudes beyond the edge of the door being provided in place of each of the strips 15. In a second modification (Fig. 5, not shown), the strips 15, 40 are merely omitted. In a third modification (Fig. 6, not shown), either the strips 15 or the strips 40 are omitted. In a fourth modification (Fig. 7, not shown), each of the strips 15 carries a further strip 34 of low-friction material. In a fifth modification (Fig. 8, not shown), each of the sealing strips has its heel-portion 10<SP>a</SP> lodged between the door and the associated strip 15. In a sixth modification (Fig. 9, not shown), each of the strips 40 is carried by a metallic strip 53 which is attached to the door by a plurality bolts 52 and carries a further sealing strip 10<SP>a</SP>, 10<SP>b</SP> arranged so that fluid pressure can be applied to either face of the door, the strips 40 being made to either protrude beyond or be flush with the outer edges of the strips 53. In a seventh modification (Fig. 10, not shown), the arrangements of the various strips according to Figs. 8 and 9 are combined. In an eighth modification (Fig. 11, not shown), each sealing strip has two toe-portions 10<SP>b</SP> and a single heelportion 10<SP>a</SP> fixed to the edge of the door, the toe-portions being in abutment with anglesection members 42 attached to the frame 20. A strip 15 is mounted on both faces of the door adjacent each of the sealing strips. In a ninth modification (Fig. 12, not shown), the sealing strips are mounted with their heel portions 10<SP>a</SP> fixed to the flanges of the frame so that the toe portions abut the door and the strips 13, respectively, the strips 15, 40 being mounted according to Fig. 2. The strips 15, 40, 62 may be fixed to the frame 20 instead of the door in any of the aforementioned arrangements. The top of the door may be sealed by a flexible strip 56 (Fig. 13, not shown) and a strip 59 of the low-friction material abutting an angle-section member 60. Alternatively, the top of the door is sealed by a sealing-strip 10<SP>a</SP>, 10<SP>b</SP> (Fig. 14, not shown) and a strip 59 of lowfriction material abutting the member 60. In any instance, the strips of low-friction material may be replaced blocks of the same material which are spaced apart from one another.