DE1988593U - BACK SUCTION PREVENTS FOR CLOSET PRESSURE FLUIDS, SHUT-OFF VALVES OR PIPES. - Google Patents

Description

2-02

Pafenf-anwäl'fe

Bielefeld, .. fferdgr Strasse 17

Georg Host & Sons, Lerbeck (Porta), "Dorfstrasse 8

Back suction preventer for toilet flush valves, shut-off valves

or pipelines

The hiring "refers to a back suction preventer for Toilet flush valves, shut-off valves or pipes, the from a sealing against the perforated lateral surface of a frontally closed flow connection in the idle state Rubber sleeve and a sleeve surrounding this, provided with a Looh ring acting as a pipe interrupter Bushing, the inner diameter of which is larger than that Outside diameter of the G-ummimansshette in the resting state.

So with these anti-suck back valves by acting as a pipe interrupter acting Loehkranz can flow in enough air, the air passage cross-section must be dimensioned relatively large will. However, this has the consequence that the rubber sleeve when the valve is operated and there is strong back pressure in the line in the area of the perforated ring, this inflates excessively can naturally have a detrimental effect on the durability and functional reliability of the rubber sleeve «

To avoid excessive inflation of the rubber sleeve in the In the area of the perforated ring, the ventilation holes should be made of mesh-like fabric or mesh after the fire Perforated plates made of metal or plastic covered or deposited.

Another feature of the innovation is that one Back suction preventer of the type mentioned, in which the Rubber sleeve at the lower end has an outwardly projecting hand or flange, the bushing containing the Loohkranz in the area of the lower edge of the rubber sleeve has an inwardly open groove into which the outwardly protruding groove Hand of the rubber sleeve protrudes in the rest position with free play on all sides, while he is in a pressure jam in the line sealingly against the upper end face of the Kingnut.

In the drawing, the hiring is on two exemplary embodiments illustrated. Show it:

Fig. 1 is a longitudinal section through one formed after hiring Back suction preventer when the rubber sleeve is in the idle state,

FIG. 2 shows the arrangement according to FIG. 1, but in the working position located, i.e. inflated rubber sleeve,

Fig. 3 shows another embodiment of the back suction preventer in Longitudinal section.

In the exemplary embodiments shown, the anti-suckback device vreist in a known manner a frontally closed, provided with inclined flow channels 1 stub 2, one in the Rest state sealing against the perforated outer surface of this connection fitting rubber sleeve 3 and one with an as Pipe interrupter acting perforated ring 4 provided socket 5, whose inner diameter is larger than the outer diameter of the in the resting state rubber sleeve 3 · -Pie holes 4 the socket 5 are in the area of recesses 7 <ies Armatu-. " rengehäses 6.

The liquid flow flowing through the channels 1 when the valve is actuated causes the rubber sleeve 3 to expand, which consequently rests against the inner wall of the socket 3 (cf. can get

To avoid excessive inflation in the event of strong back pressure in the line to prevent the cuff 3 in the area of the ring collar 4, is in the embodiment of FIGS. 1 and 2 inside the socket 5 in the area of the Loehkranzes 4 a sieve-like perforated Metal or plastic sleeve 9 is arranged. In the embodiment according to FIG. 3, however, the socket 5 is in the area of the Loehkranzes 4 of a sieve-like perforated metal or Plastic sleeve 10 enclosed. It is also possible in the individual Holes of the wreath to insert 4 screen supports as it is it is also possible to manufacture the screen supports from the same material as the bushing 5 together with the latter in one piece.

The Gummimanseheΐte 3 is at its lower end with a angled outwardly projecting edge or flange 11 provided, while the socket 5 i ^ · area of the edge 11 one after has internally open recess 12 into which the hand 11 protrudes in the rest position of the cuff 3 with free play on all sides (see Fig. 1). In the event of a pressure build-up in the line, it lays down the edge 11 of the rubber sleeve 3 sealingly against the upper end face 13 of the annular groove 12 (cf. FIGS. 2 and 3) and This reliably prevents liquid from escaping through the perforated ring 4.

Claims (3)

P.A.2D2 ^ G-SA S .. protection claims 1 «Back suction preventer for toilet flush valves, shut-off valves or pipelines, consisting of a sealing against the perforated outer surface of an end face in the idle state closed flow connection fitting rubber mansehette and a cuff surrounding this, with a pipe interrupter Acting perforated ring provided with an inner diameter larger than the outer diameter of the in the resting state rubber sleeve, marked daäarch, that the ventilation holes (4-) provided in the socket (5) through sieve-like fabric or perforated plates (9 or 1G) made of metal or plastic are covered or deposited. 2. Back suction preventer for toilet flush valves, shut-off valves or pipelines, consisting of a sealing against the perforated outer surface of an end face in the idle state closed flow connection, provided at the lower end with an angled outwardly protruding edge Rubber mansehette and one surrounding the rubber mansehette, with a ring of holes which acts as a pipe interrupter and whose inner diameter is larger than the outer diameter the rubber mansehette in the resting state, characterized in that the socket 45) in the area of the lower edge (11) of the rubber mansehette (3) one to the inside - 2nd has open annular groove (12) into which the outwardly protruding Hand (11) of the rubber sleeve (3) protrudes in the rest position with free play on all sides, while it rests against the upper end face (15) of the singing groove (12) in a sealing manner in the event of a pressure build-up in the line. 3. Back suction preventer according to claim 1, characterized in that that the ventilation holes (4) are individually designed with sieve-like fabric or with perforated plates. 4-. Back suction preventer according to claim 1, characterized in that, that the socket (5) and the sieve-like fabric or perforated plates are made from the same material or from one piece are.