DK144921B - REVERSE AND ODOR PREVENTING CLOSES FOR LIQUIDS - Google Patents

Description

(19> DENMARK (¾)

W (12) PUBLICATION WRITING πυ 144921 B

DIRECTORATE OF

THE PATENT AND TRADEMARKET SYSTEM

(21) Application No. 2569/7 ^ · (51) IntCI * E 03 C 1/28 (22) Filing Day 9 · May 197 ^ · E 03 F 5/042 (24) Running Day 9 · May 1 97 ^ (41) ) Aim. available 1 1 · HOV. 1 97 ^ · (44) Presented 5 · Jul. 1982 (86) International application no.

(86) International filing day (85) Continuation day "(62) Application for stock"

(30) Priority 10 May 1973, 2323687, DE 25 Jul. 1973, 2337853, DE

(71) Applicant ADAM KLENK, 6101 Ernsthofen, DE: HELMUT KLENK, 601 Ernsthofen, DE.

(72) Inventor Same.

(74) Associate Company Chas. Hude.

(54) Reflux and odor prevention closures for liquids.

BACKGROUND OF THE INVENTION The invention relates to a reflux and odor preventing closure for liquids, particularly drainage water, and intended to be placed under a downwardly extending drainpipe, which closure has a sealing flap hinged to the side of a horizontal axis, cooperating with a drainpipe enclosing and sealing means. normally held in the closing position by a counterweight, thereby forming a trapping bowl with an overhead edge facing away from the oscillation axis, which receives a quantity of liquid determined at a downwardly directed position of the drain pipe and if in the closing position the upward edge encloses the lower end of the drain pipe.

= r ^ Such a closure, in which the closure flap is normally in the closing position, and which opens only for the discharge of co-liquid in the subsequent channel, is known from CH-PS 43.867 · In the closing position the flat is bottom of the catch flap formed against a bottom surface of the drain pipe. covering sections of the sealing member. The axis of oscillation of the closing flap and the catch bowl, respectively, lies below the bowl, while the counterweight is mounted immediately next to the bowl. The capture bowl, whose bottom in a closed position occupies a horizontal position, can only be swung at an angle of approx. 45 ° because the edge of the bowl adjacent to the counterweight strikes the drain pipe.

It is contemplated that with the closed capture bowl, a liquid residue remains in the bowl, so that the sealing site between the bowl bottom and the sealing ring is immersed in liquid, thereby forming an odor barrier.

With this known closure, it is a disadvantage that at low inlets, the capture bowl occupies a only partially opened intermediate position, in which inlets run over the lowered bowl edge. In this way, however, the bowl is only insufficiently cleaned of the dirt contained in the stream which settles on the bottom of the bowl and in the closing position is squeezed between the bowl bottom and the sealing ring, so that no complete seal can be obtained, especially not against a reflux of liquid. Furthermore, as the inlet flows away over the sealing ring, there is the risk that the sealing ring will be damaged by entrained solids, such as sand and stones, or chemical substances present in the wastewater. Also, a safe odor barrier does not occur with the liquid in the pickup bowl, as the bowl, when inaccessible, quickly dries out. This condition can also occur through suction in the duct. Furthermore, because of the closed flap the seal lies against the bottom of the bowl on which the supply gathers, a freezing of the bowl in winter must be expected, whereby the closure is no longer functional. Therefore, the well-known well-known closure is suitable only for installation in heated buildings and not as drainage or groundwater drainage. Finally, it should be noted that in the known construction, the pivot axis must be positioned below the pickup bowl and that the pickup fluid acts to open with a relatively short lifting arm, whereby a portion of the pickup fluid acts in the opposite direction. Therefore, a relatively large amount of liquid must accumulate in the collecting bowl before it swings. This leads to large dimensions and possibly at low flow, so that the bowl does not empty frequently enough to avoid odor formation.

The object of the invention is to provide a closure of the kind in question, which is neither soiled nor frozen, and which, even under extreme conditions, even after extended operating hours, works fit and function-safe and is thus universally applicable.

The closure according to the invention is characterized in that the sealing means is arranged so that the lower end of the drain pipe can cooperate with the upward edge of the flap, that the bottom of the catch bowl rises straight to the overflow edge, that the drain pipe ends above the highest liquid level in the catch bowl. its closing position, and that the capturing bowl in the closed position, the counterweight and the axis of oscillation located therein lies essentially in a horizontal plane.

However, a closure with pivotally mounted cup-shaped closure flap is known, at which the pivot axis is disposed at one end of the pickup bowl and, together with the closure flap and its counterweight, lies substantially in a horizontal plane (FR-PS 555, 160). Here, however, the closing flap does not work with a sealing member. Therefore, the only seal is obtained when the sealed pipe closes in the liquid collected in the collecting bowl. This closure is ineffective against reflux and also loses its effect as an odor barrier as soon as the liquid dries out in the pickup bowl.

At the closure of the invention, the seal is protected by the drain pipe outside the flow path of the draining fluid.

It is therefore protected against damage by dirt or chemical substances in the process. In addition, the lower end of the drain pipe is placed so high above the closed closure flap that it does not dive into the trapped fluid, which could lead to freezing. Furthermore, the distance between the lower end of the drain pipe and the bottom of the closure flap, or the catch bowl, also presents a risk that even relatively large solid particles can run freely over the closure flap and can be clamped upon closing, which has an incomplete seal. follow. Furthermore, it has been found that by properly sizing the counterweight, a small amount of fluid in the pickup bowl extends to swing the flap to fully open position where it does not impede the drain. Then the flap closes completely again without remaining in an intermediate position. Only in the case of a continued strong flow, the flap remains in a substantially completely open position. The reason for this lies in the fact that the closed liquid, due to the inclined position of the bowl bottom, accumulates in the vicinity of the bed and then at the initial flap opening flows to the farthest away from the bed of the collecting bowl and thus acts with increasing lever length while due to the application of the flap, pivot axis and counterbalance the effective lever arm for the counterbalance correspondingly becomes smaller. Conversely, during the emptying operation, a complete closing and pressing of the flap against the sealing means is possible, so that in the closing position, in which the counterweight works with its longest lever arm, a complete odor seal also emerges in the dry flap. Furthermore, the described complete opening of the closure flap, whereby most of the total fluid flows substantially over the entire bottom surface of the bucket closure flap, ensures a particularly good cleaning of the adhesive solids flap.

Conveniently, there is an estimate which, e.g. may be the drain pipe itself, to limit the oscillation area of the closure flap to an angular range of approx. 90 °. This measure prevents the closing flap from swinging upwards so far that the counterweight does not exert any closing or closing force on the closing flap, respectively. On the other hand, the closure flap generally swings completely out of the path of the flowing liquid, so that, at a correspondingly strong flow, the discharge of liquid is not substantially hindered by the opened closure flap, and it is advantageous that only a very small retracting force acts on the closure flap. in the fully open position.

144921 5

By. In a convenient embodiment, there is a closed air chamber on the underside of the capture bowl. In the case of reflux, the air chamber forms a driving body by means of which the closing flap is pressed against the sealing means with an additional force. In addition, in a buried playroom, the flap can be pressed against the sealing member on the side closest to the bed as well. In the embodiment with an air chamber, the closure flap conveniently has a substantially rectangular or trapezoidal hollow profile, and the bottom of the capture bowl is lined by a diagonal wall separating the air chamber from the collecting bowl.

Such a closure flap can be made relatively simple, whereby, by compact design of the closure flap, an appropriate bucket-shaped bowl and an advantageous arrangement of the air chamber are obtained.

In addition, it is advantageous to place the sealing member on the underside of a drain rudder surrounding horizontal plate. This feature leads to a sparing and thus increasing the life of the seal as the forces exerted by the upwardly closing flap are absorbed by the horizontal plate, thereby affecting the seal only to pressure, and damaging cutting forces which would otherwise occur by attaching the seal to the the outer circumference of the drain pipe.

The invention is explained below with reference to the drawing, in which fig. 1 shows a vertical section through an embodiment of a reflux and odor-preventing closure according to the invention built into a shaft and placed in the closing position; FIG. 2 the same as FIG. 1 in the open position, and FIG. 3 is a sectional view taken along line III-III of FIG. First

According to FIG. 1-3 is a reflux and odor prevention closure 1 disposed in a vertical shaft 2 of circular cross section. The shaft 2 has on its inner surface three spacers 3 spaced apart, on which rests a support ring 4, which carries 6 U4S21 closed. A circular support plate 5, the diameter of which corresponds to the inner diameter of the shaft 2, is provided on its underside with a ring 6 consisting of sealing material against which the support plate 5 rests. The support plate 5 is provided with an inlet opening 7 which is located outside the center of the plate, to which a drain pipe 8, connected to the support plate 5, joins, which drain pipe 8 has a corresponding rectangular cross-section and extends downwards.

Over the lower end of the drain pipe 8 is mounted a bearing plate 10 extending parallel to the support plate 5, the shape of which, as can be seen in FIG. 3, does not completely fill the shaft. The bearing plate 10 is provided on the underside with two spaced apart support plates 11, between which extends a pivot shaft 12 in the horizontal direction. On the pivot shaft 12 is mounted a pipe piece 13. The pivot piece 13 thus pivoted carries on its one side a closing flap 14 and on the diametrically opposite side a pair of arm plates 15, between which extends a massive cylindrical counterweight 16, which serves to force flap 14 in the embodiment of FIG. 1, in which the upper edge of the flap 14 seals against a sealing member 16a, which is arranged on the outside of the drain pipe 8 and is fixed to the underside of the bearing plate 10. The lower end 9 of the drain pipe 8 extends beyond the sealing member 16a.

Flap 14 is provided with a bucket-shaped catch bowl 17 for the running fluid. The bowl 17 is enclosed by a wall 18 which is adjacent to the pipe piece 13, a bottom 19 joining the lower edge of wall 18r and two triangular side walls 20, the upper edge of which is in a common plane and forming the rim 21 of the flap, as in the closing position of FIG. 1 is horizontal and abuts the underside of the sealing member 16a. Underneath the bottom 19, which rises towards the overflow edge, there is a closed air chamber 22 which is enclosed by the bottom surface 19, a lower wall surface 23 extending from the lower edge of the wall 18, a front wall 24 and two side walls formed by continuation. of the side walls 20.

Claims (2)

7 m 921 As shown in Fig. 2, the counterweight 16 is in the open position against the drain pipe 8, and the bowl 17 is pivoted approx. 90 ° and is outside the flow range of the running fluid. The counterweight 16 is thereby substantially vertical over the pivot shaft 12. The parts of the closed 1 are, with the exception of the rings 6 and 16a, which consist of sealing material, such as rubber, made of plastic. However, these parts or some of them may be made of metal. Claims. 1. Reflux and odor-preventing closure for liquids, particularly drainage water, and intended to be placed under a downwardly draining pipe (8), which in the position of use has a pivotal bearing (8) pivotally mounted on a horizontal axis (12). closure flap (14) which cooperates with a sealing member (16a) enclosing a drain pipe (8) and which is normally held in the closing position by a counterweight (16) thereby forming a catch bowl (17) with an overflow edge facing away from the pivot axis (12), which receives a quantity of liquid determined at a downward position of the drainpipe (8), and if in the closing position the upwardly extending rim (21) encloses the lower end of the drainpipe (8), characterized in that the sealing means (16a) is arranged thus above it. the lower end (9) of the drain pipe (8) to cooperate with the upward edge (21) of the flap, that the bottom (19) of the catch bowl (17) rises rectilinearly towards the overflow edge, that the drain pipe (8) ends above the highest liquid mirror in the receiving bowl (17) in the the locking bowl (17) in the closed position, the counterweight (16) and the pivot axis (12) lying therein are substantially in a horizontal plane. Reflux and odor prevention closure according to claim 1, characterized in that there is a stop which e.g. may be the drain pipe (8) itself, to limit the oscillation area of the closure flap (14) to an angular range of approx. 90 °.