DE2348378A1 - Double backflow closure for drain ducts - has float ball in obliquely falling chamber with lip seal and closure valve - Google Patents

Abstract

Double backflow closure for drain ducts automatically closes sealingly, with a valve housing in the duct with the upper inlet closable by a float ball having guides in the housing and resting laterally of the throughflow duct when inoperative. A closure valve is in front of the valve housing. The float ball, when inoperative, is in a chamber which falls away laterally and obliquely from the feed and drain connections, and for backflow lies against a lip seal in the feed connection. The closure valve is directly above the valve housing. Reliability of closure is increased.

Description

Applicant: o7C1 Aitrip / Rh., 2 $. 9. 1973

Wilfried Hook

6701 Al trip / 348378

Römerstrasse 11

Double lock for backflow

The invention relates to a backwater double lock for continuous lines and basement drains to the independent and tight closing in the event of a back pressure, in which a valve housing is arranged in the line, its top Lying inlet with the help of a guide in the housing guided float ball is sealable, which is in Rest position is located to the side of the flow line, and that a shut-off valve is provided in front of the valve housing is.

It is, for example, a backflow stop for continuous

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Lines "known, which is designed as a backwater double lock, whereby for independent closing a backflow flap is provided and for closing a manual valve is installed. However, this known embodiment has the disadvantage that an independent and tight closing in the event of a backwater is not possible, in particular due to the existing dirt, the seals The backflow flap does not close satisfactorily. In addition, the hand lock is prone to failure and easily leads to clogging . A further development of this

known embodiment with an electrically driven The lock is expensive and offers no security in the event of a power failure · They are also ball locks known, which jecbch partly do not leave a full flow cross-section free, so that they are only used as waste water drains are suitable and also have the disadvantage that their structural design makes them efficient Manufacturing is not possible, besides, there is no possibility for a quick release of the drain line.

The invention is based on the object of avoiding these disadvantages, in particular such a double backflow closure to be designed with simple means in such a way that the self-contained backflow stop already he - .. aims and thus greater security in the event of a surprising backlog.

This object is achieved according to the invention is that the float ball obliquely in its rest position in a downward sloping side of the inlet and outlet located sammer and extending in a back pressure against

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I- ρ

in the inlet provided lip seal places, with the shut-off valve immediately above the valve housing is arranged.

An advantageous embodiment is that

the shut-off valve on a cylindrical housing- .. ..--—

has, in which a cylindrical plug is arranged, wherein a one-piece seal is provided, consisting from two sealing rings located at the ends of the plug, which are located on both sides by means of diametrically opposed Sealing strips are connected.

The plug is advantageously actuated via a. Chain or rope hoist.

It is also advantageous that the chamber is closed by means of a cover.

The embodiment according to the invention has the significant advantage that, by simple measures, a securely closing Kick jam double lock is created, in which neither blockages nor malfunctions, for example due to power failure, may occur. The individual parts can be easily produced without difficulty, with the shut-off valve can be locked by pivoting through 180 °

The invention is described in the following description using an exemplary embodiment in conjunction with the Drawings explained in more detail.

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Show it,

Figure 1 shows a cross section through the invention

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appropriate double backflow closure,

Figure 2 shows a cross section along the line A-A in Figure 1 and

Figure 3 shows a cross section along the line B-B

in Figure 1 and the representation of a manually operated lever lock.

The double backflow stop shown in Figures 1 and 2 has a valve housing 1 to which an inlet line 2 is connected at the top "with the interposition of a shut-off valve 3", while the drain line 4 is attached to the valve housing 1 at the bottom. On the side of the valve housing 1 there is a downward sloping chamber 5 which can be closed with the aid of a screw cap 6. The inclined guide 7 on the chamber 5 guides a floating ball 8 in the event of a backflow into the closed position 8 ^f , whereby after the backflow water has run out, the ball 8 can roll into the chamber 5 via guides 9 arranged on both sides inside the housing 1, ie the rest position. In the sealing position 8 ¹ , the ball is pressed against a lip seal 10.

The shut-off valve is located directly above the housing 1 3, which has a cylindrical housing 11 in which a cylindrical plug. "~ -12 is rotatably arranged is. The axis of rotation runs perpendicular to the direction of flow through the opening formed by the seal 10. A specially designed seal consisting of two at the ends of the plug 12 is used to seal the plug 12 arranged sealing rings 13 is made with the help of two

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I t t =

diametrically opposite one another. Sealing strips 14-connected. For the actuation of the plug 12, a laterally arranged on the housing 11 the lever 15 is provided, said housing 11 closed comparable g by means of a lid 16 is "In Figure 2, the position of the lever is shown in phantom in FIG. 15 closed condition. The valve $ can be opened or closed by simply pivoting the lever 15 through 180

In another embodiment, the shut-off valve 3 be designed such that the axis of the plug 12 coincides with the direction of flow on the seal '10.

The embodiment shown in Figure 3 shows the possibility a remote control of the closure valve 3, the handle 15 protruding from a wall covering 17 at handle height. The chick with its shaft 18 is about a Chain or cable pull 19 ”over pulleys. 20 led is actuated. ·.

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Claims (3)

Protection claims ί 1) / Eückstaudoppelverschluß for continuous lines - ' for independent and tight closing in the event of backflow, in which a valve housing is arranged in the line, the inlet at the top can be sealed with the help of a float ball guided in the housing on guide parts, which is laterally in the rest position from the flow line, and that a shut-off valve is provided in front of the valve housing, characterized in that the float ball (8) is arranged in its rest position in a sloping downwardly sloping chamber (5) to the side of the inlet and outlet (2, 4) is and in the event of a backflow against a lip seal (10) provided in the inlet (2), the shut-off valve (3) being arranged directly above the valve housing (1). 2) double backflow lock according to claim 1, characterized in that that the shut-off valve (3) has a cylindrical housing (s) in which a cylindrical Chick (12) is arranged, wherein a one-piece seal is provided, consisting of two at the ends of the / Plug (12) located sealing rings (13), which on both sides by means of diametrically opposite sealing strips are connected. 3) backflow double lock according to claim 1 and 2, characterized characterized in that the actuation of the plug (12) is about 509815/058 3 -sr- a chain or cable pull (19) takes place. Double backflow lock according to claim Λ , characterized in that the chamber (5) is closed by means of a cover (6). 9-erS / 0583