DE8805349U1 - Check valve for installation in pipelines - Google Patents

Description

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Bröef 94Ö6/88

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Check valve for installation in pipelines

The invention relates to a check valve for installation in pipelines, consisting of a circular ring-shaped installation frame with sealing rings and a shut-off valve which is pivotably mounted on the frame on one side and which, in the closed position, rests sealed against frame parts.

Such check valves are installed in pipes carrying fluid media, for example in water pipes, to prevent the fluid medium from flowing back in the return direction.

When the fluid flows forward, the check valve opens automatically in the direction of flow, while when the fluid medium flows back, it is automatically pushed into the closed position.

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In order to remove any leaches from the pipes when emptying pipe systems, which could otherwise lead to frost damage, for example, it is necessary to deactivate such non-return valves, which has previously been done by removing these non-return valves from the pipe.

This procedure is very time-consuming and therefore unsatisfactory.

Based on this state of the art, the invention is based on the object of creating a non-return valve of the generic type which can be used without removal |

from the pipeline can be set to function optionally 1, so that the fluid medium can also flow in the blocking direction |

The non-return valve can flow through if an operator so desires.

To solve this problem, it is proposed that

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the shut-off valve is rigidly connected, a rotating and sealed actuation shaft is coaxially coupled in the frame, the free end of which is connected by a side protruding from the frame.

j opening is accessible and a tool

j (intervention.

|)through this training it is possible to use a tool

tn to use the tool intervention, for example

Use a screwdriver to move the butterfly valve into the "release" position so that the fluid medium in the piping system can flow back against the normal flow direction. The

The tool grip can also be used as an internal polygon for the

j set of a polygonal key,

\ which is preferred.

S In further training it is suggested that the

actuation shaft out of the opening of the frame

protrudes.

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It is preferred that several sealing rings are mounted radially on the actuating shaft at an axial distance from one another.

An advantageous variant is that the actuating shaft is screw-connected to the swivel axis.

A possible alternative is that the actuating shaft is formed in one piece with the swivel axis.

An embodiment of the invention is shown in the drawing and described in more detail below.

ts shows:

fig. 1 a non-return valve in view;

tig. 2 also seen in section.

Eröer 9406/88

The check valve for installation in pipelines essentially consists of a circular ring-shaped |

Installation frame 1, which on its side front f

surface sealing rings 2 for sealed installation ·

in pipelines. A shut-off valve 3 is mounted on the installation frame 1 so that it can pivot in one direction, for which purpose a pivot axis 4 rigidly connected to the shut-off valve 3 is rotatably mounted in the frame.

When the flow medium is at a standstill, the shut-off valve 3 falls into the position shown in the drawing figures.

It rests against a surface of the mounting frame 1 with a sealing ring 5.

When the fluid medium flows through in the desired flow direction, the flap swings open and allows the medium to flow through. If the pipe network is to be emptied and the fluid medium flows against the

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If the air is to flow through the check valve in the opening direction of the shut-off valve 3, the shut-off valve is rotated using a suitable tool via an actuating shaft 6 that is rotatably mounted in the frame 1, so that the shut-off valve 3 is taken along and moved into the open position. For this purpose, the actuating shaft 6 is coupled coaxially to the pivot axis 4 of the shut-off valve 3, for example by means of a screw connection, with the front side of the actuating shaft being accessible through an opening that opens out of the frame at the side.

The end of the actuating shaft 6 protrudes slightly from the frame 1 and has a tool engagement 7 in the form of an internal polygon. Several radial sealing rings 8 are arranged on the actuating shaft 6 at an axial distance from one another, which seal the receiving bore of the actuating shaft 6 against the medium flowing through.

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The design according to the invention makes the manufacture of the check valve only slightly more expensive, but the emptying of pipelines equipped with such check valves is considerably simplified if the emptying has to take place against the normal flow direction.

The invention is not limited to the embodiment, but is variable in many ways within the scope of the disclosure.

All new individual and combination features disclosed in the description and/or drawing are considered essential to the invention.

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Claims (5)

1. Check valve for installation in pipelines, consisting of a circular installation frame with sealing rings and a shut-off valve which is pivotably mounted on the frame on one side and which in the closed position rests against frame parts in a sealed manner, characterized in that an actuating shaft (6) which is rotatably and sealed in the frame (1) is coaxially coupled to the pivot axis (4) of the shut-off valve (3), which is rigidly connected to the shut-off valve, the free end of which is accessible through an opening leading laterally from the frame (I) and has a tool engagement (7). 2. Check valve according to claim 1, characterized in that the actuating shaft (6) protrudes from the opening of the frame (1). * t &bull; ■ · β · · · · ca Broer 9406/88 3. Check valve according to claim 1 or 2, characterized in that on the actuating shaft (6) several sealing rings (8) are held radially extending at an axial distance from one another. 4. Check valve according to one of claims I to 3, characterized in that the actuating shaft (6) is screw-connected to the pivot axis (4). 5. Check valve according to one of claims 1 to h, characterized in that the actuating shaft (6) is formed integrally with the pivot axis (4). fe &iacgr;&iacgr;&iacgr;&iacgr;: : &iacgr; 4 J "&iacgr;·