DE20013926U1 - Connection adapter for water pipes with bypass - Google Patents

Description

Applicant: Stuttgart, 11.08.2000

P7587Gm B/ho/ki JUDO

Water Treatment GmbH
Hohreuschstrasse 39-41

D-71364 Winnenden

Representative:

Kohler Schmid + Partner
Patent Attorneys GbR
Ruppmannstrasse 27

D-70565 Stuttgart

Connection piece for water pipes with bypass

The invention relates to an intermediate connection piece for attaching a water treatment device to the pipeline of a water network, in particular a domestic water network, which has a flange for connecting the intermediate connection piece to the pipeline, in particular to a connection piece installed in the pipeline, and a further flange for connecting the water treatment device to a matching counter flange, wherein the intermediate connection piece has channels that connect the pipeline of the water network to the water treatment device.

Such a connecting intermediate piece is known, for example, from DE-GM 80 28 344.

On a flange there is a connector with a counter flange for insertion into the course of a water pipe with one connection each for connecting to the inflow and outflow water pipes, whereby the two pipe sections are separated from each other by the connections and, after being deflected by 90°, open into the counter flange of the connector. The second flange on the intermediate connector can be connected to a device to be connected, whereby the intermediate connector has channels leading from the mouths of the pipe sections in the counter flange to connections for a device.

The known device has a valve in the intermediate piece with two valve elements which, in one position (operating position), separate the inlet-side channel from the outlet-side channel and, in the other position (bypass position), connect the inlet-side channel with the outlet-side channel and separate at least one of the connections for the device from the associated channel. The valve is designed as a piston slide valve with two pistons. The two pistons are attached to a common piston rod.

The disadvantage of this known device is that when the bypass valve is closed, water must be displaced by the piston against the applied pressure, which requires a certain amount of force. There is also the risk of the bypass valve opening unintentionally due to the applied water pressure.

The object of the present invention is therefore to avoid the above-mentioned disadvantages and to present a device of the type mentioned at the beginning, with which a changeover from the operating position to the bypass position

Position is possible without effort and unintentional opening is impossible.

This object is achieved according to the invention in a surprisingly simple but effective manner in that an adjusting disk which can be rotated in at least two positions and through which the flow is essentially perpendicular to the disk plane is provided in the connecting intermediate piece, whereby the adjusting disk in one position (= operating position) connects the central channels leading to the water treatment device and the ring channels leading away from the water treatment device to each other and in another position (= bypass position) connects a central channel to a ring channel, and at the same time the central channels and the ring channels

Of course, the flow direction can also be reversed, so that water is fed to the water treatment device through ring channels and led away from it through the central channels.

A rotary valve for distributing liquid is known per se, for example from DE 44 37 547 C1. However, the disadvantage of this known rotary valve is that when the valve is open, it is not possible for the fluid to flow through the rotary valve in two opposite directions at the same time, i.e. from the main channel into a branch channel and vice versa, while the direct flow of the main channel is interrupted. The known rotary valve would therefore not be useful for use with a connecting intermediate piece of the type according to the invention.

The rotating adjusting disc used in the connecting intermediate piece according to the invention allows the device and the water pipe to be separated from one another (bypass position) or connected to one another (operating position). The adjusting disc can be rotated into the appropriate position, for example, using an adjusting handle located on the adjusting disc, without any movement against the applied water pressure.

The adjusting disc allows two different flow directions to be set by simply turning it. For this purpose, the adjusting disc is divided into segments, with segments for bypassing and segments for operating the water treatment device.

The water flows through the adjusting disc essentially vertically, so that an undesirable twisting of the adjusting disc due to the applied water pressure can be excluded.

The control handle can be removed in the bypass position. This prevents accidental or unauthorized opening without a connected water treatment device. In the bypass position, the connected water treatment device can be easily and safely disconnected from the pipe network without interrupting the water supply to the consumer. This may be necessary for maintenance or cleaning work as well as for assembling and disassembling the water treatment device.

In an advantageous embodiment, the adjusting disc is divided into six segments of 60° each, with three segments each being provided for bypassing and operating the water treatment device. The resulting adjusting angle of 60° can be achieved between the fastening screws, which are arranged at an angle of 90°, with sufficient lever width.

Alternatively, in a further embodiment, the number of flow segments can be increased so that the adjustment angle of the handle is reduced and thus less space is required for the operation of the adjustment handle.

In a variant that is particularly easy to implement from a technical perspective, the number of webs and thus the number of flow segments can be reduced. This increases the free passage and thus reduces the pressure loss.

In a preferred, inexpensive embodiment, the adjusting disc is made of plastic such as polyoxymethylene with separate sliding discs, which can be made of polytetrafluoroethylene (= Teflon®), for example.

Another variant is advantageous if the adjusting disk is made of a metallic material. Metals are very resistant to mechanical, thermal and chemical influences. The metal can be coated with a lubricant, or separate sliding disks can be used. Polytetrafluoroethylene (= Teflon®) is particularly suitable as a lubricant.

The housing can be made entirely of metal or plastic.

In a particularly advantageous embodiment of the invention, the outer housing is made of metal or an alloy such as brass. These materials have a high pressure resistance and show a high mechanical stability during assembly.

Preferably, there is a plastic insert in the housing. With plastic, even complicated geometries can be manufactured easily and inexpensively.

In a particularly simple embodiment, the adjusting disc is moved by means of an adjusting handle.

Alternatively, the adjusting disc can be rotated using a motor.

It is particularly advantageous in the embodiment of the invention with an adjusting handle if the handle can be removed in the bypass position and is locked in the operating position. This means that accidental opening is not possible without a connected water treatment device. In the operating position, however, it is possible to switch to the bypass position quickly and easily at any time in an emergency and thus disconnect a connected water treatment device from the pipe network.

A preferred embodiment has an adjusting handle with an additional integrated wrench for loosening the connected water treatment device. This wrench can only be used in the bypass position.

In another variant, the adjusting handle is permanently mounted to prevent it from becoming misplaced.

In order to prevent unauthorized adjustment of the bypass valve, in one embodiment of the device according to the invention the control lever can only be used when necessary.

A particularly preferred embodiment is one in which a bayonet connection is integrated for easy installation of a water treatment device. The water treatment device can be hung in here and then screwed tight without the device having to be supported until it is firmly screwed in. Such a bayonet connection is known per se, for example, from DE 195 29 189 C2.

Further advantages of the invention emerge from the description and the drawing. Likewise, the features mentioned above and those listed below can be used according to the invention individually or in combination. The embodiments shown and described are not intended to be exhaustive.

enumeration, but rather have exemplary character for the description of the invention.

The invention is illustrated in the drawing and is explained in more detail using an embodiment. They show:

Fig. 1A is a front view of a connector with flanged intermediate connector in bypass position;

Fig. 1B is a longitudinal section through Fig. 1A in direction 0-0;

Fig. 2A is a front view of a connector with flanged connecting intermediate piece in operating position;

Fig. 2B is a longitudinal section through Fig. 2A in the direction 0-0; and Fig. 3 is an adjusting disc.

An advantageous embodiment of the invention is shown in Figures 1 to 3:

This embodiment comprises a connector (1) and a connecting intermediate piece (2) flanged to it. The connector (1) has an inlet-side connection (3) and an outlet-side connection (4), which are used to install the connector in a line (5). A line section (6) is connected to the inlet-side connection (3), which, after being deflected by 90°, opens centrally into a lateral flange (7). A line section (8) connected to the outlet-side connection (4) forms an annular channel concentric with the line section (6), which also opens into the lateral flange (7).

The connecting intermediate piece (2) has a counter flange (9) corresponding to the lateral flange (7), in the surface of which a central channel

(10) and an annular channel (11) surrounding the central channel (10). The two flanges (7) and (9) are tightly connected to one another by means of screws and nuts with a seal in between. The central channel (10) is connected to a central channel (12) which leads to the water treatment device. The annular channel (11) is connected to an annular channel (13) which is connected to a channel leading away from the water treatment device. The axes of the two central channels (10,12) leading to the water treatment device and the axes of the annular channels (11,13) are perpendicular to the pipe string (5) if no further intermediate piece is used.

In the bypass position (Fig. 1A and 1B), the two central channels (10) and (12) and the two ring channels (11) and (13) are each separated from one another by means of an adjusting disc (14). The central channel (10) is short-circuited with the ring channel (11) using the housing insert (15). The water treatment device is thus separated from the pipe line (5) without the water flow in the pipe line (5) being interrupted. The direction of flow of the water is shown schematically in Fig. 1B.

In the operating position (Fig. 2A and 2B), the adjusting disc (14) closes the direct connection of the central channel (10) to the ring channel (11). Water then flows via the central channels (10) and (12) into the water treatment device and from the water treatment device back via the ring channels (13) and

(11) into the pipe string (5). The flow direction of the water is shown schematically in Fig. 2B.

A change between the operating position and bypass position can be carried out easily and without any effort against the applied water pressure using the connecting intermediate piece according to the invention.

In a preferred embodiment, the adjusting disk (14) is divided into six segments of 60° each. This results in an adjusting angle of 60°. Every second segment (16) is closed. In the bypass position, the closed segments (16) interrupt the central channels (10) and (12) to the water treatment device as well as the ring channels (11) and (13). The open segments (17) each contain a central opening (18) and a peripheral opening (19). In the operating position, the central opening (18) connects the central channels (10) and (12) to the water treatment device, the peripheral opening (19) connects the ring channels (13) and (11) flowing away from the water treatment device.

In another variant, the adjusting disc (14) is divided into more or less than six segments.

The adjusting disc is rotated into the operating position or the bypass position by means of an adjusting handle (20). In a preferred embodiment of the invention, the adjusting handle (20) in the bypass position can be removed for safety purposes. In addition, by removing the adjusting handle (20) in the bypass position, the connected water treatment device can be safely disconnected from the pipe network without interrupting the water supply to the consumer. This may be necessary for maintenance or repair work as well as for assembling and disassembling the water treatment device.

Above and below the adjusting disc (14) there are two sealing sliding discs (21), which enable low-friction rotation of the adjusting disc (14), as well as a segment seal (22).

Sealing disks (21) made of polytetrafluoroethylene (Teflon) are particularly advantageous, the adjusting disk (14) is preferably made of plastic such as polyoxymethylene.

In a further preferred embodiment, the adjusting disc (14) consists of a metallic material with a polytetrafluoroethylene coating.

The housing (23) preferably consists of a metallic material such as brass, the housing insert (15) of an easily moldable plastic.

The outer housing (23) is connected to the cover (24) by means of screws (25).

In a preferred arrangement, a bayonet connection (26) is located on the connecting piece, which allows easy installation of a water treatment device
enabled.

Claims (12)

1. Connection intermediate piece for attaching a water treatment device to the pipeline of a water network, in particular a domestic water network, which has a flange for connecting the connection intermediate piece to the pipeline, in particular to a connection piece installed in the pipeline, and a further flange for connecting the water treatment device with a matching counter flange, wherein the connection intermediate piece has channels that connect the pipeline of the water network to the water treatment device, characterized in that an adjusting disk ( 14 ) that can be rotated in at least two positions is provided in the connection intermediate piece ( 2 ), through which the flow is essentially perpendicular to the plane of the disk, wherein the adjusting disk ( 14 ) in one position (= operating position) connects central channels ( 10 , 12 ) leading to the water treatment device and ring channels ( 11 , 13 ) leading away from the water treatment device to one another, and in another position (= bypass position) connects a central channel ( 10 ) to a ring channel ( 11 ) and at the same time separates the central channels ( 10 , 12 ) and the ring channels ( 11 , 13 ) from each other. 2. Connecting intermediate piece according to claim 1, characterized in that the adjusting disc ( 14 ) is divided into preferably equally sized segments ( 16 , 17 ) which are alternately closed ( 16 ) and opened ( 17 ). 3. Connecting intermediate piece according to claim 2, characterized in that the adjusting disc ( 14 ) is divided into six segments of 60° each, so that an adjusting angle of 60° results when closing or opening alternately. 4. Connecting intermediate piece according to claim 2 or 3, characterized in that the open segments ( 17 ) each contain a central opening ( 18 ) and a peripheral opening ( 19 ). 5. Connecting intermediate piece according to one of the preceding claims, characterized in that the adjusting disc ( 14 ) can be rotated by means of an adjusting handle ( 20 ). 6. Connecting intermediate piece according to claim 5, characterized in that the adjusting handle ( 20 ) is removable in the bypass position. 7. Connecting intermediate piece according to claim 6, characterized in that the adjusting handle ( 20 ) contains an integrated wrench for mounting the water treatment device. 8. Connecting intermediate piece according to one of claims 1 to 4, characterized in that a motor is provided with which the adjusting disc ( 14 ) can be rotated. 9. Connecting intermediate piece according to one of the preceding claims, characterized in that the adjusting disc ( 14 ) is located between two sealing sliding discs ( 21 ), in particular made of polytetrafluoroethylene (= Teflon®), for low-friction rotation. 10. Connecting intermediate piece according to one of claims 1 to 8, characterized in that the adjusting disc ( 14 ) is constructed from a metallic material with a sliding coating, in particular with a coating of polytetrafluoroethylene (= Teflon®). 11. Connection intermediate piece according to one of the preceding claims, characterized in that an outer housing ( 23 ) and a cover ( 24 ) made of a metallic material such as brass and a housing insert ( 15 ) made of plastic are provided. 12. Connecting intermediate piece according to one of the preceding claims, characterized in that a bayonet connection ( 26 ) is provided on the connecting intermediate piece ( 2 ).