EP2447424A1 - Pipe branch section for downpipes - Google Patents

Abstract

The piece (1) has a deflection section (4) attached to an upper downpipe section (2). A supply section (7) opens into the piece in a region of the deflection section. The deflection section has a deflection region (8) for deflecting sewage with respect to a drop direction (F) and another deflection region (9) successively arranged with respect to the former deflection region in the drop direction. The latter deflection region runs inclined to the drop direction, where the sewage is fed from the former deflection region to the latter region.

Description

The present invention relates to a branch line for downpipes according to the preamble of claim 1.

STATE OF THE ART

From the prior art, such a branch line piece is known. For example, the shows CH 418 067 is such a branch line piece.

The applicant also distributes a branch line under the name Geberit Sovent, which is a fitting which provides a cost-effective and sophisticated solution for the supply of waste water to wastewater sewer lines in multi-storey buildings, such as high-rise buildings.

The use of the product Geberit Sovent and also of branch pieces according to the CH 418 067 has led to very good results. However, in the meantime, the requirements with regard to discharge capacity, drop height and also the size of such pipe sections have increased.

In particular, a negative pressure in the supply line during operation should be largely prevented. The negative pressure is created by the water flowing in the downpipe and can become so great, especially in the case of large drop heights, that water is sucked out of the siphons present in the supply line. Consequently, the siphon no longer fulfills the function as a closure element between downpipe and the corresponding waste water drains, such as toilet drain etc.

The formation of the negative pressure can be reduced, for example, by arranging braking elements or guide elements which brake or redirect the water flowing in the direction of the fall in the region of the supply line. However, this has a negative effect on the power or the volume flow of the branch line piece, which means that line branch pieces with larger pipe diameters must be used in order to achieve a comparable performance. This is again undesirable, since so greater installation space is required.

PRESENTATION OF THE INVENTION

Based on this prior art, the invention has for its object to provide a line branch piece, which overcomes the disadvantages of the prior art. In particular, a line branch piece is to be created whose power is increased while maintaining the same size and whose performance is kept constant at a reduced size.

Such a problem is solved by the branched line piece according to claim 1. Accordingly, a line branch piece for a downpipe, in which wastewater in the form of a water jacket on a wall along a direction of fall is feasible, an upper downcomer section with an inlet opening, a subsequent to the upper downcomer section deflecting section and a subsequent the deflecting lower downcomer section with an outlet opening , And at least one supply line section, which opens in the region of the deflection in the line branch piece. The deflection section comprises a first deflection region, which deflects the wastewater with respect to the direction of fall, and a second deflection region arranged downstream of the first deflection region viewed in the direction of fall, to which the wastewater is supplied from the first deflection region. The second deflection region is inclined to the direction of fall. Due to this tendency, the wastewater can be sufficiently braked without increasing the resistance of the branch line piece, which allows an increase in the volume flow with the same size or keeps the performance constant with a smaller size.

Preferably, the second deflection region is so to the first deflection that the

Wastewater is substantially reflected by the second deflection region. Due to the reflection, the effect of the inclined deflection region is further improved.

The second deflection region is preferably provided by the wall of the line branch piece. This allows a particularly simple production.

Preferably, the second deflection region is at an angle in the range of 2 to 12 ° to the direction of fall.

The second deflection region is at an angle in the range of 30 ° to 50 °, in particular 40 ° with respect to the direction of the waste water, which has been deflected by the first deflection region. With such an angle very good results were achieved.

Preferably, the first deflection region is arranged such that the water jacket leaves the first deflection region as a deflected jet, wherein the wastewater then impinges jet-shaped onto the second deflection region arranged inclined at an angle.

The second deflection region is preferably curved at least in sections, in particular around an axis which is perpendicular to the direction of fall. As a result, the deflection can be further improved.

Preferably, the first deflection region is seen in the direction of fall arranged so that it extends over the entire clear width of the upper downcomer section, so that the total amount of wastewater is deflected.

The diverting section preferably comprises a flow-through region and a mouth region in which the feed line opens into the line branch piece, wherein the mouth region is separated from the flow region by a dividing wall, so that the entry of waste water from the flow region into the mouth region is prevented.

The first deflection region preferably comprises a detachment edge, which is arranged in such a way that the wastewater flows over the mouth region or over the dividing wall flows away. This arrangement prevents the entry of sewage into the mouth area.

Preferably, the partition has a passage through which pressure differences between the flow area and the mouth area are compensated, wherein the passage is preferably arranged such that a passage of waste water through the passage is made impossible. As a result, pressure differences in the system can be well compensated.

Preferably, a flow divider is arranged in the direction of fall in front of the deflection section, wherein the water jacket can be torn off with the flow divider.

The line branch piece preferably comprises at least one bypass line, which is preferably arranged such that a pressure difference between the upper downcomer section and the mouth region and / or between the upper downcomer section and the lower downcomer section can be compensated.

Further embodiments are given in the dependent claims.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1

eine Schnittdarstellung eines Leitungszweigstückes gemäss einer ersten Ausführungsform der vorliegenden Erfindung;

Fig. 2

eine Schnittdarstellung des Leitungszweigstückes nach Figur 1 mit einem Strömungsteiler und einer Bypassleitung nach einer zweiten Ausführungsform; und

Fig. 3

eine Schnittdarstellung des Leitungszweigstückes nach Figur 1 mit einem Strömungsteiler und einer Bypassleitung nach einer dritten Ausführungsform.

Preferred embodiments of the invention are described below with reference to the drawing, which serve only for explanation and are not to be interpreted as limiting. In the drawing show:

Fig. 1

a sectional view of a line branch piece according to a first embodiment of the present invention;

Fig. 2

a sectional view of the line branch piece after FIG. 1 with a flow divider and a bypass line according to a second embodiment; and

Fig. 3

a sectional view of the line branch piece after FIG. 1 with a flow divider and a bypass line according to a third embodiment.

The FIG. 1 shows a branch line 1 for use in wastewater sewer pipes in multi-storey buildings. The line branch piece 1 is used for the connection of a waste water supply line from a floor in the downpipe, which extends from floor to floor, usually over the entire building height. The supply line is therefore connected via the branch line piece 1 with the down pipe.

The line branch piece 1 comprises an upper downcomer section 2 with an inlet opening 3, a deflecting section 4 adjoining the upper downcomer section 2 and a lower downpipe section 5 adjoining the deflecting section 4 with an outlet opening 6, and at least one inlet section 7 via which additional wastewater is introduced into the downpipe becomes. The upper downcomer section 2, the deflecting section 4 and the lower downcomer section 5 are surrounded by a wall 11, 20. The upper downcomer portion 2 of the line branch piece 1 is connected to an upper downpipe, not shown here, and the lower downcomer portion 5 is connected to a lower downpipe, also not shown here. The supply line section 7 communicates with the drains of, for example, a dwelling in a multi-storey building in connection and is sealed there via a siphon to the line system out, as explained above. The connection between the pipe section 1 and the downpipe or the supply line is preferably via a material connection, such as a welded connection.

The drop lines are arranged so that their central axis V lies in the vertical. Consequently, the waste water flows in the vertical V along a fall direction F and forms a circumferential cylindrical water film or water jacket W on the wall 20 of the downpipe or in the downcomer sections 2, 3. In this connection, it should be mentioned that waste water, which is substantially composed of water and solids, does not differ significantly from water in terms of flow effects.

In the central area of the downpipe is an air column L, which is located in the downpipe extends between two line branch pieces 1. Due to the flow of the water jacket W, the air column L is placed in pulsating motion, with too high a pulsation has a negative effect on the efficiency of the line branch piece 1.

The diameter of the down pipe is to be dimensioned so that at the maximum volume flow, the water drains off as water jacket W, wherein the air column L is present. If the volume flow is so great that the entire cross section of the downpipe is used for its routing, so the risk of backflow through the supply line 7 and / or a stowage over the branch line piece 1 is very large.

The wastewater is introduced from the upper downcomer via the inlet opening 3 into the branch pipe 1 along the fall direction F, which corresponds substantially to the vertical V, introduced. The wastewater passes through the upper downcomer section 2 and is deflected by the deflecting section 4 according to the description below. In the region of the deflection section 4 additional wastewater is introduced into the downpipe via the supply line section 7. After passing through the deflecting section 4, the deflected wastewater mixes with the additional wastewater and leaves the line branch piece 1 via the lower downcomer section 5 and the outlet opening 5 to the lower downcomer. Due to the flow characteristics, a water jacket W and an air column L are then created in the lower down pipe as soon as the water has traveled a certain distance.

In order to brake the flow velocity of the water in the supply line 7, and also to limit the formation of a negative pressure in the supply line 7, so that a drainage of the supply line 7 and the subsequent siphon is prevented, serves the deflection section 4. The deflection 4 here comprises a first deflection region 8, which diverts the wastewater W from the fall direction F. Next, a second deflection region 9 is arranged, which is at an angle or inclined to the direction of fall F and to the vertical V. The wastewater is diverted from the first deflection region 8 so that it is deflected to the second deflection region 9, where the wastewater undergoes a renewed deflection. Preferably, the second deflection region 9 is arranged in the direction of fall immediately after the first deflection region 8. Under the Dictation is directly to understand that the wastewater from the first deflection region 8 is passed directly to the second deflection region 9. The second deflection region 9 is inclined from the vertical V to the first deflection region 8 towards.

In principle, a large deceleration of the wastewater is to be achieved via the deflection section 4 in order to keep the negative pressure in the supply line related to the flow rate of the water as small as possible. At the same time, however, the resistance of the line branch piece 1 should not be increased to the extent that it comes in the region of the deflection 4 to a stagnation of the wastewater, which minimizes the power or efficiency of the line branch piece 1 very strong. In other words, a high resistance, which would also cause a good or strong braking of the wastewater, must be compensated by increasing the diameter of the pipeline in order to achieve a comparable volume flow or a comparable performance. However, this is disadvantageous in terms of size. In order to prevent this negative effect, the two-fold deflection was chosen, wherein the resistance is only slightly increased over the branch line piece 1, without the braking of the waste water is adversely affected.

The first deflection region 8 opposes with respect to the direction of fall F or the vertical V at an angle β of preferably 45 °. In other embodiments, the angle β may also be less than or greater than 45 °, for example in the range of 30 ° to 60 °, in particular in the range of 40 ° to 50 °. As a result of this first deflection, the wastewater is strongly braked and diverted in the direction of the second deflection region 9.

Preferably, the first deflection region 8 is seen in the direction of fall F arranged such that it extends over the entire inside width of the upper downcomer section 2, so that the total amount of waste water impinges on the first deflection region 8. In other words, this means that the first deflection region 8 extends over the entire cross section of the upper downcomer section 2. As a result, the first deflection region 8 causes the formation of a jet S from the water film W. Consequently, the wastewater in the form of the jet S strikes the second deflection region 9.

The second deflection region 9, which is arranged at an angle α to the direction of fall F or to the vertical V, stands in such a way to the beam S that the beam S impinging on the second deflection region 9 is reflected as optimally as possible. In the present case, the expression reflection is understood that the beam S at the similar angle as it impinges on the second deflection region 9, this leaves again, but at least by the second deflection region 9 is deflected so that the pressure loss and thus the resistance by the deflection remains as small as possible. As a result, the power, ie the maximum volume flow, can be increased while braking remains constant, wherein the flow-induced negative pressure in the supply lines 7 is not changed.

Preferably, the angle α is in the range of 2 ° to 12 ° with respect to the vertical V. The angle α is chosen so as to ensure optimum reflection of the water on the inside of the wall 11. In terms of the angle β, it is preferable that the water jet S impinges on the second deflection region 9 at an angle δ of 30 ° to 50 °, in particular 40 °. The angle δ defines itself as an angle between the direction in which the beam S leaves the first deflection region 8 and the inclination of the second deflection region 9.

The second deflection region 9 can be curved in different directions in order to further improve the reflection of the wastewater. For example, it is conceivable to provide a curvature 10 about an axis perpendicular to the vertical V, as shown in the figures.

In summary, it can be stated that the deflection section 4 is designed such that it opposes a low resistance with respect to the wastewater without negatively influencing the braking of the water. As a result, a larger volume flow can be achieved with a constant size, which increases the performance of the line branch piece 1 accordingly.

The degree of the first deflection is greater than the degree of the second deflection. Consequently, the water undergoes a greater loss of speed over the first deflection region 8 than over the second deflection region 9. This division has the The advantage is that the system functions more consistently with respect to different volume flows, and that the system can be better adjusted.

Preferably, the second deflection region 9 is formed by the wall 11 of the line branch piece 1. Alternatively, the second deflection region 9 can also be a separate element in the line branch piece 2.

The at least one supply line section 7 is arranged so that it opens into the line branch piece 1 substantially at the level of the second deflection region 8. In the present embodiment, a total of six supply line sections 7 are available. In this case, three supply line sections 7 are arranged with a large diameter and three further supply line sections 7 with a smaller diameter each T-shaped, wherein the supply line sections 7 are arranged at an angle of 90 ° to each other. The group lead portions 7 with the large diameter are preferably arranged in the direction of fall F over the group inlet portions 7 arranged with the small diameter.

In the FIG. 1 can be further recognized that the deflection section 4 is divided into a flow area 12 and an orifice area 13. The flow area 12 is used for the above-described deflection of the flowing through the line branch piece 1 wastewater, while the mouth area 13 serves to receive the supplied via the supply line sections 7 wastewater. The mouth region 13 is separated from the flow region 12 by a partition wall 14, so that the entry of flowing waste water from the flow region 12 into the mouth region 13 is prevented. The partition wall 14 is arranged at an angle to the direction of fall F, so that the partition has as little influence as possible on the flowing waste water, that is, the cross section of the flow area 12 in the region of the second deflection region 9 is not unnecessarily reduced. In a region 21 facing the lower downflow section 5, the dividing wall 14 can come into contact with the wastewater, in particular in the case of large volume flows, and thus act as a guide element.

In connection with the partition wall 14, it should also be noted that the first deflection region 8 comprises a detachment edge 15, which is arranged such that the Wastewater flows over the partition wall 14 away.

Between the first deflection region 8 and the partition wall 14, it is also possible to arrange an optional ventilation passage 16 in the partition wall 14, wherein an air pressure equalization between the flow area 12 and the mouth region 13 can take place, which is represented by the arrows 17. With this pressure compensation, a flow-induced pressure pulsation in the system is prevented or greatly reduced, so that the risk of the formation of the negative pressure in the supply lines 7 is further reduced. The preferred arrangement of the vent passage 16 directly below the first deflection region 8 has the advantage that the flowing wastewater can not flow through the vent passage 16 into the mouth region 13.

In the Figures 2 and 3 1 'and 1 "according to the second and third embodiments, the line branch piece 1' or 1" also comprises a flow divider 18 which, viewed in the direction of fall F, is located in front of the deflection section 4, here in the upper downflow section 2 opposite to the first one Turning 8, is arranged. Such a flow divider 18 can also be applied to the embodiment of the FIG. 1 Arrange. With the flow divider 18, the water jacket W or the film flow along the wall 20 of the upper downcomer section 2 can be torn open before the wastewater strikes the first deflection region 8. The flow divider 18 thus has the advantage that the jet S is deflected with a lower resistance. Next, the flow divider 18 also has the advantage that the disruption of the film flow, the pulsation of the air column L and thus the resulting pressure differences in the branch line piece can be reduced.

Further, the line branch piece 1 'and 1 "in the Figures 2 and 3 comprise bypass line 19 shown. Such a bypass line 19 serves to equalize air pressure differences between the corresponding points. The bypass line 19 is arranged such that the penetration of waste water into the bypass line 19 is impossible. In the Figures 2 and 3 is the bypass line 19, seen in the direction of fall F, arranged behind the flow divider 18. Alternatively, the bypass line 19 may also be arranged so that it projects into the air column L of the upper downcomer section 2.

In the FIG. 2 connects the bypass line 19, the air region of the upper downcomer section 2 and the mouth portion 13 of the deflection section 4, whereby the corresponding pressure difference can be compensated. In the FIG. 3 connects the bypass line 19, the air region of the upper downcomer section 2 and the lower downcomer section 5, so the corresponding pressure difference can be compensated.

It is also conceivable that a bypass line is arranged which connects the air region of the upper downcomer section 2 with the mouth region 13 of the deflecting section 4 and with the air region of the lower downcomer section 5.

The adjustment of the pressure difference has the advantage that large differences in pressure at the various points by permanent compensation can not even arise.

It should be noted at this point that the flow divider 18 and the bypass line 19 can be used independently of each other. For example, it would be conceivable to use only the flow divider 18 or only the bypass line 19.

The line branch piece is preferably made of a plastic by means of a plastic bubble process.

LIST OF REFERENCE NUMBERS

1, 1 ', 1 "

Leg piece

2

upper downpipe section

3

inlet opening

4

deflecting

5

lower downpipe section

6

outlet opening

7

lead portion

8th

first deflection area

9

second deflection area

10

curvature

11

wall

12

Flow range

13

mouth area

14

partition wall

15

removal edge

16

Vent passage

17

pressure equalization

18

flow divider

19

bypass line

20

wall

21

lower area

F

falling direction

L

air column

S

beam

V

vertical

W

water jacket

α

Angle second deflection

β

Angle first deflection

δ

angle

Claims (13)

Conduit branch (1, 1 ', 1 ") for a downpipe, in which waste water in the form of a water jacket (W) on a wall (11, 20) along a fall direction (F) can be guided, comprising an upper downcomer portion (2) an inlet opening (3), a deflecting section (4) adjoining the upper downpipe section (2) and a lower downpipe section (5) adjoining the deflecting section (4) with an outlet opening (6) and at least one inlet section (7) located in the Area of the deflection section (4) in the line branch piece (1, 1 ', 1 ") opens, wherein the deflection section (4) has a first deflection region (8), which deflects the waste water with respect to the falling direction (F), and with respect to the first deflection region (8) seen in the direction of fall (F) arranged downstream second deflection region (9), to which the waste water from the first deflection region (8) is fed, characterized in that the second deflection region inclined to Fallri (F) runs. A line branch piece according to claim 1, characterized in that the second deflection region (9) is so to the first deflection region (8), that the waste water is substantially reflected by the second deflection region (9). Line branch piece according to claim 1 or 2, characterized in that the second deflection region (9) through the wall (11) of the line branch piece (1, 1 ', 1 ") is provided. Line branch piece according to one of the preceding claims, characterized in that the second deflection region (9) is at an angle (α) in the range of 2 to 12 ° to the direction of fall (F). A line branch piece according to one of the preceding claims, characterized in that the second deflection region (9) with respect to the direction of the waste water (S), which was deflected by the first deflection region (8) at an angle (δ) in the range of 30 ° to 50 ° , in particular 40 °, stands. A line branch piece according to any one of the preceding claims, characterized in that the first deflection region (8) is arranged such that the water jacket (W) leaves the first deflection region (8) as a deflected jet (S), the wastewater then being angled in a jet shape to the inclined one arranged second deflecting region (8) impinges. Line branch piece according to one of the preceding claims, characterized in that the second deflection region (9) is curved at least in sections, in particular about an axis which is perpendicular to the direction of fall (F). Line branch piece according to one of the preceding claims, characterized in that the first deflection region (8) in the direction of fall (F) is arranged such that it extends over the entire inside width of the upper downcomer portion (2), so that the total amount of wastewater is deflected , A line branch piece according to any one of the preceding claims, characterized in that the deflection section (4) comprises a flow region (12) and an orifice region (13), in which the supply line via the supply line section (7) in the line branch piece (1) opens, said Mouth region (13) by a partition wall (14) is separated from the flow area (12), so that an entry of waste water from the flow area (12) in the mouth region (13) is prevented. A line branch piece according to one of the preceding claims, characterized in that the first deflection region (8) comprises a detachment edge (15), which is arranged such that the waste water flows over the mouth region (13) or over the dividing wall (14). Conduit branch piece according to one of the preceding claims, characterized in that the partition wall (14) has a passage (16) over which pressure differences between the flow area (12) and the mouth region (13) are compensated, wherein the passage (16) is preferably arranged in that a passage of waste water through the passage (16) is made impossible. Conduit branch piece according to one of the preceding claims, characterized in that a flow divider (18) in the direction of fall (F) seen in front of the deflection section (4) is arranged, with the flow divider (18) of the water jacket (W) can be torn open. A branch line piece according to one of the preceding claims, characterized in that the line branch piece (1, 1 ', 1 ") comprises at least one bypass line (19), which is preferably arranged such that a pressure difference between the upper drop line section (2) and the mouth area (2). 13) and / or between the upper downcomer portion (2) and the lower downcomer portion (6) is compensated.

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