AU2015270716B2

AU2015270716B2 - Deflecting bend

Info

Publication number: AU2015270716B2
Application number: AU2015270716A
Authority: AU
Inventors: Abdullah Oengoren; Rolf Weiss
Original assignee: Geberit International AG
Current assignee: Geberit International AG
Priority date: 2014-06-05
Filing date: 2015-05-29
Publication date: 2019-01-03
Anticipated expiration: 2035-05-29
Also published as: EP2952752B1; RU2016150979A; RS60566B1; RU2690546C2; IL248871A0; CN106461145A; IL248871B; EP2952752A1; WO2015185460A1; DK2952752T3; CN106461145B; RU2016150979A3; AU2015270716A1

Abstract

A deflecting bend (1) for a downpipe (2) for removing a multi-phase flow medium (S), in particular consisting of water, solids and air, comprises a first pipe section (3) which extends along a first centre axis (M1), a curved section (4) which adjoins this first pipe section (3) and extends along a curved centre line (M) with a curved outer side (5) and a curved inner side (6), and a second pipe section (7) which adjoins the curved section (4) and extends along a second centre axis (M2). A guide element (8) arranged on the inner side of the curved outer side (5) modifies the cross-sectional shape of the curved section (4) in such a way that a movement of the flow medium (S), in particular the water and the solids, transversely to the flow direction can be suppressed, in particular prevented.

Description

TITLE

Deflecting bend

TECHNICAL FIELD

The present invention relates to a deflecting bend for a downpipe according to the preamble of claim 1.

PRIOR ART

Downpipes serve for the evacuation of wastewater and are arranged in buildings such that they generally run in the vertical. In many downpipes there are also 15 sections, however, which run in the horizontal or slightly inclined to the horizontal, for instance at an angle of a few degrees. For the deflection from the vertical into the horizontal, the vertically running section is connected to the horizontally running 2.0 section by a deflecting bend.

A deflecting bend of this type has become known, for instance, from EP 1 882 786.

The transition between a vertically running section and a horizontally running section is here preferably configured such that the wastewater is deflected with as little loss as possible. As a result, the wastewater passes still with great energy into the horizontally 30 running section, so that the wastewater can as far as possible flow over a large distance through the horizontally running· section. In practice, there has

	been -m · - I i η i L1U	ally	move to providing two	45° bends which are pipe piece. Here, one
connected	by a straight
35	WctS	able	to reduce	the hydraulic:	losses. This solution
	has	the	drawback, 1	towever, th at	a lot of installation
	spac	e 1 s	required.

REPRESENTATION OF THE INVENTION

WO 2015/185460

PCT/EP2015/062023

Starting	from th	is pr	ior art, an	object of	^: t‘ ho
invention	_L S	t o d?	efine	a de f 1 e c t i n g	bend which	keeps
the flow	loss	cL S	small	as possible.	In particul	3.1.' _f cl

good flush-out performance is intended to be achieved.

	A f u r t h e r o b j e c t which the spatial	is to define a deflect: requirements are smaller.	i.ng bend	f o r
	T h i s o b j e c t. i s	achieved by the subject	of claim	1 .
10	According to this	, a deflecting bend for a	downpipe	for
	the discharge	of a multiphase flow	medium,	in

particular consisting of water, solids and air, comprises a first pipe section, which extends along a first center axis, a curved section adjoining this 15 first pipe section and having a curve outer side and a curve inner side, and a second pipe section, adjoining the curved section and extending along a second center axis. The curved section extends along a curved center line. In addition, the deflecting bend comprises a 2.0 guide element, which is arranged, on the inside or on the inside of the pipe, on the curve outer side, and by which the cross-sectional shape of the curved section is altered such that a movement of the flow medium, in particular of the water and of the solids, transversely 25 to the flow direction is suppressible, in particular preventable. The guide element is disposed in the interior of the deflecting bend and comes into contact with the flow medium..

As a result of the guide element, slopping of the flow medium along the pipe direction is prevented,

	deflecting	bend,	and
	performance,	can	be
35	connected to	the	second

horizontal can thus be the deflecting bend ca wall transversely to the flow whereby the performance of the thus also the flush-out improved. Hence a pipeline pipe section and lying in the configured longer. Furthermore, i be configured with a tighter radius, whereby performance is improved. The ideal

WO 2015/185460

PCT/EP2015/062023 deflection ensures, moreover, that the air can circulate freely alongside the water and can compensate any pressure potentials. As a result, a recirculation line, for instance, can be omitted.

The guide element is disposed solely on the curve outer

	side and not	on the	curve	inner	sid	e. The curve o	uter
	side is that	s i de o f	the	curved	sec	tion which has	τ^- H
	1 a r a e s t c u r v e	radius,	and	the cu	rve	inner side is	that
10	side of the c	urved se	ct ion	which	has	the smallest c	urve

radius

The second center axis is inclined at an angle to the first center axis. The angle between the first and the second center axis is preferredly greater than 90°. Particularly preferredly, the angle lies within the rance from 91° to 95°.

In a first preferred embodiment, the guide element is

2.0 at least one guide wall disposed in the region of the curved section, wherein the guide wall is oriented substantially in the flow direction. The guide wall extends into the cross section of the curved section and provides in the region of the curve outer side an obstacle for the flow medium against said transverse movement.

Preferably, the guide element or the guide wall extends fully over the curved section. That is to say that the 30 guide element or the guide wall substantially has a length which corresponds to that of the curved section. Alternatively, the guide element or the guide wall extends partially over the curved section.

Regardless of the length of the guide element or of the guide wall within the curved section, the guide element or the guide wall can extend into one or both pipe the guide element sections. Particularly preferredly

WO 2015/185460

PCT/EP2015/062023 or the guide wall is arranged such that this extends from the curved section into the second curved section.

Particularly preferredly, precisely two of said guide walls are arranged at a distance to one another. The flow medium is then guided between the two guide walls or flows around the two guide walls.

Preferably, the two guide walls, viewed in the flow 10 direction, have an inlet region in which the distance between the guide walls, viewed in the flow direction, is narrowed. The inlet region can thus be configured in a fluidically optimized manner, so that the inlet, in particular between the two guide walls, has a low 15 hydraulic resistance.

The two guide walls preferredly have a guide region in which the distance between the guide walls is constant. The guide region preferably adjoins said inlet region.

2.0

The two guide walls preferredly have an outlet region in which the distance to one another, viewed in the flow direction, is enlarged. As a result of this configuration of the outlet region, its hydraulic 25 resistance can likewise be lowered. The outlet region preferredly adjoins the guide region.

In a particularly preferred embodiment, the two mutually spaced guide walls embrace said inlet region, 30 which is followed by said guide region. The guide region is then adjoined by said outlet region.

The at least one guide wall lies at least in some sections, in particular in the guide region, parallel 35 to a plane which runs through the first center axis and the second center axis.

WO 2015/185460

PCT/EP2015/062023

Particularly preferredly, the guide wall is provided by an indentation from outside in the region of the curve outer side. The indentation lies preferably on both sides of a plane which runs through the first center 5 axis and the second center axis.

Particularly preferredly, said mutually spaced guide walls form a channel, wherein the channel has a channel bottom from which the guide walls extend in the 10 direction of the curve inner side. The channel, is open opposite the channel bottom, in the direction of the curve inner side. Viewed with respect to the pipe inner side of the bend section, the channel extends outward with the two mutually spaced guide walls.

Preferably, the channel depth increases over the length of the channel, viewed in the flow’ direction, in an inlet region. In an outlet region, the channel depth diminishes, viewed in the flow direction. The channel 2.0 depth preferably corresponds to 10% to 50-% of the pipe diameter. Particularly preferredly, the channel depth corresponds to about 35% of the pipe diameter. Given an illustrative pipe diameter of 100 mm, the channel depth thus lies within the range from. 10 mm. to 5 0 mm, 25 particularly preferredly around 35 mm.

Preferably, the channel cross-sectional area diminishes, viewed in the flow direction, in an inlet, region, and increases, in the flow direction, in the 30 outlet region.

Particularly preferredly, the channel depth and/or the channel cross section are in a guide region, in particular between inlet region and outlet region, 35 constant.

Preferably, the channel bottom, viewed in the cross section to the center line of the curved section.

WO 2015/185460

PCT/EP2015/062023 concavely curved configuration. The radius of said concave curvature is preferably larger than the radius of the opposite wall of the curve inner side.

In another embodiment, the guide element is a plurality of guideways arranged at a distance to one another within the curved section on the curve outer side. The guideways are oriented in the flow direction.

Preferably, the guideways extend fully or partially over the curved section.

	In a	preferred	embodiment of all embodiments,	the
	curved	section i	s configured on the curve inner	s i de
15	with 3	l widening.	with which widening any chang	e in
	cross	section	due to the guide element	is

compensatable .

Particularly preferredly, the cross-sectional area at

2.0 right angles to the center line of the deflecting bend is constant over the entire length of the deflecting bend.

Particularly preferredly, the first pipe section and/or 25 the second pipe section have a circular-cylindrical cross section.

Preferably, the center line of the curved section has a variable radius, wherein the radius continuously 30 increases between the first pipe section and the second pipe section. Alternatively, the center line of the curved section has a constant radius.

The deflecting bend, i.e. the first pipe section, the 35 curved section and the second pipe section, as well as the guide element, are preferably configured in one piece. Particularly preferredly, the deflecting bend 1 is made of plastic.

WO 2015/185460

PCT/EP2015/062023

Particularly preferredly, in the first pipe section, on the inner side, is arranged a flow divider, which ruptures the film flow of the flow medium, in 5 particular of the water. It is hereby ensured that, the flow medium impinges on the guide element in a hydraulically positive manner.

Particularly preferredly, the flow divider is 10 configured as an elevation of the inner wall of the first pipe section.

Preferably, the flow divider is arranged opposite the curve outer side, so that the flow medium can be fed 15 from the curve inner side to the curve outer side, and to the guide element arranged there.

Preferably, the flow divider substantially has the shape of an inverted V or the top edge of a miter.

2.0

Preferably, the flow divider is formed onto a wall structure. Preferably, the flow divider has a radial thickness which substantially corresponds to the thickness of the film, flow, wherein this thickness is 25 preferably less than about 2 cm.

	Further embodiments claims <	are defined	in	the	dependent
3 0	BRIEF DESCRIPTION OF	THE DRAWINGS

Preferred embodiments of the invention are described below on the basis of the drawings, which serve merely for illustrative purposes and should not be interpreted 35 restrictively. In the drawings:

WO 2015/185460

PCT/EP2015/062023

2.0 tig tig fig tig tig •‘I snows

CL deflecting inventive without flow medium;

nersnective view bend ng deflecting according to the preceding figures;

sectional view through according to the preceding figures;

bend and to according to the with associated sectional representations

PREFERRED EMBODIMENTS

In figure 1, a deflecting bend 1 for a downpipe 2 for the discharge of a multiphase flow medium. S is shown.

Of the downpipe 2 is represented a small section in the upper region of the deflecting bend 1. The downpipe 2 is connected to the deflecting bend 1. By a multiphase flow medium S is understood a flow medium consisting, in particular, of water, solids and air. As shown in

figure 2, the flow	medium S	f 1 o w s	off in the	regio	n of
the downpipe 2, an	d at the	entry	into the	deflec	:t ing
band 1, as a wall	flow. The	water	and the s	o 1 i ds	flow
s u b s t a n t i a 11 y a 1 ο n g	the innei	~ w a .11	17 of the	downpi	pe 2
and in the middle	is forme	sd an	air core.	The	f 1 o w

direction is defined in figure 2 with F.

The deflecting bend comprises a first pipe section 3, which extends along a first center axis Ml, a curved

WO 2015/185460

PCT/EP2015/062023

2.0 section 4 adjoining having a curve section 4

The curved !, which runs outer side

-J section 7, and curve inner side along a curved

6, and

Uli and, viewed geometrically, axis Ml stands inclined atari axi s

M2 .

The angle axis M2

The first pipe section 3 is connected up to the downpipe 2 and the second pipe section o a discharge pipe. The downpipe to guide element 8 alters at

OI the curve outer side the ,-5 -F curved section 4 such that flow

Cl medium. S, in particular of

2 5	t r a. n s v e r s e 1 y	to	the flow	direction F
	P a r t i c u 1 a r 1 y	p;	referredly,	the guide
	configured su	ch	that a con	trolling of
	t r a n s v e r s e 1 y	to	the flow	direction i:
	other words,		a movemen	t of the
3 0	transversely	to	the center	line M of t

.1 S f\

S rhe curved section f 1 o w med i urn S prevention of d i r e c t i ο n, t h e h y d r a u .1 i c bend is diminished, which performance

WO 2015/185460

PCT/EP2015/062023

The guide element 8 is disposed on the curve outer side 5 in the interior 22, i.e. on the inside of the pipe, of the deflecting bend 1. The curve inner side 6 is configured in the interior 22, without special 5 arrangements, as a normal surface.

The deflecting bend 1, i.e. the first pipe section 3, the curved section 4 and the second pipe section 7, as well as the guide element 8, are preferably configured 10 in one piece. Particularly preferredly, the deflecting bend 1 is made of plastic.

The guide element 8 can be variously configured. In the figures, a guide element in the form of a guide wall 9 15 is shown. In an alternative embodiment (not shown), the guide element 8 comprises a plurality of guideways arranged at a distance to one another on the curve outer side 5. The guide element 8, in particular the guide wall 9 and the guideways, are oriented

2.0 substantially in the flow direction F. That is to say, the guide element 8 extends in the direction of the center line M which extends through the deflecting bend, in particular through the curved section 4.

2 5	On the	basis	of figures
	of the	guide	element 8
	In the	shown	embodiment

to 6, a preferred embodiment explained more closely.

a comprises another .

The arranged dt extend curved guide wall 9 substantially corresponds to the length of the curved section 4.

35	The guide	wall 9	can also	however extend at least
	partially 1	.nto the	first p.i	pe section 3 and/or the
	second pipe	section	7. In the	embodiment which is shown

WO 2015/185460

PCT/EP2015/062023 in the present case, the guide wall 9 extends into second pipe section 7.

As already explained above, the guide walls 9 are arranged at a distance to one another and form an interspace 23 or, as this is stated in greater detail below, a channel 13. The guide walls 9 have an inlet region 10, in which the cross section between the guide walls 9, viewed in the flow direction, is narrowed. It 10 is here a case of a fluidically optimized inlet region

10, the cross section of which between the guide walls decreases with increasing flow direction. Viewed in the flow direction F, following after the inlet region is a guide region 18, in which the guide walls 9 15 substantially have a constant distance to one another and run parallel to each other. The guide region 18 can also however be differently configured, in particular as far as the parallel course of the two guide walls 9 is concerned. The guide region 18 is adjoined by an 2.0 outlet region 11, which here adjoins the guide region

18. In the outlet region 11, the cross section between the guide walls 9, viewed in the flow direction F, is enlarged. It is here likewise a case of a fluidically optimized outlet region 11.

5

The guide walls 9 lie uniformly distanced to a plane E running through the first center axis Ml and through the second center axis M2. The plane E is represented in figures 3 and 4. The distance between the two guide 30 walls 9 to the plane E is here identical, so that a symmetrical guide element 8 consisting of the two guide walls 9 can be created. Particularly preferredly, the guide walls 9 stand parallel to the plane E.

35	The guide wall 9 or the	t w o	guide	walls 9 can	be
	variously confionred. For	η	n st. a nee,	it wouJ d	be
	conceivable that the guide	wa.l	.Is 9 ar	^-e inserted as	a

separate element into the curved section 4. In the

WO 2015/185460

PCT/EP2015/062023 figures is shown a particularly preferred embodiment, in which the guide wall 9 or the two guide walls 9 is/are provided by an indentation 12 from outside in the region of the curve outer side 5. This indentation

12 can be recognized particularly clearly in figure 6.

With respect to said plane E running through the first center axis Ml and through the second center axis M2, the indentation 12 is preferably disposed on both sides of the plane E, so that precisely two guide walls 9 can 10 be arranged. The indentation 12 has the advantage that a particularly preferred embodiment is created with respect to the manufacture, and the deflecting bend can be manufactured by a comparatively simple plastic blowing process or a plastic injection process.

On the basis of figure 7 with the sectional representations 7a to 7b, the arrangement of said guide walls 9 according to the preferred embodiment is nowexplained more closely.

2.0

	I n f i ς	jure	7a, whicl·	1 is the sectional r	ep r e s en t a t i ο n
	along	the	sectional	line A-A of figure	7, the inlet
	region	10 i	.s shown.	The guide walls 9 are	in the inlet
	region	10	f luidica.	lly optimized with	corresponding
2.5	inflow	shap	es, here i	31i gh 11y r o u n de d.

In figure 7b, which is the sectional representation

	along-	the sectional	. line B-B of	figure 7, is shown	CL
	first	part of the	guide region	18, which adjoins t	he
3 0	inlet	region 10.
	b ci 1. cl	guide walls i	) form here,	in particular in t	he
	gu i de	region 18,	a channel 13	. The channel. 13	i s
	delim	ited laterally	by the guide	walls y and downward	.ly
35	by a	channel bottom	14. From the	channel bottom 14, t	Ci

guide walls 9 extend in the direction of the curve inner side 6. In the direction of the curve inner side 6, the channel 13 is open opposite the channel bottom

WO 2015/185460

PCT/EP2015/062023

14. That, it is to say, therefore, that the flow medium S, which is represented in figure 7b by a dashed line, flows substantially in the channel 13. By the guide walls 9 of the channel 13, the slopping movement 5 transversely to the flow direction F is prevented.

In figure 7c, a further sectional representation of the curved section 4 is shown. Viewed in cross section, the

	channel	13 has become slightly	smaller t.	han at th	e s i t e
10	o f f i g i	ire 7b. In figure 7c,	a region	of the	gu i de
	section	18 with the constant di	stance between the	guide
	walls 9	is shown.
	In figu	res 7d and 7e, it is th	ien shown	that the	gu i de
15	walls 9	! nave in the region o	f the ou	tlet region 11

again a greater distance to one another. Viewed in the flow direction. F, the distance between the guide walls is enlarged. As a result, a fluidically advantageous situation can be created in the outlet region 11.

2.0

With respect to the cross section, not only the width of the channel 13, i.e. the distance between the guide walls 9, but also the depth of the channel 13, is an influence parameter. The depth of the channel 13 is 2 5 defined from the channel bottom 14 up to the top edge of the guide walls 9. Preferably, the depth of the channel 13 increases over the length of the channel 13 from, the inlet region 10, viewed in the flow direction

F, i.	until a maximum depth	Ϊ. 8 .1	reached .	The increase in.
t h Θ	depression is shown in	figu	ires 7a	and 7b. In figure
7c,	the maximum depth of	the	channel	13 is shown. In
addi	tion, the depth of the	channel 13	then changes over
t' Γ1Θ	length of the channel	13	in the	outlet region 11
SUCh	that the depth of the cl	lannel :	13, s t a r t i n g f r o m
the	maximum depth, is dim	.inisl	med, as	is shown on the

basis of finures 7d and 7e.

WO 2015/185460

PCT/EP2015/062023

The distance between the two guide walls 9 of the channel 13 and also the depth of the channel 13 have an influence on the channel cross-sectional area, which is determined from these two quantities. The channel 5 cross-sectional area increases over the length of the channel 13 in an inlet region 10. In the guide region 18, the channel cross-sectional area is preferably kept constant. In the outlet region 11, the channel crosssectional area then diminishes once again.

Viewed in cross section relative to the curved section

	4, the	channel bott	om 1	4 is of	c ο n c a v e 1 y c u r v e d
	configuration. The cor	reave	curvature	24, which can be
	clear1y	r e c o g η i z e d i n	the c	ross-secti	.onal figures 7a to
15	7e, is	at least in	some	sections	greater than the
	radius	of the opposite	w ail	of the cr	irve inner side. As

a result of the concave curvature 2.4, a further fluidic optimization can be achieved.

2.0	The curved	section 4	can be config·	ured on the	curve
	inner side	6	with a	w i de n i n g 15 . T	he widening	'17 is
	a d v a n t a g e o u	s,	because	any cross-secti	onal change	due to
	the guide	eJ	.ement 8	is compensatable. It is	hereby
	e n s u r e o t h a	t	the tot al.	cross section	through the	curved
2 5	section 4 i	s	not dimin	i s h e d r e 1 a t i v e	to the total	cross

section of the first pipe section 4 area, it kJ the entire length he curved sectic of a 90° figures, the center line M of the curved can is tor line

M becomes c ο n t i n u o u s 1 y g r e a t e r b e t w e e n pipe tion 3 section 7. The

WO 2015/185460

PCT/EP2015/062023 becomes smaller between the first, pipe section 3 and the second pipe section 7. As a result, a fluidic optimization can likewise be achieved.

5	In addition, in the first	pipe section	2,	on the inner
	side, is arranged a flow	divider 16.	The	flow divider
	16 serves to rupture the '	wall flow or	filii	t flow of the

flow medium S along the inner wall. The flow divider 16 is arranged as an elevation and extends here from the 10 inner wall 17 of the pipe section 3.

The flow divider 16 is arranged opposite to the curve outer side 5, so that the flow medium S can be fed from the curve inner side 6 to the curve outer side 5, and 15 to the guide element 8 arranged there. This effect of the flow divider 16 is shown in figure 2.

The flow divider 16 can be part of the downpipe 2 of part of the first pipe section 3.

0

The flow divider 16 can be variously configured.

Particularly preferredly, the flow divider is configured according to EP 1 882 786.

WO 2015/185460

PCT/EP2015/062023

REFERENCE

LIST

	1 2	deflecting bend downpipe
5	2	first pipe section
	4	c u r v e d s e c t i ο n
	5	curve outer side
	/· Ό	curve inner side
	‘7 j	second pipe sectio
10	8	guide element
	g	guide wall
	10	inlet region
	11	out1e t r e g i ο n
	12	ή η H r·. t* 43 j·· ή fs π
		-1-. J. J. '—.1. >— Λ Λ Cl 1— -I.. 1 1
15	13	channel

flow divider

2.0 gu. .1 ae sgron wall

	141 M2 M	first center axis second center axi center line
3 0
	c;	flow medium

WO 2015/185460

Claims

PATENT CLAIMS

1. A deflecting bend for a downpipe for the discharge of a multiphase flow medium, in particular consisting of water, solids and air, comprising a first pipe section, which extends along a first center axis, a curved section, which adjoins this first pipe section and extends along a curved center line with a curve outer side and a curve inner side, and a second pipe section, which adjoins the curved section and extends along a second center axis, wherein the second center axis is inclined at an angle to the first center axis, which angle lies within the range from 91° to 95°, wherein, with a guide element arranged on the inside on the curve outer side, the cross-sectional shape of the curved section is altered such that a movement of the flow medium, in particular of the water and of the solids, transversely to the flow direction is suppressible, in particular preventable and wherein the center line of the curved section has a variable radius, wherein the radius continuously increases between the first pipe section and the second pipe section.
2. The deflecting bend as claimed in claim 1, characterized in that the guide element is at least one guide wall disposed in the region of the curved section, wherein the guide wall is oriented substantially in the flow direction.
3. The deflecting bend as claimed in claim 1 or 2, characterized in that the guide element or the guide wall extends fully over the curved section, or in that the guide element and the guide wall extend partially over the curved section.
4. The deflecting bend as claimed in claim 2 or 3, characterized in that precisely two of said guide walls are arranged at a distance to one another.

WO 2015/185460

PCT/EP2015/062023

2015270716 20 Nov 2018
5. The deflecting bend as claimed in claim 4, characterized in that the two guide walls, viewed in the flow direction, have an inlet region in which the distance between the guide walls, viewed in the flow direction, is narrowed, and/or in that the two guide walls have a guide region in which the distance between the guide walls is constant, and/or in that, viewed in the flow direction, the two guide walls have an outlet region in which the distance to one another, viewed in the flow direction, is enlarged.
6. The deflecting bend as claimed in any one of claims 2 to

5, characterized in that the at least one guide wall lies at least in some sections parallel to a plane which runs through the first center axis and the second center axis .
7. The deflecting bend as claimed in any one of claims 2 to

6, characterized in that the guide wall is provided by an indentation from outside in the region of the curve outer side, wherein the indentation lies preferably on both sides of a plane which runs through the first center axis and the second center axis .
8. The deflecting bend as claimed in any one of claims 2 to

7, characterized in that said mutually spaced guide walls form a channel, wherein the channel has a channel bottom from which the guide walls extend in the direction of the curve inner side, and wherein the channel is open opposite the channel bottom, in the direction of the curve inner side.
9. The deflecting bend as claimed in claim 8, characterized in that the channel depth increases over the length of the channel, viewed in the flow direction, in an inlet region, and diminishes, viewed in the flow direction, in an outlet region and/or

WO 2015/185460

PCT/EP2015/062023

2015270716 20 Nov 2018 in that the channel cross-sectional area increases over the length of the channel, viewed in the flow direction, in an inlet region, and diminishes, viewed in the flow direction, in an outlet region.
10. The deflecting bend as claimed in claim 8 or 9, characterized in that the channel bottom, viewed in the cross section to the center line of the curved section, is of concavely curved configuration, wherein the radius of said concave curvature is preferably larger than the radius of the opposite wall of the curve inner side.
11. The deflecting bend as claimed in claim 1, characterized in that the guide element is a plurality of guideways arranged at a distance to one another within the curved section on the curve outer side, which guideways are oriented in the flow direction .
12. The deflecting bend as claimed in any one of the preceding claims, characterized in that the curved section is configured on the curve inner side with a widening, with which widening any change in cross section due to the guide element is compensatable .
13. The deflecting bend as claimed in any one of the preceding claims, characterized in that the first pipe section and/or the second pipe section have a circular-cylindrical cross section.
14. The deflecting bend as claimed in one of the preceding claims, characterized in that in the first pipe section, on the inner side, is arranged a flow divider, which ruptures the film flow of the flow medium, in particular of the water.
15. The deflecting bend as claimed in one of the preceding claims, characterized in that the flow divider is configured as an elevation of the inner wall of the first pipe section, and/or

WO 2015/185460

PCT/EP2015/062023

2015270716 20 Nov 2018 in that the flow divider is arranged opposite the curve outer side, so that the flow medium can be fed from the curve inner side to the curve outer side, and to the guide element arranged there .