BACKGROUND OF THE INVENTION
[0001] The invention relates to a well which includes a well bottom and a wall and at least
one outlet connection and in the bottom of which well there is provided at least one
flow channel at least for the outlet connection.
[0002] The invention also relates to a well bottom which is provided with at least one flow
channel at least for the outlet connection.
[0003] Wells, in particular sewage wells, shall comprise, at the bottom thereof, a flow-guiding
channel, by which incoming flow into a sewer is guided to an outlet connection from
the well. Thanks to the flow channel impurities flowing in pipes do not block the
well. The flow channel may be provided, for instance, by die-casting the well bottom
such that it comprises flow channels from an
inlet connection or inlet connections to the outlet connection. If there are several
inlet connections, the flow channels meet in the middle of the well bottom. A solution
of this kind was disclosed, for instance, in
WO 01/96777. It is relatively expensive to produce the well bottom by die-casting. In addition,
the locations of the outlet connection and the inlet connections are to be determined
precisely in advance, and, in practice, changes are not possible to make on the construction
site.
[0004] Publication
FI 76159, in turn, discloses a solution, in which there is provided a thick well bottom, the
centre of which is formed thinner such that the bottom is like a bowl. When a connection
is made to the well, the thick bottom is drilled with a special drill to provide a
hole and a groove extending to the centre of the bowl-like bottom. In that case the
flow channels drilled from different directions meet in the middle of the bottom.
This solution is very cumbersome and expensive to implement. In particular, it is
cumbersome and difficult to make connections to the well on the installation site,
because a special drill has to be used for making them.
[0005] Publications
NL 1000840 and
GB 1443052 disclose a well, the bottom of which is like a cup, and in the mid-section of the
cuplike bottom there is arranged a flow guide protrusion such that the cuplike bottom
and the flow guide protrusion together form a circular flow channel, whereby the flow
is guided to circulate along the edges of the bottom. Publication
WO 2004/007857 also discloses a solution of this kind. In addition, publication
WO 2004/007857 discloses that the flow guide protrusion comprises a flow guide bulge that is arranged
to guide the flow towards the inlet connection.
BRIEF DESCRIPTION OF THE INVENTION
[0006] The object of the invention is to provide a novel well and a novel well bottom.
[0007] The well of the invention is
characterized in that the flow-forming part of the well bottom consists of a plate that is formed sloping
towards the centre of the well bottom in other parts except for the flow channel.
[0008] Further, the well bottom of the invention is
characterized in that the flow-forming part of the well bottom consists of a plate that is formed sloping
towards the centre of the well bottom in other parts except for the flow channel.
[0009] The basic idea of the invention is that the well bottom consists of a plate that
is provided with at least one flow channel at least for the outlet connection. In
other parts, except for the flow channel, the plate is formed sloping towards the
centre of the well bottom. For inlet connections, holes are drilled in a well wall,
when necessary, slightly higher up than where the hole for the outlet connection is.
The well bottom is funnel-like and from the centre of the funnel-like bottom starts
a flow channel to the outlet connection, whereby the locations of the inlet connection
may be selected almost freely. The funnel-like bottom structure guides the flow smoothly
to the outlet connection regardless of the location of the inlet connection. Thus,
the well need not be customized in advance, and the directions of the inlet and outlet
connections need not be known until on the installation site, whereby the customization
of the well for each particular purpose is simple and easy. The structure of the well
is also simple and therefore easy and cost-effective to manufacture.
[0010] The basic idea of an embodiment is that the bottom consists of said sloping part
and of a substantially horizontal part resting on the ground, which part resting on
the ground is mainly even. The sloping part and the part resting on the ground form
together the sturdy structure of the well bottom. Further, as the lower face of the
part resting on the ground is mainly even, substantially no voids will be formed under
the well, which might cause in the ground changes or stresses that would affect the
well, but the lower part of the well may be placed throughout steadily and closely
against the ground.
[0011] The basic idea of a second embodiment is that in the vicinity of the outlet connection
the sloping plate is steeper close to the edge of the well than close to the centre
of the well bottom, and in other parts than in the vicinity of the outlet connection
the slope angle of the sloping plate remains substantially constant. In that case
the flow may be guided and turned smoothly and effectively towards the outlet connection
and this ensures the smooth flow in the well.
BRIEF DESCRIPTION OF THE DRAWINGS
[0012] In the following, the invention will be described in greater detail in connection
with the attached drawings, in which
Figure 1 shows schematically a well bottom seen obliquely from above and cross cut,
Figure 2 is a schematic top view of the well bottom of Figure 1,
Figure 3 is a schematic top view of a second well bottom,
Figure 4 is a schematic view of the lower part of the well having a well bottom of
a third embodiment, seen obliquely from above and cross cut,
Figure 5 is a schematic view of the lower part of the well having a well bottom of
a fourth embodiment, seen obliquely from above and cross cut,
Figure 6 is a top view of the well bottom of Figure 5,
Figure 7 is a schematic view of the well bottom of Figure 5, seen obliquely from above,
and
Figure 8 is a schematic view of the well bottom of a fifth embodiment, seen obliquely
from above.
[0013] In the figures some embodiments of the invention have been presented in a simplified
manner for the sake of clarity. Like reference numerals refer to like parts in the
figures.
DETAILED DESCRIPTION OF THE INVENTION
[0014] Figure 1 shows a well bottom 1. The well bottom 1 consists of a plate 2. The plate
2 is designed such that the well bottom 1 comprises a flow channel 3a towards an outlet
connection. The plate 2 is further designed such that the well bottom 1 is funnel-like,
i.e. in other parts except for the flow channel 3a the plate 2 is formed to slope
towards the centre of the bottom 1. The flow channel 3a is slightly inclined towards
the outlet connection. In Figure 2, the bottom 1 of the well is illustrated from above.
[0015] In the well bottom 1 of Figure 3 the plate 2 is designed such that, in addition to
the flow channel 3a arranged towards the outlet connection, the well bottom 1 comprises
a second flow channel 3b, which is arranged from the inlet connection towards the
centre of the bottom 1. Except for the second flow channel 3b, the well bottom of
Figure 3 is similar to the well bottom of Figures 1 and 2. The second flow channel
3b is slightly inclined towards the centre of the well bottom 1.
[0016] In connection with the well bottom of Figures 1 and 2, the inlet connections shall
be arranged clearly, i.e. typically a few centimetres, higher up than the outlet connection.
In the solution of Figure 3, one of the inlet connections need not be placed substantially
higher up than the outlet connection. So, if the well is arranged in an even ground,
it is not desirable for the sewer line to substantially lose in height in the well,
i.e. to arrange the outlet connection substantially lower than the inlet connection,
and therefore the solution of Figure 3 is well applicable in cases like this. Thus,
the solution of Figure 3 may be the bottom of an inspection well, which only receives
one inlet connection. The inlet connection and the outlet connection are arranged
on the opposite sides of the well, whereby the first flow channel 3a and the second
flow channel 3b are arranged in alignment, and consequently, in practice, one continuous
flow channel runs through the bottom of the well. Hence the flow from the inlet channel
is able to flow smoothly to the outlet connection.
[0017] In connection with the well bottom of Figure 3 it is possible to arrange in the well
also other inlet connections than the one for which the flow channel 3b is provided.
In that case, the locations of these other inlet connections may be chosen relatively
freely and they are arranged slightly higher up than the height level of the outlet
connection, whereby the flow coming therefrom flows to the mid-section of the well
bottom, thanks to the funnel-shaped bottom, and further through the flow channel 3a
leading towards the outlet connection to the outlet connection.
[0018] Figure 4 shows the lower part of the well 3. The well 3 may be a sewage well, in
which the disclosed solutions are particularly useful, because smoothness of flowing
is of utmost importance in the sewage wells. The disclosed solutions may also be used,
for instance, in connection with drain wells or some other wells. Wells are used,
for instance, when several inlet connections are to be joined to one outlet connection,
i.e. for instance several inlet sewers to one outlet sewer. Further, wells are used
for changing the direction of underground pipework. Wells are also used as inspection
wells in direct pipelines. When the well is used as a drain well, it does not necessarily
involve a single inlet connection. In that case water runs into the drain well through
its cover or set of covers.
[0019] In the solution of Figure 4 the well bottom 1 is attached to the well wall 4. Attachment
of the bottom 1 to the wall 4 may take place, for instance, by gluing or welding or
by using some other suitable attachment method. Further, it is possible to provide
the bottom and the wall of the well to be an integral structure, for instance, by
means of die casting or rotational casting or by using some other solution producing
an integral structure. Further, Figure 4 shows an outlet connection 5, into which
the flow from the flow channel 3a is directed.
[0020] In the solution of Figure 4, the bottom 1 also consists of a substantially horizontal
part 6 resting on the ground, in addition to the sloping plate 2 that provides flow.
The lower face of the part 6 resting on the ground is mainly even, whereby it fits
closely against the ground below. The part 6 resting on the ground and the plate 2
are interconnected by means of side walls and connection walls 7. It is also possible
to use ribs or support poles or other corresponding structures for connecting the
part 6 resting on the ground and the plate 2. The connection walls 7 are formed such
that an aperture 8 is provided in the middle thereof. In that case the bottom 1 is
easy to manufacture, for instance, by rotational casting or blow moulding. Naturally,
because of the apertures 8 the part 6 resting on the ground is not completely even,
but the proportion of the apertures 8 of the total surface area of the part resting
on the ground is so small, however, that the surface is mainly even. Advantageously
the proportion of the apertures 8 of the total surface area of the part resting on
the ground is less than 40%, particularly advantageously less than 20%.
[0021] It is also possible to provide the bottom 1 such that the plate 2 is formed to be
a separate piece and the part 6 resting on the ground is a separate piece, and these
pieces are interconnected, for instance, by welding or gluing. In that case it is
also possible to use injection moulding technique and nevertheless result in an even
lower face of the part 6 resting on the ground.
[0022] The solution of Figure 5 corresponds, to a great extent, to the solution of Figure
4, but in the solution of Figure 5 there is provided a flow channel 3b from the inlet
connection towards the midsection of the well bottom, and an inlet connection 9 is
mounted in the well 3.
[0023] Further, in Figure 5 the plate 2 is formed in the vicinity of the channel 3a leading
to the outlet connection 5 to be more sharply sloping close to the edge of the well
3 than close to the centre of the bottom 1. In other parts than in the vicinity of
the outlet connection 5 the slope angle of the sloping plate 2 remains substantially
constant.
[0024] Said detail is illustrated by the different shapes of flow channels 3a and 3b in
Figure 6 and it also appears from Figure 7.
[0025] In the solution of Figure 8 the bottom 1 comprises only a flow channel 3a leading
towards the outlet connection. In the vicinity of this flow channel 3a the sloping
plate is also formed to be steeper close to the edge of the well than close to the
centre of the well bottom 1. Also in this case the slope angle of the sloping plate
2 is substantially constant in all other parts except for in the vicinity of the channel
3a. Typically, the inlet connections are arranged on the opposite side of the well
with respect to the outlet connection, i.e. in the area of 180 degrees which is furthest
away from the outlet connection and where, for instance in the case of Figure 8, the
slope angle of the sloping plate 2 remains constant.
[0026] In some cases the features set forth in this application may be used as such, irrespective
of other features. On the other hand, features set forth in this application may be
combined, when necessary, to provide various combinations.
[0027] The drawings and the relating specification are only intended to illustrate the inventive
idea. The details of the invention may vary within the scope of the claims.
1. A well which includes a well bottom (1) and a wall (4) and at least one outlet connection
(5) and in the bottom (1) of which well there is provided at least one flow channel
(3a) at least for the outlet connection (5), characterized in that
the flow-forming part of the well bottom (1) consists of a plate (2) that is formed
sloping towards the centre of the well bottom (1) in other parts except for the flow
channel (3a).
2. The well of claim 1, characterized in that
the well bottom (1) consists of said sloping plate (2) and of a substantially horizontal
part (6) resting on the ground, which part (6) resting on the ground is mainly even
and whereby the sloping plate (2) and the part (6) resting on the ground together
form the bottom (1) of the well.
3. The well of claim 2, characterized in that
the sloping plate (2) and the part (6) resting on the ground are formed to be an integral
structure by means of rotational casting or blow moulding.
4. The well of any one of the preceding claims, characterized in that
the sloping plate (2) is steeper in the vicinity of the outlet connection (5) close
to the edge of the well (3) than close to the midsection of the bottom (1) of the
well (3).
5. The well of claim 4, characterized in that in other parts except for in the vicinity of the outlet connection (5) the slope
angle of the sloping plate (2) remains substantially constant.
6. The well of any one of the preceding claims, characterized in that
the well includes at least one inlet connection (9).
7. The well of claim 6, characterized in that in the plate (2) forming the bottom (1) of the well (3) there is provided a second
flow channel (3b) from the direction of the inlet connection (9) towards the centre
of the bottom (1) of the well (3).
8. The well of claim 7, characterized in that
the flow channel (3a) leading towards the outlet connection (5) is aligned with the
flow channel (3b) from the inlet connection (9) towards the centre of the bottom (1)
of the well (3).
9. A well bottom which is provided with at least one flow channel (3a) at least for an
outlet connection (5), characterized in that
the flow-forming part of the well bottom (1) consists of a plate (2) that is formed
sloping towards the centre of the well bottom (1) in other parts except for the flow
channel (3a).
10. The well bottom of claim 9, characterized in that
the well bottom (1) consists of said sloping plate (2) and of a substantially horizontal
part (6) resting on the ground, which part resting on the ground (6) is mainly even
and whereby the sloping plate (2) and the part (6) resting on the ground together
form the bottom (1) of the well.
11. The well bottom of claim 10, characterized in that
the sloping plate (2) and the part (6) resting on the ground are formed to be an integral
structure by means of rotational casting or blow moulding.
12. The well bottom of any one of claims 9 to 11, characterized in that
the sloping plate (2) is steeper in the vicinity of the outlet connection (5) close
to the edge of the well (3) than close to the midsection of the bottom (1) of the
well (3).
13. The well bottom of claim 12, characterized in that
in other parts except for in the vicinity of the outlet connection (5) the slope angle
of the sloping plate (2) remains substantially constant.
14. The well bottom of any one of claims 9 to 13, characterized in that in the plate (2) forming the well bottom (1) there is provided a second flow channel
(3b) from the direction of the inlet connection (9) towards the centre of the well
bottom (1).
15. The well bottom of claim 14, characterized in that
the flow channel (3a) leading towards the outlet connection (5) is aligned with the
flow channel (3b) from the inlet connection (9) towards the centre of the bottom (1)
of the well (3).