EP1640510A1 - Well - Google Patents

Abstract

Well has a plastic housing section (1) at the bottom forming a sump and a middle plastic housing section (2) forming a well shaft. The lower housing section tapers to the ground (9) enabling the middle housing section to spring back inwards against the closing part (7) of the lower section. The top of the middle section is closed off by a third plastic housing section (3) which has a lid (5) on it with a closable inspection hole (4).

Description

The invention relates to a well with the features specified in the preamble of claim 1.

Such wells are typically used as sewage wells, especially when height differences in the sewer pipe are to be overcome. Upon reaching a predetermined level height, the submersible pump located in the well and jumps the waste water collected in the well via a pressure line comparatively small cross-section. Such wells can also be used to collect rainwater or other purposes. They typically consist of a plastic housing, which is formed in known wells substantially cylindrical. In this case, a lower portion of the plastic housing forms the future well sump and the adjoining up the middle housing section the later well shaft, which is usually closed at the top by a cover.

A disadvantage of wells known is that they collect comparatively much water due to their substantially cylindrical shape at the bottom, which can not be sucked by the pump design. Furthermore, it has been shown particularly in flood-prone areas that such wells, when they are pumped virtually empty, can float when the surrounding soil is sufficiently softened and enriched with water.

Against this background, the invention has for its object to provide a generic well, which avoids the aforementioned disadvantages.

This object is achieved according to the invention by a well having the features specified in claim 1. Advantageous embodiments of the inventions are specified in the subclaims, the following description and the drawing.

The well according to the invention is designed so that the lower housing portion is formed tapering towards the bottom, wherein the central housing portion is formed with respect to the adjoining part of the lower housing portion to spring back inside. This design has the great advantage that, on the one hand, in comparison to the well shaft, a large volume is formed in the lower housing section, which, however, can be almost completely pumped off due to the housing tapering towards the bottom. The residual volume remaining in the well is significantly smaller than in known designs, since due to the housing taper downwards, the free well cross-section and thus also the non-recoverable residual volume located there is significantly reduced.

Due to the fact that the central housing section, which forms the well shaft, springs back inwards relative to the adjoining lower housing section, the material used to produce the well can be markedly reduced with comparable stability. In addition, resulting from the recessed shaft of the considerable advantage that the lower housing portion is covered by the outside to the recessed central housing portion in the installed state by soil, over the entire shaft height. This will reliably float prevents the well, even if it is empty and the surrounding soil is flooded with water.

According to a development of the invention, an upper plastic housing section advantageously joins the middle housing section, which has an inspection opening on its upper side, which can be closed by means of a lid. The well is accessible via the inspection opening, and all the units arranged within the well, in particular the submersible pump / submersible pumps and possibly the riser system connected thereto, are accessible via the inspection opening.

As explained at the beginning, it is expedient for a number of reasons to make the housing wall of the lower housing section tapering towards the bottom. It is particularly advantageous to form the housing in this tapered region at an angle to the housing longitudinal axis between 30 ° and 60 ° in the installed position.

Preferably, the upper housing portion at the outer edge of at least one receptacle for a sealant, for. Example in the form of one or more grooves for receiving one or more circumferential sealing rings, via which a reinforcing ring on the outside of the well housing is sealingly attachable. Such reinforcing rings made of concrete are state of the art and are standardized, which is why it is expedient to form the upper housing section so that a standardized concrete fountain ring on the outside of the well housing is sealingly attachable. Conveniently, a plurality of sealing rings are provided one above the other, so that even when sagging the concrete fountain ring, as can be done for example by stress or Nachsacken the soil, the sealing contact is ensured at the well. This is important because such standardized concrete well rings typically have their own concrete fountain roof, so as to prevent water in between laterally between the well ring and the well the fountain can enter or exit, a seal is provided. Such concrete well rings are typically used where increased loads are introduced at the top of the well, for example in the carriageway area or on squares where a particularly high load from above is to be expected from vehicles or other objects.

It is particularly advantageous if the upper housing portion in the region of the sealant receiving a larger diameter than the shaft portion forming the middle housing section has. Only then is it ensured that the concrete fountain ring, which bears sealingly against the upper housing section, is also freely movable downwards, that is to say may sag, without undesired forces being introduced into the well structure, in particular the plastic housing.

According to one embodiment of the invention, it is provided that the well, z. B. if it is used without concrete fountain ring, has its own, preferably formed from plastic lid for closing the inspection opening. If necessary, such a cover can also be arranged under the concrete cover of the concrete fountain ring or replace a standardized concrete cover, which can likewise be incorporated in the inspection opening of the fountain. For concrete lids, the secure fit is usually ensured by its own weight. In order to achieve this even with a comparatively lightweight plastic lid, it is provided according to a development of the present invention that clamping or locking means are provided on the lid side, which define the lid in the inspection opening and which are preferably designed so that they are only externally by means of a Tool are accessible so that not unauthorized, especially playing children can remove the lid.

A particularly high stability with comparatively low use of material is achieved when the well has a circular cross-section. In this case, in particular, the central housing portion is formed substantially cylindrical and has circumferential stiffening ribs, which are either provided on the housing or material saving preferably such that the housing itself is contoured rib-shaped, so as to ensure a high intrinsic stability with a comparatively small material thickness.

Although the tapered design of the lower housing portion towards the bottom has the advantage that the residual volume, which can not be removed by pumping, remains relatively low, but requires a compared to cylindrical or barrel-shaped wells a smaller footprint, which in particular not yet built-in condition can cause the well to tip over easily. To prevent this, it is provided according to the invention that the housing is provided with support ribs, which extend from the oblique housing wall down to the contact surface of the well housing and thus increase the stability of the well. Such support ribs are expediently formed integrally with the well housing and are preferably formed as a hollow body, which are not in line connection with the well interior. This prevents on the one hand, that fill these support ribs with befindlicher in the well liquid and on the other hand, that they are not made of solid material, which would be unfavorable, since this would on the one hand a high cost of materials would be required and on the other hand, the weight of the well would increase, which also not is desirable. In order to form the hollow body, a constriction is provided in the region of the housing wall, which causes a closed inner wall to be formed during the production of the housing in the rotational casting process. Alternatively, the constriction may be formed such that the support ribs are indeed hollow, but with openings to the well interior, so that the ribs can fill with liquid, but essentially no fluid exchange takes place to the well out.

Conveniently, a plurality of support ribs distributed around the housing axis are arranged to ensure stability in all directions. Preferably, two staggered arranged by 180 ° to the housing longitudinal axis support ribs are provided, in particular if in the intervening areas by other embodiments of the housing in the bottom area care is taken that a corresponding support effect is given in these areas. This can be achieved, for example, by forming a receptacle for the lower end of at least one riser system leading to a submersible pump in the region between two support ribs. Since the riser system must extend so far that the submersible pump connected to it sucks as close to the ground as possible, the housing is expediently designed in this area so that sufficient space remains for the riser system mounted vertically from above along the well wall, in particular the shaft wall, and a corresponding receptacle at the bottom End is provided. This receptacle can also be provided for receiving two riser systems, if two pump units are provided.

The receptacle is advantageously designed so that the lower end of the riser system can be inserted from above into it in such a way that positive engagement is formed transversely to the longitudinal axis of the housing after insertion, ie the riser system is fixed with the lower end in the housing.

On the opposite side, so also between two offset by 180 ° to each other arranged support ribs, the housing advantageously opposite to the receiving a bulge, which extends to the bottom of the housing. This bulge also increases the stability to this side of the housing and gives the necessary space for the generally large-scale bottom suction port of the pump or pumps, if several are provided. The bulge is suitably adapted to the outer contour of the pump in this area.

The riser system can be advantageously determined in the well according to the invention in the bottom-side receptacle of the housing by simply plugging in from above. Alternatively or additionally, a guide for the riser system may be provided in the lower housing portion, which preferably has a guide rail attached to the housing, to which the riser system is movable only in the direction of the housing longitudinal axis. Such a guide rail is advantageously made of stainless steel, but may also be formed of other materials. Both the bottom-side receptacle and the guide rail advantageously make it possible not only to pull the pump on the riser system, as is state-of-the-art, but also to remove the entire riser system from above the well in order to repair it if necessary or exchange.

In order to ensure that the guide rail is as long and full-surface contact as possible and thus stable, it is advantageous to design it retracted in the region of the guide rail, in particular in the area of the lower housing section such that the guide rail extends over substantially the entire height of the lower housing section is supported flat by the retracted area of the housing. Since the retracted area falls back relative to the rest of the housing, this is additionally stiffened by the necessarily resulting and approximately radially extending wall sections and particularly dimensionally stable in this area.

Conveniently, the riser system at two points, preferably near the bottom and the upper end of the fountain side set to to ensure a stable connection to the well housing. On the bottom side, this is done by the recording and / or arranged in the lower housing section guide rail. Both systems are designed so that replacement without direct access to the well, but only through the inspection opening at the top can be done. In order to ensure this in the upper area, in particular to ensure the line connection between the riser system and the actual pressure tube, which forms the laxative line connection from the well to the outside, therefore, a flange connection is provided near the upper end of the well, which is arranged so that it is accessible from the inspection opening.

In order to allow a height adjustment between the well-side pressure tube on the one hand and the riser pipe on the other hand, according to an embodiment of the invention, the flange provided with slots which are arranged so that their long axis is arranged parallel to the longitudinal axis of the housing, d. H. that the flanges can be bolted to each other with a certain height clearance, without this having any effect on the thus formed line connection or the strength of the flange connection. Accordingly, the pipe mouths are formed slot-like in the flanges. Preferably, the flanges with the arcuate tubular sections opening into them are each produced in one piece as castings of preferably stainless steel.

Conveniently, the upper end of the riser system is attached via the flange to the pressure tube, which is releasably secured in the region between the housing passage and the flange on the housing, preferably screw-mounted. In this case, the housing is reinforced in the attachment, to ensure a stable and rigid connection to the housing. Also, this attachment point in the housing is arranged so that they possible through the inspection opening is accessible from above, so that all located within the well components can be replaced through the inspection opening without having to get into the well.

It is particularly advantageous if the well housing at least on the inside has a light color, expediently the plastic forming the housing is of light color, so that even a low incidence of light is sufficient to allow an inspection of the inside of the well. In particular, the well-known plastic housing wells are typically dark, which is a considerable disadvantage, since the well inside can be inspected by visual inspection only through intensive additional lighting.

The well housing according to the invention is advantageously formed in one piece and produced by rotational molding of plastic.

Fig. 1

ein erfindungsgemäßes Brunnengehäuse in perspektivischer Seitenansicht mit abgehobenem Deckel,

Fig. 2

eine perspektivische Ansicht des Brunnengehäuses gemäß Fig. 1 von der Unterseite,

Fig. 3

einen Schnitt längs der Schnittebene III in Fig. 2,

Fig. 4

eine perspektivische Längsschnittdarstellung durch den fertigen Brunnen,

Fig. 5

eine alternative Ausführungsvariante in Darstellung nach Fig. 4,

Fig. 6

in perspektivischer vergrößerter Explosionsdarstellung die Flanschverbindung zwischen Steigrohrsystem und Druckrohr und

Fig. 7

ein Brunnengehäuse mit aufgesetztem genormten Betonbrunnenring in Darstellung nach Fig. 1.

The invention is explained below with reference to an embodiment shown in the drawing. Show it:

Fig. 1

an inventive well housing in a perspective side view with lifted lid,

Fig. 2

1 is a perspective view of the well housing according to FIG. 1 from the underside, FIG.

Fig. 3

a section along the sectional plane III in Fig. 2,

Fig. 4

a perspective longitudinal section through the finished well,

Fig. 5

an alternative embodiment in representation of FIG. 4,

Fig. 6

in an enlarged perspective exploded view of the flange connection between riser system and pressure tube and

Fig. 7

a well housing with attached standardized concrete fountain ring in the representation of FIG. 1.

The well illustrated with reference to the figures consists of a one-piece plastic housing made of plastic by rotational casting, which is formed by a lower housing section 1, a middle housing section 2 and an upper housing section 3. The lower housing section 1 forms the later pump sump of the well, the middle housing section 2 the well shaft and the upper housing section 3 a connection area for further below described components and an inspection opening 4, which is lockable by a cover 5. The well housing is essentially rotationally symmetrical about a longitudinal axis 6 which is approximately vertical in the installed position.

The lower housing portion 1 has a cylindrical portion 7, which projects beyond the central housing portion 2 radially. The cylindrical portion 7 goes down into a tapered portion 8, which extends to the bottom 9 of the well housing. In the region of the conically tapering section 8, two support ribs 10 which are offset by 180 ° with respect to one another and are arranged on the axis 6 are provided, which are hollow and are formed integrally with the rest of the housing. These support ribs extend to the footprint of the well housing, stabilize the tapered portion 8 in the wall area and also form a particular support laterally to the bottom 9 to increase the footprint and thus the stability of the stand, especially when not yet installed. To form the support ribs 10 as a closed hollow body, are close to Contained constricted areas 33 of the housing wall, which enforce in Rotationsgussverfahren such that a further flow of material is suppressed in the Stützfußbereich and creates a closed Brunneninnenwandung.

Between the support ribs 10, so offset by 90 ° to a support rib 10 relative to the longitudinal axis, a bulge 11 is provided on one side and on the other side a receptacle 12, also in the form of a paragraph, as can be seen in particular from FIGS. 1 and 2 can be seen. Bulge 11 and receptacle 12 are arranged opposite one another and form, in particular Fig. 2 illustrates, also supports, which increase the footprint of the well housing. The bulge 11 is provided to have sufficient clearance for lowering the submersible pump unit 13 shown with reference to FIGS. 4 and 5, whereas the receptacle 12 is provided for fixing the lower end of a riser system 14, as can be seen in particular with reference to FIG ,

In alignment with the receptacle 12, the cylindrical section 7 is retracted, such that a contact surface 15 extending essentially downwards therefrom of the middle housing section 2 is provided, which is provided on the inside of the well housing with a guide rail 16, which is also additionally or serves as an alternative to the lower attachment of the riser system 14.

The lower housing section 1 is adjoined at the top by the middle housing section 2, which forms the later well shaft and is essentially cylindrical, but has a significantly smaller diameter than the cylindrical section 7 of the lower housing section 1 and thus springs back relative thereto. The middle housing portion 2 is formed ribbed in order to increase the stability. The here inwardly directed ribs 17 are formed by a meandering in cross-section housing wall However, they can also be reinforced if necessary by additional components, such as reinforcing rings and / or directed to the outside.

The middle housing portion 2 goes up into the likewise cylindrical upper housing portion 1, which is, however, provided on its outer periphery with radially projecting rings 18, such that between two adjacent rings 18 each have a groove for receiving a circumferential rubber seal not shown here in detail is provided in the form of a sealing ring. These rubber seals serve to tightly connect a standardized concrete fountain ring 19, as shown by way of example in FIG. 7. The rings 18, as in particular also illustrated in FIG. 7, project radially relative to the middle housing section, such that the concrete fountain ring 19 is displaceable in the axial direction 6 of the well, that is to say also beyond the middle housing section 2.

The upper housing portion 3 runs at its top to the inspection opening 4 toward, which is stepped, such that the cover 5 is optionally inserted sealingly in this, without the risk that this may fall into the well inside.

The cover 5 shown in FIGS. Is made of plastic and has three rotatably mounted in the cover bolt 20, which are provided at its lower end with a transverse to the bolt axis extending clamping bolt 21 which are rotatably connected to the bolts 20. The bolts themselves are rotatably mounted recessed from above, so that they are accessible and rotatable only with a special tool from the top of the lid ago. By turning the bolts 20, the clamping bolts 21 are pivoted into the clamping bolt receptacles 22 provided in this area in the upper housing section 3, whereby the cover 5 is braced against the housing section 3 and positively locked is locked. The inspection opening 4, which also forms the lid receptacle is designed so that instead of the plastic lid 5 and a standard metal / concrete lid can be used, as this also finds use in conventional wells.

In installation position, the entire well housing is typically up to the lid 5 below the surface or possibly even the lid itself. In the embodiment of Fig. 7, the top of the well is covered by a standard concrete fountain ring 19, which rests sealingly against the upper housing portion 3 , but otherwise freely movable in the direction of the longitudinal axis 6 of the well. The concrete fountain ring 19 is provided on its upper side with a lid, not shown, and known as such, which is why not described in detail here.

Within the well housing, a well known from the prior art riser system 14 is provided with which a submersible pump unit 13 can be discharged close to the bottom 9 of the well housing along the riser system 14 on a chain 23, which at the lower end automatically a fluid-conducting Making connection between the discharge nozzle of the pump assembly 13 and a riser pipe 24, which forms part of the riser system. The riser 24 is connected in parallel to a guide rail 25 fixedly connected thereto, on which the pump unit 13 is guided. The riser pipe 24 is bent at its upper end by 90 ° to a flange 26 which is provided for connection to an opposite flange 27 which is seated at the end of a pressure pipe 28, via which the pumped by the pump 13 liquid is discharged from the well ,

The flanges 26 and 27 have, as can be seen with reference to FIG. 6, elongated holes 29 whose longitudinal axis is arranged parallel to the longitudinal axis 6 of the well. In addition, the line connections are also in this area formed slot-like, such that certain manufacturing tolerances in the direction of the axis 6 can be compensated, in which the flanges 26 and 27 not only aligned with each other, but to a certain extent in the direction of the axis 6 can be fixed to each other, without the To influence the functionality of the flange connection.

In the well described not only the pump unit 13 is interchangeable, but the entire riser system 14 and the other located in the well aggregate parts. For this purpose, the riser system 14, as shown with reference to FIG. 4, held with its lower end in the form provided in the lower housing section 1 receptacle 12, after this has been introduced from above into the receptacle 12. Secured to the top is the riser system 14 by a clamp 30 which connects the pressure tube 28 via a screw with the well housing.

Alternatively or additionally, the riser system 14 may also be positively guided and fixed in the lower region on the guide rail 16 (FIG. 5), which is fastened to the contact surface 15 of the well housing, a securing against sliding upwards likewise takes place via the clamp fastening 30 Both embodiments have the advantage that the entire riser system after loosening the flange connection, which can be done from above through the inspection opening 4, removed from the well and maintained or possibly replaced.

Furthermore, within the well still a rod 31 is provided, to which various float switches 32 are attached, via which the pump control is activated and the level within the well can be determined. The rod 31 is fixed in the upper housing portion 3, so that these can be removed through the inspection opening 4 from above out.

LIST OF REFERENCE NUMBERS

1

lower housing section

2

middle housing section

3

Upper housing section

4

inspection opening

5

cover

6

Longitudinal axis of the fountain

7

cylindrical portion of the lower housing portion

8th

tapered portion of the lower housing portion

9

Bottom of the lower housing section

10

Support ribs of the lower housing section

11

Bulging of the lower housing section

12

Picture of the lower housing section

13

A submersible pump unit

14

Riser system

15

contact surface

16

guide rail

17

Ripping the middle housing section

18

Rings of the upper housing section

19

Concrete fountain ring

20

bolt

21

clamping bolts

22

Clamping locking recesses

23

Chain

24

riser

25

guide rail

26

flange

27

flange

28

pressure pipe

29

slots

30

clamp

31

pole

32

float switch

33

constriction

Claims (20)

Well with a lower, the future well sump forming plastic housing portion (1) and with a middle, the well shaft forming plastic housing portion (2), characterized in that the lower housing portion (1) to the bottom (9) tapering towards formed, the middle Housing portion (2) opposite to the adjoining part (7) of the lower housing portion (1) is formed jumping back inwards. Fountain according to claim 1, characterized in that adjoining the central housing section (2) is an upper plastic housing section (3) which has an inspection opening (4) which can be closed at the top by means of a cover (5). Fountain according to one of the preceding claims, characterized in that the housing wall of the lower housing section (1) in the tapered region (8) forms an angle with the housing longitudinal axis (6) which is vertical in the installation position and which is between 30 ° and 60 °. Fountain according to one of the preceding claims, characterized in that the upper housing section (3) on the outer circumference at least one receptacle for a sealing means, preferably in the form of one or more circumferential grooves for receiving one or more circumferential seals, via which a reinforcing ring (19) , Preferably, a standard concrete fountain ring (19), sealingly attachable to the outside of the well housing. Fountain according to one of the preceding claims, characterized in that the upper housing portion (3) in the region of the sealant receiving a larger diameter than the shaft portion forming the central housing portion (2). Fountain according to one of the preceding claims, characterized in that the inspection opening (4) closing lid (5) is preferably formed of plastic and clamping and / or locking means (20, 21), preferably accessible from the outside only by means of a tool and fix the lid (5) in the inspection opening (4). Fountain according to one of the preceding claims, characterized in that the central housing portion (2) is formed substantially cylindrical and provided with circumferential stiffening ribs (17). Fountain according to one of the preceding claims, characterized in that the lower housing portion (1) preferably hollow and integrally formed with the housing supporting ribs (10) extending from the oblique housing wall (8) down to the Aufstandssebne of the well housing. Fountain according to one of the preceding claims, characterized in that the support ribs (10) near the housing wall have a constriction (33). Fountain according to one of the preceding claims, characterized in that two by 180 ° to the housing longitudinal axis (6) offset support ribs (10) are provided. Fountain according to one of the preceding claims, characterized in that in the lower housing portion (1), preferably in the region between two support ribs (10) is formed a receptacle (12) for the lower end of at least one submersible pump (13) leading riser system (14) , Fountain according to one of the preceding claims, characterized in that the receptacle (12) is formed so that the lower end of the riser system (14) is fixed transversely to the longitudinal axis (6) of the housing form fit. Fountain according to one of the preceding claims, characterized in that the lower housing portion (1) preferably in the region between two support ribs (10) and opposite the receptacle (12) has a bulge (11) which extends to the bottom (9) of the housing extends. Fountain according to one of the preceding claims, characterized in that the riser system (14) is fixed on the bottom side in the receptacle (12) by insertion from above. Well according to one of the preceding claims, characterized in that a guide (16) for the riser system (14) is provided in the lower housing section (1), which preferably has a guide rail (16) attached to the housing, to which the riser system (14) only in the direction of the housing longitudinal axis (6) is movable. Fountain according to one of the preceding claims, characterized in that the lower housing portion (1) in the region of the guide rail (16) is formed retracted, such that the guide rail (16) over substantially the entire height of the lower housing portion (1) is supported flat by the retracted area (15) of the housing wall. Fountain according to one of the preceding claims, characterized in that near the upper end of the well, a flange (26, 27) between a riser (24) on the one hand and a guided through the housing pressure tube (28) on the other hand is formed, wherein at least one of the flanges (26, 27) apertures in the form of elongated holes (29), whose long axis is arranged parallel to the longitudinal axis (6) of the housing. Fountain according to one of the preceding claims, characterized in that the pressure tube (28) in the region between the housing bushing and the flange (27) is releasably secured to the housing, preferably screw-mounted, wherein in the region of the attachment, the housing is preferably formed reinforced. Fountain according to one of the preceding claims, characterized in that at least the inside of the well housing has a light color, preferably the well housing is formed of a plastic of light color. Fountain according to one of the preceding claims, characterized in that the well housing is produced integrally by rotational molding.

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