EP3656936A1 - Lifting assembly - Google Patents

Abstract

In a lifting system (H) for waste water, with a container (1) and a pressure pipe (D) mounted in a wall (18) of the container, on the inside section (13) of which there is a pressure port structure (3) via a backflow preventer (5) The pump (P) installed in the tank and a drain (L) can be connected to its outer section (7), the backflow preventer (5) can be installed and removed manually without tools.

Description

The invention relates to a lifting system according to the preamble of claim 1.

In a generic lifting system according to EP 1 944 420 A1 is the pressure pipe penetrating the wall of the container through a lateral bore through an external nut on the inside against the wall of the plastic container, so that the external section protrudes from the wall and the internal section protrudes from the wall inwards. Inside sealing elements ensure the required tightness under the tightening tension of the nut. The backflow preventer is screwed to the inner section of the pressure pipe, so that tools have to be used to remove and install the backflow preventer and / or the pressure pipe (e.g. for cleaning or maintenance), which due to unavoidable contamination and corrosion in this area z. B. on the screws and with restricted visibility is very tedious and uncomfortable, and also requires considerable skill.

Further state of the art can be found in EP 2 447 429 A1 ; US 6 059 208 A ; US 2006/0 228 222 A1 ; DE 28 53 312 A ; EP 3 103 932 A1 .

The invention is based on the object of creating a lifting system of the type mentioned which is distinguished by convenient creation, maintenance and cleaning and improved operational safety.

The object is achieved with the features of claim 1.

The backflow preventer can be installed and removed by hand only with the eccentric lever and the at least one spigot, for example for cleaning or maintenance or for the first installation, even with a lifting system already installed (underfloor or freely installed lifting system). Installation is particularly easy, since the plug pin must be inserted into the plug flap when the check valve is tilted, and then the eccentric lever must be brought together with the extension, so that when the eccentric lever is rotated via the extension, the tightening tension required for tightness between the seat ring of the backflow preventer and a socket of the pressure pipe, preferably via a seal, can be produced to the required extent. The removal of the non-return valve is correspondingly simple, since only the eccentric lever needs to be turned so far that the extension of the non-return valve is released so that it is free tilt away and lift out with the plug pin. If necessary, a pressure element is even provided on the eccentric lever, which, when the eccentric lever rotates to remove the non-return valve, presses it out of the socket of the pressure tube. This principle of the tool-free manual handling of the backflow preventer is also expedient for those lifting systems which contain a one-piece pressure pipe, as in EP 1 944 420 A1 .

By decoupling the sections or the tubular body with respect to a power transmission (tilting forces and torsional forces), inevitable external forces are at best transferred to the wall of the container, but not to the internal section, which in this case permanently maintains its target position relative to the pump adheres to. In addition, by separating from the outer section, the tubular body of the inner section can be attached with simple structural means in such a way that it can be used without tools, i.e. is easy to install and remove by hand for the fitter or user. Because the outer section or its tubular body is fixed separately from the inner section on the wall of the container. The tubular body of the inner section is inserted into a tube formed in the wall, preferably with a seal placed in between. It is releasably locked under axial tightening for tool-free installation and removal in a holding structure molded or attached to the wall. All manipulations on or with the inner section can thus be carried out manually without tools, which considerably increases the comfort for the user or fitter.

The tubular body of the inner section has a round tube part which can be inserted into the tube of the wall and has an end flange which limits the insertion depth into the tube, and then has a profile tube part which is enlarged compared to the round tube part and has at least two opposite elastic holding claws with latching hooks and an end fitting for the backflow preventer. These structural details of the tubular body make installation considerably easier and offer a high level of security against installation errors. Due to the elasticity of the holding claws, the latching hooks anchor on the abutments of the holding structure and in such a way that the tightening tension required for tightness is generated and held in the axial direction. The wall-mounted holding structure for the tubular body of the inner section has at least two opposite insertion openings with abutments for the latching hooks of the holding claws of the tubular body. The insertion openings and the abutments are placed in such a way that the engagement is released by pressure from the outside on the latching hooks and the tube body can be pulled out of the tube of the wall, expediently together with the seal.

Furthermore, a pivotable clamping bracket can be provided on the outside of the backflow preventer for connecting / disconnecting the pump pressure connection structure to / from the backflow preventer without tools.

With a view to convenient assembly, the tubular body of the outer section can have blocks with snap-in receptacles for elastic snap-in hooks that can be inserted into the snap-in receptacles without tools and are adjacent to a flange.

Fig. 1

eine perspektivische Draufsicht auf eine hier als nicht-beschränkendes Beispiel als Unterflur-Hebeanlage ausgebildete Hebeanlage ohne obere Abdeckung,

Fig. 2

einen Teil eines Abschnitts in der Schnittebene eines Ablaufs aus der Hebeanlage,

Fig. 3

einen Detailabschnitt in größerem Maßstab als in Fig. 2,

Fig. 4

eine Perspektivdraufsicht montierter Komponenten in der Hebeanlage, und

Fig. 5

eine perspektivische Druntersicht eines Exzenterhebels zur werkzeuglosen händischen Montage eines Rückflussverhinderers in der Hebeanlage.

The invention is explained in more detail with reference to the drawing. Show it:

Fig. 1

3 shows a perspective top view of a lifting system designed here as a non-limiting example as an underfloor lifting system without an upper cover,

Fig. 2

part of a section in the sectional plane of an outlet from the lifting system,

Fig. 3

a detail section on a larger scale than in Fig. 2 ,

Fig. 4

a perspective top view of assembled components in the lifting system, and

Fig. 5

a bottom perspective view of an eccentric lever for the tool-free manual assembly of a backflow preventer in the lifting system.

A lifting station H, in Fig. 1 As a non-limiting example, an underfloor lifting system has a plastic container 1, which is composed of a lower part 1a and an upper part 1b. The upper part 1b is formed with a circumferential flange 2 which can be used in a sealing plane when installed underground. Alternatively, the lifting unit H could be used for free installation, if necessary then without the peripheral flange 2. The lifting unit H is in Fig. 1 shown open above. However, either a cover or an attachment can be mounted there.

Waste water flows through an inlet Z into the container 1 and is pumped upwards via an outlet A from the container 1 and via a discharge line L indicated by a broken line by an inserted pump P. The pump P is equipped with a pressure nozzle structure 3, which can be connected to a backflow preventer 5 via a tensioning bracket 4, and can be separated by hand from the backflow preventer 5 by actuating the tensioning bracket 4, e.g. B. to remove the pump P.

The drain A has a pressure pipe D tightly and firmly mounted in a wall 18 of the upper part 1b, which has an outer section 7 and an inner section 13. As with the Fig. 2 and 3rd is explained, the inner and outer sections 13, 7 are separate tubular bodies 29, 30 which are installed in a decoupled manner against mutual power transmission. The outer section 7 has a fastening flange 8 at one end, which is screwed into a receptacle 28 of the wall 18. From the other end of the outer section 7, a connector 12 for connecting the derivative L protrudes. In the embodiment shown, two blocks 9 are furthermore attached to the outside of the outer section 7, which have abutments 10 and insertion openings 11 for latching hooks (not shown) in the connection area of the derivation L.

The tubular body 30 of the inner portion 13 is attached to a wall 18, for. B. screwed, or molded retaining structure 14 with here, for example, two opposite holding claws 15. As mentioned, either a cover or an attachment part can be installed in the upper opening 16 of the upper part 1b. An eccentric lever 17 is rotatably arranged on the inner section 13 of the pressure pipe D and is used for the manual installation and removal of the non-return valve 5 without tools.

In the sectional views of the Fig. 2 and 3rd it can be seen that the inner and outer sections 13, 7 are the separate, one-piece tubular bodies 29 and 30, the tubular body 30 of the inner section 13 being a round tube part 31 and a profile tube part 22 with a larger inner cross section and a socket 23 for a seat ring 24 of the backflow preventer 5 having a pivotable flap 25. The eccentric lever 17 is rotatably mounted for positive and non-positive interaction with an extension 26 on the seat ring 24 of the check valve 5 and on top of the profile tube part 22. The round tube part 31 of the tube body 30 inserted into the tube 19 of the wall 18 carries a seal 20 '; in the receptacle 28, the flange 8 is also sealed by a seal 20. The pump pressure connection structure 3 is tensioned with the tensioning bracket 4 in the seat ring 24 of the backflow preventer 5, preferably via a seal.

How Fig. 3 emphasizes more clearly, at least one circumferential groove 33 is formed on the round tube part 31 of the tubular body 30, and the round tube part 31 with the seal 20 'is inserted into the tube 19 of the wall 18 to such an extent that there is a space S between the tube bodies 29 and 30 . The seal 20 ′ with which the tubular body 30 is inserted into the tube 19 has an angular cross section with an annular part 34 and an outer flange 35 and at least one inner rib 34 'which engages in the circumferential groove 33. The tubular body 30 is with the in Fig. 1 indicated holding claws 15 anchored in the holding structure 14, as will be explained with reference to the other figures, and lies with the flange 21 on the annular flange 35 of the seal 20, the flange 21 z. B. maintains a space X to the wall 18.

On the profile tube part 32 of the tubular body 30, the eccentric lever 17 is rotatably fixed above a vertical axis, for. B. screwed, which has a handle 38 for manual rotation, and an eccentric to the axis of rotation recess 39 for engaging the extension 26 on the seat ring 24 of the check valve 5. Furthermore, at least one retaining tab 37 is integrally formed on the profile tube part 32, into which a plug pin 36 on the seat ring 24 of the check valve 5 can be inserted, as shown. The tight fit of the backflow preventer 5 positioned by means of the plug-in pin 36 is generated by means of the eccentric lever 17 and its recess 39, which is designed eccentrically relative to the axis of rotation such that the extension 26 is pulled towards the wall 18 depending on the extent of the rotation of the eccentric lever 17 . The recess 39 is open at least at one end ( Fig. 5 ), so that the extension 26 comes out of the recess 39 when the eccentric lever 17 is rotated accordingly and then the check valve 5 in Fig. 3 is tilted to the right and released from the socket 23, the plug 36 being pulled out of the plug-in tab 37. The procedure is reversed for installation. The one in the Fig. 1 and 2nd The clamping bracket 4 shown is, moreover, pivotably mounted on the seat ring 24 of the backflow preventer 5 and works together with tightening surfaces on the pump pressure connection structure 3 in order to establish the tightness here and to be able to manually release the pump P with the pressure connection structure 3 from the backflow preventer 5.

Since the tubular bodies 29, 30 are separate components, have the distance S from one another when installed, and the tubular body 30 is installed without direct contact via the seal 20 'and on the wall 18 of the upper part 1b, the inner and outer sections 7 and 13 or the tubular bodies 29 and 30 are mutually decoupled with respect to a force transmission (tilting forces and / or torsional forces). If the external section 7 is subjected to such forces, for example via the lead L or due to inaccuracies in assembly when installing the lifting system H, these forces are not transmitted to the tubular body 30. Even slight deformations of the wall 18 in the area of the receptacle 28 are not transmitted to the tubular body 30, which thus permanently maintains its desired position in the container 1 and ensures that the pump with the pump pressure connection structure 3 can be reliably connected or removed at any time.

In Fig. 4 Assembled components in lower part 1a are illustrated in their mutual assignment. The holding structure 14 for fixing the inner section 13 or its tubular body 30 is designed in a bridge-like manner and pushed from above over an upstanding skirt 40 formed on the wall 18 and fixed with fastening screws 41. In an alternative, not shown, the holding structure 14 could also be integrally formed on the wall 18. In the legs of the holding structure 14, insertion openings 42 are provided with abutments 43 behind them, on which the inserted holding claws 15 of the tubular body 30 can be locked with locking hooks 44 under tension. The holding claws 15 are elastic and automatically snap into the locked position of the latching hooks 44 when inserted. To remove the tubular body 30 by hand without tools, it is only necessary to press the latching hooks 44 from the outside inwards until the latching hooks 44 emerge from the insertion openings 42.

Fig. 4 also illustrates a tool-operated mechanism for installing and removing the check valve 5 on / from the tubular body 30. This mechanism is useful not only for tubular bodies 30, 29 that are decoupled with respect to mutual power transmission, but also for one-piece pressure pipes, for convenience Increase assembly / disassembly. The eccentric lever 17 ( Fig. 5 ) is in Fig. 4 screwed to the tubular body 30 rotatably and has a plate 48 below the hand lever 38, in the underside of which the engagement recess 39 for the in Fig. 3 shown extension 26 of the seat ring 24 of the backflow preventer 5 is formed. The engagement recess 39 follows an arc that extends eccentrically with respect to the axis of rotation of the eccentric lever 17 in order to extend the extension 26 ( Fig. 3 ) to move towards or away from the axis of rotation of the eccentric lever 17. The projection 26 is formed on an arch-shaped web 46 formed on the seat ring 24 in such a way that it can be aligned with an entry opening 50 of the engagement recess 39 and can be brought into the engagement recess 39 by rotating the eccentric lever. Fig. 4 illustrates the locked position of the eccentric lever 17. In order to be able to release the backflow preventer 5, the eccentric lever 17 in Fig. 4 e.g. B. rotated clockwise until the extension 26 emerges from the engagement recess 39, and the backflow preventer 5 in Fig. 4 can be tilted away clockwise. On the underside of the tubular body 30, the plug-in tab 37 is formed, which has either a continuous slot or two separate slots 51 for the engagement of the plug-in pin 36 on the underside of the seat ring 24. Furthermore, z. B. molded onto the seat ring 24 two guide blocks 45 which are guided during assembly along the outer sides of a block 47 formed on the tubular body 30. Finally, on the seat ring 24 z. B. an overhead locking projection 46 for locking the clamp 4 in the Fig. 2 provided open position provided.

Should, in the embodiment of the lifting system H shown, with the tubular bodies 29, 30 decoupled with regard to the mutual power transmission and the tubular body 30 decoupled with regard to the power transmission to the wall 18, external forces produce deformations in the area of the passage of the pressure tube D to a small extent, this enables Decoupling the tubular body 30 via the seal 20 and the gaps X, S, which can be selected as required, the proper connection of the pump pressure connection structure 3 with a holding collar 27 ( Fig. 2 ) given installation position of the pump P in the lower part 1b. Even a possible misalignment between the pump pressure nozzle structure 3 and the installed backflow preventer 5 could be compensated for by hand thanks to the elasticity of the seal 20 '. The seal 20 'thus assumes a double function on the one hand to seal the bushing and on the other hand to hold the tubular body 30 in a mounted position to a limited extent.

An essential aspect of the invention is that all components that can be removed for maintenance, exchange or cleaning inside the lifting system H can be manipulated by hand without tools, which considerably increases the ease of use of the lifting system for the fitter or user and the difficulties with tools fasteners that are actuatable, subject to corrosion or contamination.

1. 1. Hebeanlage (H) für Abwasser, insbesondere Unterflur-Hebeanlage, mit einem Behälter (1) und einem seitlich und abdichtet in einer Wand (18) des Behälters montierten Druckrohr (D), an dessen innen im Behälter (1) liegenden Abschnitt (13) über einen Rückflussverhinderer (5) eine Druckstutzenstruktur (3) einer im Behälter (1) verbauten Pumpe (P) und an dessen außerhalb des Behälters (1) liegenden Abschnitt (7) eine Ableitung (L) anschließbar sind,
   dadurch gekennzeichnet, dass die beiden Abschnitte (7, 13) des Druckrohrs (D) separate, bezüglich einer gegenseitigen Kraftübertragung entkoppelt verbaute Rohrkörper (29, 30) sind.
2. 2. Hebeanlage nach Ausführungsform 1, dadurch gekennzeichnet, dass die Kraftübertragung durch wenigstens eine elastische Dichtung (20') zwischen dem innenliegenden Abschnitt (13) und dem Behälter (1), sowie, vorzugsweise, durch einen freien Zwischenraum zwischen den Rohrkörpern (29, 30) beider Abschnitte (7, 13) entkoppelt ist.
3. 3. Hebeanlage nach wenigstens einer der vorhergehenden Ausführungsformen, dadurch gekennzeichnet, dass der Rohrkörper (30) des innenliegenden Abschnitts (13) durch die Dichtung (20') und einen Freiraum (X) zwischen dem Rohrkörper (30) und der Wand (18) des Behälters (1) bezüglich einer Kraftübertragung auch von der Wand (18) entkoppelt ist.
4. 4. Hebeanlage nach wenigstens einer der vorhergehenden Ausführungsformen, dadurch gekennzeichnet, dass der Rohrkörper (29) des außenliegenden Abschnitts (7) einen an oder in einer Aufnahme (28) der Wand (18), vorzugsweise über eine Ringdichtung (20), verschraubbaren Flansch (2) aufweist, und dass der Rohrkörper (30) des innenliegenden Abschnitts (13) in ein Rohr (19) der Wand (18) einsteckbar ist, vorzugsweise mit der dazwischen platzierten Dichtung (20'), und unter axialer Anzugsspannung in einer an der Wand (18) angeformten oder angebrachten Haltestruktur (14) zum werkzeuglosen Ein- oder Ausbau lösbar verriegelbar ist.
5. 5. Hebeanlage nach wenigstens einer der vorhergehenden Ausführungsformen, dadurch gekennzeichnet, dass die Dichtung (20') flanschrohrförmig mit winkelförmigem Querschnitt ausgebildet ist und zumindest wenigstens eine umlaufende Rippe (34) aufweist, die zum Eingriff in wenigstens eine außen umlaufende (33) Nut des Rohrkörpers (30) des inneren Abschnitts (13) bringbar ist.
6. 6. Hebeanlage nach wenigstens einer der vorhergehenden Ausführungsformen, dadurch gekennzeichnet, dass der Rohrkörper (30) des innenliegenden Abschnitts (13) ein in das Rohr (19) der Wand (18) einsteckbares Rundrohrteil (31), vorzugsweise mit einem die Einstecktiefe in das Rohr (19) begrenzenden Endflansch (21), und daran anschließend ein gegenüber dem Rundrohrteil (31) vergrößerten Profilrohrteil (32) mit mindestens zwei gegenüberliegenden elastischen Halteklauen (15) mit Rasthaken (44) und mit einer endseitigen Fassung (23) für den einen Sitzring (24) und eine Klappe (25) aufweisenden Rückflussverhinderer (5) aufweist.
7. 7. Hebeanlage nach wenigstens einer der vorhergehenden Ausführungsformen, dadurch gekennzeichnet, dass zum werkzeuglosen Ein- und Ausbau des einen Sitzring (24) und eine Klappe (25) aufweisenden Rückflussverhinderers (5) auf dem innenliegenden Abschnitt (13) ein drehbar angebrachter Exzenterhebel (17), der an einem Fortsatz (26) des Rückflussverhinders (5) zum Angriff bringbar ist, und am innenliegenden Abschnitt (13) dem Exzenterhebel (17) gegenüberliegend wenigstens eine angeformte Stecklasche (37) für wenigstens einen am Rückflussverhinderer (5) angebrachten Steckzapfen (36) vorgesehen sind.
8. 8. Hebeanlage nach wenigstens einer der vorhergehenden Ausführungsformen, dadurch gekennzeichnet, dass am Rückflussverhinderer (5) außen ein schwenkbarer Spannbügel (4) zum werkzeuglosen Anschließen/Trennen der Pumpen-Druckstutzenstruktur (3) an den/vom Rückflussverhinderer (5) vorgesehen ist.
9. 9. Hebeanlage nach wenigstens einer der vorhergehenden Ausführungsformen, dadurch gekennzeichnet, dass die an der Wand (18) angebrachte, vorzugsweise verschraubte oder angeformte Haltestruktur (14) wenigstens zwei gegenüberliegende Einstecköffnungen (42) mit Widerlagern (43) für die Rasthaken (44) oder Halteklauen (15) des Rohrkörpers (30) aufweist.
10. 10. Hebeanlage nach wenigstens einer der vorhergehenden Ausführungsformen, dadurch gekennzeichnet, dass die Haltestruktur (14) den fixierten Rohrkörper (30) des innenliegenden Abschnitts (13) brückenartig von oben umfasst.
11. 11. Hebeanlage nach wenigstens einer der vorhergehenden Ausführungsformen, dadurch gekennzeichnet, dass der Rohrkörper (29) des außenliegenden Abschnitts (7) innen einen Anschlag (52) aufweist, der mit einer Seite die Einstecktiefe eines in den Rohrkörper (29) mit Überstand eingesteckten Anschlussstücks (12) für die Ableitung (L) und mit der anderen Seite den Zwischenraum (S) zwischen den beiden Rohrkörpern (29, 30) begrenzt.
12. 12. Hebeanlage nach wenigstens einer der vorhergehenden Ausführungsformen, dadurch gekennzeichnet, dass die Hebeanlage (H), abgesehen von der Pumpe (P) und den Dichtungen (20, 20') zumindest zum überwiegenden Teil aus Kunststoff-Formteilen erstellbar ist.
13. 13. Hebeanlage nach wenigstens einer der vorhergehenden Ausführungsformen, dadurch gekennzeichnet, dass der Rohrkörper (29) des außenliegenden Abschnitts (7) außen etwa angrenzend an den Flansch (8) gegenüberliegende Blöcke (9) mit Rastaufnahmen (10) und/oder Einstecköffnungen (11) für elastische Rasthaken aufweist, die im Anschlussbereich an der Ableitung (L) vorgesehen und beim Anschließen der Ableitung (L) mit Anzugsspannung werkzeuglos in die Rastaufnahmen einbringbar sind.
14. 14. Hebeanlage (H) für Abwasser, insbesondere Unterflur-Hebeanlage, mit einem Behälter (1) und einem seitlich und abgedichtet in einer Wand (18) des Behälters (1) montierten Druckrohr (D), an dessen innen im Behälter liegenden Abschnitt (13) über einen Rückflussverhinderer (5) eine Druckstutzenstruktur (3) einer im Behälter (1) verbauten Pumpe (P) und an dessen außerhalb des Behälters liegenden Abschnitt (7) eine Ableitung (L) anschließbar sind, dadurch gekennzeichnet, dass zum werkzeuglosen Ein- und Ausbau des einen Sitzring (24) und eine Klappe (25) aufweisenden Rückflussverhinderers (5) auf dem innenliegenden Abschnitt (13) ein drehbar angebrachter Exzenterhebel (17), der an einem Fortsatz (26) des Rückflussverhinderers (5) zum Angriff bringbar ist, und am innenliegenden Abschnitt (13) den Exzenterhebel (17) gegenüberliegend wenigstens eine angeformte Stecklasche (37) für wenigstens einen Steckzapfen (36) des Rückflussverhinderers (5) vorgesehen sind.

Further possible embodiments of the invention are:

1. 1. Lifting system (H) for waste water, in particular underfloor lifting system, with a container (1) and a pressure pipe (D) mounted laterally and seals in a wall (18) of the container, on the section (1) of which lies inside the container (1) 13) via a backflow preventer (5), a pressure port structure (3) of a pump (P) installed in the container (1) and to which section (7) lying outside the container (1) a discharge line (L) can be connected,
   characterized in that the two sections (7, 13) of the pressure tube (D) are separate tubular bodies (29, 30) which are installed in a manner decoupled from one another with respect to the transmission of force.
2. 2. Lifting system according to embodiment 1, characterized in that the force transmission by at least one elastic seal (20 ') between the inner portion (13) and the container (1), and, preferably, by a free space between the tubular bodies (29, 30) of both sections (7, 13) is decoupled.
3. 3. Lifting system according to at least one of the preceding embodiments, characterized in that the tubular body (30) of the inner section (13) through the seal (20 ') and a free space (X) between the tubular body (30) and the wall (18) the container (1) is also decoupled from the wall (18) with respect to a power transmission.
4. 4. Lifting system according to at least one of the preceding embodiments, characterized in that the tubular body (29) of the outer section (7) has a flange which can be screwed to or in a receptacle (28) of the wall (18), preferably via an annular seal (20) (2), and that the tubular body (30) of the inner section (13) can be inserted into a tube (19) of the wall (18), preferably with the gasket (20 ') placed between them, and with an axial tension in one the wall (18) molded or attached holding structure (14) can be releasably locked for tool-free installation or removal.
5. 5. Lifting system according to at least one of the preceding embodiments, characterized in that the seal (20 ') is flange-tube-shaped with an angular cross section and has at least one circumferential rib (34) which engages in at least one outer circumferential (33) groove of the Tubular body (30) of the inner portion (13) can be brought.
6. 6. Lifting system according to at least one of the preceding embodiments, characterized in that the tubular body (30) of the inner section (13) is a round tube part (31) which can be inserted into the tube (19) of the wall (18), preferably with an insertion depth into the End flange (21) delimiting the tube (19), and then a profile tube part (32) enlarged with respect to the round tube part (31) with at least two opposite elastic holding claws (15) with latching hooks (44) and with an end socket (23) for one Has seat ring (24) and a flap (25) having a non-return valve (5).
7. 7. Lifting system according to at least one of the preceding embodiments, characterized in that for the tool-free installation and removal of a seat ring (24) and a flap (25) having a non-return valve (5) on the inner section (13), a rotatably mounted eccentric lever (17 ), which can be brought to an attack on an extension (26) of the backflow preventer (5), and on the inner section (13) Eccentric levers (17) opposite at least one molded plug-in tab (37) are provided for at least one plug-in pin (36) attached to the backflow preventer (5).
8. 8. Lifting system according to at least one of the preceding embodiments, characterized in that on the backflow preventer (5) on the outside a pivotable clamping bracket (4) for tool-free connection / disconnection of the pump pressure connection structure (3) to / from the backflow preventer (5) is provided.
9. 9. Lifting system according to at least one of the preceding embodiments, characterized in that the holding structure (14) attached to the wall (18), preferably screwed or molded, has at least two opposite insertion openings (42) with abutments (43) for the latching hooks (44) or Holding claws (15) of the tubular body (30).
10. 10. Lifting system according to at least one of the preceding embodiments, characterized in that the holding structure (14) comprises the fixed tubular body (30) of the inner section (13) in a bridge-like manner from above.
11. 11. Lifting system according to at least one of the preceding embodiments, characterized in that the tubular body (29) of the outer section (7) has a stop (52) on the inside, which on one side has the insertion depth of a connecting piece inserted into the tubular body (29) with a protrusion (12) for the derivative (L) and with the other side the space (S) between the two tubular bodies (29, 30) is limited.
12. 12. Lifting system according to at least one of the preceding embodiments, characterized in that the lifting system (H), apart from the pump (P) and the seals (20, 20 '), can be produced at least for the most part from molded plastic parts.
13. 13. Lifting system according to at least one of the preceding embodiments, characterized in that the tubular body (29) of the outer section (7) on the outside approximately adjacent to the flange (8) opposite blocks (9) with snap-in receptacles (10) and / or insertion openings (11 ) for elastic locking hooks, which are provided in the connection area on the lead (L) and can be inserted into the snap-in receptacles without tools when the lead (L) is connected with a tightening voltage.
14. 14. Lifting system (H) for wastewater, in particular underfloor lifting system, with a container (1) and a pressure pipe (D) mounted laterally and sealed in a wall (18) of the container (1), on the section inside the container ( 13) via a backflow preventer (5), a pressure port structure (3) of a pump (P) installed in the container (1) and to its section (7) outside the container, a discharge line (L) can be connected, characterized in that for tool-free operation - And removal of a seat ring (24) and a flap (25) having a non-return valve (5) on the inner section (13) has a rotatably mounted eccentric lever (17) which can be brought to bear on an extension (26) of the non-return valve (5) and on the inner section (13) opposite the eccentric lever (17) there are at least one integrally formed plug-in tab (37) for at least one plug-in pin (36) of the non-return valve (5).

Claims (5)

Lifting system (H) for waste water, in particular underfloor lifting system, with a container (1) and a pressure pipe (D) mounted laterally and sealed in a wall (18) of the container (1), on the section (13) of which is inside the container Via a backflow preventer (5), a pressure port structure (3) of a pump (P) installed in the container (1) and a drain (L) can be connected to its section (7) outside the container, characterized in that for manual tool-free and removal of the backflow preventer (5) having a seat ring (24) and a flap (25) on the inner section (13) of the pressure pipe (D), a rotatably attached eccentric lever (17) which is attached to an extension (26) of the backflow preventer (5 ) can be brought to attack, and that on the inner section (13) of the pressure pipe (D) opposite the eccentric lever (17) at least one molded-in tab (37) for at least one plug-in pin (36) of the non-return valve (5 ) are provided. Lifting installation according to claim 1, characterized in that the two sections (7, 13) of the pressure tube (D) are separate tubular bodies (29, 30) which are installed in the wall (18) and are decoupled with respect to each other, and in that the tubular body (30 ) of the inner section (13) is inserted into a tube (19) of the wall (18), preferably with a seal (20 ') placed between them, and under axial tightening tension in a holding structure (14.) molded or attached to the wall (18) ) is releasably locked for tool-free installation or removal. Lifting installation according to claim 2, characterized in that the tubular body (30) of the inner section (13) is a round tube part (31) which can be inserted into the tube (19) of the wall (18) and then a profile tube part (31) enlarged compared to the round tube part (31). 32) with at least two opposite elastic holding claws (15) with latching hooks (44) and with an end socket (23) for the backflow preventer (5), and that the holding structure (preferably screwed or molded) attached to the wall (18) 14) has at least two opposite insertion openings (42) with abutments (43) for the latching hooks (44) or holding claws (15) of the at least manually removable tubular body (30). Lifting system according to at least one of the preceding claims, characterized in that a pivotable clamping bracket (4) is provided on the outside of the backflow preventer (5) for connecting / disconnecting the pump pressure connection structure (3) to / from the backflow preventer (5) without tools. Lifting system according to at least one of the preceding claims, characterized in that the tubular body (29) of the outer section (7) on the outside approximately adjacent to a flange (8) blocks (9) with snap-in receptacles (10) and / or insertion openings (11) for has elastic snap-in hooks that can be inserted into the snap-in receptacles without the use of tools.

Images