DE102020113828A1 - Suction lance - Google Patents

Abstract

The invention relates, inter alia, to a suction lance (11) for removing a liquid medium (13) from a container (12), comprising a suction lance base (49) for attachment to a base (20) of the container and a suction lance head (50) for connection with a metering device (10), a tubular body (26) extending in the axial direction (48) between the suction lance head and the suction lance foot, in the interior (47) of which a float body (22) and a hollow profile (27) are arranged, the hollow profile ( 27) is fastened to the tubular body (26) by means of a locking device (42) of linear design and extending in the axial direction.

Description

The invention relates to a suction lance for removing a liquid medium from a container.

The applicants and Herbert Saier GmbH, Gewerbestrasse 71, 79194 Gundelfingen and Saier Dosiertechnik GmbH, Gewerbestrasse 71, 79194 Gundelfingen, associated with the applicants, have been developing and selling suction lances of this type for decades. B. a canister or some other suitable container, a liquid, e.g. B. a chemical that is used in a cleaning or washing process, removed and a target device, z. B. a washing machine or a dishwasher, are metered.

The metering device comprises a pump which generates a negative pressure in a suction line and in this way sucks the liquid out of the container.

In order to be able to completely empty the container, the suction lance is placed with its foot on the base of the container or brought close to it. A suction lance head can protrude from the container. The suction lance is connected to the metering device via a suction line.

The invention relates to suction lances which have a float body. The float body is arranged such that it can be displaced or moved at least along a partial area of an axial extension between the suction lance base and the suction lance head. The float floats on the liquid medium and can thus display the level. A device can be assigned to the swimmer, e.g. B. a magnet that actuates different switches in different axial positions of the float. For this purpose, measuring electronics can be arranged on the suction lance. The measuring electronics can be connected to the metering device, in particular to a controller of the metering device, via an electrical connection line.

A suction lance developed by the applicants is in the DE 10 2018 106 045 A1 described. It has already been mentioned here that measurement electronics can be accommodated within the tubular body.

From the DE 10 2018 110 155 A1 a suction lance developed by the applicants emerges, which operates with a radially expandable clamping device. Here, a punctiform fastening of the structural unit comprising the suction line is provided via two radially expandable clamping devices in the area of the suction lance head and the area of the suction lance base.

In the German patent application DE 10 2019 131 381 A1 , which is subsequently published, a suction lance going back to the applicant is already described, which has a float body which is surrounded on the outside by a tubular body. The tubular body can provide a protected accommodation for the float body, so that damage to the float is reliably prevented, especially when the suction lance is inserted into the container through a narrow opening in the lid or head area of the container or removed through this opening.

In the subsequently published patent application it is described that a displacement movement of the float body in the axial direction can be permitted over a substantial or over a complete or almost complete part of the entire filling height of the container.

In this embodiment, the suction lance is so elongated in the axial direction that it corresponds to or exceeds the height of the container. Both the outer tube and a hollow profile arranged inside the outer tube, which accommodates measuring electronics and provides a suction line, are designed to be correspondingly elongated in order to enable a desired displacement movement of the float body over the entire axial extent of the suction lance. In order not to impair the displacement movement of the float body along the axial section, the hollow profile is connected to the outer pipe, the so-called tubular body or pipe body, in the area of the suction lance head and in the area of the suction lance base.

Depending on the specific design of the suction lance, due to deformation, z. B. bending, but also due to tolerances in the production of the intended gap dimensions, a displacement movement of the float body can be impaired.

The invention is based on a suction lance that has become known by the applicant and cannot be documented in printed form, the object of providing a suction lance which enables the manufacture and safe handling of axially very elongated suction lances and which also allows axial movements of the float body along large axial distances and permanently guaranteed.

The invention solves this problem with the features of claim 1.

The principle of the invention consists essentially in the fact that the suction lance according to the invention has a tubular body, a float body and a hollow profile. The tubular body extends in the axial direction between the suction lance base and the suction lance head. In particular, the tubular body extends along the entire or almost the entire axial extent of the suction lance between the suction lance base and the suction lance head in the axial direction.

The tubular body can be designed to be circular-cylindrical or essentially circular-cylindrical. It can also have a different cross-sectional shape, e.g. B. a triangular shape or any, z. B. have polygonal cross-sectional shape.

A float body and a hollow profile are arranged in the interior of the tubular body. The function of the float body is particularly similar to that in the German patent application described at the outset DE 10 2019 131 381 A1 described. In addition, a hollow profile is provided. This can have one or more chambers. In particular, the hollow profile according to the invention has at least one first chamber, which is used to accommodate measuring electronics, in particular the arrangement of a circuit board, and at least one second chamber, which forms the suction line.

The special feature is that the hollow profile is attached to the tubular body by means of a locking device. According to the invention, the locking device is linear and extends in the axial direction.

A line-like design of the locking device in the sense of the present patent application means in particular that a plurality of fastening points or fastening surfaces are provided along the axial extent of the suction lance, which lock the hollow profile and the tubular body together.

According to the invention, the locking device is designed to be continuous or quasi-continuous in the axial direction.

This line-like design of the locking device differs in particular from a locking device such as that shown in FIG DE 10 2018 110 155 A1 is described in which only a point-shaped locking in the area of the suction lance head and a point-shaped locking in the area of the suction lance base has been made.

By designing the locking device in a line shape, a frictional connection can be achieved along a large part of the axial extent of the suction lance.

In one embodiment of the invention, the linearly designed locking device can have, for example, an extension with a widened section and a shape-complementary receptacle. The extension can be attached to one of the two elements, e.g. B. on the tubular body, and the receptacle can be on the other of the two elements, for. B. be arranged on the hollow profile.

To this extent, the continuation and receptacle represent the locking elements of the locking device.

Extension and receptacle can also extend along the axial extent of the suction lance, advantageously along the entire axial length of the suction lance or a large part of the axial length of the suction lance.

The hollow profile can advantageously be fixed in a form-fitting manner on the tubular body as a result of an axial plug-in or sliding movement. The invention therefore particularly encompasses when the tubular body and the hollow profile are initially produced separately from one another, and thus provide separate components, and can subsequently be fixed to one another by an axial plugging or insertion movement. The locking can bring about a releasable or a non-releasable locking.

The hollow profile can therefore be fixed to the tubular body simply in the axial direction by a relative plug-in movement or by a sliding movement on the tubular body.

The locking device is linear. This means that a plurality or a plurality of fastening points or also a continuous fastening surface is provided which extends in the axial direction of the suction lance.

Different than in the German patent application DE 10 2019 131 381 A1 As described by the applicant, the hollow profile is no longer fastened to the tubular body at just two points, at the upper and lower end of the hollow profile, but along a line.

On the one hand, this ensures simple and safe assembly. On the other hand, the movement space for accommodating the float body along the axial extension of the suction lance can be better defined and determined in advance. Even if the suction lance is bent or curved, there is still room for movement for the float body, which is located between the outer circumferential surface of the Hollow body and the inner circumferential surface of the tubular body is unaffected in its dimension. The float can move unimpaired.

It should be noted at this point that the movement space for the float body is advantageously designed to be open downwards and also upwards, so that within the movement space - when the suction lance is immersed in the medium - the float body can always float on the surface of the medium , and the float can move as the medium level rises or falls.

According to the invention it is provided that the locking device extends interrupted or uninterrupted at least along part of the axial length of the suction lance.

The invention includes when one or more hollow profiles are fixed on the tubular body.

The invention also encompasses when the hollow profile is fixed to the tubular body by means of a locking device that is embodied in the manner of a line or by means of a plurality of interlocking devices embodied in the manner of a line.

The invention also includes when the hollow profile is fastened to the tubular body by means of a locking device designed in a linear manner and by means of an additional locking device.

The invention relates to a suction lance according to claim 1. The suction lance according to the invention is primarily used to remove a liquid medium from a container. However, the invention also relates equally to suction lances with which liquid media can be conveyed into the container. A suction lance within the meaning of the present patent application can in this respect be operated unidirectionally or also bidirectionally.

As a rule, medium is only removed from the container with the suction lance according to the invention. Equally, however, the medium can also be conveyed from another container into the container with the same object according to the claims. This object is also known in the art as a conveyor lance. For the sake of clarity, it should be noted that the invention according to claim 1 with its term suction lance also includes conveying lances.

• DE 10 2019 109 793 A1 , DE 10 2015 107 976 A1 , DE 10 2015 107 105 A1 , DE 3 091 114 A1 , DE 10 2017 107 214 A1 , DE 10 2017 114 767 A1 , DE 10 2016 102 829 A1 , DE 10 2015 122 565 A1 , DE 10 2014 010 126 A1 , DE 10 2018 122 651 A1 , DE 10 2016 125 928 A1 , DE 10 2011 108 396 A1 , DE 10 2011 119 021 A1 , DE 10 2015 110 862 A1 , DE 10 2018 117 669 A1 , DE 10 2016 121 383 A1 , DE 10 2017 103 168 A1 , DE 10 2018 113 644 A1 , DE 10 2017 114 665 A1 , DE 10 2012 012 913 A1 .

The suction lance according to the invention can be used in a metering system which has a metering device. To avoid repetition, reference is made to the following patent applications by the applicant, the content of which is hereby fully included in the content of the present patent application, also for the purpose of features that are only disclosed in one or more of the older patent applications referred to, if necessary, to be able to include in the present patent application, also in its claims:

• DE 10 2019 109 793 A1 , DE 10 2015 107 976 A1 , DE 10 2015 107 105 A1 , DE 3 091 114 A1 , DE 10 2017 107 214 A1 , DE 10 2017 114 767 A1 , DE 10 2016 102 829 A1 , DE 10 2015 122 565 A1 , DE 10 2014 010 126 A1 , DE 10 2018 122 651 A1 , DE 10 2016 125 928 A1 , DE 10 2011 108 396 A1 , DE 10 2011 119 021 A1 , DE 10 2015 110 862 A1 , DE 10 2018 117 669 A1 , DE 10 2016 121 383 A1 , DE 10 2017 103 168 A1 , DE 10 2018 113 644 A1 , DE 10 2017 114 665 A1 , DE 10 2012 012 913 A1 .

As described at the outset, the invention includes, in particular, suction lances with locking devices which enable two elements initially manufactured separately, namely the tubular body and the hollow profile, to be locked to one another. However, the invention also encompasses when the tubular body and the hollow profile are integrally connected to one another in a materially bonded manner, and are produced together in one go.

According to an advantageous embodiment of the invention, the hollow profile can be fixed in a form-fitting manner on the tubular body as a result of an axial insertion or sliding movement. This enables a particularly simple and advantageous assembly of the suction lance according to the invention. In particular, the assembly in this embodiment can also be automated or partially automated.

According to a further advantageous embodiment of the invention, the locking device has at least one extension with a widened section and at least one receptacle which is complementary in shape to the extension.

In other words, at least one of the two elements, tubular body or hollow profile, has an undercut which can be brought into engagement with a corresponding holding surface on the other of the two elements, hollow profile or tubular body. The two elements (hollow profile and tubular body) are relative due to an axial movement Can be brought into engagement with one another but not releasable from one another along a direction of movement transverse to the axial direction, but rather held together so that they cannot be lost.

The widening section can have widening surfaces formed continuously or discontinuously.

The term “complementary in shape” includes in particular that the two elements (hollow profile and tubular body) which are hooked or jammed together (hollow profile and tubular body) are prevented from being lost in the state of use along a direction transverse to the axial direction.

According to an advantageous embodiment of the invention, the receptacle is arranged on the tubular body. In this variant it is provided that the extension is arranged on the hollow profile.

According to a further advantageous embodiment of the invention it is provided that the receptacle is arranged on the hollow profile. In this variant it is provided that the extension is arranged on the tubular body.

According to a further advantageous embodiment of the invention it is provided that the float body is at least partially designed like a horseshoe. The horseshoe shape describes a U-shaped or a U-shaped shape.

This design takes into account a cross-sectional geometry of the suction lance such that the space available for movement for the float body between the inner circumferential surface of the tubular body and the outer circumferential surface of the hollow profile is also essentially U-shaped or horseshoe-shaped. The swimmer can therefore occupy a maximum area here.

• Bei dieser Variante weist der Schwimmerkörper z. B. eine an eine Kleeblattform angenäherte auf, also beispielsweise die Form eines dreiblättrigen oder vierblättrigen Kleeblatts, wobei die Zahl der Blätter der Zahl der an dem Rohrkörper festgelegten Hohlprofile entspricht. Dabei dringt der Schwimmerkörper jeweils mit einem lappenförmigen Bereich in den Raum zwischen zwei Hohlprofilen hinein.

In the event that several hollow profiles are fixed on the tubular body, the shape of the float can also deviate from a horseshoe shape. He can z. B. also be designed in a horseshoe shape only in certain areas:

• In this variant, the float body z. B. one approximated to a cloverleaf shape, so for example the shape of a three-leaf or four-leaf clover, the number of leaves corresponding to the number of hollow profiles fixed on the tubular body. The float body penetrates into the space between two hollow profiles with a tab-shaped area.

According to a further advantageous embodiment of the invention, the float body at least partially surrounds the hollow profile on the outside. In this variant, the possibility is provided that the float body is maximized in relation to its cross-sectional area.

According to a further advantageous embodiment of the invention, several hollow profiles are provided, each of which is fastened to the tubular body by means of its own locking device or via a common locking device.

In this variant, several hollow profiles are advantageously provided, which are arranged equidistant from one another. In the event that in this variant, for example, three hollow profiles are provided, these are arranged offset by approximately 120 °. In the event that four hollow profiles are provided, these are advantageously arranged offset by approximately 90 °, etc. In this embodiment of the invention, the cross-sectional area of the float body can also be maximized.

According to a further advantageous embodiment of the invention, the hollow profile has several chambers. In this variant, for example, at least one first chamber can be provided, which is used to accommodate measuring electronics. The measuring electronics can in particular a circuit board and numerous electrical components arranged on it, such as, for. B. switchable switches include.

According to the invention, at least one second chamber, which provides a suction line, is also arranged on the hollow profile.

The chamber in which the measuring electronics are arranged can be closed or sealed, for example filled with a potting compound, and in this way, in particular, seal off the measuring electronics from the medium in a liquid-tight manner.

According to a further advantageous embodiment of the invention, a movement space for the float body is provided between an outer circumferential surface of the hollow profile and an inner circumferential surface of the tubular body. The float body is arranged to be movable in particular along the axial direction of the suction lance. The range of motion can be maximized in this way. This facilitates safe, unimpaired guidance of the float body within the interior of the tubular body.

According to a further advantageous embodiment of the invention, the float body actuates different switches of a measuring electronics in different axial positions. The measuring electronics can show the different switch states detect or allow such a detection. The measuring electronics can determine or calculate the filling level of the medium in the container either independently and / or with the aid of a control of a metering device from the different switching states of different switches.

According to a further advantageous embodiment of the invention, the float body has at least one magnet. This enables a particularly simple construction of a float body of a suction lance according to the invention.

According to a further advantageous embodiment of the invention, the suction lance has an upper stop surface and a lower stop surface for the float body. This provides a defined maximum travel path for the float body.

According to a further advantageous embodiment of the invention, the suction lance has measuring electronics that can be connected to a controller on the metering device. This enables signals to be transmitted to a metering device which contain information about the level of the medium or from which information about the level of the medium can be determined or derived with the aid of the measuring electronics.

• 1 ein erstes Ausführungsbeispiel eines erfindungsgemäßen Dosiersystems mit einer Dosiereinrichtung mit einem Ausführungsbeispiel einer erfindungsgemäßen Sauglanze,
• 2 in einer vergrößerten teilgeschnittenen Ausschnittsdarstellung in schematischer teilgeschnittener Ansicht etwa gemäß Teilkreis II in 1 einen Teilbereich der Sauglanze mit einem in seiner Position veränderten Schwimmer in vergrößerter Einzeldarstellung,
• 3 ein Ausführungsbeispiel einer erfindungsgemäßen Sauglanze in einer Querschnittsdarstellung in teilgeschnittener schematischer Ansicht, etwa entlang Schnittlinie III-III in 2,
• 4 ein Ausführungsbeispiel der erfindungsgemäßen Sauglanze in einer perspektivischen, auseinandergezogenen schematischen und nicht maßstäblichen Darstellung, etwa entlang Ansichtspfeil IV in 4, wobei nur der Rohrkörper und das Hohlprofil, aber nicht der Schwimmerkörper, dargestellt sind,
• 5 ein weiteres Ausführungsbeispiel einer erfindungsgemäßen Sauglanze in einer Darstellung gemäß 3 mit einer geometrisch invertierten Anordnung eines Fortsatzes und einer Aufnahme,
• 6 ein weiteres Ausführungsbeispiel einer erfindungsgemäßen Sauglanze in einer Darstellung gemäß 5, wobei das Hohlprofil mittels zweier Teilfortsätze an dem Rohrkörper festgelegt ist,
• 7 ein weiteres Ausführungsbeispiel einer erfindungsgemäßen Sauglanze in einer Darstellung ähnlich eines Teil der Darstellung der 1, wobei drei Sauganschlussleitungen von der Sauglanze abgehen,
• 8 das Ausführungsbeispiel der 7 in einer teilgeschnittenen schematischen Darstellung etwa entlang Schnittlinie VIII-VIII in 7, in einer Darstellung vergleichbar der Darstellung der 3,
• 9 ein weiteres Ausführungsbeispiel einer erfindungsgemäßen Sauglanze in einer schematischen teilgeschnittenen Querschnittsdarstellung ähnlich der Darstellung der 6,
• 10 ein weiteres Ausführungsbeispiel einer erfindungsgemäßen Sauglanze in einer Darstellung gemäß 3, wobei ein mittels einer linear ausgebildeten Verriegelungseinrichtung an dem Rohrkörper verriegeltes Hohlprofil nur eine Kammer - zur Bereitstellung der Saugleitung - aufweist, und in einem der Verriegelungseinrichtung gegenüberliegenden Bereich an der Innenseite des Rohrkörpers eine Aufnahmetasche für eine Leiterplatte einer Messelektronik angeformt ist,
• 11 in einer Darstellung vergleichbar der 10 ein weiteres Ausführungsbeispiel einer erfindungsgemäßen Sauglanze, wobei vergleichbar der Anordnung des Ausführungsbeispiels der 8 drei jeweils über eine eigene Verriegelungseinrichtung mit dem Rohrkörper verriegelten Saugleitungen und eine Messelektronik vorgesehen sind,
• 12 ein weiteres Ausführungsbeispiel in einer Darstellung gemäß 10, wobei hier ein erstes Hohlprofil für die Saugleitung und zur Unterbringung der Messelektronik und ein gesondertes Hohlprofil vorgesehen ist, welches über eine gesonderte Verriegelungseinrichtung an dem Rohrkörper verriegelt wird, und
• 13 ein weiteres Ausführungsbeispiel in einer Darstellung vergleichbar der Darstellung der 12.

Further advantages of the invention emerge from the non-cited subclaims and from the following description of the exemplary embodiments shown in the figures. Show in it:

• 1 a first embodiment of a metering system according to the invention with a metering device with an embodiment of a suction lance according to the invention,
• 2 in an enlarged, partially sectioned illustration in a schematic partially sectioned view approximately according to pitch circle II in FIG 1 a partial area of the suction lance with a float changed in its position in an enlarged individual view,
• 3 an embodiment of a suction lance according to the invention in a cross-sectional representation in a partially sectioned schematic view, approximately along section line III-III in 2 ,
• 4th an embodiment of the suction lance according to the invention in a perspective, exploded schematic and not to scale representation, for example along view arrow IV in 4th , whereby only the tubular body and the hollow profile, but not the float body, are shown,
• 5 a further embodiment of a suction lance according to the invention in a representation according to 3 with a geometrically inverted arrangement of an extension and a receptacle,
• 6th a further embodiment of a suction lance according to the invention in a representation according to 5 , wherein the hollow profile is fixed to the tubular body by means of two partial extensions,
• 7th a further embodiment of a suction lance according to the invention in a representation similar to a part of the representation of FIG 1 , with three suction connection lines going out from the suction lance,
• 8th the embodiment of 7th in a partially sectioned schematic illustration approximately along section line VIII-VIII in 7th , in a representation comparable to the representation of the 3 ,
• 9 Another embodiment of a suction lance according to the invention in a schematic, partially sectioned cross-sectional illustration similar to the illustration in FIG 6th ,
• 10 a further embodiment of a suction lance according to the invention in a representation according to 3 wherein a hollow profile locked to the tubular body by means of a linear locking device has only one chamber - for providing the suction line - and a receiving pocket for a printed circuit board of a measuring electronics is formed on the inside of the tubular body in an area opposite the locking device,
• 11 in a representation comparable to the 10 Another embodiment of a suction lance according to the invention, the arrangement of the embodiment of FIG 8th three suction lines, each locked to the tubular body via their own locking device, and measuring electronics are provided,
• 12th a further embodiment in a representation according to 10 , a first hollow profile being provided here for the suction line and for accommodating the measuring electronics and a separate hollow profile which is locked to the tubular body via a separate locking device, and
• 13th a further exemplary embodiment in a representation comparable to the representation of FIG 12th .

Exemplary embodiments of the invention are described in the following description of the figures, also with reference to the drawings. For the sake of clarity - also as far as different exemplary embodiments are concerned - the same or comparable parts or elements or areas are designated with the same reference symbols, sometimes with the addition of small letters.

Features that are described, illustrated or disclosed only in relation to one exemplary embodiment can also be provided in any other exemplary embodiment of the invention within the scope of the invention. Such modified exemplary embodiments - even if they are not shown in the drawings - are also covered by the invention.

All of the features disclosed are essential to the invention per se. In the disclosure of the application, the disclosure content of the associated priority documents (copy of the prior application) as well as the cited documents and the described devices of the prior art are hereby fully included, also for the purpose of integrating individual or several features of the objects disclosed therein or to be included in several claims of the present application. Such modified exemplary embodiments are also encompassed by the invention - even if they are not shown in the drawings.

Embodiments of suction lances according to the invention are denoted in their entirety in the drawings by the reference number 11 designated.

• Gemäß 1 ist ein Behältnis 12 gezeigt, in dem sich ein flüssiges Medium 13 befindet. Die schematisch angedeutete Füllhöhe, der sogenannte Füllstand, ist in 1 mit 14 bezeichnet.

Based 1 should be explained how a suction lance 11 of the type according to the invention with the other components of a metering system 46 interacts or in a dosing system 46 can be used:

• According to 1 is a container 12th shown in which there is a liquid medium 13th is located. The schematically indicated fill level, the so-called fill level, is in 1 denoted by 14.

The suction lance 11 has a suction lance base 49 on with them on the floor 20th of the container 12th is placed on, or is brought close to it.

The suction lance 11 also has a suction lance head 50 on the top of the lid 60 of the container 12th protrudes.

Via a suction line 44 is the suction lance head 50 with a metering device 10 tied together. The dosing device 10 can, for example, as shown schematically in 1 shown, a peristaltic pump 45 include. Other types of pumps, e.g. B. centrifugal pumps, diaphragm pumps, etc. come into consideration according to the invention.

The dosing device 10 serves the medium 13th from the container 12th and a target device 21 to feed. The target device 21 can e.g. B. be a washing machine or dishwasher, or another target device or target vessel to which the medium 13th should be promoted.

It should be noted that the metering device 10 - which is not shown in the figures - can also be connected on the input side to several containers in which the same or different media can be arranged. You can also use a metering device 10 several target devices can be connected, so that the metering device 10 ensures that different media can be successively fed from different containers to the different target devices at specific times.

In this regard, reference is also made to the patent applications and patents of the applicants mentioned at the beginning.

According to the embodiment of 1 instructs the metering device 10 a controller 15th on, the z. B. can be provided by a microprocessor, or can comprise a microprocessor. The control 15th is via an electrical or electronic connection line 43a with an engine 17th tied together. This can be via an active line 43b , e.g. B. via a gear or via a V-belt or toothed drive or the like, a rotor 16 set in rotation and drive. The rotor 16 points at its end - as with peristaltic pumps 45 usual - rollers on the successively propagating areas of the inside of the peristaltic pump 45 running hose sections 18th squeezing and through the propagating squeezing the medium 13th through the peristaltic pump 45 through, from their inlet 58 to their outlet 59 , support financially.

On the suction side of the peristaltic pump 45 , i.e. upstream of the inlet 58 , a negative pressure is generated in this respect, which is over the suction line 44 medium 13th from the container 12th sucks.

The suction lance 11 may have an axial length L equal to the height H of the container 12th corresponds to or almost corresponds to or even exceeds this. As in 1 shown, the suction lance head 50 from the lid 60 the container also step out.

The suction lance 11 comprises a tubular body 26th who evidenced 3 has a substantially circular cross-section.

In an interior 47 of the pipe body 26th are a hollow profile 27 and a float 22nd arranged. The hollow profile 27 includes in the embodiment of 3 two chambers, namely a first chamber 28 and a second chamber 29 .

The second chamber 29 provides a suction line 19th , 53 ready. The chamber 29 is therefore designed as a hollow chamber. The second chamber 29 can be in the area of the suction lance base 49 , as in 1 indicated by a valve ball 61 be lockable. It is in the area of the suction lance head 50 directly or indirectly with the suction connection line 44 , and thus with the peristaltic pump 45 , tied together.

The first chamber 28 serves to accommodate measuring electronics 52 .

• 2 zeigt die Messelektronik 52 in einer schematischen Schaltbilddarstellung, wobei eine Reihe von Widerständen 24a, 24b, 24c, 24d und eine Reihe von Schaltern 23a, 23b, 23c, 23d angedeutet sind. Nur der Schalter 23b befindet sich in Schließstellung. Die übrigen Schalter 23a, 23c, 23d befinden sich in einer Offenstellung.

This is done in the first chamber 28 a circuit board 30th housed on which a large number of electronic components can be arranged:

• 2 shows the measuring electronics 52 in a schematic circuit diagram showing a number of resistors 24a , 24b , 24c , 24d and a number of switches 23a , 23b , 23c , 23d are indicated. Just the switch 23b is in the closed position. The remaining switches 23a , 23c , 23d are in an open position.

The float body 22nd is in an annulus or movement space 47 between an inner peripheral surface 55 of the pipe body 26th and an outer peripheral surface 54 of the hollow profile 27 arranged.

The float body 22nd always floats on the medium 13th on what is in the schematic diagram of the 1 is indicated.

The float body 22nd has in the embodiment in the figures a z. Am 2 indicated magnets 25th on.

The float body 22nd is in the axial direction 48 relocatable. The float body is advantageously along the entire axial extent of the suction lance 11 movable. It is used to keep different filling levels of the container 12th to display.

In the different axial positions of the float body 22nd can the float 22nd associated magnet 25th exactly one of the several different switches 23a , 23b , 23c , 23d actuate.

2 shows an axial position of the float body 22nd in which the switch 23b closed is.

The measuring electronics 52 can in this respect in different axial positions of the float body 22nd assume or output or query different switching states or different resistance values. In any case, information about the state of the measuring electronics 52 and thus indirectly information about the current level of the container 12th to the controller 25th be transmitted.

The dosing device 10 can take this information into account when performing dispensing processes. For example, corresponding reorder commands can be output or corresponding fill levels can be displayed to the operators.

The board 30th can from a potting compound 31 be surrounded so that the chamber 28 is completely closed.

In the embodiments of the suction lance according to the invention 11 is a locking device 42 provided with the hollow profile 27 and the pipe body 26th are lockable to one another.

In the embodiment of 3 shows this the hollow profile 27 a recording 33 on. On the pipe body 26th on the other hand is an extension 32 arranged to the inclusion 33 is designed to be complementary in shape or essentially complementary in shape. In particular, it is provided that the extension 32 a widening section 51 having. According to the analogy, the receptacle has a narrowing section 70 on.

The narrowing section 70 is the narrowest part of the recording 33 . The widening section 51 has a larger dimension or extension than the narrowing section. This geometric design ensures that a fastening of the hollow profile 27 and tubular body 26th to each other is only possible by an axial plugging movement, and a locking is achieved in a direction transverse to the axial direction.

As 4th makes clear schematically and not to scale, the hollow profile 27 as a result of an axial plugging and sliding movement in the tubular body 26th are used, with the mutually complementary recording 33 and appendix 32 be plugged into each other.

The hollow profile 27 is - just like the pipe body 26th - a cylindrical body.

The recording 33 and the two chambers 28 , 29 extend in this respect over the entire axial length of the hollow profile 27 .

As a result of an interlocking of the appendage 32 and the recording 33 a form fit is created. The two elements 26th , 27 are locked to one another via this form fit. So that is the locking device 42 overall linear and extends - based on 1 - Advantageously from the suction lance head 50 up to the suction lance base 49 .

Alternatively, the locking device extends 42 at least from one end of the tubular body 26th to the other end of the pipe body 26th .

Through the defined positioning of the hollow profile 27 relative to the hollow body 26th along the entire axial length L of the suction lance 11 or at least along a substantial part of the axial length L of the suction lance 11 becomes a clearly defined space for movement 34 for the float body 22nd provided. The float body 22nd can move freely and freely along its travel path.

• Sie kann trotz ihrer großen axialen Länge von beispielsweise 100 cm, oder sogar noch darüber hinaus, weniger leicht verbiegen.

Due to the locking device, which is designed in a linear manner 42 becomes the suction lance 11 dimensionally stable to a special degree:

• Despite its great axial length of, for example, 100 cm, or even more, it can bend less easily.

In the embodiment of 3 is the float body 22nd substantially horseshoe-shaped. The float body 22nd here comprises an essentially I-shaped profile. The profile can also be called clasp-like.

• Hier ist ein Fortsatz 36 an dem Hohlprofil 27 angeordnet, und eine Aufnahme 35 ist bei dem Ausführungsbeispiel an dem Rohrkörper 26 angeordnet.

In the embodiment of 5 is a related to the embodiment of the 3 geometrically inverted arrangement made:

• Here is a continuation 36 on the hollow profile 27 arranged, and a recording 35 is in the embodiment on the tubular body 26th arranged.

A further alternative embodiment is shown schematically 6th : Here are on the hollow profile 27 two partial processes 37a , 37b arranged in corresponding partial recordings 38a , 38b on the pipe body 26th intervention.

The choice of the number of partial processes 37 and the number of partial recordings 38 is left to the expert as desired.

The invention also includes exemplary embodiments (not shown) that are based on a hollow profile 27 several partial recordings and on the tubular body 26th provide several partial processes.

Embodiments of suction lances are also part of the invention 11 includes which, as in the embodiment of 7th shown, in the area of the suction lance head 50 not just a suction line 44 for connection to a dosing device 10 include, but several suction connection lines 44a , 44b , 44c for connection to several metering devices.

In this respect, a suction lance is used here 11 provided that several suction lines in its interior 43a , 43b , 43c having.

• Bei einer ersten Variante sind innerhalb des Rohrkörpers mehrere Hohlprofile 27 angeordnet, die jeweils eine eigene Saugleitung aufweisen. Bei einer Alternative ist innerhalb des Rohrkörpers 26 ein Hohlprofil 27 angeordnet, welches mehrere Saugleitungen aufweist.

The exemplary embodiments of suction lances according to the invention, which have several suction lines, can be designed as follows:

• In a first variant there are several hollow profiles within the tubular body 27 arranged, each having its own suction line. One alternative is within the tubular body 26th a hollow profile 27 arranged, which has several suction lines.

In the embodiment of 1 it is provided that the measuring electronics 52 via a signal line 43c with the controller 15th connected is. Via this signal line 43c can control 15th In other words, query the fill level or, to be more precise, a certain switching state of the measuring electronics 52 Interrogate.

In the embodiment of 7th and 8th , in which the suction lance 11 via several suction connection lines 44a , 44b , 44c is connected to several metering devices, it can be provided that the suction lance 11 via just a single electronic connection line 43c is connected to a single metering device. However, the invention can also encompass when the suction lance 11 is connected to several metering devices via several electronic connection lines.

The embodiment of the 7th and 8th shows a suction lance 11 , with three profiles 39 , 40 , 41 are provided.

The first profile 39 basically corresponds to the profile in its structure 27 according to 3 , and has two chambers 28 , 29a on.

The suction lance 11 according to the 7th and 8th has two additional profiles 40 and 41 on, each with only one hollow chamber 29b , 29c include that as a suction line 53b , 53c serves.

• Hier ist deutlich, dass die Kammer 29 zur Bereitstellung einer Saugleitung 53 vorzugsweise einen kreisrunden Querschnitt aufweist. Bei dem Ausführungsbeispiel der 9 sind zwei Teilfortsätze 37a, 37b vorgesehen, die pilzkopfartig verbreitert sind, und in den entsprechenden Teilaufnahmen 38a, 38b in den Rohrkörper 26 eingreifen.

Another embodiment shows 9 :

• Here it is clear that the Chamber 29 to provide a suction line 53 preferably has a circular cross section. In the embodiment of 9 are two partial processes 37a , 37b provided, which are widened like a mushroom head, and in the corresponding partial recordings 38a , 38b into the pipe body 26th intervention.

The chamber 28 to accommodate the measuring electronics 52 has in the embodiment of 9 a groove arrangement 62 to which the in 9 circuit board, not shown, can be inserted, and in this way a particularly simple, advantageous and precise fastening of the measuring electronics 52 in the associated chamber 28 permitted.

A dosing device 46 of the type according to the invention can according to 1 only one suction lance 11 include. Dosing systems are also part of the invention 46 comprising a plurality of suction lances 11 include.

In the embodiment of 1 it is indicated that the float body 22nd between a lower stop surface 57 and an upper stop surface 56 is relocatable.

The exemplary embodiments show suction lances 11 who have favourited a float 22nd include that along a large part or along almost the entire axial length L of the suction lance 11 are relocatable.

The invention also includes suction lances, not shown, in which a float body or also several float bodies are provided, each of which only extends over a fraction of the axial length of the suction lance 11 are relocatable. In the last-described embodiment, a large number of stop surfaces can be provided for the different float bodies.

• Hier ist das Hohlprofil 27 mit nur einer Hohlkammer 29 ausgestattet, die die Saugleitung 53 bereitstellt. Die Verriegelungseinrichtung 42 ist bei diesem Ausführungsbeispiel geringfügig unterschiedlich ausgebildet:
  • Eine Aufnahme 35 ist an der Innenwandung des Rohrkörpers 26 angeordnet, und ein Fortsatz 36, also eine Art Verbreiterungsabschnitt, gebildet von Teil-Fortsätzen, ist an dem Hohlprofil 27 angeordnet.

According to 10 is an embodiment of the suction lance 11 in a cross-sectional view comparable to the 3 shown:

• Here is the hollow profile 27 with only one hollow chamber 29 equipped that the suction line 53 provides. The locking device 42 is designed slightly different in this embodiment:
  • A recording 35 is on the inner wall of the tubular body 26th arranged, and an appendix 36 , so a kind of widening section, formed by partial extensions, is on the hollow profile 27 arranged.

Furthermore is on the inside of the pipe body 26th a profile 71 molded with, which has a recording space 72 or a chamber 28 to accommodate the measuring electronics 52 trains. The measuring electronics 52 includes in particular a circuit board shown only schematically 73 and affixed to it, in 10 electronic components, not shown 74 . The measuring electronics 52 can also enter the chamber in the axial direction 28 used and housed there.

In the embodiment of 10 are the hollow profile 27 and the measurement electronics 52 arranged about 180 ° opposite one another.

Other relative positions are also conceivable and encompassed by the invention.

In the embodiment of 10 indicates the float body 22nd a contour that is designed in the manner of a bat's wing - a kind of Batman structure.

By attaching the measuring electronics 52 on the pipe body 26th - separate from the hollow profile 27 - can e.g. B. also the surface of the float body 22nd be enlarged.

• Hier sind drei Hohlprofile 27a, 27b, 27c jeweils 120° umfangsversetzt mittels gesonderter Verriegelungseinrichtungen 42a, 42b, 42c an dem Rohrkörper 26 festgelegt.

In the embodiment of 11 FIG. 13 is a structure similar to that of the embodiment of FIG 10 met:

• Here are three hollow sections 27a , 27b , 27c each 120 ° circumferentially offset by means of separate locking devices 42a , 42b , 42c on the pipe body 26th set.

Again, comparable to the illustration of the exemplary embodiment, FIG 8th - only one measuring electronics 52 intended.

The float body 22nd is in the embodiment of 11 shaped like a three-leaf clover. The float body comprises three lobe-shaped areas, each of which is between two of the hollow chamber profiles 27a , 27b , 27c extend into it.

It should be noted that in each case between the outer contour of the float body 22nd and the inner contour of the tubular body 26th or the inner contour of the hollow chamber profiles 27a , 27b , 27c a movement space B is shown, the movement of the swimmer 22nd relative to the tubular body 26th enables.

• Auch hier erfolgt eine Unterbringung der Messelektronik 52 gesondert von dem Hohlprofil 27a, welches die Saugleitung 53 bereitstellt:
  • Bei dem Ausführungsbeispiel der 12 ist ein erstes Hohlkammerprofil 27a über eine Verriegelungseinrichtung 42a an dem Rohrkörper 26 festgelegt. Das erste Hohlkammerprofil 27a stellt die Saugleitung 53 bereit.

12th shows a further embodiment of a suction lance according to the invention in a representation comparable to that 10 :

• The measuring electronics are also accommodated here 52 separately from the hollow profile 27a , which is the suction line 53 provides:
  • In the embodiment of 12th is a first hollow chamber profile 27a via a locking device 42a on the pipe body 26th set. The first hollow chamber profile 27a provides the suction line 53 ready.

• Das zweite Hohlkammerprofil 27b stellt die Hohlkammer 28 zur Aufnahme der Messelektronik 52 bereit. Die Messelektronik 52 kann wiederum eine Platine und darauf angeordnete elektronische Bauelemente umfassen.

In addition, there is a second hollow chamber profile 27b via a second locking device 42b on the pipe body 26th fixed:

• The second hollow profile 27b represents the hollow chamber 28 to accommodate the measuring electronics 52 ready. The measuring electronics 52 can in turn comprise a circuit board and electronic components arranged thereon.

The float body 22nd has in the embodiment of 12th has a changed contour, and only includes two lobe-shaped areas.

• Dieses Ausführungsbeispiel entspricht von seinen Grundzügen her der Darstellung des Ausführungsbeispiels der 12:
  • Bei dem Ausführungsbeispiel der 13 ist ein Hohlprofil 27a über eine erste Verriegelungseinrichtung 42a an dem Rohrkörper 26 befestigt. Das erste Hohlkammerprofil 27a stellt eine Saugleitung 53 bereit.

Finally, a further exemplary embodiment of a suction lance according to the invention is shown 13th :

• This exemplary embodiment corresponds in its basic features to the representation of the exemplary embodiment in FIG 12th :
  • In the embodiment of 13th is a hollow profile 27a via a first locking device 42a on the pipe body 26th attached. The first hollow chamber profile 27a provides a suction line 53 ready.

• Hier wird von dem offenen Hohlkammerprofil 27b eine offene Aufnahmekammer 28 bereitgestellt, die ebenfalls zur Aufnahme der Messelektronik 52 dient. Die Kammer 28 ist also gegenüber dem Medium nicht geschlossen, mit der Folge, dass das Medium mit der Messelektronik 52 in Kontakt treten oder diese benetzen kann.

From the first hollow profile 27a is separately via a locking device 42b a second hollow chamber profile 27b attached, but which in the embodiment of 13th - In contrast to the embodiment of the 12th - as an open hollow chamber 28 is trained:

• Here is from the open hollow profile 27b an open receiving chamber 28 provided, which is also used to accommodate the measurement electronics 52 serves. The chamber 28 is therefore not closed to the medium, with the consequence that the medium with the measuring electronics 52 can come into contact or wet them.

The measuring electronics 52 can be provided with a special coating in this exemplary embodiment, in particular with a non-stick coating, as is the case, for example, in the German patent application DE 10 2018 106 045 A1 the applicant is described.

In this embodiment, the locking device is used 42b according to 13th the holder and fixing and locking of the measuring electronics 52 .

Also in the embodiment of 13th is the locking device 42b designed in such a way that the measuring electronics 52 captive in the assembled state on the pipe body 26th is held.

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 102018106045 A1 [0006, 0133]
• DE 102018110155 A1 [0007, 0020]
• DE 102019131381 A1 [0008, 0016, 0028]
• DE 102019109793 A1 [0037]
• DE 102015107976 A1 [0037]
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Claims (15)

Suction lance (11) for removing a liquid medium (13) from a container (12), comprising a suction lance base (49) for placing on a base (20) of the container and a suction lance head (50) for connection to a metering device (10), a tubular body (26) extending between the suction lance head and the suction lance base in the axial direction (48), in the interior (47) of which a float body (22) and a hollow profile (27) are arranged, the hollow profile (27) being designed in a linear manner , locking device (42) extending in the axial direction is attached to the tubular body (26). Suction lance Claim 1 , characterized in that the hollow profile (27) can be fixed in a form-fitting manner on the tubular body (26) as a result of an axial insertion or sliding movement. Suction lance Claim 1 or 2 , characterized in that the locking device (42) has at least one extension (32, 36) with a widening section (51) and at least one receptacle (33, 35) which is complementary in shape to the extension (32, 36). Suction lance Claim 3 , characterized in that the receptacle (35) is arranged on the tubular body (26) ( 5 ). Suction lance Claim 3 , characterized in that the receptacle (33) is arranged on the hollow profile (27) ( 3 ). Suction lance according to one of the preceding claims, characterized in that the float body (22) is at least partially designed like a horseshoe. Suction lance Claim 6 , characterized in that the float body (22) at least partially surrounds the hollow profile (27) on the outside. Suction lance according to one of the preceding claims, characterized in that several hollow profiles (39, 40, 41) are provided, each of which is fastened to the tubular body (26) by means of its own locking device (42a, 42b, 42c) or via a common locking device. Suction lance according to one of the preceding claims, characterized in that the hollow profile (27) has several chambers (28, 29), at least one chamber (28) serving to accommodate measuring electronics (52) and at least one chamber (29) having a suction line (53) provides. Suction lance Claim 9 , characterized in that at least one chamber (28) is closed or sealed, in particular is filled with a potting compound (31). Suction lance according to one of the preceding claims, characterized in that a movement space for the float body (22) is provided between an outer circumferential surface (54) of the hollow profile (27) and an inner circumferential surface (55) of the tubular body (26), the float body (22) is arranged to be movable along the axial direction (48). Suction lance Claim 11 , characterized in that the float body (22) actuates different switches (23a, 23b, 23c) of a measuring electronics (52) in different axial positions. Suction lance according to one of the preceding claims, characterized in that the float body (22) has at least one magnet (25). Suction lance according to one of the preceding claims, characterized in that the suction lance (11) has an upper stop surface (56) and a lower stop surface (57) for the float body. Suction lance according to one of the preceding claims, characterized in that the suction lance has measuring electronics (52) which can be connected to a control (15) of a metering device (10).

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