DE102016103968B4 - Stirrer, in particular jet mixer and stirring device comprising a stirrer - Google Patents

Abstract

Stirrer (10), in particular Leitstrahlmischer, with a about a drive shaft (12) rotatably driven and rotor blades (16) having rotor (14) for stirring media in a container, with a drive (18) for driving the rotor (14), with a drive shaft (20) arranged concentrically with the drive axis (12), which connects the drive (18) to the rotor (14), and with a stator (22) which radially surrounds the rotor (14), wherein at least one rod-like connecting means (20) 28) is provided, which connects the stator (22) to the drive (18), wherein at least one cleaning agent channel with at least one channel inlet and at least one channel outlet (40, 44, 46, 48) is provided and wherein at least one rod-like connecting means (28) at least one channel outlet (40, 44, 46, 48) is provided for cleaning agent, which is arranged such that cleaning agent on exiting the channel outlet (40, 44, 46, 48) on soiled components of the stirrer (10), characterized in that the at least one rod-like connecting means (28) is arranged radially adjacent to the drive shaft (20) and that a plurality of rod-like connecting means (28), preferably three to five rod-like connecting means (28), more preferably four rod-like Connecting means (28) are provided, which are arranged radially around the drive shaft (20) around.

Description

This invention relates to a stirrer according to the preamble of claim 1. This is in particular a jet mixer, with a rotatably driven about a drive axis and rotor blades having rotor for stirring media in a container, with a drive for driving the rotor, with a concentric to the drive shaft arranged drive shaft which connects the drive to the rotor, and with a stator which surrounds the rotor radially, wherein at least one connecting tube is provided, which connects the stator to the drive.

Such stirrers are used to mix media, e.g. Liquids or viscous media disposed in containers having a container interior with a receiving volume for the liquids or media. It is known to attach these stirrers with a mounting flange on an outer wall of the container or on a container bottom or container lid such that a part of the stirrer, preferably the drive of the stirrer, is arranged outside the container and that another part of the stirrer, which comprises the rotor and the stator, is arranged inside the stirrer. The stirrers are usually bolted to the containers by means of the mounting flange.

The so-called Leitstrahlmischer are advantageous because the example tubular stator and a rotatable about a concentric to the drive shaft axis driving rotor rotation or turbulence of the liquid to be stirred or media can be avoided. As a result, vertical mixing in the direction of the container can be ensured. Such Leitstrahlmischer are for example from the DE 35 17 655 C2 and the EP 1 470 856 B1 known. Mixers with features of the preamble of claim 1 are further from the DE 32 21 509 A1 , of the DE 10 2010 051 275 A1 , of the US 4,437,765 A and the DE 27 26 800 A1 known.

A disadvantage of the known stirrers or jet mixers has been found to be that the components of the jet stream mixers which protrude into the container interior, i. In particular, the tubular stator, the connecting tubes, the drive shaft, as well as the rotor and the mechanical seal, can become dirty when stirring the media. Due to the permanent screwing of the stirrer with the container, a cleaning of the jet mixer is problematic, the container or the container interior are often difficult to access for cleaning. Therefore, short-term deposits can adhere to the components of the stirrer or the jet mixer and so permanently pollute them.

The invention is therefore based on the object of avoiding permanent soiling (for example on mechanical seals) in a stirrer, in particular in a jet mixer.

This object is achieved by a stirrer with the features of claim 1. Such a stirrer is characterized in that the at least one rod-like connecting means is arranged radially adjacent to the drive shaft and that a plurality of rod-like connecting means, preferably three to five rod-like connecting means, more preferably four rod-like connecting means are provided which are arranged radially around the drive shaft.

The cleaning agent may e.g. be supplied from a detergent tank. It is conceivable to use as a cleaning liquid, in particular water or a mixture of a surfactant and water, it being possible to supply the surfactant from the detergent tank, wherein for the water either a water tank or a fresh water connection is provided. It is conceivable that the detergent tank or the fresh water connection is connected to the channel inlet, wherein a pump may be provided which is designed such that cleaning agent at a pressure in the range of about 3 to 9 bar, preferably from about 6 bar the soiled components is passed.

In the present case, contaminated components are understood in particular to mean components which, when used as intended, may come into contact with the media to be stirred. Contaminated components can therefore be in particular all components of the stirrer which are arranged in the container interior when arranged on a container stirrer.

Advantageously, the stator of the stirrer is designed as a cylinder-section-like or tubular with a circular cross-section and arranged concentrically to the drive axis. It is particularly advantageous if the stator is cylindrical at its end facing away from the drive, wherein it widens conically at its end facing the drive toward the drive.

In order to enable the most uniform possible arrangement and thus also the most uniform possible introduction of force and uniform cleaning effect, it is advantageous if the connecting means are arranged at equal distances from each other. If, for example, 3 connecting means are provided, it is advantageous if the connecting means are arranged at an angle of 120 ° to each other, at 4 connecting means at an angle of 90 ° and at 5 connecting means at an angle of 72 °.

The rod-like connecting means is advantageously designed as a connecting pipe, ie of a pipe with a tube wall surrounding a pipe wall. Thus, the tubes themselves can serve as a connection between the stator and drive and as a detergent channel.

In order to facilitate the simplest possible attachment of the stirrer to a container, it is advantageous if the stirrer has a mounting flange for attachment in a container for media to be stirred, wherein the mounting flange divides the stirrer into a container outer region and a container inner region, which is in contact with the Media comes into contact. Advantageously, the channel outlet for the cleaning agent is thus arranged such that the cleaning agent is passed on exit from the channel outlet to the components of the stirrer, which are arranged in the container interior.

Since each channel outlet usually has only one cleaning agent exit direction, it is particularly advantageous if a plurality of channel outlets for cleaning agent is provided, so that as many different components of the stirrer can be cleaned.

In order to be able to conduct the cleaning agent in a simple manner to the at least one channel outlet, it can be provided that the at least one cleaning agent channel runs at least in sections in the at least one rod-like connecting means or connecting tube. It is particularly advantageous if the detergent channel is at least partially formed by the connecting tube, so that no hoses or the like must be installed in the connecting pipe. For this purpose, the pipe interior of the connecting pipe can form the detergent channel.

A particularly easy-to-clean and low-maintenance development of the stirrer provides that a mechanical seal is provided which seals the drive to the drive shaft, wherein at least one channel outlet is provided, which is arranged such that cleaning agent on exiting the duct outlet directly to the mechanical seal is directed. Thus, fouling of the mechanical seal, which is advantageously arranged concentrically to the drive axis in the mounting flange, and consequently a penetration of dirt into the drive, as well as wear of the mechanical seal can be avoided.

According to a further easy-to-clean development of the stirrer is provided that the at least one rod-like connecting means or connecting tube projects beyond the stator at its free end in the axial direction, wherein at least one channel outlet is provided at the free end, which is arranged such that cleaning agent at the outlet is passed from the channel outlet on the rotor and / or the rotor blades. The free end is the end of the connecting means facing away from the drive. Advantageously, the at least one connecting means at the free end at an angle of preferably 45 ° radially inwardly slanted, so that the channel outlet is aligned radially inward to the drive shaft.

In a further development of the stirrer, which also enables easy cleaning of the rod-like connecting means, at least two such rod-like connecting means are provided, wherein at least one channel outlet is provided in a first connecting means, which is arranged such that cleaning agent exits the channel outlet to a second connecting means is directed. Advantageously, 3 or more rod-like connecting means are provided, so that a detergent jet emerging from the respective channel outlets of the connecting means is not shaded by the drive shaft.

In order to be able to easily clean the stator, it has proved to be advantageous if the at least one rod-like connecting means or connecting tube is arranged radially outside the stator and if at least one channel outlet is provided which is arranged such that cleaning agent exits from the channel outlet on one Stator outer surface is passed.

It is particularly preferred if the at least one channel outlet is arranged on a projection which extends in a plane perpendicular to the drive axis and tangential to the stator. Advantageously, the projection has two channel outlets, wherein a channel outlet is arranged such that cleaning agent is passed onto the cylindrical stator section on exit from the channel outlet and a channel outlet is arranged such that cleaning agent is directed onto the conical stator section on exit from the channel outlet.

Advantageously, the channel outlets are designed as spray nozzles arranged on the connecting means or connecting pipes and / or as openings in the connecting means or connecting pipes.

The above-mentioned object is also achieved by a stirring device for stirring media having the features of claim 12. Such a stirring device comprises a container for media to be stirred and a stirrer arranged in the container for at least one of Claims 1 to 13, and a pump for conveying cleaning agent, which is fluidly connected to the inlet of the at least one detergent channel. Advantageously, the pump is designed such that cleaning agent is passed at a pressure of about 3 bar to about 9 bar, preferably from about 6 bar to dirty components of the stirrer.

The invention will be described in more detail below with reference to FIGS.

• 1 eine perspektivische Ansicht einer ersten Ausführungsform eines erfindungsgemäßen Rührers;
• 2 einen Ausschnitt einer perspektivischen Ansicht einer zweiten Ausführungsform des erfindungsgemäßen Rührers;
• 3 eine erste Seitenansicht des Rührers gemäß 2 mit schematisch angedeuteten Reinigungsmittelstrahlen;
• 4 die Seitenansicht gemäß 3 mit weiteren schematisch angedeuteten Reinigungsmittelstrahlen;
• 5 eine Unteransicht des Rührers gemäß 2 mit schematisch angedeuteten Reinigungsmittelstrahlen; und
• 6 die Unteransicht gemäß 5 mit weiteren schematisch angedeuteten Reinigungsmittelstrahlen.

Show it:

• 1 a perspective view of a first embodiment of a stirrer according to the invention;
• 2 a detail of a perspective view of a second embodiment of the stirrer according to the invention;
• 3 a first side view of the stirrer according to 2 with schematically indicated detergent jets;
• 4 the side view according to 3 with further schematically indicated detergent jets;
• 5 a bottom view of the stirrer according to 2 with schematically indicated detergent jets; and
• 6 the bottom view according to 5 with further schematically indicated detergent jets.

In the 1 to 6 are a total of two embodiments of an inventive designed as a jet mixer stirrer 10 shown.

The stirrer 10 has one about a drive axle 12 rotatably driven rotor 14 for stirring media in a container, not shown in the figures, for the media to be stirred. The rotor 14 again has three rotor blades 16 in particular in the 1 . 2 . 5 and 6 are clearly visible.

The stirrer 10 also has an electric drive 18 for driving the rotor 14 , as well as a concentric to the drive axle 12 arranged drive shaft 20 on that the rotor 14 with the drive 18 combines.

The stirrer 10 further includes a tubular stator 22 on, the rotor 14 radially surrounds. The stator 22 points to his drive 18 opposite end of a circular cylindrical section 24 , as well as its the drive 18 facing the end of a conical section 26 up, towards the drive 18 expands.

The stator 22 is in the embodiment according to 1 by means of three rod-like connecting means with the drive 18 connected. The rod-like connecting means are of connecting pipes 28 educated. The stator 22 is in the embodiment according to the 2 to 6 through four connecting pipes 28 with the drive 18 connected. The connecting pipes 28 are radial, ie perpendicular to the drive axis 12 next to the drive shaft 20 arranged.

The connecting pipes 28 are radially around the drive shaft 20 arranged around, so that in the embodiment according to 1 the connecting pipes 28 are arranged at an angle of 120 ° to each other, wherein the connecting pipes 28 in the embodiment according to the 2 to 6 are arranged at an angle of 90 ° to each other.

The stirrer 10 points between the drive 18 and the stator 22 a mounting flange 30 on, from which the connecting pipes 28 to the stator 22 extend. The mounting flange 30 serves to attach the stirrer 10 in a container for media to be stirred and has for screwing with this container at its periphery a plurality of mounting holes 32 on. The mounting flange 30 shares the stirrer 10 in a container outer area 34 who in 1 above the mounting flange 30 is arranged and the drive 18 includes, as well as in a container interior 36 which can be arranged inside a container and therefore comes into contact with the media to be stirred. In the 2 to 6 is only the container interior 36 of the stirrer 10 shown. The stirrer 10 points in the area of the mounting flange 30 a mechanical seal 38 on that the drive 18 on the drive shaft 20 seals so that no dirt in the drive 18 can penetrate.

The stirrer 10 has a plurality of detergent channels, not shown in the figures, with at least one central channel inlet and a plurality of channel outlets for detergent. The duct outlets are on the connecting pipes 28 arranged such that cleaning agent on exit from the channel outlets on soiled components of the stirrer 10 is directed. Under contaminated components are understood to mean components that can come into contact with the liquids or media to be stirred. Soiled components can therefore all components of the stirrer 10 be in the case of arranged on a container stirrer 10 are arranged in the container interior. These are therefore the components of the container interior 36 below the mounting flange 30 in 1 , The duct outlets can be as on the connecting pipes 28 arranged spray nozzles or as openings or holes in the connecting pipes 28 be educated.

It is conceivable, a channel inlet on the stirrer 10 be designed so that detergent can be supplied from a detergent tank. As a cleaning agent, a liquid, in particular water or a mixture of a surfactant and water may be used, it being possible to supply the surfactant from the detergent tank, and to supply the water either from a water tank or on the stirrer 10 to arrange a fresh water connection.

Furthermore, a pump, also not shown in the figures, is provided, which is designed such that cleaning agent is conducted at a pressure in the range of about 3 to 9 bar, preferably of about 6 bar to the soiled components.

The detergent channels run at least in sections in the connecting pipes 28 or the detergent channels are at least partially from the connecting pipes 28 educated. However, it is also conceivable in the connecting pipes 28 Provide hoses that form the detergent channels.

The stirrer 10 points to the connecting pipes 28 in the 2 and 4 port outlets shown 40 on, which are arranged and aligned so that detergent when exiting the channel outlets 40 directly on the mechanical seal 38 is directed. Thus, a permanent contamination of the mechanical seal 38 and a concomitant intrusion of dirt into the drive 18 be prevented.

As in the 1 to 4 can also be clearly seen, project beyond the connecting pipes 28 the stator 22 at her free end 42 in the axial direction, ie in the direction of the drive axle 12 , At the free end 42 the connecting pipes 28 are each channel outlets 44 provided, which are arranged such that cleaning agent when exiting the channel outlets 44 on the rotor 14 and / or the rotor blades 16 is directed. These are the connecting pipes 28 at her free end 42 at an angle of about 45 ° inwards, ie towards the stator 22 beveled. The duct outlets 44 especially in the 2 and 6 clearly visible.

To the connecting pipes 28 even easy to clean, are on the connecting pipes 28 also duct outlets 46 provided, which are arranged such that cleaning agent when exiting the channel outlets 46 on a respective other connecting pipe 28 is directed. These duct outlets 46 are in the 2 and 4 to recognize. If, as in the embodiment according to 1 only three connecting pipes 28 are provided, a shading of the spray jets by the drive shaft 20 do not occur. However, as in the embodiment according to the 2 to 6 four connecting pipes 28 are provided, it is particularly advantageous if the channel outlets 46 a connecting pipe 28 on the adjacent connecting pipe 28 are aligned, since at diagonally opposite connecting pipes 28 otherwise shading by the drive shaft 20 would be done.

As also clearly seen in the figures, the connecting pipes are 28 radially, ie in a direction perpendicular to the drive axis 12 , outside the stator 22 arranged, with channel outlets 48 are provided, which are arranged such that cleaning agent at the exit from the channel outlets 48 on a stator outer surface 50 is directed (cf. 2 to 5 ).

It is particularly advantageous if the channel outlets 48 to projections, not shown in the figures 52 are arranged, which are in a plane perpendicular to the drive axis 12 and tangential to the stator 22 extend. Advantageously, these projections 52 2 channel outlets each 48 on, allowing detergent when exiting the duct outlets 48 on the one hand to the cylindrical stator section 24 and on the other hand, on the conical stator section 26 is directed.

Overall, therefore, a stirrer 10 with duct outlets 40 . 44 . 46 . 48 provided, which is particularly easy to clean and thus permanent soiling can be avoided.

Claims (12)

Stirrer (10), in particular Leitstrahlmischer, with a about a drive shaft (12) rotatably driven and rotor blades (16) having rotor (14) for stirring media in a container, with a drive (18) for driving the rotor (14), with a drive shaft (20) arranged concentrically with the drive axis (12), which connects the drive (18) to the rotor (14), and with a stator (22) which radially surrounds the rotor (14), wherein at least one rod-like connecting means (20) 28) is provided, which connects the stator (22) to the drive (18), wherein at least one cleaning agent channel with at least one channel inlet and at least one channel outlet (40, 44, 46, 48) is provided and wherein at least one rod-like connecting means (28) at least one channel outlet (40, 44, 46, 48) is provided for cleaning agent, which is arranged such that cleaning agent on exiting the channel outlet (40, 44, 46, 48) on soiled components of the stirrer (10) is conducted, characterized in that the at least one rod-like connecting means (28) is arranged radially adjacent to the drive shaft (20) and that a plurality of rod-like connecting means (28), preferably three to five rod-like connecting means (28), more preferably four rod-like connecting means (28) are provided which are arranged radially around the drive shaft (20) around. Stirrer (10) after Claim 1 , characterized in that the rod-like connecting means is designed as a connecting tube (28). Stirrer (10) after Claim 1 or 2 characterized in that the agitator (10) includes a mounting flange (30) for mounting in a container for media to be contacted, the mounting flange (30) dividing the agitator into a container outer region (34) and a container interior region (36) associated with comes into contact with the media to be touched. Stirrer (10) according to at least one of the preceding claims, characterized in that a plurality of channel outlets (40, 44, 46, 48) is provided for cleaning agent. Stirrer (10) according to at least one of the preceding claims, characterized in that the at least one cleaning agent channel extends at least in sections in the at least one rod-like connecting means (28). Stirrer (10) according to at least one of the preceding claims, characterized in that a mechanical seal (38) is provided, which seals the drive (18) on the drive shaft (20), wherein at least one channel outlet (40) is provided, which is arranged is that detergent is discharged directly from the channel outlet (40) on the mechanical seal (38). Stirrer (10) according to at least one of the preceding claims, characterized in that the at least one rod-like connecting means (28) projects beyond the stator (22) at its free end (42) in the axial direction, wherein at least one channel outlet at the free end (42) (44) is provided, which is arranged such that cleaning agent when exiting the channel outlet (44) on the rotor (14) and / or the rotor blades (16) is passed. Stirrer (10) according to at least one of the preceding claims, characterized in that at least two rod-like connecting means (28) are provided, wherein at least one channel outlet (46) in a first rod-like connecting means (28) is provided, which is arranged such that cleaning means at the exit from the channel outlet (46) on a second rod-like connecting means (28) is passed. Stirrer (10) according to at least one of the preceding claims, characterized in that the at least one bar-like connecting means (28) is arranged radially offset outside the stator (22) and that at least one channel outlet (48) is provided, which is arranged such that Cleaning agent is discharged on exit from the channel outlet (48) on a stator outer surface (50). Stirrer (10) after Claim 9 characterized in that the at least one channel outlet (48) is disposed on a projection extending in a plane perpendicular to the drive axis (12) and tangent to the stator (22). Stirrer (10) according to at least one of the preceding claims, characterized in that the channel outlets (40, 44, 46, 48) are formed as arranged on the rod-like connection means (28) spray nozzles or as openings in the connecting tubes (28). A stirring device for agitating media, comprising a container for media to be stirred and a stirrer (10) arranged in the container according to at least one of the preceding claims, and a pump for conveying detergent, which is fluidically connected to the inlet of the at least one detergent channel.

Images