Stirrer device

Abstract

The invention relates to an agitator device (1) comprising a shaft that can be driven rotatably about an axis of rotation (A), a drive device (10) arranged at a first shaft end for driving the shaft, an agitator mechanism (6) arranged at a second shaft end in a rotationally fixed manner with respect to the shaft, and an agitator stand (2) having a carrier device (14). The agitator (5) has a housing section (15), on which a receiving device (16) for receiving an elastic bearing element (17) is arranged, the bearing element (17) resting on a carrier device (14) of the agitator stand (2).

Description

Technical Field

[0001] The present invention relates to a stirrer device, which has a shaft that can be driven rotatably around a rotation axis, a drive device arranged on a first shaft end for driving the shaft, a stirring mechanism arranged on a second shaft end to be non-rotatably connected to the shaft, and a stirrer stand with a bracket device. Background Art

[0002] Such agitators, also called flow generators, are used in many fields, for example for recirculating activated sludge in activation tanks, for conveying rainwater, river water, surface water and reclamation water and for generating flows in water bodies. The agitators should achieve good flow guidance in the corresponding tanks or equipment in order to solve the corresponding process tasks, such as good mixing of multiple phases.

[0003] The agitator is usually arranged on a free-standing agitator stand as known from EP 2328676 A1 or is fixed to the tank wall by means of guides and support pipes, as known from EP 2659959 A1. EP 2689831 A1 describes a stirring mechanism arranged on a container cover. Summary of the invention

[0004] The object of the present invention is to provide a stirrer device in which the forces occurring on the stirrer are at least partially transmitted into the stirrer stand and in which the force-transmitting elements can be easily replaced in the event of maintenance.

[0005] This object is achieved by a mixer having the features of claim 1, wherein the mixer, in particular a submersible motor mixer, has a housing section on which a receiving device is provided for receiving a resilient supporting element, wherein the supporting element is placed on a support device of a mixer stand.

[0006] In an advantageous embodiment, the receiving device comprises a groove bottom which at least partially radially surrounds the housing section, a radially surrounding first groove wall and an axially spaced second groove wall which extends substantially parallel to the first groove wall, whereby the supporting element is held in its optimal position, in particular when it is lowered onto the agitator stand.

[0007] The support element is fixed to the housing section by means of at least one connecting device, which additionally ensures that the support element is arranged in an optimal position.

[0008] Advantageously, the support element has a corresponding recess for inserting a tool near the connecting device so that the support element can be prestressed and completely in contact with the groove bottom before the connecting device is fixed, preferably in the form of a bolt with a washer and a nut or in the form of a screw.

[0009] In order to transmit the forces occurring on the stirrer particularly well into the stirrer stand, the support element comprises an elastic material, preferably rubber or plastic. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Further advantages, features and effects of the present invention can be seen from the following drawings.

[0011] Figure 1 A perspective view of a stirrer according to the present invention is shown;

[0012] Figure 2 A detailed view of a stirrer according to the invention is shown;

[0013] Figure 3 shows another detail view of the agitator according to the invention; and

[0014] Figure 4 The stirrer according to the invention is shown in a sectional illustration in detail. DETAILED DESCRIPTION

[0015] Figure 1 The mixer device 1 is shown with a mixer stand 2 which is produced in the present embodiment variant as a one-piece concrete or mineral casting part and has a foot part 3 and a receiving part 4. The receiving part 4 is contoured in such a way that it can receive a submerged motor mixer 5 and fix it in its operating position.

[0016] The submersible motor stirrer 5 has a stirring mechanism 6, which is designed here as a propeller with three blades 7. A guide mechanism 8 projects beyond the stirrer stand 2 and is located at Figure 1 This guide 8 is designed here as a steel tube with a square cross section and serves only to guide the submersible motor stirrer 5 during lowering or removal.

[0017] The propeller or stirring mechanism 6 comprises a hub body 9 on which the blades 7 are arranged.

[0018] The stirrer 5 has a drive 10 which has a motor and a gear mechanism (not shown in detail). A shaft (not shown) is connected to the drive with a first shaft end (not shown) and can be driven rotatably about an axis of rotation A.

[0019] The stirring mechanism 6 is arranged in a rotationally fixed manner with the shaft at a second shaft end not shown. Figure 1The three blades 7 shown are arranged on the hub body 9 and extend from the hub body 9 substantially in the radial direction with respect to the rotation axis A. Each of the blades 7 comprises a foot 11 for fixing to the hub body 9. The blades 7 have an inflow edge region 12 and an outflow edge region 13 opposite the inflow edge region 12 along a substantially radial extension. The stirring mechanism 6 rotates counterclockwise from the perspective of the drive device 10.

[0020] In the area of ​​the guide 8, the stirrer stand 2 has a known holding device, not shown in detail here, which holds the stirrer 5 in its correct position for operation. The stirrer 5, in particular the receiving part 4, also has a support device at 14, on which the stirrer 5 is supported.

[0021] If it can be Figures 2 to 4 As known, the agitator 5 comprises a cylindrical housing section 15, on which a groove-shaped receiving device 16 is arranged, which is used to receive an elastic supporting element 17. The receiving device 16 comprises a groove bottom 18 that at least partially surrounds the housing section 15 radially. In the embodiment shown, the groove bottom 18 is formed by a shoulder 19 that protrudes radially compared to the outer circumference of the housing section 15. The receiving device 16 also includes a radially surrounding first groove wall 20 and an axially spaced second groove wall 21 that extends substantially parallel to the first groove wall. The two groove walls 20, 21 protrude from the shoulder 19 substantially over their entire length. The elastic supporting element 17 is arranged between the two groove walls 20, 21 while resting on the groove bottom 18. In order to withstand vibrations, the supporting element 17 comprises an elastic material, such as rubber or plastic.

[0022] The support element 17 can be fixed to the housing section 15 in the region of the receiving device 16 by means of at least one connecting device 22, wherein in the exemplary embodiment shown, the connecting device each comprises a screw 23 which has a washer 24 and a nut 25. The screw 23 is screwed into a threaded hole 26 provided in the housing section 15.

[0023] A through hole 27 is provided in the support element 17, into which a preferably metallic sleeve 28 is inserted, through which a part of the connection device 22, in particular the screw 23, extends. The sleeve 28 ensures that the support element 17 is not squeezed too hard by tightening the nut. In addition, the sleeve ensures that the nut 25 or the screw can be tightened in a defined manner.

[0024] In the embodiment shown, two connecting means 22 are provided. In an alternative embodiment (not shown), screws are provided as connecting means.

[0025] Furthermore, it is conceivable that the support element 17 completely surrounds the housing portion 15 at one time and is fastened to the housing portion 15 only by means of the connecting device 22 .

[0026] The support element 17 has a recess 29 for inserting a tool in the vicinity of the connection device 22 and in the installed state above the connection device 22. With a tool that is inserted through the recess 29 in the support element 17 and into a bore 30 provided in the housing section 15, the shaped element can be pretensioned by means of a lever and thus brought into full contact with the groove bottom 18 before the nut 25 is tightened.

[0027] The support element 17 rests on a support device 14 of the stirrer stand 2, in particular of the receiving part 4. The support device 14 has a substantially semicircular shape.

[0028] Depending on the diameter of the housing section 15, the shoulder 19 can have a greater or lesser radial extent perpendicular to the axis of rotation, so that the axis of rotation A of the stirrer 5 is oriented essentially horizontally. In an alternative embodiment, the groove bottom 18 and the two groove walls 20, 21 can be formed at least partially by recesses in the housing section 15, in particular in its outer circumference.

Claims

1. A stirrer device (1) having A shaft rotatably drivable about an axis of rotation (A); a drive device (10) arranged on the first shaft end for driving the shaft; a stirring mechanism (6) arranged on the second shaft end in a rotationally fixed manner with respect to the shaft; and a stirrer stand (2) with a bracket device (14), It is characterized in that The stirrer (5) has a housing section (15) on which a receiving device (16) is provided for receiving a resilient supporting element (17), wherein the supporting element (17) is placed on a support device (14) of a stirrer stand (2).

2. The stirrer device (1) according to claim 1, characterized in that The receiving device (16) comprises a groove bottom (18) which at least partially radially surrounds the housing section (15), a radially surrounding first groove wall (20), and a second groove wall (21) which extends substantially parallel to the first groove wall and is axially spaced apart.

3. Agitator device (1) according to any one of claims 1 or 2, characterized in that The support element (17) is fastened to the housing section (15) by means of at least one connecting device (22).

4. Agitator device (1) according to any one of claims 1 to 3, characterized in that The support element (17) has a cutout (29) in each case for inserting a tool in the vicinity of the connecting device (22).

5. Agitator device (1) according to any one of claims 1 to 4, characterized in that The support element (17) consists of an elastic material, preferably rubber or plastic.

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