Dispersing device with temperature sensor

Abstract

A dispersing device (1) has a dispersing tool (3), which has a shaft tube (2), and a drive (4). A dispersing rotor is provided at the free shaft tube (2) end (5) remote from the drive (4), the dispersing rotor being connected to the drive (4) via a shaft which can be coupled to the drive (4) and which is arranged within the shaft tube (2). In order to monitor the temperature of the medium to be dispersed, a temperature sensor (7) with a corresponding electric input and output line (8) is provided on the shaft tube (2), which is stationary relative to the dispersing rotor and the rotatable shaft, the input and output lines (8) connecting the temperature sensor (7) to the drive (4) and/or analyzing electronics and/or a control or regulating device.

Claims

1. A dispersing device (1) comprising a dispersing tool (3) and a drive (4), the dispersing tool (3) has a fixed shaft tube (2) and on a free end (5) of which, facing away from the drive (4), is provided a dispersing rotor which is drivable via a rotatable shaft connected to the drive (4) and disposed in the fixed shaft tube (2), a temperature detector (7) with an associated electrical input and output line (8) is disposed on the fixed shaft tube (2) and forms a fixed connection with the fixed shaft tube, the temperature detector being located on an outer side of the fixed shaft tube and configured for insertion with the fixed shaft tube and the dispersing rotor into direct contact with a medium being dispersed.

2. The dispersing device as claimed in claim 1, wherein the temperature detector (7) protrudes away from the shaft tube (2) creating an isolating distance so that the temperature detector (7) is thermally isolated from the shaft tube (2) which receives the shaft.

3. The dispersing device as claimed in claim 1, wherein the temperature detector (7) is disposed, such that it protrudes in at least one of an angled-off or bent arrangement, on an outer side of the shaft tube (2), in a region of the free end of the shaft tube (2) which is facing away from the drive.

4. The dispersing device as claimed in claim 1, wherein the temperature detector (7) is pivotable away from an outer side of the shaft tube (2), via a pivot joint (9) disposed on the shaft tube (2), from said pivot joint into a protruding usage position.

5. The dispersing device as claimed in claim 1, wherein the temperature detector (7) is deployable from the shaft tube (2) by a spring force.

6. The dispersing device as claimed in claim 1, wherein an end (10) of the temperature detector (7) which is close to the free end (5) of the shaft tube (2) protrudes from the shaft tube (2).

7. The dispersing device as claimed in claim 1, wherein the temperature detector (7) in a usage position protrudes from the shaft tube (2) at an acute angle.

8. The dispersing device as claimed in claim 1, wherein the input and the output line (8) connect the temperature detector (7) to at least one of an electronic evaluation unit or the drive (4) is disposed on one of a outer side of the shaft tube (2) or within the shaft tube (2).

9. The dispersing device as claimed in claim 1, wherein the input and the output line (7) are at least one of a metal, gold coating, or an electrically conductive film, which is fastened to an outer side of the shaft tube (2).

10. The dispersing device as claimed in claim 1, wherein the input and the output line (8) of the temperature detector (7) is disposed within at least one of a groove or recess provided on the outer side of the shaft tube (2).

11. The dispersing device as claimed in claim 1, wherein the input and the output line (8) are formed by at least one of a cable or a cable connection.

12. The dispersing device as claimed in claim 1, wherein the shaft tube (2) has a channel for reception of the input and the output line (8) of the temperature detector (7).

13. The dispersing device as claimed in claim 1, wherein the dispersing tool (3), for connection to the drive (4), has a plug-in coupling (11) on an end of the shaft tube (2) which in a usage position is facing the drive (4), the plug-in coupling (11) having electrical contacts via which the input and the output line (8) of the temperature detector (7) are electrically contacted with at least one of the drive (4) or an electronic evaluation unit.

14. The dispersing device as claimed in claim 13, wherein the drive (4) or the electronic evaluation unit has a regulating device for the drive (4) for processing measurement data of the temperature detector (7) and for regulating the drive (4).

15. The dispersing device as claimed in claim 1, further comprising a display (13) for displaying operating parameters.

16. The dispersing device as claimed in claim 1, wherein the temperature detector (7) is disposed close to a slotted region (6) of the free end (5) of the shaft tube (2), within which slotted region (6) the dispersing rotor is provided.

17. The dispersing device as claimed in claim 1, wherein the input and the output line (8) of the temperature detector (7) are disposed in a direction of extent of a longitudinal center axis of the shaft tube (2).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) An illustrative embodiment of the invention is described in greater detail below with reference to the figures of the drawing, wherein, in partially schematized representation:

(2) FIG. 1 shows a diagrammatic side view of an inventive dispersing device comprising a dispersing tool coupled to a drive and having a temperature detector close to that region of its shaft tube which is slotted for the dispersion, and

(3) FIG. 2 shows on an enlarged scale a perspective side view of the dispersing tool, separate from the drive of the dispersing device represented in FIG. 1, having a temperature detector, located in the usage position, close to the free end of the shaft tube, and having a plug-in coupling having two electrical contacts, which contacts serve for the transfer of the measurement signals, transmitted via the input and output line, to the drive and/or to an electronic evaluation unit and/or a regulating device.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

(4) A dispersing device, denoted in its entirety by 1 has according to FIG. 1 a dispersing tool 3, which has a shaft tube 2 and on the free, in the usage position, lower end 5 of which, facing away from a drive 4, is provided a laterally slotted region 6. Within this laterally slotted region 6 is found a dispersing rotor (not visible in the figures), which is driven via a shaft and which, in cooperation with the slotted region 6, transmits to the medium to be dispersed the shearing forces necessary for the dispersion and, in this respect, corresponds to the dispersing tool according to DE 10 2004 009 708 B3. The slots of this region 6 here run parallel to the longitudinal extent of the shaft tube 2 and are open in the direction of the free end 5.

(5) According to FIGS. 1 and 2, a temperature detector 7 with an associated electrical input and output line 8 disposed on the outer side of the shaft tube 2 is provided on the free end 5. According to FIG. 2, the input and output line 8 runs from the temperature detector 7 via the outer side of the shaft tube 2 in the direction of the drive 4 and connects this, in the coupled-up usage position of the dispersing tool 3, to the temperature detector 7.

(6) In order to be able to determine the temperature of the medium to be dispersed, without disturbance from a possible build-up of heat, the temperature detector 7 is thermally isolated from the shaft tube 2 receiving the shaft.

(7) Both figures show that the temperature detector 7, for its isolation from the outer side of the shaft tube 2, protrudes obliquely or is angled-off or bent and is disposed in the region of that end 5 of the shaft tube 2 which is facing away from the drive 4.

(8) FIG. 2 further shows that the temperature detector 7 is pivotable away from the outer side of the shaft tube 2, via a pivot joint 9 disposed on the shaft tube 2, from said pivot joint into its protruding and thereby isolated usage position.

(9) If the temperature detector 7 is pivoted back into a position bearing against the shaft tube 2, it can be sunk in a recess or in a groove 71, so that it does not project beyond the outer contour of the shaft tube 2 and is well protected. This is advantageous, in particular, for the storage of the dispersing tool 3, since the temperature detector 7 can thus be well protected from possible damage.

(10) It is here possible for the temperature detector 7 to be able to be deployed from the shaft tube 2 by a spring force (indicated by the small arrow in FIG. 2) of a spring element (not represented in the figures).

(11) That embodiment of the invention which is represented in the figures has a temperature detector 7, which protrudes at an acute angle and with its end 10 proximate to the free end of the shaft tube 5, so as to assume a maximum possible distance to the shaft tube 2.

(12) One embodiment of the invention (not represented in the figures) can also provide, however, that the temperature detector 7 protrudes from the shaft tube 2 in the reverse direction and/or, for instance, at right angles.

(13) In particular, FIG. 2 shows that the input and output line 8, which connects the temperature detector 7 to an electronic evaluation unit and/or to the drive 4, as can be seen from FIG. 1, is disposed on the outer side of the shaft tube 2. It is here also conceivable for the input and output line 8 to be disposed within the shaft tube 2.

(14) The preferred embodiment of the invention provides that the input and output line 8 is a metal and/or gold coating which exhibits particularly good electrical conductivity. The use of an electrically conductive film and/or a hybrid of film and metal coating as an input and output line 8, which is fastened, in particular, to the outer side of the shaft tube 2, is likewise possible.

(15) In FIG. 2 it can be seen that the input and output line 8 of the temperature detector 7 is applied to, in particular is vapor-coated onto the outer side of the shaft tube 2.

(16) It is also possible to arrange the input and output line such that it is embedded in sunken arrangement within a groove on the outer side of the shaft tube 2. This groove could also be recessed into the inner side of the shaft tube 2 or into its inside surface.

(17) In a non-represented embodiment of the invention, the input and output line 8 is formed by a cable and/or a cable connection. For the reception of this cable or this cable connection, the shaft tube 2 is here provided with a channel of optional cross section, which channel securely fixes and safely shields this input and output line 8.

(18) According to FIG. 2, the dispersing tool 3 has for mechanical connection to the drive 4 a plug-in coupling 11 on that end of the shaft tube 2 which, in the usage position of the dispersing tool 3, is facing the drive 4. FIG. 2 further shows that this plug-in coupling 11 has electrical contacts, in the present illustrative embodiment two spring contacts 12, via which the input and output line 8 of the temperature detector 7 is electrically contacted with the drive 4 and/or the electronic evaluation unit.

(19) For the use of the dispersing device 1 in a partially automated and/or fully automated dispersion process, the drive 4 and/or the electronic evaluation unit is equipped with a control or regulating device for the drive 4 for processing the measurement data of the temperature detector 7 and for controlling or regulating the drive 4. With the aid of the control or regulating device, dispersion operations can be controlled or regulated automatically in dependence on the prevailing temperature of the medium or dispersing agent.

(20) If the heat input into the dispersing agent through the rapidly rotating dispersing rotor is too large, for example, and its temperature is already reaching a preset limit value, the speed of the shaft and of the dispersing rotor can be reduced until such time as the medium has cooled off again or the drive 4 can be shut down by the control or regulating device.

(21) According to FIG. 1, the dispersing device 1 has a display 13 for displaying the operating parameters, in particular for displaying the temperature values measured by the temperature detector 7.

(22) Furthermore, it is possible for the temperature detector 7, in the usage position of the dispersing device 1, to be displaceable on the shaft tube 2 in the vertical direction. If the temperature detector 7 on the shaft tube 2 and/or in a groove is provided with a linear actuating drive, its height adjustment can even be realized automatically.

(23) A further embodiment (not represented in the figures) provides that the dispersing device 1 has in addition to the temperature detector 7 a moisture sensor. Any dry running of the dispersing device 1 due to a reduction in the level of the medium, for instance, is promptly detected, and damage which could consequently arise, in particular on the bearing of the shaft, is thus avoided.

(24) The moisture sensor is here disposed preferably at the same height or at the same distance from the slotted region 6 and at the same place as the temperature detector 7 on the shaft tube 2, or else is directly connected to the temperature detector 7 or fastened thereto. The moisture sensor can thus be deployed from the shaft tube 2, jointly with the temperature detector 7, into the usage position and, on the basis of a moisture measurement, a check can reliably be made on whether the temperature detector 7 is properly positioned in the medium to be dispersed or whether it is found outside the medium and there measures the temperature of the surrounding air.

(25) In order to be able to check and monitor the position of the temperature detector 7 with sufficient accuracy, even at different and/or changing fill level heights or levels of the medium to be dispersed, the moisture sensor in another embodiment of the invention is attached together with the temperature detector 7, in a manner already described, in usage position to the shaft tube 2, such that it is height-adjustable in the vertical direction.

(26) The dispersing device, denoted in its entirety by 1, has a dispersing tool 3, which has a shaft tube 2, and a drive 4. On the free end 5, facing away from the drive 4, of the shaft tube 2 is provided a dispersing rotor, which is connected to the drive 4 via a shaft which can be coupled to the drive 4 and is disposed within the shaft tube 2. For the monitoring of the temperature of the medium to be dispersed, a temperature detector 7 with associated electrical input and output line 8, which input and output line 8 connects the temperature detector 7 to the drive 4 and/or an electronic evaluation unit and/or a control or regulating device, is provided on the shaft tube 2, which is fixed relative to the dispersing rotor and the rotatable shaft.